In autumn at Ferny Grove overnight temperatures were close to average, whilst daytime temperatures were above average. In the Brisbane area the official sites observed close to average minimum temperatures at most of the sites. The maximum temperatures were close to average at most of the sites, whilst the inland sites observed above average maximum temperatures. Rainfall was below average at Ferny Grove (37 % of the long-term median) and was the lowest autumn rainfall total since 2016. All the official sites in the Brisbane area also observed below average rainfall totals. In autumn at Ferny Grove air pressure was above average, with below average mean, well below average mean minimum and close to average mean maximum relative humidity, below average mean and mean minimum dew point, mean maximum dew point was close to average, above average wind speed and there were 2 thunderstorms (2 thunder days).
Seasonal Mean Daily Minimum Temperature: 15.8 ºC, 0.1 ºC below average and 0.8 ºC lower than the same season in 2019. This is the fifth lowest seasonal minimum temperature on record for autumn and the lowest since 15.6 ºC in 2018. In autumn mean minimum temperatures observed by the official sites in the Brisbane area were close to average at all but one site. This sole site measured a mean minimum temperature that was 13.4 ºC at Amberley (0.5 ºC below average). The other sites observed anomalies from the long term average that were close to average of between 0.3 ºC below average at Beerburrum, with a mean minimum temperature of 15.4 ºC and 0.4 ºC above average at Cape Moreton Lighthouse that observed a mean minimum temperature of 19.4 ºC and was the also the highest mean minimum temperature of all these sites. The lowest mean minimum temperature observed was 12 ºC at Canungra. Brisbane observed a mean minimum temperature of 17.3 ºC (0.2 ºC above average).
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Lowest Monthly Mean Daily Minimum Temperature (May): 12.7 ºC, 0.2 ºC above average and 0.4 ºC lower than same month in 2019. This is the sixth highest and lowest on record for May and the lowest since 11.5 ºC in 2018. In the Brisbane area many sites observed below average mean minimum temperatures mostly at the inland sites and close to average at the remaining sites. Many of the sites measuring close to average mean minimum temperatures expressed negative anomalies. Brisbane (13.8 ºC) and Brisbane Aero (13.0 ºC) equalled the long-term average and Beaudesert was 0.1 ºC above average (9.6 ºC) which was the highest observed anomaly from the long-term average. The highest mean minimum temperature was 14.3 ºC at Redcliffe (0.1 ºC below average). The lowest mean minimum temperature was 7.7 ºC at Canungra, while the greatest below average was 1.4 ºC below average at Amberley (8.6 ºC). The other sites measuring below average mean minimum temperatures were Archerfield with a mean minimum temperature of 11.2 ºC (0.7 ºC below average) and Beerburrum (0.7 ºC below average) with a mean minimum temperature of 12 ºC.
Highest Monthly Mean Daily Minimum Temperature (March): 18.7 ºC, 0.6 ºC below average and 1.7 ºC lower than same month in 2019. This is the fourth lowest on record for March and the lowest since 18.6 ºC in 2014. All of the official sites in the Brisbane area observed close to average mean minimum temperatures. All of the sites measured mean minimum temperatures that ranged between 0.5 ºC below average at Beaudesert (17.4 ºC) and Redcliffe (20.3 ºC) and 0.1 ºC above average at Archerfield (18.6 ºC) and Cape Moreton Lighthouse (21.3 ºC). The highest mean minimum temperature was observed was 21.3 ºC at Cape Moreton Lighthouse (0.1 ºC above average) whilst the lowest mean minimum temperature was 17.2 ºC at Gatton (0.1 ºC below average). Brisbane observed a mean minimum temperature of 20.1 ºC (0.1 ºC below average).
Monthly Mean Minimum Daily Temperature for April: 16 ºC, equal to the long term average and 0.4 ºC lower than same month in 2019. This is the equal fifth highest and lowest on record for April and the equal lowest since 16 ºC in 2018. Most of the official sites in the Brisbane saw close to average mean minimum temperatures, with most of these observing positive anomalies from the long term average. Some coastal sites measured above average mean minimum temperatures, which was 0.7 ºC above average at Brisbane Aero (mean minimum temperature of 17.2 ºC), 0.6 ºC above average at Logan City Treatment Plant (16.7 ºC) and 0.5 ºC above average at Point Lookout (20.1 ºC). Cape Moreton Lighthouse measured the highest anomaly at 1.5 ºC above average and highest mean minimum temperature of all the sites at 20.7 ºC. The remaining sites saw close to average mean minimum temperatures between 0.2 ºC below average at Amberley and 0.5 ºC above average at Brisbane (17.9 ºC) and 20.1 ºC at Point Lookout. The lowest mean minimum temperature was 12.1 ºC at Canungra.
Seasonal Mean Daily Maximum Temperature: 27.5 ºC, 1.1 ºC above average and 0.1 ºC lower than the same season in 2019. This is the third highest on record and the lowest since 27.4 ºC in 2018. The official sites in the Brisbane area saw close to average mean maximum temperatures for most of the sites, whilst the inland sites observed above average mean maximum temperatures that were up to 1 ºC above average. Only one site measured a mean maximum temperature that was less than the long term average, being 0.1 ºC below average at Beerburrum with a mean maximum temperature of 26.3 ºC. The sites measuring close to average mean maximum temperatures observed anomalies that were between 0.1 ºC above average at Brisbane (27.1 ºC) and 0.5 ºC above average at Logan City Treatment Plant (26.8 ºC). The lowest mean maximum temperature was 24.7 ºC at Cape Moreton Lighthouse (0.6 ºC above average). The inland sites observing above average mean maximum temperatures were between 0.6 ºC at Beaudesert (27.4 ºC) and 1 ºC above average at Gatton (27.8 ºC and was the highest mean maximum temperature of all these sites).
Lowest Monthly Mean Daily Maximum Temperature (May): 24.2 ºC, equal to long term average and 0.1 ºC higher than same month in 2019. This is the fourth highest on record for May and the highest since 25.1 ºC in 2018. Most of the official sites in the Brisbane area observed near average mean maximum temperatures with the anomalies from the long-term average mostly between 0.1 ºC and 0.3 ºC below average. 2 sites observed below average mean minimum temperatures that were 0.8 ºC below average at Beerburrum (23.3 ºC) and 0.6 ºC below average at Brisbane (24.0 ºC). The lowest mean maximum temperature was 21.6 ºC at Cape Moreton Lighthouse (0.3 ºC below average). The highest mean maximum temperature was also close to average being 24.4 ºC (0.3 ºC below average). Two of the sites observed mean maximum temperatures were higher than the long-term average at 0.3 ºC above average at Amberley (24.4 ºC) and 0.2 ºC above average at Archerfield (24.2 ºC).
Highest Monthly Mean Daily Maximum Temperature (April): 29.1 ºC, 2.7 ºC above average and 2.4 ºC higher than same month in 2019. This is the highest on record for April on record exceeding the previous record high of 28.9 ºC in 2016. All of the official sites measured above average mean maximum temperatures and the inland sites measured temperatures that were 2 ºC above average. The highest mean maximum temperature was 29.8 ºC at Gatton and observed the highest anomaly from the long term average of 2.6 ºC above average. The other inland sites measuring well above average mean maximum temperatures were 2.2 ºC above average at Amberley (29.4 ºC), Archerfield at 2.4 ºC above average (29 ºC) and 2.5 ºC above average at Beaudesert (29.3 ºC). The remaining sites measured mean maximum temperatures that were between 0.8 ºC above average at Point Lookout (27.2 ºC) and 1.9 ºC above average at Logan City Treatment Plant (28.3 ºC). The lowest mean maximum temperature was 26.1 ºC at Cape Moreton Lighthouse (1.8 ºC above average). Brisbane observed a mean maximum temperature of 28.7 ºC (1.6 ºC above average). Logan City Treatment Plant measured a new record high mean maximum temperature for April exceeding the old record by 0.2 ºC in 2016. Brisbane Aero measured a new record exceeding the previous record in 2016 by 0.1 ºC.
