Brisbane in July 2015: Dry with cold days

Brisbane had below-average rainfall in July. Some cold days and nights were experienced in the middle of the month, with warmer days occurring near the end of the month.

  • A rather dry July
  • Cool days through the month, especially on the 17th
  • Cold nights between the15th and 19th

Rainfall was below-average across the metropolitan area, due to the lack of rain-bearing systems throughout the month, although July is typically a dry month for Brisbane. There were several days of rain during July, though daily totals were no greater than 10 mm. Brisbane's wettest days were to 9am on the 22nd and 23rd due to the presence of a surface trough and upper level disturbance over southern Queensland.

Mean maximum temperatures were cooler than average for July, with all metropolitan sites recording below-average mean minima. Logan City had its lowest July mean daily maximum temperature on record. Warmer days were experienced near the end of the month,with the warmest day occurring on the 26th. 

Mean minimum temperatures were slightly below average at most metropolitan sites. There were several cold nights experienced throughout the month, with the longest span of cold nights occurring between the 15th and 19th. During this period, a strong cold front brought cool and dry air into the southeast, causing overnight temperatures to drop below 0 C at Amberley on the 15th, 18th and 19th. 

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Extremes in July 2015
Hottest day 25.1 C at Brisbane on the 26th and at Amberley on the 31st
Warmest days on average 21.3 C at Amberley 
Coolest days on average 19.9 C at Redcliffe
Coldest day 15.2 C at Amberley on the 17th
Coldest night -1.8 C at Amberley on the 18th
Coolest nights on average 4.9 C at Amberley
Warmest nights on average 10.6 C at Redcliffe
Warmest night 16.8 C at Redcliffe on the 25th
Warmest on average overall 15.7 C at Brisbane
Coolest on average overall 13.1 C at Amberley 
Wettest overall 21.2 mm at Mt Nebo Post Office
Driest overall 4.6 mm at Archerfield Airport
Wettest day 8.8 mm at Logan City Water Treatment Plant on the 23rd
Strongest wind gust 76 km/h at Archerfield Airport and Brisbane Aero, both on the 17th

Record lowest July mean daily maximum temperature
New record
(C)
Old
record
Years of
record
Average for
July
Logan City Water Treatment Plant 20.6 20.7 in 2008 22 21.4



Summary statistics for July 2015
Maximum temperatures
(C)
Minimum temperatures
(C)
Rainfall
(millimetres)
Mean for
July
2015
Diff
from
average
Highest for
July
2015
Mean for
July
2015
Diff
from
average
Lowest for
July
2015
Total for
July
2015
Average
for
July
Rank of
July
2015
Fraction of
July
average
Amberley AMO 21.3 +0.1 25.1 31st 4.9 -0.4 -1.8 18th 8.0 38.2 low 21%
Archerfield Airport 21.1 -0.1 24.5 24th 7.9 +0.3 2.4 15th 4.6 47.8 low 10%
Brisbane 21.1 -0.8 25.1 26th 10.2 +0.1 5.4 15th 9.2 23.7 low 39%
Brisbane Aero 20.3 -0.6 24.0 26th 9.4 +0.4 4.5 15th 11.8 29.3 average 40%
Logan City Water Treatment Plant 20.6 -0.8 24.3 6th 8.8 +0.1 4.0 15th 19.2 34.7 low 55%
Redcliffe 19.9 -0.7 23.6 31st 10.6 -0.4 6.2 15th 8.8 29.2 low 30%

Daily maximum temperatures for July 2015
12345678910111213141516171819202122232425262728293031
Amberley AMO23.020.620.321.322.924.622.820.920.819.422.918.517.819.917.517.115.219.019.921.421.119.423.324.124.824.023.923.021.622.825.1
Archerfield Airport23.020.520.021.422.924.022.520.521.320.921.718.317.919.517.317.915.619.119.721.820.618.123.024.524.224.223.520.921.323.224.3
Brisbane23.319.620.721.322.824.123.020.419.420.221.218.318.219.218.217.416.119.419.320.921.618.723.124.424.325.122.921.421.722.824.1
Brisbane Aero22.820.019.720.521.622.521.520.119.419.220.717.617.418.917.119.015.717.319.220.120.419.021.823.323.624.023.119.620.420.623.2
Logan City Water Treatment Plant23.520.719.321.423.124.322.018.617.720.421.918.917.919.717.918.616.118.519.120.620.117.421.923.223.724.122.420.021.222.023.5
Redcliffe21.619.619.019.922.123.221.619.118.118.521.217.817.818.816.518.916.517.118.819.419.919.021.322.123.521.622.518.919.620.523.6
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for July 2015
12345678910111213141516171819202122232425262728293031
Amberley AMO7.94.7-0.64.44.43.02.41.47.02.56.69.63.97.7-0.83.52.5-1.8-0.44.54.33.512.013.815.29.56.76.71.04.83.4
Archerfield Airport9.111.45.47.36.46.27.55.19.45.49.510.56.58.02.44.35.35.14.78.17.57.612.213.215.910.512.58.55.18.05.4
Brisbane12.412.27.89.99.79.310.27.011.99.711.412.28.410.25.47.66.96.98.211.710.610.112.914.116.513.113.510.07.810.29.7
Brisbane Aero11.99.95.49.18.78.59.77.710.98.79.811.87.49.54.56.16.45.26.310.710.510.212.413.516.112.012.010.18.19.78.3
Logan City Water Treatment Plant11.19.55.08.99.68.08.16.510.68.410.010.96.47.54.06.45.34.26.99.810.49.011.013.115.212.110.68.26.411.08.2
Redcliffe12.910.76.811.29.49.510.810.212.510.210.812.38.89.16.26.86.26.88.111.812.711.914.615.016.813.114.810.99.39.29.8
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 C Grey outline marks highest
and lowest for the period

Daily rainfall for July 2015
12345678910111213141516171819202122232425262728293031
Alderley 1.0 0.4 0.8 0.8 2.0 2.8
Amberley AMO - - - - - - - - - - - - - - - -
- - - 0.4 0.6 2.0 - 4.8 0.2 - - - - -
Archerfield Airport - - - - - - - - - - 0.4 1.4 - - - - - - - - - 1.4 0.8 0.2 0.2 0.2 - - - - -
Boondall - - - - - - - - - - - 0.8 - - - - - - - 0.6 0.4 1.4 5.6 0.2 - - - - - - -
Brisbane 0.2 - - - - - - - - 0.2 0.4 0.6 0.2 - - - - - - - 0.2 2.8 4.4 - - 0.2 - - - - -
Brisbane Aero - - - - - - - - - - 0.8 2.4 - - - - - - - - - 6.2 2.4 - - - - - - - -
Brisbane Botanic Gardens Mt Coot-Tha - - - - - - - - - - 1.0 1.5 - - - - - - - - 0.4 2.2 6.4 - 0.4





Hilltop Gardens - - - - - - - - - - 0.5 1.8 - - - - - - - - - 5.0 5.8 0.2 - - - - - - -
Logan City Water Treatment Plant - - - - - - - - - - 1.2 0.6 - - - - - - - - 1.6 2.0 8.8 0.4 4.4 0.2 - - - - -
Mt Nebo Post Office - - - - - - - - - 1.8 1.2 4.6 - - - - - - - - 0.4 6.2 3.2 - 3.8 - - - - - -
Redcliffe 0.2 - - - - - - - 2.0 - 0.8 - - - - - - - - 0.2
2.6 3.0 - - - - - - - -
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly 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 12 pm on Saturday 1 August 2015. 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
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