Brisbane in 2015: Temperatures were near average; rainfall above average

Brisbane had near average temperatures for 2015, with a mixture of hot and cold days and nights throughout the year. Rainfall was above average across the metropolitan area. Severe thunderstorms produced large hail and flash flooding during the year.

  • Daytime and overnight temperatures were close to average
  • Rainfall above average in the metropolitan area
  • Ex-tropical cyclone Marcia produced heavy falls between 20 and 22 February
  • Heavy rainfall at Brisbane Airport at the beginning of April
  • Flash flooding from intense low pressure system beginning May
  • Thick fog blanketed Brisbane city on 25 June
  • Severe thunderstorms in January, March, and all spring months 

Brisbane temperatures were close to average for 2015. Both mean maximum and mean minimum temperatures were within 1 C of the long-term average for all metropolitan sites. A warm spell affected the metropolitan area between 15 and 18 January, with the hottest day of the year occurring at Amberley; on 17 January with 39.4 C. In contrast, cold conditions were experienced in mid-July, with very cold nights occurring between 15 and 19 July, including the coldest night of the year which occurred on 18 July at Amberley with-1.8 C. On 17 July, it was the coldest day of the year at all metropolitan stations, where no station exceeded 16.6 C during the day.

Rainfall was above average across the metropolitan area, with the Brisbane site recording its second-wettest year since 2000. Some notable rainfall events during the year included heavy falls between 20 and 22 February due to the remnants of ex-tropical cyclone Marcia tracking over the southeast, with current Brisbane Airport site receiving its highest February rainfall total since records began in 1996. Flash flooding occurred in some south Brisbane suburbs on 21 March, associated with heavy rainfall. Between 1 and 5 April, numerous sites in the metropolitan area recorded daily rainfall totals in excess of 100 mm due to a slow-moving surface trough affecting the southeast. Brisbane Aero recorded its highest April daily rainfall and its highest April rainfall total since records began at the current site in 1996. At the start of May, very heavy rainfall led to flash flooding in northern suburbs of Brisbane as a deepening surface trough and an intense low pressure system formed off the southeast Queensland coast. Bondall and Logan City recorded their highest May daily rainfall on record on 2 May. July, which is typically the driest month of the year in the metropolitan area, was particularly dry, with Archerfield recording 10% of its July average. Above average rainfall was recorded across most of the metropolitan sites for the remaining months of the year.

Some severe thunderstorms affected the metropolitan area throughout the year. Large hail was reported from various Brisbane metropolitan suburbs in January, March, and all spring months. 

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Extremes in 2015
Hottest day 39.4 C at Amberley AMO on 17 Jan
Warmest days on average 27.1 C at Amberley AMO
Coolest days on average 25.1 C at Redcliffe
Coldest day 15.2 C at Amberley AMO on 17 Jul
Coldest night -1.8 C at Amberley AMO on 18 Jul
Coolest nights on average 13.0 C at Amberley AMO
Warmest nights on average 17.0 C at Redcliffe
Warmest night 26.5 C at Brisbane on 19 Jan
Warmest on average overall 21.5 C at Brisbane
Coolest on average overall 20.0 C at Amberley AMO
Wettest overall 1512.6 mm at Boondall
Driest overall 995.8 mm at Amberley AMO
Wettest day 213.6 mm at Boondall on 2 May
Strongest wind gust 91 km/h at Brisbane Aero on 29 Nov


Summary statistics for 2015
Maximum temperatures
(C)
Minimum temperatures
(C)
Rainfall
(millimetres)
Mean
for
2015
Diff
from
average
Highest
for
2015
Mean
for
2015
Diff
from
average
Lowest
for
2015
Total
for
2015
Average
annual
total
Rank
of
2015
Fraction
of annual
average
Amberley AMO 27.1 +0.3 39.4 17 Jan 13.0 -0.1 -1.8 18 Jul 995.8 865.3 high 115%
Archerfield Airport 26.8 +0.6 37.4 18 Jan 15.0 +0.6 2.4 15 Jul 1165.8 1065.3 average 109%
Brisbane 26.4 -0.1 36.7 25 Jan 16.6 +0.3 5.4 15 Jul 1445.4 1021.6 high 141%
Brisbane Aero 25.3 0.0 36.3 15 Jan 16.0 +0.4 4.5 15 Jul 1270.0 1059.7 high 120%
Logan City Water Treatment Plant 26.1 +0.1 37.5 5 Mar N/A  N/A  3.9 5 Jun 1292.2 1097.8 average 118%
Redcliffe 25.1 -0.1 36.6 15 Jan 17.0 +0.1 6.2 15 Jul 1465.6 1087.6 high 134%

Notes

The Annual climate summary lists the main features of the weather in Brisbane using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 8 am on Wednesday 6 January 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries

Climate

Service notice

Network problems on 8 January disrupted processing of observations, affecting some climate information. Missing data are being retrieved and will be processed into our systems over coming weeks.