Melbourne Area in August 2013: Warmest nights on record.

The Melbourne area in August 2013 was characterised by:

  • The warmest August night-time temperatures on record
  • Mostly average daytime temperatures
  • Mostly average rainfall.

Rainfall

Rainfall totals were mostly close to normal in the Melbourne area. The exceptions were Cranbourne Botanic Gardens and Coldstream which both had wetter than usual Augusts. The wettest station overall was Cranbourne Botanic Gardens with 121.8 mm whilst the driest was Avalon Airport with 36.8 mm. The wettest single day was the 4th when Bundoora (Latrobe University) recorded 30.0 mm.

Temperature

The warmest station on average (a combination of maximum and minimum temperatures) was Melbourne Regional Office with 12.9 C whilst the coolest on average was Coldstream with 10.7 C.

Maximum temperature

Daytime temperatures were average to above average in the Melbourne area during August. The hottest day was the 31st when Avalon Airport recorded 23.4 C and Melbourne Regional Office recorded the warmest days on average with 16.5 C. The coolest days on average were recorded at Cerberus with 15.0 C and the coldest day was the 20th when Coldstream recorded 10.6 C.

Minimum temperature

Night-time temperatures were the warmest on record at half of the stations in the Melbourne area. The warmest night was the 30th when Melbourne Regional Office recorded 14.6 C and Melbourne Regional Office also recorded the warmest nights on average with 9.3 C. The coldest night was the 20th when Coldstream recorded -0.9 C and Coldstream also recorded the coolest nights on average with 6.0 C.

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Extremes in August 2013
Hottest day 23.4 C at Avalon Airport on the 31st
Warmest days on average 16.5 C at Melbourne Regional Office
Coolest days on average 15.0 C at Cerberus
Coldest day 10.6 C at Coldstream on the 20th
Coldest night -0.9 C at Coldstream on the 20th
Coolest nights on average 6.0 C at Coldstream
Warmest nights on average 9.3 C at Melbourne Regional Office
Warmest night 14.6 C at Melbourne Regional Office on the 30th
Warmest on average overall 12.9 C at Melbourne Regional Office
Coolest on average overall 10.7 C at Coldstream
Wettest overall 121.8 mm at Cranbourne Botanic Gardens
Driest overall 36.8 mm at Avalon Airport
Wettest day 30.0 mm at Bundoora (Latrobe University) on the 4th
Highest wind gust 96 km/h at Essendon Airport on the 12th
96 km/h at Laverton RAAF on the 12th

Record highest August mean daily minimum temperature
Mean daily minimum
temperature
for August 2013 (C)
Previous warmest
for August
Years of
record
Average for
August
Melbourne Regional Office 9.3 9.2 in 2009 158 6.7
Essendon Airport 7.8 7.7 in 2009 43 5.5
Cranbourne Botanic Gardens 7.8 7.7 in 1993 22 6.4
Cerberus 8.3 8.1 in 2009 21 6.6
Avalon Airport 7.2 = 7.2 in 2009 18 5.5
Coldstream 6.0 5.9 in 2009 18 4.4
Viewbank 8.1 8.0 in 2009 13 6.3



Summary statistics for August 2013
Maximum temperatures
for August
(C)
Minimum temperatures
for August
(C)
Rainfall
for August
(millimetres)
Mean for
August
2013
Diff
from
average
Highest for
August
2013
Mean for
August
2013
Diff
from
average
Lowest for
August
2013
Total for
August
2013
Average
for
August
Rank of
August
2013
Fraction of
August
average
East Central (district 86)
Bundoora (Latrobe University) 15.6 +0.7 22.9 29th 7.7 +1.6 4.0 20th 59.4 57.5 average 103%
Cerberus 15.0 +0.3 21.8 31st 8.3 +1.7 3.4 11th 118.8 78.1 high 152%
Coldstream 15.4 +0.6 22.4 28th 6.0 +1.6 -0.9 20th 71.8 68.0 average 106%
Cranbourne Botanic Gardens 15.1 +0.6 22.1 31st 7.8 +1.4 4.9 20th 121.8 81.2 v high 150%
Essendon Airport 15.6 +1.3 22.9 29th 7.8 +2.3 4.1 20th 39.6 48.6 average 81%
Melbourne Airport 15.6 +1.2 22.8 29th 7.2 +1.3 3.5 20th 39.2 46.1 average 85%
Melbourne Regional Office 16.5 +1.5 23.1 29th 9.3 +2.6 5.2 1st 57.0 50.1 average 114%
Moorabbin Airport 15.8 +0.9 22.7 29th 8.4 +1.6 5.6 1st 60.0 65.8 average 91%
Scoresby Research Institute 15.4 +1.2 22.1 29th 7.9 +1.6 3.5 20th 85.4 80.1 average 107%
Viewbank 15.6 +0.4 22.7 29th 8.1 +1.8 2.6 1st 49.0 56.6 average 87%
West Central (district 87)
Avalon Airport 16.2 +0.7 23.4 31st 7.2 +1.7 2.6 21st 36.8 44.2 average 83%
Laverton RAAF 16.1 +1.2 22.7 31st 7.5 +2.0 3.3 21st 44.0 44.7 average 98%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Melbourne Metropolitan Area and Environs 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 Monday 2 September 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 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 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