Overnight temperatures at Ferny Grove were close to average in summer 2020-21. Daytime temperatures were close to average and the lowest in 9 years. Most of the official sites observed near average overnight and daytime temperatures. Rainfall at Ferny Grove was near average and was near average at most of the official sites. During summer at Ferny Grove air pressure was below average, humidity was above average, mean minimum dew point and mean dew point was near average, mean maximum dew point was above average, wind speed was above average with 10 thunderstorms (14 thunder days).
Seasonal Mean Daily Minimum Temperature: 20.3 ºC, 0.3 ºC above average and 0.6 ºC lower than the same season in 2019-20. This is the fifth highest seasonal mean daily minimum temperature on record for summer and the lowest since 19.2 ºC in 2017-18. Summer mean minimum temperatures were close to average as observed by most of the official sites in the Brisbane area and was above average at some locations. Most sites were between 0.3 ºC and 0.5 ºC above average with the lowest anomaly being observed at Redcliffe that equalled the long term average with a mean minimum temperature of 21.8 ºC. Three sites observed above average mean minimum temperatures that were 0.7 ºC above average at Archerfield (20.6 ºC) and Logan City Treatment Plant (20.9 ºC) and 0.6 ºC above average at Gatton (19.3 ºC). The lowest mean minimum temperature was 18.1 ºC at Canungra and the highest was 22.1 ºC at Cape Moreton Lighthouse (0.4 ºC above average). Brisbane observed a mean minimum temperature of 21.7 ºC (0.5 ºC above average).
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Lowest Monthly Mean Daily Minimum Temperature (January): 20 ºC, 0.6 ºC above average and 1.9 ºC lower than same month in 2020. This is the fifth lowest on record for January and the lowest since 19.1 ºC in 2018. Official sites in the Brisbane area observed mean minimum temperatures that were close to average at most sites and below average at some sites. Most sites observed mean minimum temperatures that were close to average that were within 0.5 ºC of the long term average and the highest mean minimum temperature was equal to the long term average at Cape Moreton Lighthouse (22 ºC) and Logan City Treatment Plant (20.7 ºC). Some sites measured below average mean minimum temperatures of up to 0.8 ºC below average at Redcliffe, with a mean minimum temperature of 21.5 ºC and was 0.7 ºC below average at Beaudesert (18.7 ºC). The lowest mean minimum temperature was 19.2 ºC at Amberley (0.4 ºC below average) and the highest mean minimum temperature was 22 ºC at Cape Moreton Lighthouse (equal to the long term average). Brisbane observed a mean minimum temperature of 21.3 and was 0.4 ºC below average.
Highest Monthly Mean Daily Minimum Temperature (December): 20.8 ºC, 1.6 ºC above average and 1.2 ºC higher than same month in 2019. This is the second highest on record for December and the second highest since the current record high of 21.1 ºC in 2009. All the official stations in the Brisbane area observed above or well above average mean minimum temperatures, with the highest anomalies observed by the inland sites. A number of sites observed temperatures that at least 2 ºC above average of 2.1 ºC above average at Archerfield with a mean minimum temperature of 21.2 ºC and Beaudesert (20.2 ºC) and Logan City Treatment Plant observed a mean minimum temperature of 2 ºC above average (21.3 ºC). The mean minimum temperature for Cape Moreton Lighthouse was closest to the long-term average at 1.2 ºC above average, with a mean minimum temperature 22.2 ºC. The lowest mean minimum temperature was 18.9 ºC at Canungra. The remaining sites were between 1.2 ºC and 1.8 ºC above average. The highest mean minimum temperature was 22.4 ºC at Redcliffe (1.4 ºC above average). Brisbane observed a mean minimum temperature of 22.2 ºC, 1.8 ºC above average. Amberley, Archerfield and Gatton observed the highest mean minimum temperature in 23 to 41 years and Logan City Treatment Plant, Brisbane Aero and Brisbane observed were the highest on record for December.
Monthly Mean Minimum Daily Temperature for February: 20.3 ºC, equal to the long term average and 0.9 ºC lower than same month in 2020. This is the sixth lowest on record for February and the lowest since 19.7 ºC in 2018. All of the official stations in the Brisbane area observed near average mean minimum temperatures that was slightly below average at some locations. The mean minimum temperatures ranged between 0.3 ºC below average at both Amberley with a mean minimum temperature of 19.2 ºC and Redcliffe (21.6 ºC) and 0.2 ºC above average at Archerfield (20.4 ºC). The lowest mean minimum temperature observed was 17.7 ºC at Canungra and the highest mean minimum temperature was 22.1 ºC at Cape Moreton Lighthouse which was equal to the long term average. Brisbane observed a mean minimum temperature of 21.5 ºC and was 0.1 ºC above average.
Seasonal Mean Daily Maximum Temperature: 30.2 ºC, equal to the long term average and 1.7 ºC lower than the same season in 2019-20. This is the third lowest on record for summer and the lowest since the current record low of 28.6 ºC in 2011-12. Most of the official sites in the Brisbane area saw close to average mean maximum temperatures in summer, whilst some sites were above average. The sites measuring close to average mean maximum temperatures ranged between 0.3 ºC below average at Beerburrum with a mean maximum temperature of 29.7 ºC and Logan City Treatment Plant (29.2 ºC) and 0.4 ºC above average at Archerfield (30.4 ºC). Gatton observed the highest mean maximum temperature of all the official sites of 32.6 ºC (1.3 ºC above average). Cape Moreton Lighthouse also observed an above average mean maximum temperature that was 1.2 ºC above average with a mean maximum temperature of 27.9 ºC but observed the lowest mean maximum temperature of all the sites. Brisbane observed a mean maximum temperature of 29.9 ºC, 0.2 ºC below average.
Lowest Monthly Mean Daily Maximum Temperature (January): 30.3 ºC, 0.8 ºC below average and 2.7 ºC lower than same month in 2020. This is the third lowest on record for January and the lowest since 28.7 ºC in 2012. Mean maximum temperatures at most of the official sites in the Brisbane area were below average and was close to average at some of the inland sites. The highest mean maximum temperature observed was 31.7 ºC at Gatton and was equal to the long-term average. Several sites observed mean minimum temperatures that were near or over 1 ºC below average, with the greatest anomaly being 1.6 ºC below average at Beaudesert (30 ºC). In addition to Gatton, Archerfield was the only other site measuring a near average mean maximum temperature which was 0.4 ºC below average (30.1 ºC). Cape Moreton Lighthouse was 1 ºC above average with a mean maximum temperature of 28 ºC and was the lowest mean maximum temperature observed by the official sites. Brisbane observed a mean maximum temperature of 28.6 ºC and was 0.6 ºC below average.
Highest Monthly Mean Daily Maximum Temperature (February): 30.4 ºC, 0.4 ºC above average and equal to same month in 2020. This is the equal fourth lowest on record for February and the lowest since 29.7 ºC in 2015. Mean maximum temperatures as observed at the official sites were close to average across the Brisbane area and was above average at the inland sites. The sites measuring close to average mean maximum temperatures ranged between 0.4 ºC below average at Brisbane Aero with a mean maximum temperature of 28.7 ºC and equal to the long term average at Redcliffe (29 ºC). The highest anomaly and highest mean maximum temperature observed was 2 ºC above average at Gatton with a mean maximum temperature of 32.8 ºC. Amberley observed a mean maximum temperature that was 1 ºC above average (31.5 ºC), 0.6 ºC above average at Archerfield (30.5 ºC) and 0.9 ºC above average at Cape Moreton Lighthouse (27.8 ºC) which observed the lowest mean maximum temperature of all the official sites. Brisbane observed a mean maximum temperature of 30 ºC and was 0.2 ºC below average.
Monthly Mean Maximum Daily Temperature for December: 30.3 ºC, 0.3 ºC above average and 2.7 ºC lower than same month in 2019. This is the fourth lowest on record for December and the equal lowest since 30.3 ºC in 2015. Mean maximum temperatures were above average at many of the official sites in the Brisbane area. The inland sites observed mean maximum temperatures that were the highest above average of all the sites. Gatton observed the highest mean maximum temperature of 33.3 ºC, which was the highest above the long-term average at 1.9 ºC above average. Amberley and Archerfield were 0.9 ºC above average and was 31.8 ºC and 30.6 ºC respectively and Beerburrum was 0.6 ºC above average at 31.2 ºC. Cape Moreton Lighthouse was 1.7 ºC above average (27.9 ºC) in contrast to near average temperature at the coastal sites and observed the lowest mean maximum temperature. The sites measuring near average mean maximum temperatures were between 0.3 ºC above average at Logan City Treatment Plant (29.5 ºC) and Brisbane (29.9 ºC) and 0.5 ºC above average at Beaudesert (31.2 ºC).
