Greater Brisbane in autumn 2018: Seasonal rainfall close to average   

Autumn rainfall in Greater Brisbane was close to average at most locations, except for sites located inland. Autumn daytime temperatures were generally above average. Overnight temperatures were also above average at all locations, except for Amberley.

Near average rainfall at most locations

  • Autumn rainfall was close to the long-term average at most locations, apart from sites located further inland
  • It was a very wet March across most of Greater Brisbane, with above average rainfall near the bay, and persistent rain through the month
  • April rainfall was below average, with all locations recording less than 75% of their April average
  • Rainfall was generally below to well below average across Greater Brisbane for May

Warmer than usual autumn days

  • Autumn mean maximum temperatures were above average at all Greater Brisbane locations, with inland locations reporting the highest anomalies
  • Point Lookout had its highest autumn temperature on record
  • During March, mean maximum temperatures were slightly below average, although Archerfield and Gatton had slightly warmer than usual days
  • April had very warm days overall, with a few locations more than a degree above the April average; Gatton's mean maximum temperature was more than two degrees above average
  • All locations in Greater Brisbane had warmer than average daytime temperature during May
  • Mean minimum temperatures for autumn were warmer than average at most locations, except for Amberley
  • March mean minimum temperatures were warmer than usual at all locations and more than a degree above average at Archerfield
  • Overnight temperatures during April were warmer than usual at most locations, except Gatton and Amberley
  • In May, overnight temperatures were slightly warmer than average, except for inland locations, where overnight temperatures were cooler than usual

Brisbane

  • Total rainfall for Brisbane was 207.8 mm, which is 86% of the long-term average of 243.0 mm
  • The mean daily maximum temperature for Brisbane was 27.1 °C, which is 0.2 °C above the long-term average of 26.9 °C. The warmest day was 34.7 °C on 4 Mar, and the coolest day was on 31 May when the temperature reached 22.0 °C
  • The mean daily minimum temperature for Brisbane was 17.6 °C, which is 0.5 °C above the long-term average of 17.1 °C. The coldest morning was 8.3 °C on 31 May, and the warmest morning was on 2 Mar when the minimum temperature was 24.6 °C

Dangerous surf

  • Tropical cyclone Linda formed well off the Queensland coast on 13 March.  Linda produced large waves, with maximum wave heights of up to 8 metres about the southern Queensland coast, and many beaches south of Fraser Island were closed due to dangerous surf on 14 and 15 March

Frost and fog

  • Frost occurred about Ipswich on 22 May, with the overnight temperature at Amberley dropping to 1.2 °C
  • A blanket of widespread fog affected southeastern Queensland valleys on the morning of 30 May, with pockets of shallow fog reported at Brisbane Airport

Further information

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Extremes in autumn 2018
Hottest day 35.7 °C at University of Queensland Gatton on 1 Mar
Warmest days on average 28.4 °C at University of Queensland Gatton
Coolest days on average 25.9 °C at Redland (Alexandra Hills)
Coldest day 19.1 °C at Cape Moreton Lighthouse on 31 May
Coldest night 1.2 °C at Amberley AMO on 22 May
Coolest nights on average 13.6 °C at Amberley AMO
Warmest nights on average 18.2 °C at Redcliffe
Warmest night 25.6 °C at Point Lookout on 4 Mar
Warmest on average overall 22.4 °C at Brisbane
Coolest on average overall 20.6 °C at Amberley AMO
Wettest overall 516.7 mm at Caloundra Airport
Driest overall 64.0 mm at University of Queensland Gatton
Wettest day 94.0 mm at Toombul Bowls Club on 5 Mar
94.0 mm at Palen Creek Correctional on 6 Mar
Strongest wind gust 91 km/h at Cape Moreton Lighthouse on 28 Apr


Record highest autumn temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Point Lookout 33.0 on 4 Mar = 33.0 on 18 Mar 2017 22 26.3



Summary statistics for autumn 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
autumn
2018
Diff
from
average
Highest for
autumn
2018
Mean for
autumn
2018
Diff
from
average
Lowest for
autumn
2018
Total for
autumn
2018
Average
for
autumn
Rank of
autumn
2018
Fraction of
autumn
average
Amberley AMO 27.7 +0.8 34.8 1 Mar 13.6 -0.3 1.2 22 May 92.8 192.9 low 48%
Archerfield Airport 27.3 +0.8 35.1 1 Mar 15.7 +0.5 6.4 22 May 127.8 277.4 low 46%
Beaudesert Drumley Street 27.6 +1.0 33.8 15 Apr 14.0 +0.3 2.1 31 May 81.2 222.8 v low 36%
Beerburrum Forest Station 26.5 +0.1 34.6 4 Mar 16.4 +0.8 7.9 12 May 308.6 409.6 average 75%
Brisbane 27.1 +0.2 34.7 4 Mar 17.6 +0.5 8.3 31 May 207.8 243.0 average 86%
Brisbane Aero 26.0 +0.1 32.0 4 Mar 17.1 +0.7 7.2 31 May 245.6 280.3 average 88%
Logan City Water Treatment Plant 26.7 +0.4 34.9 1 Mar 16.7 +0.8 7.4 21 May 315.5 313.2 average 101%
Redcliffe 26.0 +0.3 32.3 4 Mar 18.2 +0.6 10.1 31 May 220.0 295.5 average 74%
Redland (Alexandra Hills) 25.9   33.9 4 Mar 17.0   8.3 31 May 273.2
University of Queensland Gatton 28.4 +1.6 35.7 1 Mar 13.7 0.0 3.4 19 May 64.0 173.2 low 37%

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.

In September 2017 this summary was broadened to include 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 10 am on Friday 1 June 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
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