Melbourne Metropolitan Area and Environs in autumn 2010: Warm with near average rainfall

Autumn minimum and maximum temperatures were above average across the Melbourne region, whilst rainfall totals were generally close to the long term average.

Rainfall

Melbourne Regional Office recorded 129.2 mm of rainfall this autumn. This is 34 mm below the long term average of 163.2 mm.

The wettest overall was 241.2 mm at Cranbourne Botanic Gardens and the wettest single day recorded 48.0 mm at Melbourne Airport on 7 March.

Maximum temperature

The mean maximum temperature for Melbourne Regional Office this autumn was 22.4 C, which is 2.1 C above the long term average.

The hottest day was 34.2 C at Laverton RAAF on 17 March, and the warmest days on average were 22.4 C at Melbourne Regional Office.

The coolest days on average were 16.8 C at Ferny Creek (Dunns Hill), and the coldest day was 8.3 C at Ferny Creek (Dunns Hill) on 12 May.

Minimum temperature

The mean minimum temperature for Melbourne Regional Office this autumn was 13.5 C, which is 2.6 C above the long term average.

The coldest night was -2.4 C at Coldstream on 23 May, and the coolest nights on average were 9.2 C at Coldstream.

The warmest nights on average were 13.5 C at Melbourne Regional Office, and the warmest night was 23.0 C at Melbourne Regional Office on 19 March.

Some sites had their highest autumn mean daily minimum temperature on record. Some sites had their highest autumn mean daily minimum temperature for at least 20 years.

Wind

The strongest wind gust was 102 km/h at Melbourne Airport on 6 Mar.

 

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Extremes in autumn 2010
Hottest day 34.2 C at Laverton RAAF on 17 Mar
Warmest days on average 22.4 C at Melbourne Regional Office
Coolest days on average 16.8 C at Ferny Creek (Dunns Hill)
Coldest day 8.3 C at Ferny Creek (Dunns Hill) on 12 May
Coldest night -2.4 C at Coldstream on 23 May
Coolest nights on average 9.2 C at Coldstream
Warmest nights on average 13.5 C at Melbourne Regional Office
Warmest night 23.0 C at Melbourne Regional Office on 19 Mar
Wettest overall 241.2 mm at Cranbourne Botanic Gardens
Wettest day 48.0 mm at Melbourne Airport on 7 Mar
Highest wind gust 102 km/h at Melbourne Airport on 6 Mar

Record highest autumn mean daily minimum temperature
Mean daily minimum
temperature
for autumn 2010 (C)
Previous highest
for autumn
Years of
record
Average for
autumn
Melbourne Regional Office 13.5 13.4 in 2007 154 10.9
Essendon Airport 11.7 11.6 in 2007 40 9.9
Bundoora (Latrobe University) 11.7 11.3 in 2007 26 10.0
Cranbourne Botanic Gardens 11.4 = 11.4 in 1992 20 10.3

Highest autumn mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for autumn 2010 (C)
Most recent autumn
this high or higher
Years since
higher
Average for
autumn
Moorabbin Airport 11.9 12.3 in 1974 36 10.6
Melbourne Airport 11.6 11.7 in 1989 21 10.3



Summary statistics for autumn 2010
Maximum temperatures
for autumn
(C)
Minimum temperatures
for autumn
(C)
Rainfall
for autumn
(millimetres)
Mean for
autumn
2010
Diff
from
average
Highest for
autumn
2010
Mean for
autumn
2010
Diff
from
average
Lowest for
autumn
2010
Total for
autumn
2010
Average
for
autumn
Rank of
autumn
2010
Fraction of
autumn
average
East Central (district 86)
Bundoora (Latrobe University) 21.7 +1.2 33.2 17 Mar 11.7 +1.7 0.5 23 May 140.0 149.2 average 94%
Cerberus 20.8 +1.1 32.7 4 Mar 11.8 +1.7 0.4 22 May 198.6 173.2 average 115%
Coldstream 21.7 +1.1 32.2 18 Mar 9.2 +2.2 -2.4 23 May 205.2 168.2 high 122%
Cranbourne Botanic Gardens 20.9 +1.1 32.5 17 Mar 11.4 +1.1 1.9 23 May 241.2 176.3 v high 137%
Essendon Airport 21.7 +1.7 33.5 17 Mar 11.7 +1.8 0.2 23 May 118.8 143.9 average 83%
Ferny Creek (Dunns Hill) 16.8 +0.7 27.4 17 Mar 10.6 +1.3 4.0 5 May
Melbourne Airport 21.5 +1.2 32.5 17 Mar 11.6 +1.3 2.1 23 May 136.8 121.1 high 113%
Melbourne Regional Office 22.4 +2.1 33.0 17 Mar 13.5 +2.6 4.0 23 May 129.2 163.2 average 79%
Moorabbin Airport 21.3 +1.1 33.1 17 Mar 11.9 +1.3 0.8 22 May 164.6 177.5 average 93%
Scoresby Research Institute 21.3 +1.2 32.0 17 Mar 11.2 +1.0 0.4 23 May 191.8 211.6 average 91%
Viewbank (ARPANSA) 21.9 +0.6 32.8 17 Mar 11.4 +1.4 0.4 22 May 153.2 143.6 average 107%
West Central (district 87)
Avalon Airport 21.7 +1.2 34.1 4 Mar 11.1 +1.4 0.0 23 May 105.4 99.2 average 106%
Laverton RAAF 21.7 +1.5 34.2 17 Mar 11.6 +1.6 0.1 23 May 113.2 127.7 average 89%

Notes

A Seasonal 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 10 am on Tuesday 1 June 2010. 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.

Further information

Media
(03) 9669 4057
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