Seasonal Mean Temperature: 25.3 ºC, 0.2 ºC above average and 1.1 ºC lower than same season in 2019-20. This is the fourth lowest on record for summer and the lowest since 25.1 ºC in 2014.
Lowest Mean Monthly Temperature (January): 24.9 ºC, 0.7 ºC below average, 2.1 ºC lower than the same month in 2020. This is the equal second lowest on record for January and the equal lowest since 24.9 ºC in 2011.
Highest Mean Monthly Temperature (December): 25.6 ºC, 1.0 ºC above average, 0.7 ºC lower than the same month in 2020. This is the fourth highest on record for December and the lowest since 24.9 ºC in 2018.
Mean Monthly Temperature (February): 25.3 ºC, 0.2 ºC above average, 2.1 ºC lower than the same month in 2020. This is the fifth lowest on record for February and the lowest since 25.1 ºC in 2018.
Lowest Temperature: 16.6 ºC on 12 January 2021 at 4:49 AM. Same month in 2020 was 18.6 ºC and same season in 2019-20 was 14.4 ºC. This is the second highest on record for January, the highest since the current record high of 18.6 ºC in 2010 on 29 January, the equal ninth lowest daily minimum temperature and the lowest since 16.1 ºC on 20 January 2018 at 5:05 AM. For summer this is the equal highest seasonal minimum temperature on record, the highest since the current record high of 16.6 ºC in 2009-2010 on 3 December, the equal twenty-eighth lowest daily summer minimum temperature and the lowest since 15.1 ºC on 6 December 2019 at 4:52 AM. Official stations in the Brisbane area observed the lowest temperature of the month at many sites on the 11th and 12th and at some sites on the 9th,10th, 21st, 22nd and 24th. The lowest was 13.1 ºC at Canungra on the 12th and the highest was 19.8 ºC at Point Lookout on the 21st. In the Brisbane area there many cooler nights and especially between two periods and especially between the 9th and 15th. Brisbane observed its lowest temperature for the month of 18.5 ºC on the 12th.The lowest temperature for the season for the official sites ranged between 12.9 ºC at Canungra on 9 December 2020 and 17.4 ºC at Cape Moreton Lighthouse and Logan City Treatment Plant on 12 December 2020. The lowest observed temperature at Brisbane in summer was 17.3 ºC on 12 December 2020.
Monthly Lowest Temperature (for December): 16.6 ºC on 27 December 2020 at 4:46 AM. Same month in 2019 was 14.4 ºC. This is the equal highest on record for December, equalling the current record high of 16.6 ºC in 2009 on 3 December, the equal twentieth lowest daily minimum temperature and the lowest since 15.1 ºC on 6 December 2019 at 4:52 AM. Official stations in the Brisbane area observed the lowest temperature of the month at most sites on the 12th and 27th and at some sites on the 9th, 13th and 26th. The lowest was 12.9 ºC at Canungra on the 9th and the highest was 24.4 ºC at Brisbane Aero on the 30th. In the Brisbane area overnight temperatures were above average during much of the month especially the first 8 days and on the 15th to 23rd. Brisbane observed its lowest temperature of 17.3 ºC on the 12th.
Highest Temperature: 36.6 ºC on 16 January 2021 at 12:57 PM. The same month in 2020 was 35.4 and the same season in 2019-20 was 42.8 ºC. This is the fourth lowest monthly maximum temperature for January on record, the highest since 38 ºC in 2018 on 13 January at 1:43 PM, the equal tenth highest daily maximum temperature and the highest since 37.8 ºC on 14 January 2018 at 1:38 PM. For summer this is the second lowest seasonal maximum temperature on record, the lowest since the current record low of 35.2 ºC in 2011 on 21 February at 1:04 PM, the equal nineteenth highest daily maximum temperature and the highest since 37.6 ºC on 3 February 2020 at 12:38 PM. The official sites measured the highest temperature for the month at most sites on the 6th and 16th and at some sites on the 5th and 30th. The lowest was 30 ºC at Cape Moreton Lighthouse on the 6th and the highest was 38.1 ºC at Gatton on the 16th. The highest temperature observed at Brisbane was 35.3 ºC on the 16th. During the month there were some above average maximum temperatures that mostly occurred on the 5th and 6th and on the 15th and 16th due to a trough drawing warm air from the north. The highest temperature for the season of the official sites ranged between 30.6 ºC at Cape Moreton Lighthouse on 8 December 2020 and 43.5 ºC at Gatton on 6 December 2020. The highest observed temperature at Brisbane during summer was 35.3 ºC on 16 January 2021.
Highest Temperature (for December): 35.9 ºC on 6 December 2020 at 11:38 AM. The same month in 2019 was 42.8 ºC. This is the fourth lowest monthly maximum temperature for December on record, the lowest since 35 ºC in 2015 on 11 December at 1:30 PM, the fourteenth highest daily maximum temperature and the highest since 42.8 ºC on 16 December 2019 at 1:00 PM. The official sites measured the highest temperature for the month at most sites on the 6th and 7th and at Point Lookout on the 10th. The lowest was 31.5 ºC at Point Lookout on the 10th and the highest was 43.5 ºC at Gatton on the 6th. The highest temperature observed at Brisbane was 33.9 ºC on the 7th. Most days in the first 8 days of month were above average before above average temperatures returned between the 15th and 23rd with low to severe-intensity heatwaves in the Brisbane area during this time. In the last week of the month, there were some warm days also. Gatton observed a run of three days that were above 40 ºC between the 4th and 6th, having only occurred two other times at Gatton. Gatton observed a new record for the highest December temperature of 43.5 ºC, exceeding the previous record high of 24.9 ºC on 18 December 2012.
Highest Temperature (for February): 36.1 ºC on 7 February 2021 at 1:12 PM. The same month in 2020 was 37.6 ºC. This is the fifth highest and lowest monthly maximum temperature for February on record, the lowest since 35.2 ºC in 2015 on 1 February at 3:31 PM, the equal eighth highest daily maximum temperature and the highest since 37.6 ºC on 3 February 2020 at 12:38 PM. The official sites measured the highest temperature for the month at most sites on the 7th and 21st and at some sites on the 22nd. The lowest was 30.1 ºC at Cape Moreton Lighthouse on the 7th and the highest was 40.4 ºC at Gatton on the 22nd. The highest temperature observed at Brisbane was 35.2 ºC on the 7th. During the month there were several periods of warm days early in the month, briefly on the 12th and 13th and several days later in the month.
Lowest Maximum Temperature: 20.9 ºC on 12 December 2020 at 9:31 AM. This is the second lowest monthly and daily lowest daily maximum temperature for December on record and the lowest since the current record low of 18.9 ºC in 2011 on 7 December at 4:36 PM. Same month in 2019 was 26.6 ºC and this season in 2019-20 was 23.8 ºC. For summer this is the second lowest daily maximum temperature and the lowest since 18.9 ºC on 7 December 2011 at 4:36 PM. The official sites measured the coolest day of the month on the 13th at most sites and at some sites on the 5th and 12th. These ranged between 22.7 ºC at Archerfield and Brisbane on the 13th and 24.3 ºC at Gatton on the 13th. In the middle of the month there were a few cool days before some days in the last week of the month were below average. For summer, the lowest observed maximum temperature at Brisbane was 22.7 ºC on 13 December 2020 and for all of the official sites this was 20.1 ºC at Logan City Treatment Plant on 12 December 2020.
Lowest Daily Maximum Temperature (for January): 22.7 ºC on 8 January 2021 at 10:01 AM. This is the second lowest monthly and daily lowest daily maximum temperature for January on record and the lowest since the current record low of 22.3 ºC in 2012 on 17 January at 1:20 PM. Same month in 2020 was 27.4 ºC. The official sites measured the coolest day of the month on the 8th at all sites. These ranged between 21.2ºC at Beerburrum and 23.3 ºC at Beaudesert. Brisbane observed 23.7 ºC on the 8th. The 8th was a particularly cold day with Brisbane Aero, Beerburrum and Point Lookout observing new record lows of daily maximum temperatures for January.
Highest Daily Minimum Temperature: 26.2 ºC on 7 December 2020 at 4:28 AM. This is the highest daily minimum temperature on record for December exceeding the previous record high of 24.5 ºC in 2012 on 18 December 2020 at 4:00 AM. Same month in 2019 was 26.2 ºC and this season in 2019-20 was 25.4 ºC. For summer this is the second highest daily minimum temperature on seasonal and daily basis and the equal highest since 26.2 ºC on 28 November 2019 at 7:50 AM. In the Brisbane area the warmest night occurred at most sites on the 15th and at Cape Moreton Lighthouse on the 7th and Point Lookout on the 19th. These ranged between 15 ºC at Logan City Treatment Plant and 18.4 ºC at Cape Moreton Lighthouse. The highest minimum temperature measured at Brisbane was 16.9ºC on the 15th. An especially warm night was on the 15th with some sites measuring minimum temperatures that were more than 5 ºC above average. There were some warm nights throughout the month with many of the warm nights on the 7th and 8th and again on the 13th to 16th. Brisbane’s highest minimum temperature observed during summer was 25.8 ºC on 7 December 2020 and this was also the highest for all the official sites during summer.
