Overnight and daytime temperatures were above average at Ferny Grove but close to average. Official sites in the Brisbane area observed above average mean minimum temperatures at most sites, though for some sites this was close to average. Daytime temperatures were similarly above average and close to average at some sites. Many mean maximum temperatures were around 1 ºC above average at some inland sites. Rainfall was below average at Ferny Grove but ranks historically as average, with official sites mostly recording below average rainfall but was close to average at some sites. In December air pressure was close to average, below average mean relative humidity, mean maximum relative humidity and mean minimum relative humidity, below average mean, below average mean minimum and near average mean maximum dew point, above average wind speed and 3 thunderstorms (2 thunder days).

 

Temperature – near average nights and days

Monthly Mean Minimum Temperature: 19.5 ºC, 0.5 ºC above average and 0.7 ºC higher than same month in 2017. This is the equal third highest on record for December and the highest since 20 ºC in 2014. Most of the official sites in the Brisbane area observed above average mean minimum temperatures. Some of these temperatures were close to the long term average and within 0.5 ºC of the average. The other sites were 0.6 ºC and the highest was 0.7 ºC above average. The highest above average was Brisbane Aero at 20.8 ºC, Logan City Treatment Plant at 19.9 ºC and Redcliffe at 21.6 ºC. Amberley was equal to the long term average with a mean temperature of 18.4 ºC, while Gatton measured the lowest mean minimum temperature of 17.6 ºC which was 0.5 ºC below average and the only site measuring a below average mean minimum temperature. Brisbane observed a mean minimum temperature of 20.8 ºC (0.4 ºC above average).

 

Monthly Mean Maximum Temperature: 30.4 ºC, 0.5 ºC above average and 1.3 ºC lower than same month in 2017. This is fourth lowest on record and the lowest since 29.5 ºC in 2015. All of the official sites in the Brisbane area measured above average mean maximum temperatures. Some of these sites were close to average, while many were at least 1 ºC above average. The highest above average was Gatton at 1.8 ºC above average with a mean maximum temperature of 33.1 ºC. This was also the highest mean maximum temperature observed. The other sites measured mean maximum temperatures of at least 1 ºC above average was Amberley at 31.8 ºC (+1.0 ºC of the average), Archerfield at 30.6 ºC (+1 ºC), Beaudesert at 31.5 (+1.2 ºC) and Cape Moreton Lighthouse at 27.1 ºC (+1 ºC) which was the lowest mean maximum temperature observed. The lowest anomaly from the long term average was 0.1 ºC above average at Beerburrum with a mean maximum of 29.8 ºC and Logan City Treatment Plant with a mean maximum temperature of 29.2 ºC. Brisbane recorded a mean maximum temperature of 30.1 ºC which is 0.7 ºC above average.

 

Mean Monthly Temperature: 24.9 ºC, equal to long term average and 0.3 ºC lower than same month in 2017. This is the fifth highest and lowest on record and the lowest since 24 ºC in 2015.

 

Lowest Temperature: 14.9 ºC at 4:56 AM on 26 December 2018. Same month in 2017 was 13.8 ºC. This is the second lowest monthly minimum temperature for December, the highest since the current record low of 16.6 ºC on 3 December 2009, equal twenty-sixth lowest daily December minimum temperature and the lowest since 15.7 ºC on 14 December 2017 at 5:34 AM. Official stations in the Brisbane area measured the lowest temperature of the month on the 25th and 26th and at some sites on the 6th and 17th. The lowest was 12 ºC at Gatton on the 25th and the highest was 19.8 ºC at Point Lookout on the 6th. The lowest temperature at Brisbane was 17.2 ºC on the 26th. A cool southerly change brought below average overnight temperatures in the second week of the month and then easing back to close to average temperatures during the middle of the month. Cool nights returned during the last week of the month.