Monthly Mean Maximum Daily Temperature for March: 29.1 ºC, 0.5 ºC above average and 2.3 ºC lower than same month in 2019. This is the fifth highest on record for March and the lowest since 28.9 ºC in 2018. Mean maximum temperatures as measured by the official sites in the Brisbane area were close to average at most sites and most of these sites exhibited a negative anomaly. The lowest anomaly was 0.5 ºC below average at Beaudesert (28.8 ºC) and Brisbane (28.7 ºC). Sites that were above the long term average was 0.1 ºC above average at Archerfield (29 ºC), and 0.4 ºC above average at Cape Moreton Lighthouse (26.5 ºC). Gatton observed the highest mean maximum temperature of all the sites at 29.5 ºC (0.1 ºC below average) and the lowest mean maximum temperature was 26.5 ºC at Cape Moreton (0.4 ºC above average). Brisbane observed a mean maximum temperature of 28.7 (0.5 ºC below average).
Seasonal Mean Temperature: 21.6 ºC, 0.5 ºC above average and 0.5 ºC lower than same season in 2019. This is the fifth highest on record and the lowest since 21.5 ºC in 2018.
Lowest Mean Monthly Temperature (May): 18.4 ºC, 0.1 ºC above average, 0.5 ºC lower than same month in 2019. This is the fifth highest on record for May and the lowest since 17.3 ºC in 2018.
Highest Mean Monthly Temperature (March): 23.9 ºC, equal to long term average and 2 ºC lower than same month in 2019. This is the fifth lowest on record for March and the lowest since 23.8 ºC in 2014.
Mean Monthly Temperature (April): 22.6 ºC, 1.4 ºC above average, 1 ºC higher than same month in 2019. This is the second highest on record for April and the highest since the current record high of 22.7 ºC in 2016.
Lowest Temperature: 9.1 ºC on 4 May 2020 at 3:28 AM. Same month and season in 2019 was 4.4 ºC. This is the highest monthly minimum temperature for May on record, exceeding the previous record high of 9 ºC in 2017 on 31 May at 7:09 AM, the twenty second lowest daily minimum temperature and the lowest since 4.4 ºC on 31 May 2019 at 6:14 AM. For autumn this is the highest seasonal minimum temperature on record, exceeding the previous record high of 9 ºC in 2017 on 31 May at 7:09 AM, the twenty-third lowest daily autumn minimum temperature and the lowest since 4.4 ºC on 31 May 2019 at 6:14 AM. Official stations in the Brisbane area observed the lowest temperature of the month at many sites on the 24th and at some sites on the 2nd, 4th, 12th, 25th and 26th. The lowest was 0.6 ºC at Beaudesert on the 24th and the highest was 10.8 ºC at Cape Moreton Lighthouse on the 24th. The lowest temperature at Brisbane was 10.2 ºC on the 26th. In the Brisbane area during some days at the start of the month were cool nights, then some during the middle of the month mainly at the inland sites before cooler nights during the end of the month and especially between the 23rd and 27th. The lowest temperature for the season of the official sites ranged between 0.6 ºC at Beaudesert on 24 May 2020 and 10.8 ºC at Cape Moreton Lighthouse on 24 May 2020. The lowest observed temperature at Brisbane in autumn was 10.2 ºC on 26 May 2020.
Highest Temperature: 35.2 ºC on 2 March 2020 at 2:33 PM. The same month in 2019 was 36.7 ºC and the same season in 2019 was 41.1 ºC. This is the fifth highest monthly maximum temperature for March on record, the lowest since 32.7 ºC in 2016 on 19 March at 12:35 PM, the eighth highest daily maximum temperature for March and the highest since 35.9 ºC on 24 March 2019 at 1:55 PM. For autumn this is the fifth seasonal maximum temperature on record, the highest since 32.7 ºC in 2016 on 19 March at 12:35 PM, the eighth highest daily maximum temperature and the highest since 35.9 ºC on 24 March 2019 at 1:55 PM. The official sites measured the highest temperature for the month on the 1st and the 2nd. The lowest was 30 ºC at Cape Moreton Lighthouse on the 3rd and the highest was 35.2 ºC at Gatton on the 2nd. The highest temperature observed at Brisbane was 33.4 ºC on the 2nd. Warm days were experienced in the first week of the month in the Brisbane area and returned briefly on the 21st and 22nd and in the last few days of the month. The highest temperature for the season of the official sites ranged between 30 ºC at Cape Moreton Lighthouse on 3 March 2020 and 35.8 ºC at Greenbank on 2 March 2020. The highest observed temperature at Brisbane during autumn was 33.6 ºC on 17 April 2020.
Monthly Highest Temperature (for April): 34.2 ºC on 17 April 2020 at 3:19 PM. The same month in 2019 was 30.5 ºC. This is the highest maximum daily temperature for April on record, exceeding the previous record high of 33.1 ºC in 2018 on 15 April at 2:09 PM. The official sites measured the highest temperature for the month on the 17th at many sites and at some sites on the 2nd, 4th and 11th. The lowest was 27.9 ºC at Cape Moreton Lighthouse on the 4th and the highest was 35.1 ºC at Gatton on the 17th. The highest temperature observed at Brisbane was 33.6 ºC on the 17th. Above average temperatures were observed during many days of the month. Logan City Treatment Plant observed its highest temperature for April for the past 28 years of 33.8 ºC exceeding the previous record of 33.4 ºC in 2006.
Lowest Maximum Temperature: 15.6 ºC on 23 May 2020 at 8:55 AM. This is the lowest monthly maximum daily temperature for May on record, exceeding the previous record low of 17.7 ºC in 2013 on 16 May at 12:20 AM. This month in 2019 was 28.0 ºC and this season in 2019 was 20.6 ºC. For autumn this is the lowest seasonal and daily lowest maximum temperature on record, exceeding the previous record low of 17.7 ºC in 2013 on 16 May at 12:20 AM. All of the official sites measured the coolest day of the month on the 23rd from a cold day on the 22nd under a cold southerly airstream. These ranged between 14.8 ºC at Canungra and 16.3 ºC at Beaudesert. In the Brisbane area cool days were observed in the first few days of the month, returned during some days during the middle of the month for the coastal sites before cool to cold days between the 21st and 24th. At the end of the month were some cool nights at some sites. On the 23rd many sites observed new records for the lowest maximum temperature for May on record exceeding previous record lows by at least 1 ºC occurring at locations such as the island sites, Brisbane, Logan City Treatment Plant, Archerfield and Brisbane. For autumn, the lowest observed maximum temperature at Brisbane was 15.1 ºC on 23 May 2020 and for all of the official sites this was 13.5 ºC at Cape Moreton Lighthouse on 23 May 2020. Many of the official sites observed new records on the 23 May for the lowest autumn daily maximum temperature at locations such as Brisbane, Archerfield and Cape Moreton Lighthouse.
Lowest Daily Maximum Temperature (for March): 20.9 ºC on 9 March 2020 at 9:00 AM. This is the lowest monthly lowest maximum daily temperature for March on record, exceeding the previous record low of 21.9 ºC in 2019 on 27 March at 12:40 PM. This month in 2019 was 21.0 ºC. Most of the official stations in the Brisbane area measured the coolest day on 9th and at Cape Moreton Lighthouse on the 27th. These ranged between 21.3 ºC at Logan City Treatment on 9th and 23.8 ºC at Cape Moreton Lighthouse on the 27th. In the Brisbane area cool days were experienced between the 8th and 18th and between the 23rd and 28th during periods of cloud cover and rainfall. The lowest maximum temperature at Brisbane was 21.9 ºC on the 9th and this was lowest on record for March at the current site exceeding the previous record of 22.8 ºC in 2019 on the 27th. It is higher than the record high for the old site of 19.2 ºC in 1921. Beerburrum equalled the current March record of 21.4 ºC as measured on the 27th in 2019 with the lowest daily maximum temperature measured on the 9th.