Highest Daily Minimum Temperature (for January): 22.3 ºC on 28 January 2021 at 5:21 AM. This is the second lowest daily minimum temperature on record for January, the lowest since the current record high of 21.8 ºC in 2016 on 31 January 2020 at 4:55 AM, the twenty-fifth highest daily minimum temperature and the highest since 21.5 on 31 January 2021 at 12:00 AM. Same month in 2020 was 25.4 ºC. In the Brisbane area the warmest nights occurred on the 16th and 18th at many sites and on the 6th, 7th, 18th and 28th at some sites. These ranged between 21.8 ºC at Beerburrum on the 17th and 24.3 ºC at Cape Moreton on the 6th. As warm air was drawn south from the north, ahead of a surface trough, overnight temperatures between the 16th and 18th were above average. During the start of the month and at the end of the month were some above average temperatures.
Highest Daily Minimum Temperature (for February): 23.1 ºC on 28 February 2021 at 5:45 AM. This is the fourth lowest daily highest minimum temperature on record for February, the lowest since 22.1 ºC in 2015 on 19 February 2015 at 4:05 AM, the fourteen highest daily minimum temperature and the highest since 23.2 ºC on 19 February 2020 at 5:35 AM. Same month in 2020 was 23.5 ºC. In the Brisbane area the warmest nights occurred on the 28th at many locations and on the 8th, 23rd and 25th at some sites. These ranged between 22 ºC at Beaudesert on the 8th and 24.5 ºC at Brisbane Aero and Cape Moreton Lighthouse on the 28th. Most warm nights occurred on the 7th and 8th and on many nights during the last 10 days of the month.
Seasonal Average Minimum Grass Temperature: 18.5 ºC (1.2 ºC lower than same season in 2019)
Lowest Seasonal Minimum Grass Temperature: 13.2 ºC on 12 January 2021 (3.7 ºC lower than same month in 2020). This coincided with the lowest minimum air temperature of 16.6 ºC for the month.
Highest Seasonal Minimum Grass Temperature: 21.9 ºC on 7 December 2020 (1.1 ºC lower than same month in 2019). This coincided with the highest minimum air temperature of 26.2 ºC for the month.
Highest Minimum Grass Temperature Depression: 4.3 ºC on 7 December 2020 with a minimum grass temperature of 21.9 ºC and an air temperature of 26.2 ºC.
Lowest Minimum Grass Temperature Depression: -2.4 ºC on 13 December 2020 with a minimum grass temperature of 20.5 ºC and an air temperature of 18.1 ºC.
Minimum temperatures in December were predominately above average during the month and were near or below average in the middle of the month and at the end of the month. The first 8 days of the month saw warm nights that peaked at 7 ºC above average on the 7th before temperatures between the 9th and 14th. Another period of warm nights followed on the 15th to 23rd of between 2 ºC to 4 ºC above average on the 18th to 20th. The remainder of the month was within 1 ºC of the average except for the 30th which was 5 ºC above average.
In January minimum temperatures saw a number of slightly warm nights throughout the month accompanied with some below average temperature throughout much of the month. Minimum temperatures were within 1 ºC of the long term average in the first 8 days of the months before cooling to 2 ºC to 3 ºC below average between the 9th and 13th, peaking at 4 ºC below average on the 12th. The 15th, 16th and 19th were 2 ºC below average and 2 ºC above average on the 18th. Temperature fell again to 2 ºC to 4 ºC below average on the 24th to 26th and was within 1 ºC of the long term average during the rest of the month, except for 2 ºC above average on the 28th.
February minimum temperatures were close to or below average during the month with some warm nights in the middle of the month and in the last week of the month. Minimum temperatures were 2 ºC to 3 ºC below average on the 4th and 5th and warmed to 3 ºC above average on the 8th. Cooler night followed on the 10th, 11th, 13th, 15th, 17th, and 18th at 2 ºC to 3 ºC below average and was otherwise near average. Warmer nights of 2 ºC above average on the 23rd to 25th and 3 ºC above average on the 28th but was close to average on the other days.
Maximum temperatures in December saw two periods of warm days at the start of the month and between the 18th and 23rd, as well as near average or below average temperatures. The 1st to 8th saw days that were peaked at 6 ºC above average on the 6th and was between 4 ºC and 6 ºC above average on the 4th to 7th. After near average temperatures, there were several cool to cold days on the 11th to 14th of between 4 ºC below average on the 14th and 9 ºC below average on the 12th. Further near average temperature followed before temperatures that were between 2 ºC and 4 ºC above average on the 20th to 23rd. During the remainder of the month temperatures were mostly 1 ºC to 4 ºC below average.
Maximum temperatures in January were predominately below average that saw very few warm days during the month. The 1st to 4th was 1 ºC to 2 ºC below average, warmed temporarily to 3 ºC to 4 ºC above average on the 5th and 6th and then below average until the 12th and as much as 8 ºC below average on the 8th. A warm period on the 15th and 16th that rose to 6 ºC above average before cooling back during most of the following days. The 20th to 23rd was 1 ºC to 4 ºC below average and eased to within 1 ºC of the long term average during the rest of the month, though was 2 ºC below average on the 31st.
Maximum temperatures in February were below average during many days of the month and were above average during some days mostly occurring late in the month. The 2nd was 5 ºC below average and 2 ºC below average on the 3rd, warming to 2 ºC above average on the 6th and 5 ºC above average on the 7th. Below average temperatures of 1 ºC to 3 ºC below average then followed on the 8th to 12th. The 13th was 3 ºC above average, before cooler days between the 14th and 20th that peaked at 5 ºC below average on the 18th. The 21st to 23rd was warmer that reached 2 ºC above average on the 23rd. During the rest of the month were a mixture of near average, slightly warm and slightly cool days.
Seasonal Mean Daily Minimum MSL Pressure: 1009.7 hPa (0.1 hPa lower than same season in 2019-20). This is the third lowest on record for summer and the lowest since 1009.6 hPa in 2017-18.
Monthly Mean Daily Minimum MSL Pressure (for February): 1008.5 hPa (equal to same month in 2020). This is the equal lowest for February equalling 1008.5 hPa in 2020.
Seasonal Mean Daily Maximum MSL Pressure: 1014.1 hPa (0.3 hPa lower than same season in 2019-20). This is the third lowest on record for summer and the lowest since 1013.7 hPa in 2011-12.
Monthly Mean Daily Maximum MSL Pressure (for February): 1012.8 hPa (0.5 hPa lower than same month in 2020). This is the lowest on record for February exceeding the previous record low of 1013.3 hPa in 2020.
Seasonal Mean MSL Pressure: 1011.9 hPa (1 hPa below average) and 0.2 hPa lower than same season in 2019-20. This is the third lowest on record for summer and the lowest since 1011.7 hPa in 2012.
Monthly Mean MSL Pressure (for February): 1010.7 hPa (2.2 hPa below average, 0.2 hPa lower than same month in 2020). This is the lowest on record for February exceeding the previous record low of 1010.9 hPa in 2020.
Lowest Seasonal MSL Pressure: 1000.8 hPa on 21 February 2021 at 3:27 PM. The same month in 2020 saw 1002.9 hPa and the same season in 2019-20 saw 998.2 hPa. This is the fourth lowest monthly minimum air pressure for February, the seventh lowest daily minimum air pressure for February and the lowest since 1000 hPa in 2017 on 14 February at 12:20 AM. For summer this is the fourth highest seasonal minimum air pressure, the equal highest since 1000.8 hPa in 2017-18 on 5 December at 4:23 PM, the fourteenth lowest daily minimum air pressure for summer and the lowest since 998.2 hPa on 9 November 2019 at 3:03 PM.
Monthly Lowest MSL Pressure (for December): 1004.1 hPa on 6 December 2020 at 4:33 PM. The same month in 2019 saw 1006.5 hPa. This is the third highest monthly minimum air pressure for December, the highest since 1005.9 hPa in 2015 on 11 December at 4:40 PM, the twenty-first lowest daily minimum air pressure for December and lowest since 1003.9 hPa in 2019 on 16 December at 1:54 PM.