Highest Temperature: 39.8 ºC at 2:47 PM on 21 December 2018. Same month in 2017 was 36.5 ºC. This is the highest monthly and daily maximum temperature for December, exceeding the old record of 38.5 ºC on 4 December 2012 at 3:10 PM. The official sites measured the highest temperature for the month on the 2nd at many sites and at some sites on 1st, 19th, 21st, 22nd and 29th. The lowest was 29.3 ºC at Cape Moreton on the 19th and the highest was 41.1 ºC at Gatton on the 21st. Brisbane observed its highest temperature of 35.7 ºC on the 22nd. The official sites saw above average daytime temperatures at the start of the month during a low intensity heatwave. Well above average daytime temperatures were also observed between the 20th and 21st.

 

Lowest Maximum Temperature: 23.9 ºC at 9:00 AM on 16 December 2018. This is the third lowest monthly December lowest maximum temperature, the lowest since 18.9 ºC in 2011 on 7 December at 4:36 PM, the ninth lowest daily maximum temperature for December and the lowest since 23.4 ºC on 8 December 2011 at 3:28 PM. This month in 2017 was 27.1 ºC. Official stations in the Brisbane area measured the coolest day at most sites on the 7th and 16th and at some sites on the 6th and 9th. These ranged between 23.9 ºC at Cape Moreton Lighthouse on the 7th and 26.2 ºC at Beaudesert on the 7th and Gatton on the 16th. The lowest maximum temperature at Brisbane was 25.7 ºC on the 7th. The official sites measured cool days during the second week of the month after a cool southerly change before returning to near average during the middle of the month. Cool days also associated with the remnants of ex-tropical cyclone Owen that moved thorough on the 16th to 18th.

 

Highest Minimum Temperature: 23.3 ºC at 2:00 AM on 3 December 2018. This is the fifth highest monthly December highest minimum temperature, the lowest since 23.1 ºC in 2015 on 2 December at 10:04 PM, the highest daily minimum temperature for December since 24 ºC on 31 December 2017 at 5:50 AM and seventh highest daily minimum temperature for December. This month in 2017 was 24 ºC. Official stations in the Brisbane area measured the warmest night at some sites on the 3rd, 16th, 20th and 21st. These ranged between 23.2 ºC at Gatton on the 16th and 25.8 ºC at Beerburrum on the 3rd. The lowest maximum temperature at Brisbane was 23.5 ºC on the 6th. There were warm nights at the start of the month during a low intensity heatwave and also between the 14th and 22nd.

 

Monthly Mean Minimum Grass Temperature: 17.8 ºC (0.1 ºC higher than same month in 2017)

 

Lowest Minimum Grass Temperature: 13 ºC on 25 and 26 December 2018 (0.8 ºC lower than same month in 2017). This was with a minimum temperature of 15.2 ºC on 25 December and the lowest minimum temperature for the month on 26 December of 14.9 ºC.

 

Highest Minimum Grass Temperature: 21.9 ºC on 16 December 2018 (2.1 ºC lower than same month in 2017). This was with a minimum air temperature of 22.8 ºC for the month.

 

Minimum temperatures were warm during the middle of the month and some of the start of the month. Cool nights were present at the end of the month. The 1st was 2 ºC above average, 1 ºC above average on the 2nd, and warming to 4 ºC above average on the 3rd and the highest for the month. The 4th and 5th was on average, while the 6th and 7th was 1 ºC below average, while the 8th to 10th was on average. The 11th and 12th was 1 ºC below average, the 13th 1 ºC above average and then followed by 9 warm nights. The 14th and 15th was 3 ºC above average, the 16th was 4 ºC above average, 3 ºC above average on the 17th and 3 ºC above average on the 18th. The 19th and 20th was 3 ºC above average, the 21st was 4 ºC above average and the 22nd was 3 ºC above average. The 23rd was then on average, cooling to 1 ºC below average on the 24th and further to 4 ºC below average on the 25th and the coolest temperature of the month on the 26th. The 27th was 2 ºC below average, the 28th was 1 ºC below average and the 29th was 1 ºC below average. It then warmed to 2 ºC above average on the 30th with the 31st being on average.

