Melbourne area in spring 2013: Warm nights

The Melbourne area in spring 2013 was characterised by:

  • Warmer than usual night-times
  • Daytime temperatures close to normal
  • Typical rainfall totals in most suburbs.

Wet in the southeast

Preliminary data indicates that spring rainfall was close to normal for most parts of Melbourne. The exception was the outer southeast where both Cranbourne Botanic Gardens and Cerberus observed above average totals. The wettest station overall was Cranbourne Botanic Gardens with 330.9 mm and the driest was Avalon Airport in the west with 149.6 mm. The wettest single day was 13 November when Cerberus recorded 43.6 mm

Temperature

The warmest station on average (a combination of maximum and minimum temperatures) was Melbourne Regional Office with 16.1 C, while the coolest was Coldstream with 13.6 C.

Normal daytime temperatures

Daytime temperatures were mostly close to normal for spring. Most stations reported average maximum temperatures within 0.5 C of their long-term mean. The hottest day was 20 October when Avalon Airport recorded 33.5 C. The warmest station on average was Melbourne Regional Office with 20.6 C, while Cerberus recorded the coolest days on average with 18.6 C. The coldest day was 13 November when Cranbourne Botanic Gardens recorded 12.5 C.

Warm nights

Some stations recorded average night-time temperatures very much warmer than usual this spring. At those stations the average minimum temperatures were more than 1.0 C warmer than their long-term mean. The coldest night was 13 September when Coldstream recorded -1.5 C, and Coldstream also recorded the coolest nights on average with 7.5 C. Melbourne Regional Office recorded the warmest nights on average with 11.6 C. The warmest night was 28 November when Essendon Airport and Scoresby Research Institute recorded 22.5 C.

Wind

The strongest wind gust was 117 km/h recorded at Essendon Airport 1 October.

Further information

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Extremes in spring 2013
Hottest day 33.5 C at Avalon Airport on 20 Oct
Warmest days on average 20.6 C at Melbourne Regional Office
Coolest days on average 18.6 C at Cerberus
Coldest day 12.5 C at Cranbourne Botanic Gardens on 13 Nov
Coldest night -1.5 C at Coldstream on 13 Sep
Coolest nights on average 7.5 C at Coldstream
Warmest nights on average 11.6 C at Melbourne Regional Office
Warmest night 22.5 C at Essendon Airport on 28 Nov
22.5 C at Scoresby Research Institute on 28 Nov
Warmest on average overall 16.1 C at Melbourne Regional Office
Coolest on average overall 13.6 C at Coldstream
Wettest overall 330.9 mm at Cranbourne Botanic Gardens
Driest overall 149.6 mm at Avalon Airport
Wettest day 43.6 mm at Cerberus on 13 Nov
Highest wind gust 117 km/h at Essendon Airport on 1 Oct

Summary statistics for spring 2013
Maximum temperatures
for spring
(C)
Minimum temperatures
for spring
(C)
Rainfall
for spring
(millimetres)
Mean for
spring
2013
Diff
from
average
Highest for
spring
2013
Mean for
spring
2013
Diff
from
average
Lowest for
spring
2013
Total for
spring
2013
Average
for
spring
Rank of
spring
2013
Fraction of
spring
average
East Central (district 86)
Bundoora (Latrobe University) 20.1 +0.4 32.8 27 Nov 9.5 +0.6 0.5 13 Sep 213.0 194.7 average 109%
Cerberus 18.6 +0.2 31.9 27 Nov 10.0 +1.1 3.7 8 Sep 271.2 192.5 v high 141%
Coldstream 19.8 0.0 31.2 27 Nov 7.5 +0.5 -1.5 13 Sep 209.4 213.0 average 98%
Cranbourne Botanic Gardens 18.7 -0.1 31.5 27 Nov 9.5 +0.5 2.5 13 Sep 330.9 245.8 high 135%
Essendon Airport 19.8 +0.6 32.2 27 Nov 9.8 +1.6 0.1 13 Sep 188.2 170.7 average 110%
Melbourne Airport 19.7 +0.4 32.7 20 Oct 9.4 +0.8 -0.4 13 Sep 161.2 165.4 average 97%
Melbourne Regional Office 20.6 +1.0 33.1 27 Nov 11.6 +2.0 3.9 13 Sep 193.2 184.5 average 105%
Moorabbin Airport 19.5 +0.3 32.8 27 Nov 10.3 +0.9 1.5 13 Sep 201.2 199.3 average 101%
Scoresby Research Institute 19.6 +0.7 31.6 27 Nov 9.6 +0.7 -0.3 13 Sep 238.8 250.7 average 95%
Viewbank 20.1 -0.4 32.4 27 Nov 9.7 +0.4 0.9 13 Sep 197.6 199.9 average 99%
West Central (district 87)
Avalon Airport 19.9 0.0 33.5 20 Oct 8.8 +0.4 0.4 13 Sep 149.6 147.7 average 101%
Laverton RAAF 19.5 +0.3 32.9 27 Nov 9.5 +1.2 -0.7 13 Sep 161.4 159.2 average 101%

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 1 pm on Monday 2 December 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