Seasonal Highest Pressure: 1020.9 hPa on 12 December 2020 at 10:26 AM. The same month in 2019 saw 1030 hPa and the same season in 2019-20 was 1020.2 hPa. This is the fifth lowest December monthly maximum air pressure, the lowest since 1019.5 hPa in 2017 on 10 December at 8:42 PM, the equal sixteenth highest daily maximum air pressure for December and the highest since 1021.2 hPa in 2019 on 9 December at 8:07 AM. For summer this is the fourth lowest seasonal pressure on record, the lowest since 1019.7 hPa in 2017-18 on 7 February at 8:44 PM, the nineteenth highest daily air pressure and the highest since 1021.2 hPa on 9 December 2019 at 8:07 AM.
Monthly Highest MSL Pressure (for February): 1017.1 hPa on 18 February 2020 at 10:13 AM. The same month in 2020 saw 1020.6 hPa. This is the lowest February monthly maximum air pressure on record exceeding the previous record low of 1019.7 hPa in 2014 on 9 February at 8:06 AM.
Note: Air pressure measurements are being closely monitored to maintain its accuracy as much as possible. Over the season, a difference of 0.12 hPa lower compared to the official BoM Brisbane site – No. 040913 was observed which is deemed to be optimum.
Seasonal Mean Daily Minimum Humidity: 54.6 % (10.3 % higher than same season in 2019-20 and 1.7 % above average). This is the fourth highest on record for summer and the highest since 56.5 % in 2014-15.
Monthly Mean Daily Minimum Humidity (for December): 54.4 % (11.1 % higher than same month in 2019 and 3.5 % above average). This is the fourth highest on record for December and the highest since 56.7 % in 2011.
Monthly Mean Daily Minimum Humidity (for January): 54.1 % (3 % higher than same month in 2020 and 1.2 % above average). This is the fifth highest on record for January and the highest since 58.2 % in 2015.
Seasonal Mean Daily Maximum Humidity: 93.3% (10.2% higher than same season in 2019-20 and 2% above average). This is the fourth highest on record for summer and was the highest since 93.9 % in 2015.
Monthly Mean Daily Maximum Humidity (for January): 93.9 % (4.2 % higher than same month in 2020 and 2.8 % above average). This is the third highest on record for January and the highest since 95.3% in 2015.
Seasonal Mean Humidity: 73.9 % (10.2 % higher than same season in 2019-20 and 1.8 % above average). This is the fourth highest on record for summer and the highest since 75.2 % in 2015.
Monthly Mean Humidity (for December): 73.4 % (8.5 % higher than same month in 2019 and 2.6 % above average). This is the third highest on record for December and the highest since 75.6 % in 2011.
Monthly Mean Humidity (for January): 74 % (3.6% higher than same month in 2020 and 2 % above average). This is the fifth highest on record for January and the highest since 76.7 % in 2015.
Seasonal Lowest Humidity: 19 % on 8 December 2020 at 3:49 PM (12% higher than this month in 2019 and the same season in 2019-20). This is the fourth lowest monthly minimum humidity for December on record, the highest since 26 % in 2017 on 7 December at 12:56 PM, the sixth lowest daily minimum humidity for December and the lowest since 9% on 16 December 2019 at 9:21 AM. For summer this is the equal fourth lowest seasonal minimum relative humidity, the highest since 26% in 2018 on 7 December at 12:56 PM, the equal sixth lowest daily minimum relative humidity and the lowest since 9% on 16 December 2019 at 12:43 PM.
Seasonal Highest Humidity: 99 % on 15 December 2020 at 5:28 AM (2% higher than month in 2019 and equal to same season in 2019-20). This is the third highest and lowest monthly December maximum humidity on record and the equal lowest since 99% in 2017 since the current record low of 87% in 2016 on 20 December at 6:59 AM. For summer this is the second highest seasonal maximum relative humidity on record and the highest since 100% in 2017-18 on 26 February at 7:05 AM.
Monthly Highest humidity (for November): 96 % on 15 November 2020 at 2:01 AM (2 % lower than this month in 2019). This is the equal third highest monthly November maximum humidity on record and the second lowest since the current record low of 87% in 2016 on 20 November at 6:59 AM.
Seasonal mean daily minimum dew point: 17.8 ºC (0.2 ºC above average). This is the fifth highest seasonal mean minimum dew point on record for summer, and the highest since 18.4 ºC in 2016-17.
Monthly mean daily maximum dew point (for December): 17.8 ºC (1.3 ºC above average). This is the second highest monthly mean minimum dew point for December on record and the highest since the current record high of 19.1 ºC in 2010.
Seasonal mean daily maximum dew point: 22.2 ºC (0.7 ºC above average). This is the second highest seasonal mean maximum dew point on record for summer and the highest since the current record high of 22.3 ºC in 2016-17.
Monthly mean daily maximum dew point (for December): 22.4 ºC (1.6 ºC above average). This is the highest mean maximum dew point for December on record exceeding the previous record high of 21.7 ºC in 2017.
Monthly mean daily maximum dew point (for February): 22.4 ºC (0.5 ºC above average). This is the second highest mean maximum dew point for February and the highest since the current record high of 23.7 ºC in 2020.
Seasonal mean dew point: 20 ºC (0.5 ºC above average). This is the fourth highest seasonal mean dew point on record for summer and the highest since 20.3 ºC in 2016-17.
Monthly mean daily dew point (for December): 22.4 ºC (1.6 ºC above average). This is the highest mean maximum dew point for December on record exceeding the previous record high of 21.7 ºC in 2017.
Seasonal lowest dew point: 4.9 ºC on 8 December 2020 at 3:51 PM. This is the fourth lowest monthly minimum dew point for December on record, the highest since 10.9 ºC in 2017 on 6 December at 3:42 PM, the tenth lowest daily dew point for December and the lowest since 2.8 ºC on 16 December 2019 at 12:43 PM. For summer this is the fourth lowest seasonal minimum dew point on record, the highest since 10.9ºC in 2017-18 on 6 December at 3:42 PM, the tenth lowest daily dew point for summer and the lowest since 2.8 ºC on 16 December 2019 at 12:43 PM.
Seasonal highest dew point: 25.5 ºC on 17 January 2020 at 12:12 PM. This is the fifth highest monthly maximum dew point on record for January, the highest since 26.1 C in 2018 on 1 January at 2:07 PM, the tenth highest daily dew point on record for January and the highest since 25.7 ºC on 21 January 2020 at 1:36 PM. For summer this is the fourth lowest seasonal maximum dew point on record, the lowest since 25.3 ºC in 2018-19 on 13 February at 4:40 PM, the fourteenth highest daily dew point and the highest since 26.4 ºC in 2020 on 6 February at 9:02 AM.
Monthly highest dew point (for February): 24.9 ºC on 23 February 2021 at 1:20 PM. This is the fifth highest monthly maximum dew point on record for February, the lowest since 24.2 ºC in 2015 on 22 February at 3:58 PM, the thirteenth highest daily dew point on record for February and the highest since 21.2 ºC on 19 February 2019 at 5:25 PM.
Maximum Wind Gust: 50 km/hr on 14 December 2020 at 5:16 AM. This is the fifth lowest monthly December maximum wind gust on record, the lowest since 48 km/hr in 2018 on 21 December at 5:45 PM, the twentieth highest daily wind gust for December and the highest since 54 km/hr on 11 December 2019 at 10:07 PM. The maximum wind gust this month in 2019 and this season in 2019-20 was 54 km/hr. For summer this is the sixth lowest maximum seasonal wind gust, the lowest since 48 km/hr in 2019 on 21 December at 5:45 PM, the thirty-second highest daily maximum wind gust and the equal highest since 50 km/hr on 14 December 2020 at 5:16 AM.
Maximum Monthly Wind Gust (for January): 35 km/hr on 18 January 2021 at 9:29 AM. This is the lowest monthly January maximum wind gust on record exceeding the previous record low of 37 km/hr in 2019 on 27 January at 3:16 PM, the equal forty-second highest daily wind gust for January and the highest since 42 km/hr on 23 January 2020 at 11:35 AM.
Maximum Wind Speed: 21 km/hr on 7 December 2020 at 2:27 PM (Moderate Force Wind). This is the lowest monthly maximum wind speed for December on record, exceeding the previous record low of 25 km/hr in 2018 on 21 December at 5:45 PM, the fifth-first highest daily wind speed for December and the equal highest since 21 km/hr in 2019 on 24 December at 3:48 PM. This month in 2019 and this season in 2019-20 was 27 km/hr. For summer this is the lowest seasonal maximum wind speed on record, exceeding the previous record low of 25 km/hr in 2018-19 on 21 December at 5:45 PM, the equal ninety-third highest daily maximum wind speed and the highest since 33 km/hr in 2019 on 5 November at 1:45 PM.
Monthly Maximum Wind Speed (for January): 18 km/hr on 18 January 2020 at 6:23 PM (Moderate Force Wind). This is the lowest monthly maximum wind speed for January on record, exceeding the previous record low of 19 km/hr in 2019 on 27 January at 3:16 PM, the fifty-seventh highest daily wind speed for January and the equal highest since 24 km/hr in 2019 on 23 January at 11:45 AM.