 

Maximum temperatures were high on a few days at the very start of the month and during the middle of the month. There were some cool days in first half of the month and otherwise close to average. The 1st was 6 ºC above average, and 7 ºC above average on the 2nd. The 3rd was 1 ºC above average, the 4th was on average before a cool period. The 5th was 2 ºC below average on the 5th, 3 ºC below average on the 6th, 6 ºC below average on the 7th and 5 ºC below average on the 8th. The 9th was 2 ºC below average before a warm period with the 10th to 12th being 1 ºC above average. The 13th and 14th was 2 ºC above average, the 15th was 1 ºC above average before falling to 6 ºC below average on the 16th. The 17th was 1 ºC below average on the 17th and 18th before a short period of high temperatures. The 20th was 6 ºC above average, the 21st was 10 ºC above average and the highest for the month and the 22nd was 6 ºC above average. It was then 3 ºC below average on the 23rd and 24th, 1 ºC below average on the 25th to 27th before warming slightly to 1 ºC above average on the 28th to 31st.

 

 

Heatwave conditions (Maximum temperatures):

1st to 3rd: – 1st (36.4 ºC): Severe heatwave (32.3 ºC), 2nd to 3rd: Low intensity heatwave (37.2 ºC, 30.9 ºC).

 

Air pressure – close to average air pressure

Monthly Mean Minimum Pressure: 1011.1 hPa (0.9 hPa higher than same month in 2017). This is the fifth highest on record and highest since 1013.5 hPa in 2015.

 

Monthly Mean Maximum Pressure: 1016.1 hPa (1.7 hPa higher than same month in 2017). This is the fifth highest on record and the highest since 1017.6 hPa in 2015.

 

Monthly Mean Pressure: 1013.6 hPa (0.3 hPa above average, 1.3 hPa higher than same month in 2017). This is the fourth lowest on record and the highest since 1015.6 hPa in 2015.

 

Lowest Pressure: 1000.4 hPa on 2 December 2018 at 3:58 PM. The same month in 2017 saw 1000.4 hPa. This is the fourth lowest monthly and daily air pressure for December and the lowest since 999.3 hPa on 5 December 2013 at 3:40 PM.

 

Highest Pressure: 1021.8 hPa on 7 December 2018 at 11:19 AM. The same month in 2017 saw 1019.5 hPa. This is the fifth highest December monthly maximum air pressure, the ninth highest daily air pressure for December and the highest since 1022.3 hPa in 2016 on 12 December at 9:52 PM.

Note: Air pressure measurements are being closely monitored to maintain its accuracy. Over the month of December, a difference of 0.13 hPa higher compared to the official BoM Brisbane site – No. 040913 was observed which is deemed acceptable.

 

Relative Humidity – below average mean humidity, mean maximum humidity and mean minimum humidity

Monthly Mean Minimum Humidity: 46 % (5.1 % lower than same month in 2017 and 7.1% below average). This is the second lowest on record whilst the record low is 38.7 % in 2009.

 

Monthly Mean Maximum Humidity: 87.8 % (4.3 % lower than same month in 2017 and 4.6 % below average). This is second lowest on record and the lowest since the current record of 86 % in 2009.

 

Monthly Mean Humidity: 66.9 % (4.7 % lower than same month in 2017 and 5.8 % below average). This is the second lowest on record and the lowest since the current record low of 62.3 % in 2009.

 

Lowest Humidity: 13% on 1 December 2018 at 12:23 PM (13% lower than this month in 2017). This is the second lowest minimum daily and monthly humidity on record for December and the lowest since the current record low of 10 % on 5 December 2012 at 5:15 PM.

 

Highest Humidity: 97% on 16, 17 and 18 December 2018 at 12:23 AM on the 18 December (2% lower than this month in 2017). This is the equal third highest monthly December high humidity and the lowest since 95% in 2016 on 26 December 2016 at 6:35 AM. This previously occurred 14 times.