Lowest Daily Maximum Temperature (For April): 24.7 ºC on 19 April 2020 at 3:12 PM. This is the second highest monthly lowest maximum daily temperature for April on record, the highest since current record high of 24.8 ºC in 2016, the equal twenty-fifth lowest daily minimum temperature for April and the lowest since 23.6 ºC on 30 April 2019 at 9:58 AM. This month in 2019 was 23.3 ºC. Many of the official sites measured the coolest day of the month on 19th and at some sites on the 10th, 13th and 18th. These ranged between 22.8 ºC at Beerburrum on the 8th and Point Lookout on the 19th. In the Brisbane area cool days were observed during a very low number of days mostly during the middle of the month. The lowest maximum temperature at Brisbane was 25.3 ºC on the 19th.
Highest Daily Minimum Temperature: 24.4 ºC on 6 March 2020 at 3:50 AM. This is the highest monthly March highest daily minimum temperature on record, exceeding the previous record high of 24.2 ºC in 2015 on 26 March at 6:20 AM. This month in 2019 was 22.9 ºC and this season in 2019 was 22.9 ºC. For autumn this is the highest seasonal and daily minimum temperature, exceeding the previous record high of 24.2 ºC in 2015 on 26 March at 6:20 AM. In March most warm nights occurred in the first 9 days of the month. Nights were close to average or below average during the rest of the month except for some warm nights on the 22nd to 25th. In the Brisbane area the warmest nights occurred on the 6th and at some sites on the 5th and 7th. These ranged between 23.4 ºC at Gatton on the 5th and 25.8 ºC at Point Lookout on the 6th. The highest minimum temperature measured at Brisbane was 25.6 ºC on the 6th which was the highest on record for March exceeding the old record of 25 ºC in 2001 on the 26th. Point Lookout measured 25.8 ºC, which was the highest for March exceeding the previous record of 25.7 ºC in 2011 on the 3rd. Brisbane’s highest minimum temperature observed during autumn was 25.6 ºC on 6 March 2020 and for all the official sites this was 25.8 ºC on 6 March 2020. On the 6 March Brisbane and Point Lookout observed the warmest daily minimum temperature for autumn since 2001 and 2011 respectively.
Highest Daily Minimum Temperature (for May): 15.6 ºC on 21 May 2020 at 1:55 AM. This is the lowest monthly May highest daily minimum temperature on record, exceeding the previous record low of 16.2 ºC in 2015 on 18 May at 6:10 AM. This month in 2019 was 19.4 ºC. In the Brisbane area the warmest night occurred at many sites on 21st and at some sites on the 9th, 10th and 18th. These ranged between 13.5 ºC at Amberley on the 21st and 20 ºC at Cape Moreton Lighthouse. The highest minimum temperature measured at Brisbane was 16.6 ºC on the 21st. Warm nights were scattered throughout the month occurring especially during the middle of the month.
Seasonal Average Minimum Grass Temperature: 14.3 ºC (0.9 ºC lower than same season in 2019)
Lowest Seasonal Minimum Grass Temperature: 6.8 ºC on 24 May 2020 (5 ºC higher than same month in 2019). This coincided with the lowest minimum air temperature of 11.9 ºC for the month.
Highest Seasonal Minimum Grass Temperature: 22.8 ºC on 6 March 2020 (1 ºC higher than same month in 2019). This coincided with the highest minimum air temperature of 24.4 ºC for the month.
Highest Minimum Grass Temperature Depression: 3.1 ºC on 24 May 2020 with a minimum grass temperature of 6.8 ºC and an air temperature of 9.9 ºC.
Lowest Minimum Grass Temperature Depression: 0.2 ºC on 27 March 2020 with a minimum grass temperature of 17.5 ºC and an air temperature of 17.7 ºC.
In March minimum temperatures saw above average minimum temperatures in the first week before below average temperatures during two periods during the rest of the month interspersed by a short period of warmer temperatures. The 4th to 8th was 2 ºC to 3 ºC above average during the warm spell at the start of the month. The cool spells saw temperatures that were between 1 ºC and 4 ºC below average.
April minimum temperatures saw a mixture of above average and below average temperatures. Most warm nights occurred during the first 11 days of the month, with several nights that were between 3 ºC and 5 ºC above average. A cooler spell followed between the 13th and 17th of 1 ºC to 3 ºC below average temperatures. The 18th was 4 ºC above average before reverting back to near average or below average during most nights for the remainder of the month. It was 4 ºC below average on the 21st and otherwise relatively close to average during this time. The 28th was 2 ºC above average before returning to near average at the end of the month.
Observed minimum temperatures in May were both below and above average throughout the month with many nights close to average. Most of the first 11 nights were slightly cool or warm with some warm nights, followed by a mixture of warm and cool nights for the following nights. The 16th to 21st was a warm period with temperatures of 1 ºC to 3 ºC above average followed by a cool period between the 22nd and 27th of 1 ºC to 3 ºC below average. The remainder of the moth was slightly warm or cool.
Maximum temperatures in March saw below average temperatures during some days in the middle of the month and later in the month. There were above average maximum temperatures in the first week and some short spells in the second half of the month. The first week saw a 7 day period of above average temperatures that were between 2 ºC and 7 ºC above average. A 10 day period of cooler temperatures followed from the 10th with some days of relatively close to the long term average and as much as 4 ºC below average. A 3 day warm spell followed from the 20th of 2 ºC to 5 ºC above average. The remainder of the month saw close to average or below average temperatures.
April minimum temperatures saw a mixture of above average and below average temperatures. Most warm nights occurred during the first 11 days of the month, with several nights that were between 3 ºC and 5 ºC above average. A cooler spell followed between the 13th and 17th of 1 ºC to 3 ºC below average temperatures. The 18th was 4 ºC above average before reverting back to near average or below average during most nights for the remainder of the month. It was 4 ºC below average on the 21st and otherwise relatively close to average during this time. The 28th was 2 ºC above average before returning to near average at the end of the month.
Maximum temperatures in May were generally above average, with some days close to average. There were however some cool to cold days during the month, mostly between the 20th and 24th. The first 11 days generally saw slightly warm days after the first two days were close to average, peaking at 4 ºC above average on the 9th. On the 11th to 13th temperatures were near average, slightly cool, or slightly warm, warming to 3 ºC above average on the 14th and close to average or slightly warm until the 19th. Cool to cold days followed, especially on the 22nd being 6 ºC below average and the 23rd being 9 ºC below average. The 25th to 30th was slightly warm and the 31st was slightly cool.
Seasonal Mean Daily Minimum Pressure: 1015.4 hPa (1.3 hPa lower than same season in 2019). This is the equal third highest on record for autumn and the lowest since the 1015.2 hPa in 2018.
Seasonal Mean Daily Maximum Pressure: 1019.8 hPa (1.2 hPa lower than same season in 2019). This is the fourth highest on record for autumn and the lowest since 1019.4 hPa in 2018.
Seasonal Mean Pressure: 1017.6 hPa (1.8 hPa above average) and 1.5 hPa lower than same season in 2019. This is the fourth highest on record for autumn and the lowest since 1017.3 hPa in 2018.
Monthly Mean MSL Pressure (for April): 1016.6 hPa (1.2 hPa above average, 4.2 hPa lower than same month in 2019). This is the third lowest on record for April and the lowest since 1016 hPa in 2014.
Lowest Seasonal MSL Pressure: 1006.4 hPa on 4 April 2020 at 2:57 PM. The same month in 2019 saw 1014.4 hPa and the same season in 2019 saw 1004 hPa. This is the third lowest monthly minimum air pressure for April, the fifth lowest daily minimum air pressure for April and the lowest since 1006.2 hPa in 2015 on 5 April at 2:49 PM. For autumn this is the third highest seasonal minimum air pressure, the highest since 1007.3 hPa in 2018 on 1 March at 4:10 PM, the equal twentieth lowest daily air pressure and the lowest since 1004.8 hPa on 30 March 2019 at 2:20 PM.
Monthly Lowest Pressure (for March): 1007.3 hPa on 6 March 2020 at 4:33 PM. The same month in 2019 saw 1004 hPa. This is equal second highest monthly minimum air pressure for March, the equal highest since 1007.3 hPa in 2018 on 1 March at 4:10 PM, the nineteenth lowest daily minimum air pressure for March and the lowest since 1004.8 hPa on 30 March 2019 at 2:20 PM.