Monthly Maximum Wind Speed (for February): 18 km/hr on 16 February 2021 at 5:45 PM (Light Force Wind). This is the lowest monthly maximum wind speed for February on record, exceeding the previous record low of 18.1 km/hr in 2012 on 20 February at 5:35 PM, the fifty-eighth highest daily wind speed for February and the highest since 19 km/hr in 2020 on 3 February at 4:05 PM.
Seasonal Wind Run: 9275.7 km (2142.7 km less than same season in 2019-20). This is the third highest on record and the lowest since 4230 km in 2017-18. This is 1706.1 km above average and 22.5 % above average.
Seasonal Mean Wind Speed: 4.3 km/hr (0.9 km/hr lower than this season in 2019-20, 0.2 km/hr below average and 4.6 % below average) and the third highest on record for summer and the lowest since 2.7 km/hr in 2015-2016.
Monthly Mean Wind Speed (for February): 1.8 km/hr (2.3 km/hr lower than this month in 2021), 2.1 km/hr below the long term average). This is the second lowest on record for February and the lowest since the current record low of 0.9 km/hr in 2012.
Daily Mean Maximum Wind Gust: 25.8 km/hr (2.3 km lower than this season in 2019-20), 1.7 km/hr above average and 6.6 % above average. This is the second lowest daily mean maximum wind gust for summer on record and the lowest since the current record low of 23.7 km/hr in 2011-12.
Daily Mean Maximum Wind Gust (for December): 28.1 km/hr (3.4 km/hr lower than this month in 2019), 0.9 km/hr above average and 3.9% above average. This is the fourth lowest daily mean maximum wind gust on record for December and the lowest since 26.3 km/hr in 2014.
Daily Mean Maximum Wind Gust (for January): 25.2 km/hr (3.3 km/hr lower than this month in 2020), 1.2 km/hr above average and 14.2% above average. This is the second lowest daily mean maximum wind gust on record for January and the lowest since 23.1 km/hr in 2012.
Daily Mean Maximum Wind Gust (for February): 24.1 km/hr (0.2 km/hr lower than this month in 2020), 0.1 km/hr above average and 0.2% above average. This is the second lowest daily mean maximum wind gust on record for February and the lowest since the current record low of 22.2 km/hr in 2012.
Daily Mean Maximum Wind Speed: 13.3 km/hr, 1.7 km/hr less than same season in 2019-20, 3.4 km/hr above average and 25.6 % above average. This is the second lowest daily mean maximum wind speed on record for summer and the lowest since the current record low of 13.2 km/hr in 2011-12.
Daily Mean Maximum Wind Speed (for December): 14.9 km/hr, 1.7 km/hr lower than this month in 2019), 3.7 km/hr above average and 4.4 % above average. This is the second lowest on record for December and lowest since the current record low of 14.7 km/hr in 2018.
Daily Mean Maximum Wind Speed (for January): 12.5 km/hr, 3.2 km/hr lower than this month in 2020), 3 km/hr above average and 37.7 % above average. This is the second lowest on record for January and lowest since the current record low of 12.4 km/hr in 2012.
Daily Mean Maximum Wind Speed (for November): 12.5 km/hr, 0.2 km/hr lower than this month in 2020), 2.7 km/hr above average and 27.5 % above average. This is the second lowest on record for February and lowest since the current record low of 10.1 km/hr in 2012.
Dominant Direction: SE (E this season in 2019-20).
Seasonal Rainfall Total: 367.9 mm (68.1 mm below average and 84.4% of the long term average), this season in 2019-20 was 628.5 mm. This is the sixteenth highest summer rainfall on record, the lowest since 131.1mm in 2017-18 and ranks as decile 5/ 42nd percentile and as average. Summer rainfall was 3.1 mm below the long-term median (99.2 % of long term median). Summer rainfall totals observed by the official sites in the Brisbane area were near average at most locations. The exception to this was Gatton that ranked historically as low with a total of 172 mm (56 % of the long term average) and recorded the lowest rainfall total of the main official sites. The remaining sites measured totals that were between 81 % of the long term average at Archerfield (332.6 mm) and 118 % of the long term average at Logan City Treatment Plant (470.2 mm). Brisbane observed a total of 358 mm which ranked as average (83% of the long term average). The highest total of the main official sites was 641.4 mm at Canungra and the highest of all the official sites was 792.8 mm at Mt Tamborine Fern St.
Number of Rain Days: 41 days, 1 less than same season in 2019-20 and 7.6 days above average. This is the eight highest on record for summer and the lowest since 35 days in 2018-19.
Number of Rain Days (0.1 mm or greater) for January: 19 days, 4 greater than same month in 2020 and 1.9 days below average. This is second highest on record for January and is the highest since 22 days in 2015.
Highest Daily Total: 70.1 mm on 14 December 2020. This is the fifth highest on record for December on monthly and daily basis and the highest since 82 mm in 1999 on 28 December. The highest daily total in the Brisbane area of all official sites was 140 mm at Peachester on the 14th. For summer this is the fourteenth lowest daily rainfall total on record, the lowest since 36 mm in 2018-19 on 17 December 2018, the thirty-fourth highest daily rainfall total and the highest since 93.9 mm on 7 February 2018. The highest daily total in the Brisbane area of all official sites in summer was 190.6 mm at Redland (Alexandra Hills) on 19 January 2021.
Wettest Month (December): 145.9 mm (16.7 mm above average) and 112.9% of the long-term average. This total is in decile 9/ 82nd percentile which ranks as high and 57.1 mm above the long-term median (161 % of long term median). This total is higher than this month in 2019 which was 56 mm, the seventh highest on record for December and the highest since the current record high of 450.1 mm in 2010. Most long period rainfall totals continue to remain below or well below average, that improved for many of these periods. As compared to the previous month the 6 monthly rainfall improved a little to 18.3 mm below average (decile 3). 9 monthly rainfall deteriorated from 171.9 mm above average to 52.7 mm below average (decile 6 to decile 3), while 12 month rainfall improved by 91 mm to 94.2 mm above average (decile 6). 18 month rainfall was 38 mm below average (decile 3) and improved by 100mm compared to the previous month. 24 monthly and 36 monthly rainfall improved a little from the previous month while remaining below average and was 366.1 mm below average (decile 3) and 203 mm (decile 4) respectively. 48 monthly rainfall deteriorated a little and was 156.7 mm below average (decile 5). Compared with the same period in the previous year most of these periods have improved, though some of the longer periods have not improved as much. The anomaly from the long term average for the 12 monthly rainfall have improved by 564 mm which was largest improvement of these periods compared with the same period in the previous year.
The official sites in the Brisbane area observed near or above average rainfall totals at most sites. The lowest rainfall total observed by the main official sites was 47 mm at Gatton, which was 48 % of the long-term average and ranked as low. Many sites ranked as average with totals that were between 75 % at Cape Moreton (94 mm) and 100 % of the long-term average at Brisbane Aero (120.2 mm). Several sites ranked historically as high and these were 169 mm at Archerfield (136 % of the long-term average), 158 mm at Beaudesert (138 % of the long term average) and 150.4 mm at Redcliffe (130 % of the long term average). A total of 241 mm at Beerburrum ranked as very high and was 155 % of the long-term average. The highest total of the main official sites was 258 mm at Logan City Treatment Plant which was 206 % of the long-term average and was the highest on record for December. The previous record high was 252.6 mm in December 1995. The highest rainfall total of all the official sites was 445.8 mm at Mt Tamborine. Brisbane observed a total of 127.2 mm which was 99 % of the long-term average and ranked as average.
Driest Month (January): 95.8 mm (4.2 mm above average) and 66.1% of the long-term average. This total is in decile 9/ 82nd percentile which ranks as average and 28.2 mm below the long-term median (75.8 % of long term median). This total is lower than this month in 2020 which was 183.3 mm, the fourteenth highest on record for January and the lowest since 62 mm in 2018. Most of the long period rainfall totals continue to remain below or well below average that reduced in January. As compared to the previous month the 6 monthly rainfall worsened a little to 74.7 mm below average (decile 4). 9 monthly rainfall dropped from 52.7 mm below average to 153.5 mm below average (decile 2), and 12 month rainfall remained in the positive but slipped by 86 mm to 8.2 mm above average (remaining at decile 6). 18 month deteriorated significantly from 529.5 mm above average (decile 8) to 150.4 mm below average (decile 3). 24 monthly rainfall improved from the previous month from 366.1 mm below average to 163.9 mm below average (remaining at decile 3), while 36 month rainfall fell significantly from 364 mm above average (decile 8) to 442.6 below average (decile 3). 48 monthly rainfall improved from 156.7 mm below average to 68.8 mm below average (decile 4). Compared with the same period in the previous year most of these periods have improved except for 36 month rainfall falling from 124.6 mm above average to 442.6 mm below average.