 

Dew point – below average mean, below average mean minimum and near average mean maximum dew point

Monthly mean minimum dew point: 15.3 ºC (1.7 ºC below average)

 

Monthly mean maximum dew point: 20 ºC (0.3 ºC above average)

 

Monthly mean dew point: 17.7 ºC (0.9 ºC below average)

 

Lowest dew point: 2.7 ºC on 1 December 2018 at 12:35 PM

 

Highest dew point: 24.5 ºC on 21 December 2018 at 4:15 PM

 

Wind Speed – above average wind speed

Maximum Wind Gust: 48 km/hr on 21 December 2018 at 5:45 PM. This is the fourth lowest December maximum wind gust and the lowest since 37.8 km/hr in 2014 on the 3 December at 6:13 PM. The maximum wind gust this month last year was 60 km/hr

 

Maximum Wind Speed: 25 km/hr on 2 December 2018 at 12:19 PM (Moderate Force Wind).

 

Wind Run: 4054 km (2796.7 km more than same month in 2017) and is the highest on record for December on record beating the old record of 1682.6 km in 2012.

 

Monthly Mean Wind Speed: 5.5 km/hr (3.8 km higher than this month last year). This is the highest on record for December exceeding the old record of 2.3 km/hr in 2012 and 2015.

 

Daily Mean Maximum Wind Speed: 15 km/hr

 

Dominant Direction: E (SW this month last year).

 

Rainfall – below average rainfall

Monthly Rainfall Total: 80.1 mm (63.4 mm below average) and 55.8 % of the long term average. This total is in decile 4/ 35th percentile which ranks as average and 8.4 mm below the long term median (88.3 % of long term median). This is lower than the previous year which was 88.9 mm, the lowest since 65.5 mm in 2016 and is the tenth lowest on record.

 

Most of the official sites measured below average rainfall totals for December, whilst some sites reported close to average or above average rainfall. The sites recording below average rainfall recorded totals ranking historically mostly as low and ranged between 26% of the long term average for Brisbane Aero with a total of 31.6 mm and 64% of the long term average for Logan City Treatment Plant with a total of 78.2 mm and 64 % of the long term average. Beaudesert recorded 50 % of the long term average with a total of 57.8 mm and ranked as very low while Brisbane Aero ranked historically as lowest. The lowest total for the main official sites was 19 mm at Redland (Alexandra Hills), while the highest total was 159.4 mm at Cape Moreton Lighthouse which was 127% of the long term average which ranked as high. The site at Brisbane recorded 51.2 mm which ranked as low and was 41% of the long term average. Brisbane Aero recorded the lowest total on record exceeding the old record of 32.8 mm in 2013 and Coomera Foxwell Road also observed record low rainfall of 37 mm with the old record being 63 mm in 2015.

 

Widespread showers occurred at the start of the month with light to moderate falls on the 5th in Brisbane and between the 5th and 10th over northern parts of the Greater Brisbane area. Between the 15th and 17th the remnants of ex-tropical cyclone Owen brought moderate to locally heavy falls. In the last week of the month little rainfall was reported in the Greater Brisbane area.

 

Number of Rain Days: 13 days, 3 lower than this month last year and 2.8 days above average. This is the equal tenth lowest on record and lowest since 10 days in 2013.

 

Highest Daily Total: 36 mm on 17 December 2018. This is the highest for December since 64.5 mm on the 12 December 2010, the fifteenth highest December daily rainfall total on record, the highest daily rainfall total for December since 49.5 mm on 27 December 2010 and the twenty-first highest December daily rainfall total. The highest daily total in the Brisbane area of all official sites was 103 mm at Carneys Creek The Ranch on the 17 December 2018.

 

Monthly Rainfall Total – (automatic gauge) 24 hours to 9am: 62.2 mm (17.9 mm less than official standard gauge and within 22.3%). Highest daily total (automatic gauge, 24 hours to 9am): 27.2 mm on the 17 December 2018, (24 hours from midnight): 36.6 mm on 16 December 2018.

