Melbourne area in December 2013: Mostly normal

The Melbourne area in December 2013 was characterised by:

  • close to average rainfall for most suburbs
  • typical daytime temperatures
  • mostly normal overnight temperatures.

Average rainfall

Rainfall was mostly close to normal for December. The wettest station overall was Ferny Creek in the Dandenong Ranges of Melbourne's east with 94.2 mm but Coldstream was the wettest compared to normal, reporting 123% of their typical December rainfall. The driest overall was Avalon Airport on the western plains with 23.4 mm but Bundoora (La Trobe University) was the driest compared to normal, reporting 56% of their typical December rainfall. The wettest single day was the 6th when Coldstream recorded 31.6 mm in cold and unstable south-westerly flow.

Overall temperatures close to normal

Mean temperatures (the average of minimum and maximum temperatures) were mostly normal for December. Melbourne Regional Office was the warmest station on average with 19.5 C and Ferny Creek was the coolest with 15.9 C.

Near average daytime temperatures

Daytime temperatures have been close to normal in the Melbourne area. The hottest day was the 19th when Avalon Airport recorded 41.1 C but Viewbank recorded the warmest days on average with 25.0 C. All stations in the Melbourne area recorded their hottest temperatures for the month on the 19th under the influence of warm northerly winds. The coldest day was the 5th when Ferny Creek recorded 11.4 C and Ferny Creek also recorded the coolest days on average with 21.3 C.

Typical overnight temperatures

Overnight temperatures were mostly average for December. The coldest night was the 30th when Coldstream recorded 2.2 C and Coldstream recorded the coolest nights on average with 10.1 C. The warmest night was the 20th when Ferny Creek recorded 23.8 C but Melbourne Regional Office recorded the warmest nights on average with 14.3 C.

Wind

The strongest wind gust was 104 km/h recorded at Laverton RAAF on the 28th.

Further information

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Extremes in December 2013
Hottest day 41.1 C at Avalon Airport on the 19th
Warmest days on average 25.0 C at Viewbank
Coolest days on average 21.3 C at Ferny Creek
Coldest day 11.4 C at Ferny Creek on the 5th
Coldest night 2.2 C at Coldstream on the 30th
Coolest nights on average 10.1 C at Coldstream
Warmest nights on average 14.3 C at Melbourne Regional Office
Warmest night 23.8 C at Ferny Creek on the 20th
Warmest on average overall 19.5 C at Melbourne Regional Office
Coolest on average overall 15.9 C at Ferny Creek
Wettest overall 94.2 mm at Ferny Creek
Driest overall 23.4 mm at Avalon Airport
Wettest day 31.6 mm at Coldstream on the 6th
Highest wind gust 104 km/h at Laverton RAAF on the 28th

Summary statistics for December 2013
Maximum temperatures
for December
(C)
Minimum temperatures
for December
(C)
Rainfall
for December
(millimetres)
Mean for
December
2013
Diff
from
average
Highest for
December
2013
Mean for
December
2013
Diff
from
average
Lowest for
December
2013
Total for
December
2013
Average
for
December
Rank of
December
2013
Fraction of
December
average
East Central (district 86)
Bundoora (Latrobe University) 24.6 -0.1 40.0 19th 12.5 +0.2 6.7 6th 35.5 63.9 low 56%
Cerberus 22.3 0.0 37.7 19th 12.0 +0.2 6.2 7th 61.4 53.1 average 116%
Coldstream 24.9 0.0 38.4 19th 10.1 +0.5 2.2 30th 68.4 55.6 high 123%
Cranbourne Botanic Gardens 23.0 -0.3 35.0 19th 11.5 -0.1 7.1 6th 59.0 65.3 average 90%
Essendon Airport 24.9 +0.5 40.1 19th 12.4 +0.7 6.1 6th 35.0 51.2 average 68%
Ferny Creek 21.3 34.8 19th 10.4 4.6 6th 94.2
Melbourne (Olympic Park) Comparison 23.7 39.2 19th 13.9 8.2 6th 40.6
Melbourne Airport 24.7 +0.3 39.3 19th 11.9 -0.1 6.2 6th 34.6 48.5 average 71%
Melbourne Regional Office 24.7 +0.5 39.9 19th 14.3 +1.4 7.9 6th 38.6 59.2 average 65%
Moorabbin Airport 23.7 -0.1 38.9 19th 13.0 +0.4 7.1 1st 60.6 59.1 average 103%
Scoresby Research Institute 24.3 +0.4 38.3 19th 12.2 +0.4 5.3 30th 76.2 76.0 average 100%
Viewbank 25.0 -0.4 39.9 19th 12.6 +0.2 6.0 6th 44.8 67.0 low 67%
West Central (district 87)
Avalon Airport 24.8 +0.8 41.1 19th 11.3 -0.3 5.6 7th 23.4 29.5 average 79%
Laverton RAAF 24.3 +0.5 40.3 19th 12.0 0.0 5.9 6th 38.0 45.9 average 83%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Melbourne area 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 Thursday 2 January 2014. 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