Tuesday, 1 October 2013 - Monthly Climate Summary for Melbourne Metropolitan Area and Environs - Product code IDCKGC16L0

Melbourne Area in September 2013: The Hottest September on Record

September 2013 in the Melbourne area was characterised by:

  • The warmest September average maximum and minimum temperatures on record
  • Average to above average rainfall.

Extremes Records Summaries Important notes the top

Maximum temperature

September 2013 average maximum temperatures were the warmest September temperatures on record at almost all stations in the Melbourne area. The hottest day was the 3rd when Bundoora (Latrobe University) recorded 26.0 °C but Melbourne Regional Office recorded the warmest days on average with 20.1 °C. The coldest day was the 12th when Cranbourne Botanic Gardens recorded 12.6 °C but Cerberus recorded the coolest days on average with 18.2 °C.

Minimum temperature

Most stations in the Melbourne area had their warmest September average minimum temperatures during September 2013. The coldest night was the 13th when Coldstream recorded -1.5 °C and Coldstream also recorded the coolest nights on average with 6.9 °C. The warmest night was the 5th when Melbourne Regional Office recorded 19.7 °C and Melbourne Regional Office also recorded the warmest nights on average with 11.2 °C.

Temperature

The warmest station on average (a combination of maximum and minimum temperatures) was Melbourne Regional Office with 15.6 °C whilst the coolest on average was Coldstream with 13.0 °C.

Rainfall

Rainfall totals in the Melbourne area ranged from close to average to above average for September. The wettest station overall was Cranbourne Botanic Gardens in the east with 138.2 mm whilst the driest was Avalon Airport in the west with 53.0 mm. The wettest single day was the 26th when Melbourne Regional Office recorded 31.4 mm.

Wind

The strongest wind gust was at Avalon Airport with 102 km/h on the 26th.

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Extremes in September 2013
Hottest day 26.0 °C at Bundoora (Latrobe University) on the 3rd
Warmest days on average 20.1 °C at Melbourne Regional Office
Coolest days on average 18.2 °C at Cerberus
Coldest day 12.6 °C at Cranbourne Botanic Gardens on the 12th
Coldest night -1.5 °C at Coldstream on the 13th
Coolest nights on average 6.9 °C at Coldstream
Warmest nights on average 11.2 °C at Melbourne Regional Office
Warmest night 19.7 °C at Melbourne Regional Office on the 5th
Warmest on average overall 15.6 °C at Melbourne Regional Office
Coolest on average overall 13.0 °C at Coldstream
Wettest overall 138.2 mm at Cranbourne Botanic Gardens
Driest overall 53.0 mm at Avalon Airport
Wettest day 31.4 mm at Melbourne Regional Office on the 26th
Highest wind gust 102 km/h at Avalon Airport on the 26th

Extremes Records Summaries Important notes the top


Record highest September mean daily maximum temperature
Mean daily maximum
temperature
for September 2013 (°C) 		Previous warmest
for September		 Years of
record		 Average for
September
Melbourne Regional Office 20.1 19.7 in 2006 158 17.2
Scoresby Research Institute 19.1 18.7 in 2001 56 16.4
Essendon Airport 19.2 19.0 in 2008 43 16.7
Melbourne Airport 19.1 19.0 in 1972 43 16.6
Moorabbin Airport 19.1 18.8 in 1972 42 16.8
Bundoora (Latrobe University) 20.0 19.0 in 2006 30 16.9
Cranbourne Botanic Gardens 18.4 = 18.4 in 1998 22 16.4
Cerberus 18.2 18.0 in 2001 21 16.3
Avalon Airport 19.2 = 19.2 in 2002 18 17.6
Coldstream 19.1 18.6 in 2006 18 17.1
Viewbank 19.5 19.0 in 2006 13 17.7


Record highest September mean daily minimum temperature
Mean daily minimum
temperature
for September 2013 (°C) 		Previous warmest
for September		 Years of
record		 Average for
September
Melbourne Regional Office 11.2 10.7 in 2001 158 8.0
Laverton RAAF 9.1 8.6 in 1980 69 6.6
Essendon Airport 9.4 8.2 in 2009 43 6.6
Melbourne Airport 9.1 8.4 in 1999 43 7.0
Bundoora (Latrobe University) 8.8 8.7 in 1981 30 7.2
Cranbourne Botanic Gardens 9.3 8.8 in 1998 22 7.7
Cerberus 9.7 8.7 in 2000 21 7.5
Avalon Airport 8.3 7.7 in 1999 18 6.6
Viewbank 9.3 8.5 in 2000 13 7.7

Extremes Records Summaries Important notes the top

Summary statistics for September 2013
Maximum temperatures
for September
(°C)		 Minimum temperatures
for September
(°C)		 Rainfall
for September
(millimetres)
Mean for
September
2013		 Diff
from
average		 Highest for
September
2013		 Mean for
September
2013		 Diff
from
average		 Lowest for
September
2013		 Total for
September
2013		 Average
for
September		 Rank of
September
2013		 Fraction of
September
average
East Central (district 86)
Bundoora (Latrobe University) 20.0 +3.1 26.0 3rd 8.8 +1.6 0.5 13th 66.0 58.9 average 112%
Cerberus 18.2 +1.9 25.7 4th 9.7 +2.2 3.7 8th 96.4 67.7 high 142%
Coldstream 19.1 +2.0 24.7 3rd 6.9 +1.4 -1.5 13th 75.0 71.1 average 105%
Cranbourne Botanic Gardens 18.4 +2.0 24.0 23rd 9.3 +1.6 2.5 13th 138.2 87.4 high 158%
Essendon Airport 19.2 +2.5 24.4 3rd 9.4 +2.8 0.1 13th 74.4 51.1 high 146%
Melbourne Airport 19.1 +2.5 24.6 3rd 9.1 +2.1 -0.4 13th 68.6 47.0 high 146%
Melbourne Regional Office 20.1 +2.9 24.8 25th 11.2 +3.2 3.9 13th 83.8 58.1 high 144%
Moorabbin Airport 19.1 +2.3 25.6 4th 9.6 +1.6 1.5 13th 69.0 65.6 average 105%
Scoresby Research Institute 19.1 +2.7 25.0 3rd 9.2 +1.7 -0.3 13th 80.0 84.0 average 95%
Viewbank 19.5 +1.8 25.2 4th 9.3 +1.6 0.9 13th 76.0 56.2 high 135%
West Central (district 87)
Avalon Airport 19.2 +1.6 25.5 4th 8.3 +1.7 0.4 13th 53.0 46.4 average 114%
Laverton RAAF 19.0 +2.0 23.9 4th 9.1 +2.5 -0.7 13th 65.0 49.4 high 132%

Extremes Records Summaries Important notes the top

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 12 pm on Tuesday 1 October 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
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