 

Note: This automatic gauge for the month of December, didn’t meet the expected accuracy (of +/- 10% of the standard gauge) of -22.3%. Note: A large proportion of daily totals were of low rainfall amounts, which influenced the accuracy of this data.

 

Late afternoon light showers followed by frequent, brief light to moderate showers with brief heavy falls on the 4th, with 4.8 mm measured on the 5th. The 5th saw light to moderate brief light showers in the late morning and early afternoon with 0.1 mm on the 6th. On the 7th brief light showers in the late morning, late afternoon and late evening with 0.6 mm on the 8th. In the afternoon there was a light few drops with a trace measured on the 9th. Light showers in the early morning and mild thunderstorms with mostly light falls on the evening on the 14th. In the early hours of the 15th there was light to moderate showers in the early morning with 0.2 mm on the 14th and 5 mm on the 15th. Drizzle was in the late afternoon followed by light evening showers, followed by light showers in the early hours of the 16th with moderate falls around 5 am. 18.5 mm was measured on the 16th. From the mid morning was light rain at times with brief moderate falls less frequent at times in the afternoon and moderate falls on the evening.

 

On the 17th was frequent light to moderate, briefly heavy showers in the early hours, less frequent in the morning, with light to moderate falls. Showers were more frequent in the afternoon, easing later in the evening. On the 18th was light showers from early hours to early morning with 36 mm on the 17th, 6.8 mm on the 18th and 1 mm on the 19th. On the 21st was a mild thunderstorm with little rain in the early evening, followed by light rain. A mild thunderstorm in the mid evening with light to moderate rain, then light at times for most of the remainder of the day. On the 22nd were light showers in the early hours and early morning with 6.2 mm measured on the 22nd. On the 24th was a early afternoon light shower with 0.1 mm measured on the 25th. Light shower at midnight on the 30th with 0.5 mm measured.

 

There was 1 day with falls of at least 25 mm (equal to same month in 2017) with 7 days of less than 1mm (equal to same month in 2017). Highest rainfall rate was 95.2 mm/hr on the 4 December 2018 at 4:48 PM with the highest hourly total of 8.2 mm on the 16 December 2018 at 5:05 AM.

 

Number of severe thunderstorms: 0

 

Number of thunderstorms: 3 (Mild: 3, Moderate: 0)

 

Number of thunder days: 2 days

 

Number of nearby storms: 2

 

Severe thunderstorms in the Brisbane area: Nil

 

Remarks for month:

• Mostly sunny on the 1st to 3rd and hot on 1st with hot SW to N winds with dry air and hot on the 2nd
• Hazy on the 3rd before a SE wind change
• Cloudy with some showers on the 4th and becoming cloudy with showers on the 5th
• Cool day on the 6th
• Cloudy at times from the morning on the 7th and a cold day with moderately low dew point
• Cloudy early on the 9th clearing during the morning
• Ci clouds on the 11th late in the day and again later on the 12th
• Cloudy with showers and mild thunderstorms on the 14th
• Increasing clouds with showers on the 15th with high relative humidity and moderately high dew point
• Overcast on the 16th and a cold day with showers and rain with high humidity
• Cloudy on the 17th before clearing during the day with further showers and high humidity
• High relative humidity and moderately high dew point over much of the 18th and 19th
• Hot on the 20th with moderately high dew point in the afternoon and evening
• Very hot day and humid on the 21st with a late mild thunderstorm with gusty moderate SW to SSW winds in the early evening with a nearby storm and shifting W to NW with the mild storm
• A gusty S to SW wind change in late afternoon of the 22nd after a hot day with moderately high dew point
• Cool on the 23rd with moderately low dew point
• Cool day on the 24th with fluctuating temperature
• A cool morning on the 25th and 26th
• Mostly sunny on the 27th, mostly in the morning
• Mostly sunny on the 31st