Most of the official sites in the Brisbane area observed near average or above average rainfall totals. The exception to this was Archerfield that observed the lowest fraction of the long term average of 45% and the lowest total of the main official sites of 60.6 mm. Many of the sites observed rainfall that historically ranked as average that were between 63% of the long term average at Brisbane with a total of 86.6 mm and 120 % of the long term average at Beaudesert (173.8 mm). Two sites observed totals that ranked historically as high being 132 % of the long term average at Amberley (152.6 mm) and 132 % of the long term average at Cape Moreton Lighthouse (193.8 mm). The highest rainfall total of all the official sites was 281.3 mm at Caloundra Airport.
February Monthly Rainfall: 126.2 mm (35.6 mm below average) and 78% of the long-term average. This total is in decile 5/ 41st percentile which ranks as average and 9.8 mm below the long-term median (82.1 % of long term median). This total is lower than this month in 2020 which was 389.2 mm, the thirteenth highest on record for February and the lowest since 39.8 mm in 2019. Many of the long period rainfall totals reduced as compared to the previous month and remained below or well below average. As compared with the previous month the 6 monthly rainfall reduced slightly by 20 mm to 94.7 mm below average (decile 6) and 9 monthly rainfall slipped by 45 mm to 108.6 mm below average (decile 3). 12 monthly rainfall was slightly above average in the previous month but fell to 256.4 mm below average (decile 3) in February. 18 month rainfall fell slightly to 167.8 mm below average while the 24 month, 36 month and 48 month rainfall totals mostly fell by a large amount and were at decile 3. The deficiencies compared to the long term average for 24 month rainfall fell from -163.9 mm to -312 mm, 36 month rainfall improved from -442.6 mm to -344.6 mm and 48 month rainfall fell from -68.8 mm to -360.3mm. Compared with the same period in 2020 rainfall deficiencies have deteriorated, in contrast to January where the rainfall totals were less deficient than in January 2020. When compared with the start of summer rainfall totals worsened for all periods except for 24 month rainfall that improved by 54 mm but was still well below average.
Most official sites in the Brisbane area observed close to average rainfall totals in February and was below average at some locations. The below average rainfall totals were measured at two locations, namely Cape Moreton Lighthouse (52 % of the long term average and a total of 80.6 mm) and Gatton (40% of the long term average and a total of 39.4 mm). The totals for these two sites ranked historically as low. The remaining sites saw totals that ranked historically as average which ranged between 55 % of the long term average at Amberley, with a total of 65.8 mm and 127 % of the long term average at Brisbane Aero with a total of 173.4 mm (and observed the highest total of all the main official sites). The highest total of all the official sites was 213.8 mm at Fort Lytton.
Seasonal Rainfall Total – (automatic gauge) 24 hours to 9am: 307.8 mm (60.1 mm less than official standard gauge and within 16.3 %). Highest daily total of automatic gauge, (24 hours to 9am): 57 mm on 14 December 2020, (24 hours from midnight): 41.4 mm on 14 December 2020.
Note: This automatic gauge for the season didn’t meet the expected accuracy (of +/- 10% of the standard gauge) of –16.3%. Note: The rain gauge saw monthly totals that were within 19.9 % in December, 8.4 % in January and 18.2 % in February.
There was 4 days with falls of at least 25 mm (5 less than same season in 2019) with 13 days of less than 1 mm (5 less than same season in 2019).
Highest rainfall rate was 145.8 mm/hr on the 16 January 2021 at 7:20 PM. This is the third highest monthly rainfall rate for January on record, the lowest since 48.6 mm/hr in 2019 on 7 January at 6:36 AM, the fourth highest daily maximum rain rate for January and the highest since 167 mm/hr on 19 January 2020 at 11:59 AM. For summer this is the fifth highest rainfall rate on record, the lowest since 104.7 mm in 2018-19 on 6 February at 11:48 PM, the eighth highest daily rainfall rate and the highest since 157.8 mm/hr on 9 February 2020 at 10:41 AM.
Monthly highest rainfall rate (for December) was 56.2 mm/hr on the 1 December 2020 at 3:48 PM. This is the third lowest monthly rainfall rate for December on record, the lowest since 55.2 mm/hr in 2012 on 10 December at 12:45 PM, the thirteenth highest daily maximum rain rate for December and the highest since 188.8 mm/hr on 24 December 2019 at 7:51 PM.
The highest hourly rainfall total was 27.6 mm on the 16 January 2021 at 7:49 PM. This is the fourth highest hourly rain for January on monthly and daily basis and the lowest since 2.8 mm in 2019 on 4 January at 1:20 AM. For summer this is the fifth lowest seasonal maximum hourly rainfall on record, the lowest since 8.2 mm in 2018-19 on 16 December at 5:05 AM, the seventh highest daily maximum hourly rainfall and the highest since 33.6 mm on 17 January 2020 at 11:14 PM.
December rainfall total was 145.9 mm and was above average being the highest in 10 years for December. The rainfall total was 112.9% of the long term average which ranked as high. Rainfall fell during 12 days which was 1.9 days below average. The official sites in the Brisbane area observed near or above average rainfall totals at most sites. In the Brisbane area there were large cumulative rainfall totals between the 12th and 18th with periods of very heavy rainfall due to the presence of a coastal trough and surface low pressure system off the coastline as well as an upper-level trough. The 7 days between the 12th to 18th brought around 90% of the monthly rainfall total at Brisbane. At Ferny Grove most rainfall occurred between the 7th and 18th during an active period of drizzle, showers, rain, and mild thunderstorms. The first 8 days of the month was dry and later in the month there were some drizzle and light showers on some days. The highest daily total rainfall on the 14th (70.1 mm – highest in 21 years) was a result of light to moderate rain from the evening of the 13th to early on the 14th.
Rainfall in January was close to average with a total of 95.8 mm which was 66.1% of the long term average and ranked as average. Rainfall was observed over 19 days which was 1.9 days below average. Most of the official sites in the Brisbane area observed near average or above average rainfall totals. In the Brisbane area were showers and thunderstorms in the first 10 days of the month as a result of surface troughs and moist onshore flow. On the evening of the 6th were thunderstorms with moderate to heavy falls, with some locations observing daily rainfall totals in excess of 70 mm in the 24 hours to 9am the next day. On the evening of the 18th were severe thunderstorms which brought heavy rainfall and flash flooding around some eastern suburbs. At Ferny Grove were showers, thunderstorms, and light rain in the first 10 days of the month. During the middle of the month were some thunderstorms with some moderate falls. A moderate to heavy shower in the evening of the 16th produced 8 mm in 6 minutes. During the rest of the month were light showers on many of these days.
In February there was 126.2 mm of rainfall and was close to average which was 78% of the long term average, ranked as average. Rainfall was observed on 14 days which was 2.2 days above average. Most official sites in the Brisbane area observed close to average rainfall totals in February and was below average at some locations. At the start of the month in the Brisbane area were thunderstorms and showers with most locations observing totals of 60 mm or more in the first 3 days of the month. During the middle of the month, from the 22nd to 25th and at the end of the month were thunderstorms and showers as a result of moist onshore flow and the passage of surface low pressure troughs. Thunderstorms on the evening of the 22nd extended from the southern interior into Brisbane, with small hail reported in Greater Brisbane. At Ferny Grove the first few days of the month saw showers with moderate to heavy falls before mostly light showers and rain until the middle of the month on some days. Further moderate to heavy falls from showers in the middle and later in the month along with some thunderstorm activity on the 19th, 22nd and 23rd.
Number of severe thunderstorms: 1
Number of thunderstorms: 10 (Mild: 10, Moderate: 2)
Number of thunder days: 14 days
Number of nearby only storms: 7
Severe thunderstorms in the Brisbane area:
December:
January:
The Bureau reported that:
“Widespread thunderstorms activity brought heavy falls to south-east Queensland on the 18th. Flash flooding occurred in and around suburbs of Alexandra Hills, Birkdale, Thornside, Capalaba, Upper Coomera, Willow Vale and Ormeau Hills. Redland (Alexandra Hills) reported 120 mm in one hour. The SES had around 205 requests for assistance, mainly around flash flooding. QFES responded to 12 swift water rescue incidents, mainly for vehicles driving through flooded roads.”
February:
NOTE: This is a summary of the aforementioned monthly and seasonal records exceeded over a monthly basis. Additionally, it lists records that are the lowest or highest in at least 5 years. See end notes for more information about record periods.
