Canberra in April 2015: Wettest April since 1990

  • Wettest April since 1990
  • Coolest days since 1999
  • Above average minimum temperatures

Canberra Airport recorded 91.8 mm of rain during April 2015, double its historical average. This is the wettest April since 1990, and the tenth-wettest April on record. The rain fell over 11 days, the most since 2009 (average 7 days), with most of the rain falling over the 7th and 8th associated with an East Coast Low off the south coast. The airport recorded 53.2 mm of rain to 9am on the 8th, the wettest April day since 64.8 mm fell on 30 April 1988, with 90.2 mm recorded at Tharwa.

Daytime temperatures were 0.6 °C below average at Canberra Airport, making it the coolest April since 1999, with very cool days on the 20th and 21st and a cool end to the month. Temperatures dropped to 13.8 °C on the 21st, the coolest April day since 11.7 °C on 24 April 2012, while daytime temperatures as low as 1.7 °C at Mt Ginini contributed to snow in the Brindabellas. In contrast, nights were 0.5 °C warmer than average, with mean temperatures consequently close to the historical average.

Further information

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Extremes in April 2015
Hottest day 26.6 °C at Canberra Airport on the 1st
26.6 °C at Canberra Airport on the 16th
Warmest days on average 19.4 °C at Canberra Airport
Coolest days on average 10.0 °C at Mount Ginini AWS
Coldest day 1.7 °C at Mount Ginini AWS on the 20th
Coldest night -1.9 °C at Mount Ginini AWS on the 20th
Coolest nights on average 3.4 °C at Mount Ginini AWS
Warmest nights on average 7.8 °C at Tuggeranong (Isabella Plains) AWS
Warmest night 13.8 °C at Tuggeranong (Isabella Plains) AWS on the 17th
Warmest on average overall 13.3 °C at Canberra Airport
Coolest on average overall 6.7 °C at Mount Ginini AWS
Wettest overall 138.0 mm at Tharwa General Store
Driest overall 91.8 mm at Canberra Airport
Wettest day 90.2 mm at Tharwa General Store on the 8th
Strongest wind gust 87 km/h at Mount Ginini AWS on the 8th

Record highest April daily rainfall
New record
(mm)
Old
record
Years of
record
Tharwa General Store 90.2 on the 8th 78.0 on the 9th in 1945 72

Summary statistics for April 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2015
Diff
from
average
Highest for
April
2015
Mean for
April
2015
Diff
from
average
Lowest for
April
2015
Total for
April
2015
Average
for
April
Rank of
April
2015
Fraction of
April
average
Canberra Airport 19.4 -0.6 26.6 16th 7.2 +0.5 -0.8 27th 91.8 46.0 high 200%
Mount Ginini AWS 10.0 -1.6 17.7 2nd 3.4 -0.2 -1.9 20th 120.4 62.7 high 192%
Tuggeranong (Isabella Plains) AWS 18.5 -2.5 26.4 16th 7.8 +1.1 0.4 29th 96.8 35.9 high 270%

Daily maximum temperatures for April 2015
123456789101112131415161718192021222324252627282930
Canberra Airport26.625.516.516.623.019.216.615.718.920.622.322.120.821.321.926.618.922.716.814.913.818.423.417.817.417.916.016.517.916.6
Mount Ginini AWS16.317.713.59.111.67.77.95.89.911.012.913.713.711.513.816.611.210.26.31.74.08.812.77.98.18.38.47.08.05.7
Tuggeranong (Isabella Plains) AWS25.624.916.016.020.818.515.514.918.419.421.421.320.019.919.726.417.421.815.412.713.517.523.017.716.317.316.116.216.516.0
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 April 2015
123456789101112131415161718192021222324252627282930
Canberra Airport6.611.711.711.89.85.45.34.97.66.86.06.96.35.67.07.413.011.27.36.68.110.29.412.24.54.2-0.82.70.85.2
Mount Ginini AWS6.59.85.86.46.24.32.2-0.61.11.83.95.24.64.47.08.16.38.01.5-1.9-1.20.23.96.51.80.9-1.7-1.4-0.62.2
Tuggeranong (Isabella Plains) AWS7.812.211.011.011.55.07.24.99.69.84.77.16.55.87.78.013.812.87.16.88.19.912.612.14.56.01.93.00.46.4
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 April 2015
123456789101112131415161718192021222324252627282930
Canberra (Australian National Botanic Ga - - - - - 0.2 14.4 51.6 - - - - 1.4 - - 1.2 6.0 5.4 4.4 2.2 -
Canberra Airport - - - - - 0.4 15.6 53.2 - - - - - - - 1.6 5.6 5.4 5.2 2.2 - - 0.2 0.4 - 2.0 - - - -
Mount Ginini AWS - - - - - 2.4 22.8 50.4 - - - - 1.8 - - 3.8 5.0 9.2 6.6 3.4 - - - 7.2 4.8 3.0 - - - -
Nicholls (Gungahlin Lakes) - - - - - 2.8 13.8 46.6 - - - - - - - 2.2 4.6 5.8 10.0 3.0 - 0.3 - 1.0 - 5.2



Tharwa General Store - - - - - - 20.0 90.2 - - - - - - - - 6.4 10.2 - - - - 3.2 - - 8.0



Torrens (Darke St) - - - - - - - - - 76.0 - - 1.6 5.4 6.8 3.8 0.8 - - 0.4 3.4 - 1.0



Tuggeranong (Isabella Plains) AWS - - - - 0.2 0.2 19.2 65.0 - - - - 0.4 - - 1.0 1.6 7.2 2.0 - - - - - - - - - - -
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

As of March 2010, the official station for Canberra is 70351 'Canberra Airport'. Averages from the previous site, 70014 Canberra Airport Comparison, are used for comparisons.

A Monthly Climate Summary is prepared to list the main features of the weather in Canberra 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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Friday 1 May 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
Enquiries