Seasonal Highest Pressure: 1028.1 hPa on 18 May 2020 at 9:39 AM. The same month in 2019 saw 1028.6 hPa and the same season in 2019 was 1028.6 hPa. This is the fourth lowest May monthly maximum air pressure, the lowest since 1028 hPa in 2018 on 6 May at 9:10 AM, the sixteenth highest daily maximum air pressure for May and the highest since 1028.1 hPa on 22 May 2019 at 9:13 AM. For autumn this is the third lowest seasonal pressure on record, the lowest since 1028 hPa in 2018 on 6 May at 9:10 AM, the equal sixteenth highest daily air pressure and the equal highest since 1028.1 hPa on 22 May 2019 at 9:13 AM.
Monthly Highest Pressure (for March): 1024.5 hPa on 18 March 2020 at 8:48 AM. The same month in 2019 saw 1022.9 hPa. This is the second highest March monthly maximum air pressure, the highest since the current record high of 1029 hPa in 2010 on 12 March at 11:59 AM, the fourth highest daily maximum air pressure for March and the highest since 1025 hPa on 18 March 2010 at 8:50 AM.
Note: Air pressure measurements are being closely monitored to maintain its accuracy as much as possible. Over the season of autumn 2019, a difference of 0.27 hPa lower compared to the official BoM Brisbane site – No. 040913 was observed which is deemed to be optimum.
Seasonal Mean Daily Minimum Humidity: 47.1 % (0.9 % higher than same season in 2019 and 7.7 % below average). This is the second lowest on record for autumn and the highest since 55.8 % in 2018.
Monthly Mean Daily Minimum Humidity (for March): 47.4 % (1.8 % higher than same month in 2019 and 2 % below average). This is the second lowest on record for March and the highest since 62.3 % in 2018.
Monthly Mean Daily Minimum Humidity (for April): 43.2 % (11.1 % lower than same month in 2019 and 11.4 % below average). This is the lowest on record for April exceeding the previous record low of 51.5% in 2017.
Monthly Mean Daily Minimum Humidity (for May): 46.5 % (0.8 % higher than same month in 2019 and 6 % below average). This is the second lowest on record for May and the highest since the current record low of 45.7 % in 2019.
Seasonal Mean Daily Maximum Humidity: 91.0% (2.4% higher than same season in 2019 and 0.3% below average). This is the sixth highest and lowest on record for autumn and was the highest since 94.5 % in 2018.
Monthly Mean Daily Maximum Humidity (for March): 87.3 % (2.5 % lower than same month in 2019 and 1.3 % below average). This is second lowest on record for March and the highest since 93.1% in 2018.
Monthly Mean Daily Maximum Humidity (for April): 94.9 % (1.4 % higher than same month in 2019 and 2.9 % above average). This is second highest on record for April and the highest since the current record high of 95.6% in 2018.
Monthly Mean Maximum Humidity (for May): 86.7 % (1.4 % higher than same month in 2019 and 2.4 % above average). This is the second lowest on record for May and the lowest since the current record low of 80.5% in 2015.
Seasonal Mean Humidity: 69 % (1.6 % higher than same season in 2019 and 4 % below average). This is the second lowest on record for autumn and the highest since 75.1 % in 2018.
Monthly Mean Humidity (for March): 67.4 % (0.3 % lower than same month in 2019 and 1.7 % below average). This is the lowest on record for March exceeding the previous record low of 67.7 % in 2019.
Monthly Mean Humidity (for April): 69 % (4.9 % lower than same month in 2019 and 4.3 % below average). This is the lowest on record for April exceeding the previous record low of 70.1 % in 2017.
Monthly Mean Humidity (for May): 66.6 % (1 % lower than same month in 2019 and 4.2% below average). This is the lowest on record for May exceeding the previous record low of 67.6 % in 2016.
Seasonal Lowest Humidity: 18 % on 5 April 2020 at 3:02 PM (11% lower than this month in 2019 and 11% higher than same season in 2019). This is the lowest monthly minimum humidity for April on record, exceeding the previous record low of 31% in 2019 on 5 April at 2:18 PM. For autumn this is the second lowest seasonal minimum relative humidity, the highest since 32% in 2018 on 11 March at 6:19 PM, the fourth lowest daily minimum relative humidity and the lowest since 17% on 31 March 2019.
Monthly Lowest Humidity (for March): 28 % on 21 March 2020 at 1:14 PM (16% higher than this month in 2019). This is the second lowest monthly minimum humidity for March on record, the lowest since the current record low of 12% in 2019 on the 12 March at 2:45 PM, the fifth lowest daily minimum humidity for March and the lowest since 14% on 31 March 2019 at 2:13 PM.
Monthly Lowest Humidity (For May): 23 % on 3 May 2020 at 3:50 PM (12% higher than this month in 2019). This is the second lowest monthly minimum humidity for May on record, the third lowest daily minimum humidity for May and the lowest since the current record low of 11% in 2019 on 31 May at 2:05 PM.
Seasonal Highest Humidity: 99 % on 7 March 2020 at 6:52 AM (1 % lower than this month in 2019 and 2% higher than same season in 2019). This is the second highest monthly March maximum humidity on record and the lowest since 98% on 31 March 2018 at 4:40 AM. For autumn this is the second highest seasonal maximum relative humidity on record and the highest since 100% in 2017 on 30 March 2017 at 1:00 PM.
Monthly Lowest Humidity (for April): 98 % on 30 April 2020 at 7:09 AM (equalled this month in 2019). This is the second highest monthly April maximum humidity on record and equalled 98% in 2019 on 27 April 2019 at 7:17 AM.
Seasonal mean daily minimum dew point: 12.4 ºC (1.6 ºC below average). This is the second lowest seasonal mean minimum dew point on record for autumn, and the highest since 14.2 ºC in 2019.
Monthly mean minimum dew point (for March): 14.6 ºC (0.6 ºC below average). This is the lowest monthly mean minimum dew point for March on record exceeding the previous record low of 15.7 ºC in 2019.
Monthly mean minimum dew point (for April): 12.7 ºC (1.4 ºC below average). This is the equal second lowest monthly mean minimum dew point for April on record and the lowest since 12.7 ºC in 2017.
Monthly mean minimum dew point (for May): 8.6 ºC (1.5 ºC below average). This is the lowest monthly mean minimum dew point for May on record exceeding the previous record low of 8.7 ºC in 2019.
Seasonal mean daily maximum dew point: 17.9 ºC (0.4 ºC below average). This is the equal third lowest seasonal mean maximum dew point on record for autumn and the equal lowest since 17.9 ºC in 2012.
Monthly mean maximum dew point (for March): 19.5 ºC (0.4 ºC below average). This is the lowest monthly mean maximum dew point for March on record exceeding the previous record low of 21.5 ºC in 2019.
Monthly mean maximum dew point (for May): 14.1 ºC (1.0 ºC below average). This is the third lowest monthly mean maximum dew point for May on record and the lowest since 13.3 ºC in 2011.
Seasonal mean dew point: 15.1 ºC (1.0 ºC below average). This is the equal lowest seasonal mean dew point on record for autumn, equalling the current record low of 15.1 ºC in 2019.
Monthly mean dew point (for March): 17 ºC (0.5 ºC below average). This is the lowest monthly mean dew point for March on record exceeding the previous record low of 18.6 ºC in 2019.
Monthly mean dew point (for May): 11.4 ºC (1.2 ºC below average). This is the lowest monthly mean dew point for May on record exceeding the previous record low of 11.8 ºC in 2012.
Seasonal lowest dew point: 1.9 ºC on 3 May 2020 at 3:58 PM. This is the fifth lowest monthly minimum dew point for May on record, the tenth lowest daily dew point for May and the lowest since the current record low of -11.1 ºC on 31 May 2019 at 2:10 PM. For autumn this is the fifth lowest seasonal minimum dew point on record, the highest since 0.3 ºC in 2018 on 11 May at 11:50 PM, the tenth lowest daily dew point for autumn and the lowest since 11.1 ºC on 31 May 2019 at 2:10 PM.
Monthly lowest dew point (for March): 9.6 ºC on 16 March 2020 at 3:48 PM. This is the second lowest monthly minimum dew point for March on record, the highest since 15.2 ºC in 2018 on 9 March at 11:15 PM, the third lowest daily dew point for March and the lowest since -2.2 ºC on 31 March 2019 at 2:14 PM.