Weather influences

• On the 1st weak high pressure systems extended a dry air mass across the state
• A surface trough shifted east on the 2nd, reaching the region late in the day, with a hot and dry air mass ahead of the trough. This brought some showers and thunderstorms which struggled to reach the coast
• On the 3rd the surface trough shifted north-eastwards early in the day allowing a southerly change to extend north with the surface trough stalling over Double Island Point
• A surface trough on the 4th extended over the interior while the coastal trough decayed later in the day near Fraser Island with some instability
• A strong high pressure system in the Tasman Sea shifted east into the Tasman Sea on the 5th and extended a ridge along the east coast of the state with onshore winds
• The high pressure system became slow moving in the Tasman Sea maintains a firm ridge and moist onshore winds between the 6th and 10th
• Between the 11th and 13th the high pressure system maintained a weakening ridge along the coast with fine weather
• On the 13th a developing upper trough over south-eastern Australia, along with a surface trough over the interior with some instability
• The ridge decayed on the 14th as the surface trough shifted eastwards over the state. This trough extends south to a deep low over southeastern Australia and extends a upper trough and unstable conditions
• On the 15th Tropical Cyclone Owen crossed the south-eastern Gulf of Carpentaria coast and extends deep tropical moisture into eastern Queensland ahead of the surface trough remaining across the state
• On the 16th a high pressure system in the Tasman Sea extends a ridge and moist onshore flow onto the coast. This brought showers in combination with the persistent trough over the interior
• The ridge and moist onshore flow persisted on the 17th and 18th to the south of Ex Tropical Cyclone Owen near the Mackay coast and maintain a moist and unstable air mass
• On the 19th a high pressure maintained a ridge and onshore flow, with Ex Tropical Cyclone Owen weakening before the ridge decayed on the 20th
• A trough entered western Queensland on the 20th extending hot and dry air to its east
• On the 21st the surface trough shifted further eastwards with a hot air mass. Late in the day the coastal section of the trough shifted northwards through the region
• On the 22nd a coastal trough shifted northwards over the coast reaching Fraser Island later in the evening, followed by a cool and gusty southerly change. A unstable and moist air mass was produced by the coastal trough combined with the persisting inland trough
• On the 23rd a high pressure system shifted eastwards and extended moist onshore flow and a ridge with stable conditions
• The high pressure system became slow moving from the 24th to the 31st with the ridge and onshore flow remaining