Record high December mean daily minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Seasonal average |
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20.8 |
21.1 in 2009 |
11 |
19.2 |
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Record low summer mean maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
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30.2 |
28.6 in 2012 |
11 |
30.2 |
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Record low December mean daily maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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30.3 |
=30.3 in 2015 |
11 |
30 |
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Record low January mean maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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30.3 |
28.7 in 2012 |
10 |
30 |
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Record low February mean maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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30.4 |
29.7 in 2015 |
11 |
30 |
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Record low summer mean temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
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25.3 |
25.1 in 2014 |
11 |
25.1 |
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Record low January mean temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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24.9 |
=24.9 in 2011 |
10 |
23.9 |
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Record high summer minimum temperature |
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Observed [C] |
Most recent higher |
Years of record |
Seasonal average |
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16.6 on 12th January at 4:49 AM |
= in 2009-10 on 3 December |
10 |
19.2 |
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Record high December daily minimum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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16.6 on 27th at 4:46 AM |
=16.6 in 2009 on 3rd |
11 |
19.2 |
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Record high January minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Monthly average |
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16.6 on 12th at 4:49 AM |
18.6 in 2010 on 29th |
10 |
19.4 |
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Record low summer maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
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36.6 on 16th January at 12:57 PM |
35.2 in 2011 on 21st February at 1:04 PM |
11 |
30.2 |
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Record low December daily maximum temperature at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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35.9 on 6th at 11:38 AM |
35 in 2015 on 11th at 1:30 PM |
11 |
30 |
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Record low February maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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36.1 on 7th at 1:12 PM |
35.2 in 2015 on 1st at 3:31 PM |
11 |
30 |
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Record low summer lowest daily maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
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20.9 on 12th December at 9:31 AM |
18.9 in 2011-12 on 7th December at 4:36 PM |
11 |
30.2 |
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Record low December lowest daily maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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20.9 on 12th at 9:31 AM |
18.9 in 2011 on 7th at 4:36 PM |
11 |
30 |
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Record low January daily maximum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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22.7 on 8th at 10:01 AM |
22.3 in 2012 on 17th at 1:20 PM |
10 |
23.9 |
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Record high summer highest daily minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Seasonal average |
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26.2 on 7th at 4:28 AM |
26.2 in 2019 on 28th November at 7:50 AM |
11 |
19.2 |
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Record high December highest daily minimum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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26.2 on 7th at 4:28 AM |
24.5 in 2012 on 18th at 4:00 AM |
11 |
19.2 |
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|
Record low February highest daily minimum temperature in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
23.1 on 28th at 5:45 AM |
22.1 in 2015 on 19th at 4:05 AM |
11 |
30 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February mean daily minimum MSL pressure |
|||||||||
Observed [hPa] |
Old record |
Years of record |
Monthly average |
||||||
1008.5 |
= 1008.5 |
11 |
1010.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean daily maximum MSL pressure in at least 5 years |
|||||||||
Observed [hPa] |
Most recent lower |
Years of record |
Seasonal average |
||||||
1014.1 |
1013.7 in 2011-12 |
10 |
1015.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February mean daily maximum MSL pressure |
|||||||||
Observed [hPa] |
Old record |
Years of record |
Monthly average |
||||||
1012.8 |
1013.3 in 2020 |
11 |
1014.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean MSL pressure in at least 5 years |
|||||||||
Observed [hPa] |
Most recent lower |
Years of record |
Seasonal average |
||||||
1011.9 |
1011.7 in 2012 |
10 |
1012.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February mean MSL pressure |
|||||||||
Observed [hPa] |
Old record |
Years of record |
Monthly average |
||||||
1010.7 |
1010.9 in 2020 |
11 |
1012.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December minimum MSL pressure in at least 5 years |
|||||||||
Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
||||||
1004.1 on 6th at 4:33 PM |
1005.9 in 2015 on 11th at 4:40 PM |
11 |
1011.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February daily maximum MSL pressure |
|||||||||
Observed [hPa] |
Old record |
Years of record |
Monthly average |
||||||
1017.1 on 18th at 10:13 AM |
1019.7 in 2014 on 9th at 8:06 AM |
11 |
1014.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high summer mean daily minimum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Seasonal average |
||||||
54.6 |
56.5 in 2014-15 |
10 |
52.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high December mean daily minimum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Monthly average |
||||||
54.4 |
56.7 in 2011 |
11 |
50.8 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high January mean daily minimum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Monthly average |
||||||
54.1 |
58.2 in 2015 |
10 |
52.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high summer mean daily maximum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Seasonal average |
||||||
93.3 |
93.9 in 2015 |
10 |
91.3 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high January mean daily maximum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Monthly average |
||||||
93.9 |
95.3 in 2015 |
10 |
91.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high summer mean relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Seasonal average |
||||||
73.9 |
75.2 in 2015 |
10 |
72.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high December mean relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Monthly average |
||||||
73.4 |
75.6 in 2011 |
11 |
70.8 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high January mean relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent higher |
Years of record |
Monthly average |
||||||
74 |
76.7 in 2015 |
10 |
72 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December mean daily minimum dew point |
|||||||||
Observed [C] |
Most recent higher |
Years of record |
Monthly average |
||||||
17.8 |
19.1 in 2010 |
10 |
17.6 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December mean daily maximum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
22.4 |
21.7 in 2017 |
11 |
20.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December mean dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent higher |
Years of record |
Monthly average |
||||||
20.1 |
=20.1 in 2010 |
11 |
18.6 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February daily maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
24.9 on 23rd at 1:20 PM |
24.2 in 2015 on 22nd at 3:58 PM |
11 |
21.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low January maximum daily wind gust |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
35 on 18th at 9:29 AM |
37 in 2019 on 27th at 3:16 PM |
9 |
24 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer and December highest wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Seasonal/ monthly average |
||||||
21 on 7th at 2:27 PM |
25 in 2018 on 21st December at 5:45 PM |
10 |
9.9/10.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low January maximum daily wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
18 on 18th at 623 PM |
19 in 2019 on 27th at 3:16 PM |
9 |
9.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February daily maximum wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
18 on 16th at 5:45 PM |
18.1 in 2012 on 20th at 5:35 PM |
10 |
7.4 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Seasonal average |
||||||
4.3 |
2.7 in 2015-16 |
7 |
4.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
1.8 |
0.9 in 2012 |
10 |
3.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer daily mean maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Seasonal average |
||||||
25.8 |
23.7 in 2011-12 |
9 |
24.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
28.1 |
26.3 in 2014 |
10 |
24.2 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low January mean daily wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
25.2 |
23.1 in 2012 |
9 |
24 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February mean daily wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
24.1 |
22.2 in 2012 |
11 |
24 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer daily mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Seasonal average |
||||||
13.3 |
13.2 in 2011-12 |
9 |
10 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low January mean daily wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.5 |
12.4 |
9 |
9.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December total rainfall in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Monthly average |
||||||
145.9 |
450.1 in 2010 |
9 |
129.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high January number of rain days in at least 5 years |
|||||||||
Observed [days] |
Most recent higher |
Years of record |
Monthly average |
||||||
19 |
22 in 2015 |
33 |
17.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December highest daily rainfall total in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Monthly average |
||||||
70.1 on 14th |
82 in 1999 on 28th |
33 |
41.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low December maximum rainfall rate in at least 5 years |
|||||||||
Observed [mm/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
56.2 on 1st at 3:48 PM |
55.2 in 2012 on 10th at 12:45 PM |
33 |
89.1 |
||||||
|
|
|
|
|
|
|
|
|
|
NOTE: These records are drawn from automatic data record for this site. See end notes for more information.
