Melbourne Metropolitan Area in November 2011: warm with record rainfall

  • Rainfall very much above average, highest on record at several stations
  • Average maximum and minimum temperatures warmer than normal but no record breakers.

Rainfall

Rainfall totals for November around Melbourne were very much wetter than normal. About half of the stations in the area recorded rainfall totals close to, or more than, twice their usual rainfall for the month. The wettest station overall was Viewbank (ARPANSA) with 163.0 mm. Viewbank was one of the stations that observed their highest total November rainfall on record. The driest station overall was Melbourne Regional Office with 107.2 mm. The wettest single day was the 27th when Avalon Airport observed 85.2 mm, its highest November daily rainfall on record.

Temperature

The average mean temperature (an average of the maximum and minimum temperatures) around Melbourne was warmer than usual. The warmest station on average was Melbourne Regional Office with 19.3 C, whilst the coolest was Cerberus with 16.9 C. No temperature records were broken by stations around Melbourne during November 2011.

Maximum temperature

Average maximum temperatures were warmer than usual for the month. Most stations recorded average maximum temperatures that were between 1 C and 2 C warmer than normal. However, there were several stations that recorded average maximum temperatures more than 2 C warmer than usual. The hottest day was the 18th when Avalon Airport recorded 36.0 C. The warmest days on average were recorded at Melbourne Regional Office with 24.5 C, whilst Cerberus recorded the coolest days on average with 22.0 C. The coldest day was the 2nd when Avalon Airport recorded 15.3 C.

Minimum temperature

Average minimum temperatures around Melbourne were warmer than usual during November. Most stations recorded average minimum temperatures that were between 1 C and 2 C warmer than normal. Melbourne Regional Office and Coldstream recorded average minimum temperatures almost 3 C warmer than usual. The coldest night was the 5th when Laverton RAAF recorded 5.2 C. The coolest nights on average were at Avalon Airport with 11.4 C, whilst Melbourne Regional Office recorded the warmest nights on average with 14.1 C. The warmest night was the 19th when Melbourne Regional Office recorded with 18.7 C.

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Extremes in November 2011
Hottest day 36.0 C at Avalon Airport on the 18th
Warmest days on average 24.5 C at Melbourne Regional Office
Coolest days on average 22.0 C at Cerberus
Coldest day 15.3 C at Avalon Airport on the 2nd
Coldest night 5.2 C at Laverton RAAF on the 5th
Coolest nights on average 11.4 C at Avalon Airport
Warmest nights on average 14.1 C at Melbourne Regional Office
Warmest night 18.7 C at Melbourne Regional Office on the 19th
Warmest on average overall 19.3 C at Melbourne Regional Office
Coolest on average overall 16.9 C at Cerberus
Wettest overall 163.0 mm at Viewbank (ARPANSA)
Driest overall 107.2 mm at Melbourne Regional Office
Wettest day 85.2 mm at Avalon Airport on the 27th
Highest wind gust 93 km/h at Melbourne Airport on the 18th

Record highest November daily rainfall
Highest daily rainfall
in November 2011 (mm)
Previous wettest
for November
Years of
record
Avalon Airport 85.2 on the 27th 46.6 on the 4th in 2007 31
Cranbourne Botanic Gardens 45.7 on the 27th 36.8 on the 13th in 2004 22
Coldstream 36.4 on the 27th 34.0 on the 12th in 1998 18
Viewbank (ARPANSA) 52.2 on the 27th 48.2 on the 22nd in 2009 12



Record highest total November rainfall
Total rainfall
for November 2011 (mm)
Previous wettest
for November
Years of
record
Average for
November
Avalon Airport 141.4 120.8 in 2010 31 50.2
Cerberus 109.0 102.0 in 1988 22 55.1
Cranbourne Botanic Gardens 156.0 123.6 in 1992 21 77.8
Viewbank (ARPANSA) 163.0 144.6 in 2004 11 85.6


Summary statistics for November 2011
Maximum temperatures
for November
(C)
Minimum temperatures
for November
(C)
Rainfall
for November
(millimetres)
Mean for
November
2011
Diff
from
average
Highest for
November
2011
Mean for
November
2011
Diff
from
average
Lowest for
November
2011
Total for
November
2011
Average
for
November
Rank of
November
2011
Fraction of
November
average
East Central (district 86)
Bundoora (Latrobe University) 23.6 +1.2 33.2 18th 12.4 +1.7 7.4 5th 143.9 71.6 v high 201%
Cerberus 22.0 +1.7 33.6 29th 11.7 +1.1 6.0 17th 109.0 55.1 highest 198%
Coldstream 23.7 +1.1 32.4 18th 11.5 +2.9 5.3 24th 146.4 73.5 high 199%
Cranbourne Botanic Gardens 22.7 +1.7 32.9 18th 11.8 +1.4 6.1 5th 156.0 77.8 highest 201%
Essendon Airport 23.6 +2.0 34.0 18th 12.3 +2.5 6.7 5th 110.8 59.5 high 186%
Melbourne Airport 23.4 +1.5 34.0 18th 12.0 +1.7 6.8 17th 109.0 63.9 high 171%
Melbourne Regional Office 24.5 +2.6 35.0 18th 14.1 +2.9 10.1 5th 107.2 60.4 high 177%
Moorabbin Airport 23.1 +1.6 33.9 18th 12.9 +1.9 6.7 5th 129.0 63.7 v high 203%
Scoresby Research Institute 23.5 +2.2 33.2 18th 12.0 +1.7 6.9 17th 136.8 82.1 high 167%
Viewbank (ARPANSA) 23.8 -0.6 33.6 18th 12.4 +1.0 7.2 17th 163.0 85.6 highest 190%
West Central (district 87)
Avalon Airport 23.2 +1.0 36.0 18th 11.4 +0.8 5.5 17th 141.4 50.2 highest 282%
Laverton RAAF 23.4 +1.9 35.1 18th 11.9 +1.8 5.2 5th 117.0 53.2 v high 220%

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 2 pm on Thursday 1 December 2011. 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

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