Daily weather notes

• 1/12/18: Fine and hot. Mostly sunny with some cu clouds from morning. Light NNW to NNE winds early before increasing hot SW to N winds from midday followed by cooler SSE to SE winds from 2 pm and for the rest of the day. Low dew point and relative humidity in the early afternoon with the hot winds before returning to normal.
• 2/12/18: Fine, a hot day and very hazy. A mostly sunny day with some cu clouds from the morning. Light NNW to WNW winds early becoming WNW to ENE from the early morning and moderate winds in the early afternoon. Winds shifted to light SSE to ENE from the early afternoon and variable in the evening.
• 3/12/18: Fine and hazy. Mostly sunny with cu clouds from morning. Light and variable winds in the early hours before a SE wind change with SSE to ENE winds from early morning easing in the evening. Wind speed increased slightly ahead of the change with a rise in temperature and relative humidity before falling with the change. Temporary rise in dew point also with the change.
• 4/12/18: Becoming cloudy with sc and as clouds from the morning. Fine until late afternoon light showers followed by frequent, brief light to moderate showers with brief heavy falls. Thunder in the late evening. High relative humidity in the evening. Light WSW to S winds in the early morning becoming SSE to NE from the mid morning and shifting S to SE in the evening.
• 5/12/18: Light to moderate brief light showers in the late morning and early afternoon. Morning sc and cu clouds increasing to cloudy periods from later in the morning. Moderately low dew point in the evening and high relative humidity during the late morning and afternoon. Light and variable winds early becoming SW to SE in the early morning and ESE to SE from mid morning. Winds moderate to times in the afternoon, then light SSW to SE winds in the evening.
• 6/12/18: Partly cloudy with cu clouds from morning. A cool day. Light S to SW winds, shifting S to SE in the early morning and then SSE to SE from mid morning. In the evening winds was light S to SE.
• 7/12/18: Light brief showers in the late morning, late afternoon and late evening. Partly cloudy becoming cloudy at times from the morning with cu clouds. Light SSE to SSW winds early, shifting to SSE to SE from early morning and SSW to SE in the evening. A cold day and moderately low dew point.
• 8/12/18: Fine and partly cloudy with cu clouds from morning. Light few drops of rain in afternoon. Light SE winds shifting to S to SW by early morning, shifting back to SE from mid morning and SW to SE from the mid evening.
• 9/12/18: Cloudy early becoming partly cloudy from the morning with cu clouds, easing in the afternoon. Fine day. Light SW to W winds shifting during the early morning to ESE to SE from mid morning becoming SE to ENE in the late afternoon with SSE to ENE light winds in the evening.
• 10/12/18: Partly cloudy with cu clouds from morning. Fine day. Light S to SW winds in the early morning, becoming SSE to NE and ENE to NNE in the evening.
• 11/12/18: Fine and partly cloudy with cu clouds with ci clouds late in the day. Light and variable winds early becoming WSW to S in the early morning and then SSE to ENE for rest of the day.
• 12/12/18: Fine. Partly cloudy with cu clouds from morning and ci clouds late in the day. Light SSE to NE winds from early morning, becoming SSE to NE from late afternoon and ENE to N during the evening. Moderately low dew point in the early afternoon.
• 13/12/18: Fine. Partly cloudy with cu, ci and cs clouds. Light N to ENE winds from early morning and moderate in the mid afternoon.
• 14/12/18: Cloudy with ns early, clearing to cu during the morning before increasing ci, cs and cb during the afternoon from distant thunderstorms. Light showers in the early morning and mild thunderstorms with mostly light falls in the evening. Light ENE to N winds and moderate in the mid afternoon.
• 15/12/18: Light to moderate showers in the early hours. Drizzle in the late afternoon. Light evening showers. Partly cloudy with cu and sc clouds increasing during the day. Light and variable winds early becoming N to ENE in the morning and ENE to NE from the afternoon. Moderately high dew point in the late morning and early afternoon. High relative humidity.
• 16/12/18: Light showers in early hours, moderate around 5 am. Light rain at times from mid morning with brief moderate falls less frequent at times in the afternoon, and moderate falls in the evening. Thunder in the mid morning. Cloudy all day with ns clouds. A cold day with very sluggish temperature movement. Light E to NE winds, S to SE in early morning, early afternoon and late afternoon. Very high relative humidity, especially during the day. Moderately high dew point.
• 17/12/18: Frequent light to moderate, briefly heavy showers in the early hours, less frequent in the morning, with light to moderate falls. Showers more frequent in the afternoon, easing later in the evening. Cloudy with ns clouds early clearing to partly cloudy with cu clouds from late morning and cloudy during the afternoon. Moderately high dew point in the morning and early afternoon and high relative humidity. Light and variable winds becoming SE to NE from mid morning and SSE to SE in evening.