Monthly lowest dew point (for April): 2.9 ºC on 12 April 2020 at 12:15 PM. This is the lowest monthly minimum dew point for April on record, exceeding the previous record low of 3.4 ºC in 2017 on 10 April at 9:05 PM.
Seasonal highest dew point: 24.6 ºC on 7 March 2020 at 8:38 AM. This is the fifth lowest monthly maximum dew point on record for March, the equal eighth highest daily dew point for March and the highest since 24.9 ºC in 2018 on 3 March at 2:29 PM. For autumn this is the equal second highest seasonal and daily maximum dew point on record, and the highest since the current record high of 25.7 ºC in 2014 on the 29 March at 1:11 PM.
Monthly highest dew point (for May): 18.8 ºC on 21 May 2020 at 1:19 PM. This is the fourth lowest monthly maximum dew point on record for May, the lowest since 17.9 ºC in 2012 on 4 May at 11:11 AM, the equal nineteenth highest daily dew point for May and equal highest on 21 May 2019 at 11:12 AM.
Maximum Wind Gust: 42 km/hr on 13 March 2020 at 12:50 PM. This is the third lowest March maximum wind gust and the lowest since 39.5 km/hr in 2011 on the 5 March at 6:59 PM. The maximum wind gust this month in 2019 was 46 km/hr and this season in 2019 was 52 km/hr. This is the twentieth highest daily wind gust on record for March and the highest since 44 km/hr in 2019 on the 18 March at 1:57 PM. For autumn this is the second lowest maximum seasonal wind gust, the lowest since the current record low of 39.5 km/hr in 2010 on 26 May at 3:06 PM, the thirty-fifth highest daily wind gust on record for autumn and the highest since 52 km/hr on 11 May 2019 at 12:49 AM.
Maximum Monthly Wind Gust (for May): 41 km/hr on 2 May 2020 at 11:45 PM. This is the fifth lowest May maximum wind gust, the lowest since 39.7 km/hr in 2014 on 13 May at 2:23 PM, the fifteenth highest daily wind gust on record for May and the highest since 52 km/hr on 11 May 2019 at 12:49 AM.
Maximum Wind Speed: 28 km/hr on 3 May 2020 at 10:50 AM (Moderate Force Wind). This is the fourth lowest monthly maximum wind speed for May on record, the twelfth highest daily wind speed on record for May and the highest since 33.7 km/hr in 2018 on 12 May at 8:48 AM. This season in 2018 was 45.7 km/hr. For autumn this is the equal third lowest seasonal maximum wind speed, the twenty-sixth highest daily maximum wind speed and equalling 28 km/hr in 2019 on 15 March at 4:19 PM.
Monthly Maximum Wind Speed (for March): 17 km/hr on 15 March 2020 at 1:54 PM (Light Force Wind). This is the lowest monthly maximum wind speed for March on record, exceeding the previous record low of 17.8 km/hr in 2012 on the 6 March at 9:00 AM, the fifty-second highest daily wind speed on record for March and the highest since 28 km/hr on 15 March 2019 at 4:19 PM.
Seasonal Wind Run: 8067.2 km (138 km less than same season in 2019). This is the second highest on record and the highest since the current record high of 8205.2 km in 2019. This is 211.1 km above average and 2.7 % above average.
Wind Run (for March): 3188.9 km (70.6 km higher than same month in 2019), 689 km above average and 27.5 % above average. This is the highest on record for March total wind run exceeding the previous record high of 3118.3 km in 2019.
Wind Run (for April): 2022.5 km (644.4 km higher than same month in 2019), 32.3 km above average and 1.6 % above average. This is the second highest on record for April total wind run and the highest since the current record high of 2666.9 km in 2019.
Wind Run (for May): 2555.8 km (435.8 km higher than same month in 2019), 840 km above average and 41.6 % above average. This is the highest on record for May total wind run exceeding the previous record high of 2420 km in 2019.
Seasonal Mean Wind Speed: 3.7 km/hr (0.1 km/hr lower than this season in 2019, 0.9 km/hr above average and 32.1 % above average) and the second highest on record for autumn, with the current record being 3.8 km/hr in 2019.
Monthly Mean Wind Speed (for March): 4.3 km/hr (0.1 km lower than this month in 2019), 1 km/hr above average and 30 % above average. This is the highest on record for March exceeding the previous record high of 4.2 km/hr in 2019.
Monthly Mean Wind Speed (for April): 2.8 km/hr (0.9 km lower than this month in 2019), and equal to the long-term average. This is the second highest on record for April and the highest since the current record high of 3.7 km/hr in 2019.
Monthly Mean Wind Speed (for May): 4.2 km/hr (0.6 km lower than this month in 2019), 0.8 km/hr above average and 23.5% above average. This is the second highest on record for May and the highest since the current record high of 4.7 km/hr in 2019.
Daily Mean Maximum Wind Gust: 24 km/hr (0.9 km lower than this season in 2019), 3.8 km/hr above average and 18.8% above average. This is the fifth highest daily mean maximum wind gust for autumn on record and the lowest since 22.8 km/hr in 2014.
Daily Mean Maximum Wind Gust (for March): 17 km/hr (1.4 km/hr lower than this month in 2019), 3.5 km/hr above average and 15.8% above average. This is the fifth lowest daily mean maximum wind gust on record for March and the lowest since 24.3 km/hr in 2014.
Daily Mean Maximum Wind Gust (for April)): 22.3 km/hr (2.3 km/hr lower than this month in 2019), 2.2 km/hr above average and 10.9% above average. This is the fifth lowest daily mean maximum wind gust on record for April and the lowest since the current record low of 17 km/hr in 2013.
Daily Mean Maximum Wind Speed: 12.1 km/hr, 0.1 km/hr lower than this season in 2019, 4.1 km/hr above average and 51.2 % above average. This is the third lowest daily mean maximum wind speed on record for autumn and the lowest since 9.1 km/hr in 2012.
Daily Mean Maximum Wind Speed (for March): 12.6 km/hr, 0.6 km/hr lower than this month in 2019), 3.8 km/hr above average and 43.6 % above average. This is the second lowest daily mean maximum wind speed on record for March and the lowest since the current record low of 9.9 km/hr in 2012.
Daily Mean Maximum Wind Speed (for April): 11.3 km/hr, 0.4 km/hr lower than this month in 2019), 3.5 km/hr above average and 45.2 % above average. This is the third lowest daily mean maximum wind speed on record for April and the lowest since the current record low of 8.9 km/hr in 2012.
Dominant Direction: S (S this season in 2019).
Seasonal Rainfall Total: 168 mm (153 mm below average and 52.3 % of the long term average), this season in 2019 was 343.2 mm. This is the eleventh lowest autumn rainfall on record, the lowest since 139.4 mm in 2016 and ranks as decile 3/ 31st percentile and as low. Autumn was 99.3 mm below the long-term median (37.1 % of long term median). All of the official sites in the Brisbane area observed below average rainfall totals during autumn. All of the main official sites saw totals that ranked as low or as very low at some of the inland sites. Of these sites the lowest rainfall total was observed by Gatton at 59.8 mm, ranking as low and was 35 % of the long term average. The lowest fraction of the long term average was 32% of the long term average at Beaudesert (66.8 mm). The sites that ranked as very low were Archerfield (93 mm and 34 % of the long term average) and Archerfield (66.8 mm, 32% of the long term average and observed the lowest fraction of the long term average). The remaining sites saw totals that were between 35% at Gatton and 65 % at Redcliffe (190.2 mm). The highest autumn rainfall total of all the sites was 345 mm at Point Lookout. The autumn rainfall total in Brisbane is unknown due to equipment issues in March, and was estimated to be about 94 mm, which is 40 % of the long term average.
Number of Rain Days: 32 days, 15 less than same season in 2019 and 1.8 days above average. This is the equal eleventh highest on record for autumn and the lowest since 27 days in 2015.
