Brisbane Metro in July 2013: Warm nights, average rainfall  

  • Warm nights - up to 3 C above the long term monthly average at some sites
  • Brisbane and Brisbane Airport had only one night in July below 10 C (this is a record for both existing sites)
  • Average to higher than average monthly rainfall
  • One daily rainfall record at Brisbane Airport of 40.2 mm on the 2nd
  • Close to average daytime temperatures were recorded

Rainfall

Average to higher than average rainfall was recorded across Brisbane Metro during July. Bayside locations received some moderate falls on the 2nd, due to a low pressure system embedded within a surface trough located off the southern Queensland on the 1st.  Scattered showers, rain areas and isolated thunderstorms developed over the southeast of the state.  The highest daily total was at Brisbane Aero with 40.2 mm, and then at Redcliffe with 26.4 mm, also on the 2nd.

The wettest overall was Brisbane Aero with 93.4 mm, followed by Logan City Water Treatment Plant with 64.8 mm, followed by Redcliffe with 59.4 mm.

The wettest single day was at Brisbane Aero with 40.2 mm on the 2nd, followed by Redcliffe with 26.4 mm on the 2nd, followed by Logan City Water Treatment Plant with 21.1 mm on the 2nd.

Some sites had their highest July daily rainfall on record.

Temperature

The warmest on average was Brisbane with 17.2 C, followed by Redcliffe with 16.8 C, followed by Brisbane Aero with 16.4 C.

The coolest on average was Amberley AMO with 15.0 C, followed by Archerfield Airport with 16.0 C, followed by Logan City Water Treatment Plant with 16.3 C.

Some sites had their highest July mean temperature for at least 20 years.

Maximum temperature

Warmer than usual days across Brisbane Metro at the start of the month, with milder temperatures experienced mid-month. Overall, daytime temperatures were close to average.

The hottest day was at Brisbane with 25.4 C on the 6th, followed by Amberley AMO with 25.3 C on the 5th, followed by Archerfield Airport with 25.1 C on the 5th.

The warmest days on average were at Archerfield Airport with 21.8 C, followed by Brisbane with 21.8 C, followed by Amberley AMO with 21.6 C, followed by Logan City Water Treatment Plant with 21.2 C.

The coolest days on average were at Redcliffe with 20.5 C, followed by Brisbane Aero with 20.8 C, followed by Logan City Water Treatment Plant with 21.2 C.

The coldest day was at Logan City Water Treatment Plant with 16.4 C on the 22nd, followed by Amberley AMO with 16.5 C on the 22nd, followed by Brisbane Aero with 16.7 C on the 10th.

Minimum temperature

Warmer than average overnight temperatures were recorded at all Brisbane Metro sites, despite some individually cool night time temperatures throughout the month. Amberley plummeted to 0.8 C overnight on the 24th, but maintained an average minimum temperature that was 3 C warmer than normal. Brisbane recorded its warmest mean minimum temperature since observations began at the site in 1999, with 12.7 C.  The highest July mean minimum temperature recorded in Brisbane was 13.7 C in 1993.

The coldest night was at Amberley AMO with 0.8 C on the 24th, followed by Archerfield Airport with 4.9 C on the 24th, followed by Amberley AMO with 5.0 C on the 9th, followed by Amberley AMO with 5.0 C on the 31st.

The coolest nights on average were at Amberley AMO with 8.4 C, followed by Archerfield Airport with 10.3 C, followed by Logan City Water Treatment Plant with 11.4 C.

The warmest nights on average were at Redcliffe with 13.0 C, followed by Brisbane with 12.6 C, followed by Brisbane Aero with 12.1 C.

The warmest night was at Brisbane with 16.5 C on the 4th, followed by Brisbane with 16.3 C on the 20th, followed by Brisbane Aero with 16.2 C on the 20th, followed by Redcliffe with 16.2 C on the 20th.

Some sites had their highest July mean daily minimum temperature for at least 20 years.

Wind

The strongest wind gust was at Redcliffe with 54 km/h on the 9th, and on the 20th.

Further information

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Extremes in July 2013
Hottest day 25.4 C at Brisbane on the 6th
Warmest days on average 21.8 C at Archerfield Airport
21.8 C at Brisbane
21.6 C at Amberley AMO
21.2 C at Logan City Water Treatment Plant
Coolest days on average 20.5 C at Redcliffe
20.8 C at Brisbane Aero
21.2 C at Logan City Water Treatment Plant
Coldest day 16.4 C at Logan City Water Treatment Plant on the 22nd
Coldest night 0.8 C at Amberley AMO on the 24th
Coolest nights on average 8.4 C at Amberley AMO
10.3 C at Archerfield Airport
11.4 C at Logan City Water Treatment Plant
Warmest nights on average 13.0 C at Redcliffe
12.6 C at Brisbane
12.1 C at Brisbane Aero
Warmest night 16.5 C at Brisbane on the 4th
Warmest on average overall 17.2 C at Brisbane
Coolest on average overall 15.0 C at Amberley AMO
Wettest overall 93.4 mm at Brisbane Aero
Wettest day 40.2 mm at Brisbane Aero on the 2nd
Highest wind gust 54 km/h at Redcliffe on the 9th
54 km/h at Redcliffe on the 20th

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest July daily rainfall
Highest daily rainfall
in July 2013 (mm)
Previous wettest
for July
Years of
record
Brisbane Aero 40.2 on the 2nd 38.0 on the 25th in 1999 20



Highest July mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for July 2013 (C)
Most recent July
at least this warm
Years since
warmer
Average for
July
Amberley AMO 8.4 10.2 in 1993 20 5.3
Logan City Water Treatment Plant 11.4 11.9 in 1993 20 8.7



Highest July mean temperature for at least 20 years
Mean daily
temperature
for July 2013 (C)
Most recent July
at least this warm
Years since
warmer
Average for
July
Amberley AMO 15.0 16.7 in 1993 20 13.3
Logan City Water Treatment Plant 16.3 17.1 in 1993 20 15.0



Summary statistics for July 2013
Maximum temperatures
for July
(C)
Minimum temperatures
for July
(C)
Rainfall
for July
(millimetres)
Mean for
July
2013
Diff
from
average
Highest for
July
2013
Mean for
July
2013
Diff
from
average
Lowest for
July
2013
Total for
July
2013
Average
for
July
Rank of
July
2013
Fraction of
July
average
Moreton South Coast (district 40)
Amberley AMO 21.6 +0.4 25.3 5th 8.4 +3.1 0.8 24th 20.2 39.1 average 52%
Archerfield Airport 21.8 +0.7 25.1 5th 10.3 +2.8 4.9 24th 32.6 48.7 average 67%
Brisbane 21.8 0.0 25.4 6th 12.6 +2.6 7.9 24th 39.0 25.4 high 154%
Brisbane Aero 20.8 0.0 23.3 6th 12.1 +3.2 6.0 24th 93.4 31.2 high 299%
Logan City Water Treatment Plant 21.2 -0.2 24.4 6th 11.4 +2.7 6.4 24th 64.8 36.7 high 177%
Redcliffe 20.5 -0.1 23.5 20th 13.0 +2.1 8.6 24th 59.4 33.2 high 179%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Brisbane Metro 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, usually published in the fourth week of the month.

This statement has been prepared based on information available at 11 am on Thursday 1 August 2013. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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 9 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 being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
Enquiries