• 18/12/18: Light showers in the early hours to mid morning. Fine thereafter. Partly cloudy with cu clouds. Light S to SE winds becoming SSE to ENE from late morning. Moderately high dew point from mid morning and late afternoon. High relative humidity over the entire day.
• 19/12/18: Fine. Partly cloudy with cu clouds. Light and variable winds becoming SSE to N from early morning and ENE to N in the evening. Moderately high dew point from mid morning to mid afternoon. High relative humidity especially during daylight hours of the day.
• 20/12/18: Fine. Partly cloudy with cu clouds clearing during the morning and then sunny. Light N to ENE winds early becoming SE to NE in the afternoon, before ENE to N winds in the evening and variable in the late evening. A hot day. Moderately high dew point in the afternoon and evening.
• 21/12/18: Nearby thunderstorm in late afternoon with gusty winds. Mild thunderstorm with little rain in early evening, followed by light rain. Mild thunderstorm in the mid evening with light to moderate rain, then light at times for most of the remainder of the day. Light and variable winds becoming N to ENE from morning. Gusty moderate SW to SSW winds in early evening (nearby storm), shifting W to NW (mild thunderstorm) before light and variable winds. Very hot day and humid.
• 22/12/18: Light showers in the early hours and early morning. Fine for the rest of the day. Light and variable winds, tending mostly WNW to NNE in the morning and WNW to N from late morning. Winds shifting N to ENE from mid afternoon before a gusty S to SE wind change at 5:10 pm. S to SE light winds in the evening. A hot day before cooling quickly with the change (falling 8 ºC in 20 min). Moderately high dew point falling with the change and below average later in the evening.
• 23/12/18: Fine and a cool day. Partly cloudy from morning with cu clouds. Moderately low dew point over the day. Light SSE to SW winds early, shifting SW to SE in the early morning and SSE to SE later in the morning. Winds in the late evening then shifted to SW to SSE.
• 24/12/18: Fine except for an early afternoon light shower. Partly cloudy with cu clouds and cloudy at times. Light SSW to SW winds shifting during the morning becoming E to SE from mid morning and then shifting S to SE in the evening and then calm in the late evening. A cool day with fluctuating temperature. Moderately low dew point early in the day, before recovering.
• 25/12/18: Fine. Partly cloudy with cu clouds from morning. A cool morning. Light and variable winds early becoming WSW to SSW in the early morning, shifting S to ENE from mid morning and then SE to ENE from late morning. E to NE winds in late afternoon and early morning before easing. Moderately low dew point early in the day and in the late evening, otherwise near average.
• 26/12/18: A cool morning. Fine and partly cloudy with cu clouds. Light winds becoming S to SW in the early morning, shifting SSE to NE during the morning, S to SE from early afternoon and them E to NE in the evening before easing late in the evening. Moderately low dew point during the day except for the first half of the morning.
• 27/12/18: Fine. Mostly sunny with some cu clouds, mostly in the morning. Moderately low dew point in the early hours, in the early morning and at times over the rest of the day. Light S to SW winds in the early morning, shifting SW to SE in the mid morning and SE to NE from later in the morning. In the afternoon winds was light SSE to E easing in the evening.
• 28/12/18: Fine. Partly cloudy with cu clouds. Light S to SW winds in the early morning, shifting SSE to SE in the early morning and S to ENE from mid morning. Light SE to E from mid afternoon and easing in evening. Moderately low dew point during the morning, some of the afternoon and the evening.
• 29/12/18: Fine. Partly cloudy with cu clouds from morning. Light WSW to SSW winds in the early morning, shifting during the morning to SE to ENE by late morning. Later in the evening winds became E to ENE before easing. Moderately low dew point in the early hours, before returning to near average, then falling and becoming moderately low in the early afternoon before rising again to near average for the rest of the day.
• 30/12/18: Light shower at midnight and fine for rest of the day. Partly cloudy with cu clouds. Light and variable winds early, shifting SE to NE from early morning, ESE to NE from late afternoon and easing E to NE winds in the evening.
• 31/12/18: Fine. Mostly sunny with cu clouds easing during the day. Moderately low dew point over first half of the afternoon before recovering. Light SE to NE from early morning, with less SE winds in the afternoon and SSE to ENE from late afternoon before easing in the evening.

Station records for December 2018

NOTE: Most of these records are from the official station record of this site. Some may be derived from the automatic record. See end notes for more information.

 

 

Other records for December 2018

NOTE: These records are from automatic data record for this site. See end notes for more information.

 

 

 

Data summary tables for the December 2018