Number of Rain Days (0.1 mm or greater) for March: 15 days, 3 less than this month in 2019 and 2.5 days above average. This is equal eighth highest on record for March and is the lowest since 9 days in 2015.
Highest Daily Total: 43.8 mm on 7 March 2020. This is the fourteenth highest for March highest daily rainfall on record, the lowest since 22.7 mm on 31 March 2016, the thirteenth highest daily rainfall on daily basis and the highest since 83.7 mm on 17 March 2019. The highest daily total in the Brisbane area of all official sites was 89.6 mm at Fort Lytton on 10 March 2020. For autumn this is the thirteenth lowest daily rainfall total on record, the lowest since 22.7 mm on 31 March 2016, the fifty-fifth highest daily rainfall total and the highest since 83.7 mm on 17 March 2019. The highest daily total in the Brisbane area of all official sites was 89.6 mm at Fort Lytton on 10 March 2020.
Highest Daily Total for May: 8.6 mm on 22 May 2020. This is the fifth lowest for May highest daily rainfall on record, the lowest since 8.5 mm on 3 May 2014, the sixty-second highest daily rainfall on daily basis and the highest since 10.3 mm on 5 May 2019. The highest daily total in the Brisbane area of all official sites was 16.6 mm at Landsborough on 18 May 2020.
Wettest Month (March): 142.4 mm (18.2 mm above average) and 114.7% of the long-term average. This total is in decile 6/ 55th percentile which ranks as average and 22.8 mm above the long-term median (119 % of long term median). This total is lower than this month in 2019 which was 236.9 mm, the sixteenth highest on record for March and the lowest since 105.9 mm in 2016. The long period rainfall totals improved a little further following further rainfall in March on the short timespans. For 6 month rainfall this is 132 mm above average (decile 9) with a total of 833.6 mm and 9 monthly rainfall is 65 mm above average (decile 7) with a total of 865.8 mm. 12 monthly rainfall however is 41.8 mm below average (decile 5) with a total of 1102.5 mm. 18 monthly to 36 monthly rainfall remains very much below average at 100 to 200 mm below average though 18 month rainfall was 88 mm below average (decile 6) with a total rainfall of 1661.3 m. These long period rainfall totals however have improved compared to the long periods totals in February. 48 month rainfall is 131.5 mm above average (decile 7) with a total of 4193.9 mm.
The main official sites in the Brisbane area observed close to average March rainfall totals. Most sites ranked as average and saw totals between 62% at Archerfield (78.4 mm) and 137% of the long term average at Point Lookout (187.8 mm). The exception to this was two sites measuring totals that ranked as low with 49.2 mm at Beaudesert (40% of the long term average) and 40.8 mm at Gatton (52% of the long term average), which the lowest total of the main official sites. The total at Point Lookout was the highest of the main official sites whilst the highest of all the sites was 215.8 mm at Rocky Point Sugar Mill. The Brisbane site experienced equipment outages during March with the true total not known, the Bureau estimate the total based on surrounding sites is around 83 mm (72 % of the long term average).
Driest Month (May): 12.1 mm (90.9 mm below average) and 11.8% of the long-term average. This total is in decile 1/ 6th percentile which ranks as very low and 33.1 mm below the long-term median (26.8 % of long term median). This total is lower than this month in 2019 which was 41.4 mm, the third lowest on record for May and the lowest since 12 mm in 2004. The long period rainfall totals continued to reduce further in May after another month of below average rainfall on timespans. For 6 month rainfall this is 60.5 mm above average (decile 8) with a total of 796.5 mm and the anomaly for 9 monthly rainfall slipped into the negative (-57.9 mm) which is decile 7 with a total of 862 mm. 12 monthly rainfall also was 117.6 mm below average (decile 4) with a total of 927.3 mm. 18 monthly to 48 monthly rainfall remains very well below average at 149 and 368 mm below average ranking at decile 3 and 4 respectively, with the greatest negative anomaly being the 18 months with the longer periods expressing lower anomalies.
All of the main official sites in the Brisbane area observed below to very low rainfall totals for June. Many of the sites ranked historically as very low with totals at these sites of between 10% of the long term average at Beaudesert (a total of 4.8 mm) and 26 % at Brisbane Aero (24.4 mm). Some sites saw totals that ranked as low which were between 22% of the long term average at Logan City Treatment Plant with a total of 21.4 mm and 39% of the long term average with a total of 63.8 mm at Cape Moreton Lighthouse. Point Lookout observed the highest rainfall total for June of all the official sites with a total of 73.6 mm. Brisbane observed a total of 12.2 mm, which was 20% of the long term average and ranks historically as very low. Greenbank Thompson Road observed a new record low of 10.4 mm exceeding the previous record low of 12.6 mm in 1988. Amberley equalled the existing record of 8.2 mm in 1984 and Alderley measured a total of 11.7 mm and was lowest since 5.6 mm in 1988 (but a lower value may have not been reported during gaps in the station record).
April Monthly Rainfall: 13.5 mm (80.3 mm below average) and 14.4% of the long-term average. This total is in decile 2/ 16th percentile which ranks as very low and 28.7 mm below the long-term median (32 % of long term median). This total is lower than this month in 2019 which was 64.9 mm, the sixth lowest on record for April and the lowest since 9.2 mm in 2017. The long period rainfall totals reduced after little rainfall in April on all timespans. For 6 month rainfall this is 48.7 mm above average (decile 7) with a total of 784.4 mm and 9 monthly rainfall slipped to 69.6 mm below average (decile 6) with a total of 849.9 mm. 12 monthly rainfall also was 129.3 mm below average (decile 4) with a total of 915.2 mm. 18 monthly to 36 monthly rainfall remains very much below average at 120 to 380 mm below average ranking at decile 3 and 4.
All of the main official sites in the Brisbane area observed below to well below average rainfall totals in April. Most sites ranked historically as very low or low. One site ranked as average with a total of 12.8 mm at Beaudesert (12.8 mm). Many sites ranked as low that were between 10 % of the long term average at Gatton and 33 % of the long term average at Redcliffe (a total of 29 mm which ranked as low). The highest total of all the official sites was 84.1 mm at Point Lookout (51% of the long term average which the highest of all the main official sites and ranked as low). Several sites ranked as very low and were between 7% of the long term average at Amberley (a total of 3.8 mm) and 15 % of the long term average at Cape Moreton Lighthouse (22.2 mm) and Logan City Treatment Plant (11.9 mm). Archerfield measured a record low for its April rainfall total of 3.8 mm (4 % of the long term average) exceeding the previous record low of 5.2 mm in 2007. Highvale and Wivenhoe Dam also measured record low rainfall totals of 5.8 mm and 1.4 mm respectively.
Seasonal Rainfall Total – (automatic gauge) 24 hours to 9am: 137.2 mm (92.1 mm less than official standard gauge and within 18.3 %). Highest daily total of automatic gauge, (24 hours to 9am): 41 mm on 7 March 2020, (24 hours from midnight): 40.8 mm on 6 March 2020.
Note: This automatic gauge for the season, failed to meet the expected accuracy (of +/- 10% of the standard gauge) of -18.3%. Note: The rain gauge did not meet the expected accuracy for each month of the season, namely -17.3% for March, -18.5% for April and -30.6% for May.
There was 2 days with falls of at least 25 mm (2 less than same season in 2019) with 14 days of less than 1 mm (19 less than same season in 2019).
Highest rainfall rate was 192 mm/hr on the 6 March 2020 at 5:27 PM. This is the second highest monthly and daily rainfall rate for March and the highest since the current record high of 217.2 mm/hr in 2019 on 15 March at 4:20 PM. For autumn this is the second highest seasonal and daily rain rate and the highest since the current record high of 217.4 mm/hr in 2019 on 15 March at 4:20 PM.
Monthly highest rainfall rate (for May): 41.8 mm/hr on the 21 May 2020 at 4:03 PM. This is the second highest monthly rainfall rate for May, the highest since the current record high of 111.8 mm/hr in 2019 on 4 May at 2:11 PM, the third highest daily maximum rain rate for May and the highest since 88.6 mm/hr on 10 May 2019 at 7:30 PM.
