Greater Brisbane in winter 2018: record warm days

Winter rainfall across the Greater Brisbane area was below average at most locations, apart from offshore Island locations. Daytime temperatures were very warm overall, and the warmest on record at some locations. Overnight temperatures were cooler than usual.

Some showers and storms, but dry overall

  • A very dry start to winter, with little to no rain falling in the first week of June; this was followed by brief onshore showers associated with a surface trough
  • In the last week of June, an upper trough and an associated rain band produced moderate falls over Greater Brisbane
  • Persistent shower activity at the start of July saw the bulk of July's rain falling in the first half of the month, with near-average totals recorded

Warm winter days, record warm at places

  • Overall, winter mean maximum temperatures were much warmer than average, and record warm at some locations; Brisbane reported its second-warmest winter on record in terms of mean maximum temperatures, with 23.4 °C ( 0.1 °C below the record of 23.5 °C set in 2017)
  • Overnight temperatures in winter were generally cooler than average, except at offshore Island locations
  • Daytime temperatures in Greater Brisbane were warmer than average in June, while overnight temperatures were mixed; much cooler than usual June nights occurred at inland locations
  • July days were very warm; Brisbane, Amberley, Archerfield and Logan reported their warmest July mean maximum temperature on record; July nights were warmer than usual at most locations
  • During August, daytime temperatures were warmer than usual, but nights were generally cooler than average

Brisbane

  • Total rainfall for Brisbane was 80.8 mm, which is 62% of the long-term average of 130.2 mm
  • The mean daily maximum temperature for Brisbane was 23.4 °C, which is 1.0 °C above the long-term average of 22.4 °C. The warmest day was 29.5 °C on 16 Aug, and the coolest day was on 27 Jun when the temperature reached 16.9 °C
  • The mean daily minimum temperature for Brisbane was 10.6 °C, which is 0.4 °C below the long-term average of 11.0 °C. The coldest morning was 5.2 °C on 15 Jul, and the warmest morning was on 7 Jul when the minimum temperature was 18.2 °C

Further information

Media
(03) 9669 4057
Enquiries

Extremes in winter 2018
Hottest day 30.1 °C at Amberley AMO on 16 Aug
Warmest days on average 24.1 °C at Amberley AMO
Coolest days on average 20.6 °C at Cape Moreton Lighthouse
Coldest day 15.8 °C at University of Queensland Gatton on 27 Jun
Coldest night -3.8 °C at Beaudesert Drumley Street on 21 Aug
Coolest nights on average 4.2 °C at Amberley AMO
Warmest nights on average 14.8 °C at Cape Moreton Lighthouse
Warmest night 21.1 °C at Point Lookout on 25 Aug
Warmest on average overall 18.3 °C at Point Lookout
Coolest on average overall 14.1 °C at Amberley AMO
Wettest overall 308.2 mm at Point Lookout
Driest overall 24.3 mm at Harrisville Mary Street
Wettest day 82.0 mm at Point Lookout on 2 Jul
Strongest wind gust 78 km/h at Cape Moreton Lighthouse on 7 Jun

Lowest winter total rainfall for at least 20 years

Observed
(mm)
Most recent
lower
Average for
winter
Mt Tamborine Fern St 75.8 68.0 in 1994* 235.3

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported




Record highest winter mean daily maximum temperature

New record
(°C)
Old
record
Years of
record
Average for
winter
Amberley AMO 24.1 24.0 in 1942 76 21.9
Archerfield Airport 23.5 = 23.5 in 2017 43 21.8
Logan City Water Treatment Plant 23.1 = 23.1 in 2017 25 21.9



Record highest winter daily minimum temperature

New record
(°C)
Old
record
Years of
record
Average for
winter
Point Lookout 21.1 on 25 Aug 20.6 on 8 Jun 2002 22 14.1



Lowest winter mean daily minimum temperature for at least 20 years

Observed
(°C)
Most recent
lower
Average for
winter
University of Queensland Gatton 5.3 5.0 in 1982* 6.8

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported




Summary statistics for winter 2018

Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
winter
2018
Diff
from
average
Highest for
winter
2018
Mean for
winter
2018
Diff
from
average
Lowest for
winter
2018
Total for
winter
2018
Average
for
winter
Rank of
winter
2018
Fraction of
winter
average
Amberley AMO 24.1 +2.2 30.1 16 Aug 4.2 -2.0 -3.4 21 Aug 31.0 113.1 low 27%
Archerfield Airport 23.5 +1.7 29.6 16 Aug 7.7 -0.7 0.9 19 Jul 52.6 151.3 v low 35%
Beaudesert Drumley Street 23.8 +1.8 29.6 17 Aug 5.3 -1.4 -3.8 21 Aug 49.0 104.5 v low 47%
Beerburrum Forest Station 23.1 +0.9 29.8 16 Aug 9.1 -0.8 3.4 14 Aug 101.4 185.1 low 55%
Brisbane 23.4 +1.0 29.5 16 Aug 10.6 -0.4 5.2 15 Jul 80.8 130.2 low 62%
Brisbane Aero 22.1 +0.7 27.4 16 Aug 9.6 -0.3 3.3 21 Aug 68.0 137.7 low 49%
Cape Moreton Lighthouse 20.6 +1.1 25.3 17 Aug 14.8 +1.0 10.5 21 Aug 236.8 325.2 low 73%
Logan City Water Treatment Plant 23.1 +1.2 29.4 16 Aug 9.0 -0.5 2.6 21 Aug 102.5 153.6 low 67%
Point Lookout 22.3 +0.7 27.0 17 Aug 14.4 +0.3 8.4 18 Jun 308.2 337.6 average 91%
Redcliffe     28.8 16 Aug 11.4 -0.3 5.6 15 Jul 95.2 149.1 low 64%
Redland (Alexandra Hills) 21.7   26.8 17 Aug 10.2   5.6 21 Aug 108.2


University of Queensland Gatton 23.7 +2.3 29.1 16 Aug 5.3 -1.5 -3.6 15 Jul 33.4 104.6 low 32%

Notes

The Seasonal climate summary, generally published on the first working day of each month, lists the main features of the weather in Greater Brisbane using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This summary includes data from observing sites in or near the Greater Brisbane “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 8 am on Monday 3 September 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
Enquiries