All time records |
No records |
Monthly records |
December |
No records |
January |
No records |
February |
No records |
Summary of Averages and Extremes for summer 2020-21 for Ferny Grove, Brisbane, Queensland, Australia |
|
|
|
|
||||||||||||
|
Min Temp |
Max Temp |
Mean Temp |
Temp Range |
Min Grass Temp |
Min Grass Temp Depression |
Min Relative Humidity |
Max Relative Humidity |
Mean Relative Humidity |
Min MSL pressure |
Max MSL Pressure |
Mean MSL Pressure |
Dew Point |
Max Wind Gust |
Max Wind Speed |
Daily rain |
December |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.8 |
30.3 |
25.6 |
9.6 |
19.1 |
1.7 |
54.4 |
92.5 |
73.4 |
1010.2 |
1015.0 |
1012.6 |
20.1 |
28.1 |
14.9 |
4.7 |
Min |
16.6 |
20.9 |
18.8 |
2.6 |
13.8 |
-2.4 |
19 |
81 |
54.5 |
1004.1 |
1009.3 |
1006.8 |
4.9 |
19.0 |
9.0 |
|
Max |
26.2 |
35.9 |
30.7 |
14.9 |
21.9 |
4.3 |
88 |
99 |
93.5 |
1016.6 |
1020.9 |
1018.7 |
25.5 |
50.0 |
21.0 |
70.1 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
145.9 |
January |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.0 |
29.9 |
24.9 |
9.9 |
18.2 |
1.7 |
54.1 |
93.9 |
74.0 |
1010.3 |
1014.3 |
1012.3 |
19.7 |
25.2 |
12.5 |
3.1 |
Min |
16.6 |
22.7 |
21.3 |
2.5 |
13.2 |
0.3 |
39 |
86 |
66.0 |
1005.1 |
1009.9 |
1007.8 |
14.4 |
17.0 |
9.0 |
|
Max |
22.3 |
36.6 |
29.4 |
14.4 |
21.0 |
3.4 |
72 |
98 |
83.5 |
1015.1 |
1019.2 |
1017.2 |
24.9 |
35.0 |
18.0 |
30.1 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
95.8 |
February |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.3 |
30.4 |
25.3 |
10.1 |
18.1 |
2.1 |
55.2 |
93.5 |
74.3 |
1008.5 |
1012.8 |
1010.7 |
20.2 |
24.1 |
12.5 |
4.5 |
Min |
17.3 |
26.0 |
22.8 |
5.5 |
14.0 |
0.6 |
37 |
82 |
64.5 |
1000.8 |
1007.0 |
1004.4 |
14.1 |
12.0 |
7.0 |
|
Max |
23.1 |
36.1 |
28.6 |
15.3 |
21.0 |
4.1 |
83 |
98 |
90.5 |
1014.1 |
1017.1 |
1015.6 |
24.9 |
39.0 |
18.0 |
33.5 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
126.2 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.3 |
30.2 |
25.3 |
9.9 |
18.5 |
1.9 |
54.6 |
93.3 |
73.9 |
1009.7 |
1014.1 |
1011.9 |
20.0 |
25.8 |
13.3 |
4.1 |
Min |
16.6 |
20.9 |
18.8 |
2.5 |
13.2 |
-2.4 |
19 |
81 |
54.5 |
1000.8 |
1007.0 |
1004.4 |
4.9 |
12.0 |
7.0 |
|
Max |
26.2 |
36.6 |
30.7 |
15.3 |
21.9 |
4.3 |
88 |
99 |
93.5 |
1016.6 |
1020.9 |
1018.7 |
25.5 |
50.0 |
21.0 |
70.1 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
367.9 |
Summary for summer 2020-21 from long term average for Ferny Grove, Brisbane, Queensland, Australia |
||||||||
|
Temperature |
Relative Humidity |
MSL Pressure |
Dew Point |
Wind Gust |
Wind Speed |
Rainfall |
Rainfall as Fraction of monthly average (%) |
December |
|
|
|
|
|
|
|
|
Average |
+1.0 |
+2.6 |
-0.8 |
1.5 |
+3.9 |
+4.4 |
+16.7 |
112.9 |
Min |
+1.6 |
+3.5 |
|
1.3 |
|
|
|
|
Max |
+0.3 |
+1.6 |
|
1.6 |
|
|
+104.1 |
|
January |
|
|
|
|
|
|
|
|
Average |
-0.7 |
+2.0 |
-0.1 |
-0.3 |
+1.2 |
+3.0 |
-49.2 |
66.1 |
Min |
-0.6 |
+1.2 |
|
-0.5 |
|
|
|
|
Max |
-0.8 |
+2.8 |
|
-0.0 |
|
|
+40.7 |
|
February |
|
|
|
|
|
|
|
|
Average |
+0.2 |
+1.0 |
-2.2 |
+0.2 |
+0.1 |
+2.7 |
-35.6 |
78.0 |
Min |
-0.0 |
+0.4 |
|
-0.2 |
|
|
|
|
Max |
+0.4 |
+1.5 |
|
+0.5 |
|
|
61.0 |
|
Season |
|
|
|
|
|
|
|
|
Average |
+0.2 |
+1.8 |
-1.0 |
+0.5 |
+1.7 |
+3.4 |
-68.1 |
84.4 |
Min |
+0.3 |
+1.7 |
- |
+0.2 |
- |
- |
- |
- |
Max |
-0.0 |
+2.0 |
- |
+0.7 |
- |
- |
- |
- |
Monthly averages and extremes for summer 2020-21 to Date for Ferny Grove, Brisbane, Queensland, Australia |
|||||||||||
|
Temperature |
Temperature from Long Term Avg. |
Rain total |
Rain Anomaly |
Rain days |
||||||
|
Avg Min |
Avg Max |
Low Min |
High Max |
Average |
Min |
Max |
Average |
|
|
|
Dec-20 |
20.8 |
30.3 |
16.6 |
35.9 |
25.6 |
+1.6 |
+0.3 |
+1.0 |
145.9 |
16.7 |
12 |
Jan-21 |
20.0 |
29.9 |
16.6 |
36.6 |
24.9 |
-0.6 |
-0.8 |
-0.7 |
95.8 |
-49.2 |
15 |
Feb-21 |
20.3 |
30.4 |
17.3 |
36.1 |
25.3 |
-0.0 |
+0.4 |
+0.2 |
126.2 |
-35.6 |
14 |
Season |
20.3 |
30.2 |
16.6 |
35.9 |
25.3 |
+0.3 |
-0.0 |
+0.2 |
367.9 |
-68.1 |
41 |
Notes:
Based on Bureau of Meteorology Climate summaries (Copyright) of which some data was obtained from. From September 2017 the Bureau of Meteorology Climate summaries were expanded to provide data from official stations in and near the Greater Brisbane “Greater capital city Statistical Area” (GCCSA).
Data Copyright Ferny Grove Weather 2019, Produced 7/9/21. Data Checking has been carried out but errors may still be present and therefore there is no assurance of correctness. Corrections may be made at a later data if errors or deficiencies are found and/or improvements in data handling techniques are made, though data with major improvements may not be updated in this summary. Data measured with professional moderate accuracy equipment. This replaced non professional equipment of low accuracy with differences in the measured data. The new equipment measures the daily average wind speed and wind run about 40 % higher. Daily rainfall and grass minimum temperature is measured using non-professional equipment of moderate accuracy.
Site Commencement data is April 15 2009 except for daily rainfall which commenced on January 1 1987. Not all variables have been measured over the entire station record. Most variables are measured over a 24 hour period ending in the evening and over a 24 hour period from midnight effective October 5 2018. Maximum temperatures are measured over the 24 hours from 9 am on the day of measurement. Minimum temperatures are measured over the 24 hours to 9 am of the day of measurement. Rainfall is measured over 24 hours to 9am and recorded on that day. This is the same as the official time standard. Some rainfall measurements are not made at 9am and is adjusted based on the automatic record. Minimum Grass Temperature is measured over an approx. 12 hour period ending in the early morning. MSL refers to Mean Sea Level, which is the standard meteorological method of measuring air pressure reduced to sea level based on both elevation and temperature. Grass Minimum Depression is the difference of the grass minimum temperature from the air temperatures and is a positive value when the grass temperature is below the air temperature.
Up until March 9 2019 automatic records as Dew Point, Average Wind Speed, Dominant Wind Direction, Wind Run, Rain Rate and Hourly Rain are measured over a 24 hour period starting at midnight and recorded for that day. This started on the 6 October 2011. The automatic record is used for some data and also may be used if data is not available/ not suitable. From March 9 2019 the automatic record became the official record instead, simplifying this process. Until replaced on 5 October 2018 the temperature and humidity sensor is under exposed so minimum temperature and maximum humidity are incorrect and low accuracy rain gauge is used which are not used as the site’s official record. This data limitation does not apply to other measurements of temperatures, air pressure and humidity, wind gust, daily and monthly rainfall and rain days elsewhere in this summary which are recorded separately and form the official record for this site. The replacement equipment is sited in more exposed locations and therefore the limitations don’t apply, though the automatic daily rainfall doesn’t form the official data for the site.
Long term averages are based on all available long period past measurements from October 2019 whilst for non automatic rainfall is based on 1987 to 2017 average from the station record, while. Prior to this the long term average for Temperature, Relative Humidity and Air pressure is based on 2009 to 2015 average from the station record and wind speed is based on the 2010 to 2018 average from station record. Wind Run is 2011 to 2018 and Rain Rate and High Hourly Rain is 2011 to 2017.
The Fraction of monthly average expresses how much has fallen in respect to the long term average listed as a percentage. The decile ranking compares the rainfall total to the historical record for the site where the record is divided into 10 equal groups. Decile 1 is the lowest 10% of the record (10th percentile) and Decile 10 (90th percentile) is the highest 10% of the record. Decile 1 is considered “very low”, decile 2 and 3 “low”, decile 4 to 7 “average”, decile 8 and 9 “high” and decile 10 “very high”.