The highest hourly rainfall total was 40.6 mm on the 6 March 2020 at 5:47 PM. This is the highest hourly rain for March, exceeding the previous record of 36.3 mm in 27 March 2018 at 12:10 PM. For autumn this is the highest seasonal and daily maximum hourly rainfall on record, exceeding the previous record high of 38.8 mm on 1 May 2015 at 5:15 PM.
The highest hourly rainfall total (for April) was 3.8 mm on the 19 April 2020 at 11:25 AM. This is the second lowest hourly rain for April, the lowest since the current record low of 1.6 mm in 2017 on 22 April at 5:20 AM, the seventeenth highest daily highest daily total for April and the highest since 14.2 mm on 20 April 2019 at 5:30 PM.
In March rainfall was close to average with a total of 142.4 mm and 114.7% of the long term average which ranked as average. Rainfall fell over 15 days which was 2.5 days above average. The main official sites in the Brisbane area observed close to average March rainfall totals. In the Brisbane area light to moderate falls from onshore showers occurred from the 3rd to the 5th before surface and upper level troughs moving across eastern Queensland brought showers and thunderstorms. It was especially wet on the 9th and 10th with most locations measuring totals of between 20 mm and 50 mm on the 10th. Through to the middle of the month moist onshore flow brought showers with moderate falls. At the end of the month some locations received light to moderate rainfall totals from coastal showers. At Ferny Grove in the first half of the March were showers and thunderstorms, with light rain and drizzle after the first week. A severe thunderstorm of the 6th brought extremely heavy rainfall of 40 mm in 30 minutes. Some light showers and drizzle in the last week of the month.
Rainfall in April was well below average with a total of 13.5 mm which was 14.4% of the long term average and ranked as very low. Rainfall was observed over 15 days which was 4.9 days above average. All of the main official sites in the Brisbane area observed below to well below average rainfall totals in April. Most sites ranked historically as very low or low. There was some shower activity in the Brisbane area in April with sites in northern and coastal locations received more frequent showers than the sites further inland. However, all sites measured below average rainfall totals. Most rainfall at Ferny Grove during April were light showers occurring mostly in the first half of the month. The highest daily rainfall total was produced by a late morning mild thunderstorm with mostly light rain and some brief moderate falls.
In May there was 12.1 mm of rainfall (well below average) which was 11.8% of the long term average and ranked as very low (lowest for May since 2004). Rainfall was observed on 8 days which was 0.2 days below average. All the main official sites in the Brisbane area observed below to very below average rainfall totals for May. Many of the sites ranked historically as very low with totals at these sites of between 10% of the long term average at Beaudesert (a total of 4.8 mm) and 26 % at Brisbane Aero (24.4 mm). Some of these official sites saw record low May total rainfall totals. There was very little rainfall across the Brisbane area during the month. On the 21st and 22nd were showers with moderate falls due to the influence of a surface trough. In May at Ferny Grove most rainfall were light showers occurring mostly during the middle of the month. On the 21st was some light rain at times, which brought the highest daily total for the month.
Number of severe thunderstorms: 1
Number of thunderstorms: 2 (Mild: 1, Moderate: 0)
Number of thunder days: 2 days
Number of nearby only storms: 9
Severe thunderstorms in the Brisbane area:
March:
April:
May:
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 low March mean daily minimum temperature in at least 5 years |
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Observed [C] |
Most recent lower |
Years of record |
Monthly average |
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18.7 |
18.6 in 2014 |
10 |
19.3 |
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Record high April mean daily maximum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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29.1 |
28.9 in 2016 |
10 |
26.4 |
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Record low April 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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23.9 |
23.8 in 2014 |
10 |
23.9 |
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Record high autumn and May daily minimum temperature |
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Observed [C] |
Old record |
Years of record |
Seasonal/ Monthly average |
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9.1 on 4th May at 3:28 AM |
9 in 2017 on 31st May at 7:09 AM |
10 |
16.3/ 12.5 |
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Record high April highest maximum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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34.2 on 17th at 3:19 PM |
33.1 in 2018 on 5th at 2:09 PM |
10 |
26.4 |
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Record low autumn and May lowest daily maximum temperature |
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Observed [C] |
Old record |
Years of record |
Seasonal/ Monthly average |
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15.6 on 23rd May at 8:55 AM |
17.7 in 2013 on 16th May at 12:20 AM |
10 |
24/ 23.4 |
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Record low March lowest daily maximum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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20.9 on 9th 9:00 AM |
21.9 in 2019 on 2 March at 12:40 PM |
10 |
28.6 |
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Record high autumn and March highest daily minimum temperature |
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Observed [C] |
Old record |
Years of record |
Seasonal/ Monthly average |
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24.4 on 6th March at 3:50 AM |
24.2 in 2015 on 26th March at 6:20 AM |
10 |
16.3/ 19.3 |
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Record low May highest daily minimum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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15.6 on 21st at 1:55 AM |
16.2 in 2015 on 8th at 6:10 AM |
10 |
12.5 |
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Record high March mean daily maximum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
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1016.3 |
=1016.3 |
10 |
1017.1 |
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Record low April mean MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent lower |
Years of record |
Monthly average |
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1016.6 |
1016 in 2014 |
10 |
1015.4 |
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Record low April minimum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent lower |
Years of record |
Monthly average |
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1006.4 on 4th at 2:57 PM |
1006.2 in 2015 on th at 2:49 PM |
10 |
1015.4 |
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Record high March maximum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
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1024.5 on 18th at 8:48 AM |
1025 in 2010 on 8th at 8:50 AM |
10 |
1014 |
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Record low April mean daily minimum relative humidity |
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Observed [%] |
Old record |
Years of record |
Monthly average |
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43.2 |
51.5 in 2017 |
10 |
54.6 |
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Record low May mean daily maximum relative humidity in at least 5 years |
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Observed [%] |
Most recent lower |
Years of record |
Monthly average |
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86.7 |
80.5 in 2015 |
10 |
84.3 |
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Record low March mean relative humidity |
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Observed [%] |
Old record |
Years of record |
Monthly average |
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67.4 |
67.7 in 2019 |
10 |
69.1 |
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Record low April mean relative humidity |
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Observed [%] |
Old record |
Years of record |
Monthly average |
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69 |
70.1 in 2017 |
10 |
73.3 |
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Record low May mean relative humidity |
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Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
66.6 |
67.6 in 2016 |
10 |
64.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low April minimum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
18 on 5th at 3:02 PM |
31 in 2019 on 27th at 7:17 AM |
10 |
54.6 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low March mean daily minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
14.6 |
15.7 in 2019 |
10 |
15.2 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low May mean daily minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
8.6 |
8.7 in 2019 |
10 |
10.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn mean maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
||||||
17.9 |
17.9 in 2012 |
10 |
18.3 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low March mean daily maximum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
19.5 |
21.5 in 2019 |
10 |
19.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low May mean daily maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
14.1 |
13.3 in 2011 |
10 |
15.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn mean dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Seasonal average |
||||||
15.1 |
=15.1 in 2019 |
10 |
16.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low March mean dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
17 |
18.6 in 2019 |
10 |
17.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low May mean dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
11.4 |
11.8 in 2012 |
10 |
12.4 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low April minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
2.9 on 12th at 12:15 PM |
3.4 in 2017 on 10th at 9:05 PM |
10 |
14.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low May maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
18.8 on 21st at 1:19 PM |
17.9 in 2012 on 4th at 11:11 AM |
10 |
10.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Seasonal average |
||||||
42 on 13th March at 12:50 PM |
39.5 in 2010 on 26th May at 3:06 PM |
9 |
20.2 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low March maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
42 on 13th at 12:50 PM |
39.5 in 2011 on 5th at 6:59 PM |
9 |
20.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low May highest wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
41 on 2nd at 11:45 PM |
39.7 in 2014 on 13th at 2:23 PM |
9 |
18.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low March maximum wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
17 on 15th at 1:54 PM |
17.8 in 2012 on 6th at 9:00 AM |
9 |
8.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low March total wind run |
|||||||||
Observed [km] |
Old record |
Years of record |
Monthly average |
||||||
3188.9 |
3118.3 in 2019 |
8 |
2499.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high May total wind run |
|||||||||
Observed [km] |
Old record |
Years of record |
Monthly average |
||||||
2555.8 |
2420 in 2019 |
8 |
1715.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high March mean wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
4.3 |
4.2 in 2019 |
8 |
3.3 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn daily mean maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Seasonal average |
||||||
24 |
22.8 in 2014 |
9 |
20.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low March daily mean wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
17 |
24.3 in 2014 |
9 |
13.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low April daily mean wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
22.3 |
17 in 2013 |
9 |
20.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn daily mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.1 |
9.1 in 2012 |
9 |
8 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low March daily mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.6 |
9.9 in 2012 |
9 |
8.8 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low April daily mean wind speed in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent lower |
Years of record |
Monthly average |
||||||
11.3 |
8.9 in 2012 |
9 |
7.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low May total rainfall total in at least 5 years |
|||||||||
Observed [mm] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.1 |
12 in 2004 |
33 |
103 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn number of rain days in at least 5 years |
|||||||||
Observed [days] |
Most recent lower |
Years of record |
Seasonal average |
||||||
15 |
9 in 2015 |
30 |
12.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low March number of rain days in at least 5 years |
|||||||||
Observed [days] |
Most recent lower |
Years of record |
Monthly average |
||||||
15 |
9 in 2015 |
33 |
12.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low autumn highest daily rainfall total in at least 5 years |
|||||||||
Observed [mm] |
Most recent lower |
Years of record |
Seasonal average |
||||||
43.8 mm on 7 March 2020 |
22.7 on 31st March 2016 |
33 |
38.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low May highest daily rainfall total in at least 5 years |
|||||||||
Observed [mm] |
Most recent lower |
Years of record |
Monthly average |
||||||
8.6 on 22nd |
8.5 in 2014 on 3rd |
33 |
29.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high autumn maximum hourly rainfall |
|||||||||
Observed [mm] |
Old record |
Years of record |
Seasonal average |
||||||
40.6 on 6th March at 5:47 PM |
38.8 on 1st May 2015 at 5:15 PM |
8 |
27.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high March maximum hourly rainfall |
|||||||||
Observed [mm] |
Old record |
Years of record |
Monthly average |
||||||
40.6 on 6th at 5:47 PM |
36.3 in 2018 on 27th at 12:10 PM |
8 |
26.2 |
||||||
|
|
|
|
|
|
|
|
|
|
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 |
March |
Highest Hourly Rainfall 40.6 mm on 06 Mar 2020 at 5:47 pm |
April |
Maximum Temperature: 34.2 °C on 17 Apr 2020 at 3:19 pm |
Minimum Dew Point Temperature: 2.9 °C on 12 Apr 2020 at 12:15 pm |
May |
Lowest Maximum Temperature 14.4 °C on 23 May 2020 at 1:17 pm |
Summary of Averages and Extremes for autumn 2020 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 |
March |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
18.7 |
29.1 |
23.9 |
10.4 |
17.5 |
1.3 |
51.5 |
91.4 |
71.4 |
1014.2 |
1018.4 |
1016.3 |
18.0 |
25.4 |
12.6 |
4.6 |
Min |
15.1 |
20.9 |
20.7 |
0.5 |
13.8 |
0.2 |
34 |
72 |
55.5 |
1007.3 |
1011.5 |
1009.4 |
11.4 |
17.0 |
7.0 |
|
Max |
24.4 |
35.2 |
28.4 |
17.2 |
22.8 |
2.7 |
79 |
99 |
88.0 |
1020.9 |
1024.5 |
1022.7 |
25.7 |
42.0 |
17.0 |
43.8 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
142.4 |
April |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
16.0 |
29.1 |
22.6 |
13.1 |
14.6 |
1.4 |
43.2 |
94.9 |
69.0 |
1014.2 |
1019.0 |
1016.6 |
16.0 |
22.3 |
11.3 |
0.5 |
Min |
11.9 |
24.7 |
19.8 |
7.4 |
10.6 |
0.6 |
18 |
86 |
52.5 |
1006.4 |
1010.9 |
1008.7 |
2.9 |
17.0 |
9.0 |
|
Max |
20.6 |
34.2 |
25.5 |
19.4 |
19.0 |
2.7 |
68 |
98 |
82.5 |
1021.4 |
1024.8 |
1023.1 |
22.6 |
37.0 |
21.0 |
4.3 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
13.5 |
May |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
12.7 |
24.2 |
18.4 |
11.5 |
10.9 |
1.8 |
46.5 |
86.7 |
66.6 |
1017.8 |
1022.1 |
1019.9 |
11.4 |
24.4 |
12.3 |
0.4 |
Min |
9.1 |
15.6 |
13.3 |
4.7 |
6.8 |
0.6 |
23 |
64 |
46.5 |
1008.0 |
1013.1 |
1010.8 |
1.9 |
10.0 |
3.0 |
|
Max |
15.6 |
28.1 |
20.5 |
17.1 |
14.1 |
3.1 |
79 |
98 |
88.0 |
1025.3 |
1028.1 |
1026.7 |
18.8 |
41.0 |
28.0 |
8.6 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12.1 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
15.8 |
27.5 |
21.6 |
11.7 |
14.3 |
1.5 |
47.1 |
91.0 |
69.0 |
1015.4 |
1019.8 |
1017.6 |
15.1 |
24.0 |
12.1 |
1.8 |
Min |
9.1 |
15.6 |
13.3 |
0.5 |
6.8 |
0.2 |
18 |
64 |
46.5 |
1006.4 |
1010.9 |
1008.7 |
1.9 |
10.0 |
3.0 |
|
Max |
24.4 |
35.2 |
28.4 |
19.4 |
22.8 |
3.1 |
79 |
99 |
88.0 |
1025.3 |
1028.1 |
1026.7 |
25.7 |
42.0 |
28.0 |
43.8 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
168.0 |
Summary for autumn 2020 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 long-term average (%) |
March |
||||||||
Average |
-0.0 |
-3.6 |
+3.3 |
-1.4 |
+3.6 |
+4.0 |
+18.2 |
114.7 |
Min |
-0.5 |
-5.7 |
|
-1.9 |
|
|
|
|
Max |
+0.4 |
-1.5 |
|
-0.9 |
|
|
+93.6 |
|
April |
||||||||
Average |
+1.4 |
-4.3 |
+1.2 |
-0.4 |
+2.2 |
+3.5 |
-80.3 |
14.4 |
Min |
+0.0 |
-11.4 |
|
-1.4 |
|
|
|
|
Max |
+2.7 |
+2.9 |
|
+0.6 |
|
|
-16.7 |
|
May |
||||||||
Average |
+0.1 |
-4.2 |
+3.1 |
-1.2 |
+5.6 |
+4.7 |
-90.9 |
11.8 |
Min |
+0.2 |
-6.0 |
|
-1.5 |
|
|
|
|
Max |
+0.0 |
-2.4 |
|
-1.0 |
|
|
-25.6 |
|
Season |
||||||||
Average |
+0.5 |
-4.0 |
+2.5 |
-1.0 |
+3.8 |
+4.1 |
-153.0 |
52.3 |
Min |
-0.1 |
-7.7 |
- |
-1.6 |
- |
- |
- |
- |
Max |
+1.1 |
-0.3 |
- |
-0.4 |
- |
- |
- |
- |
Monthly averages and extremes for autumn 2020 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 |
|
|
|
Mar-20 |
18.7 |
29.1 |
15.1 |
35.2 |
23.9 |
-0.5 |
+0.4 |
-0.0 |
142.4 |
+ 18.2 |
15 |
Apr-20 |
16.0 |
29.1 |
11.9 |
34.2 |
22.6 |
+0.0 |
+2.7 |
+1.4 |
13.5 |
-80.3 |
9 |
May-20 |
12.7 |
24.2 |
9.1 |
28.1 |
18.4 |
+0.2 |
-0.0 |
+0.6 |
12.1 |
-90.9 |
8 |
Season |
15.8 |
27.5 |
9.1 |
35.2 |
21.6 |
-0.1 |
+1.1 |
+0.6 |
168.0 |
-153.0 |
32 |
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 29/6/20. 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”.