Melbourne Metropolitan Area and Environs in February 2013:

Rainfall more than that usually received;

Lengthy warm and sunny periods.

Melbourne CBD

Located in the Central District at the head of Port Phillip Bay, Melbourne is Victoria's State Capital. Here, overnight minimum temperatures were much warmer than those usually experienced and averaged 17.6C (departure from normal 3C). That the overnight temperatures in Melbourne are higher than those in most surrounding localities is a consequence of the city being under the influence of the effect of urbanisation (cities are usually warmer than their rural surroundings, especially at night, because of heat stored in bricks and concrete and trapped between close-packed buildings). Daytime maximum temperatures were much warmer than those usually experienced and averaged 29.2C (departure from normal 3.4C). Total rainfall for the month was 70.4 mm, this being more than that usually received (normal 48.1 mm, percentage of normal received 146%).

Selected Melbourne suburbs

In the suburb of Essendon, which is located some 15 kilometres to the northwest of the city centre, overnight minimum temperatures were much warmer than those usually experienced and averaged 15.8C (departure from normal 2C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 28.8C (departure from normal 3.2C). Total rainfall for the month was 59 mm, this being slightly more than that usually received (normal 47.2 mm, percentage of normal received 125%).

The suburb of Laverton is located some 30 kilometres to the southwest of the city centre, and is often under the drying influence of the rain shadow from the ranges of western Victoria. Here, overnight minimum temperatures were warmer than those usually experienced and averaged 15.5C (departure from normal 1.3C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 27.4C (departure from normal 1.9C). Total rainfall for the month was 53.4 mm, this being slightly more than that usually received (normal 47.4 mm, percentage of normal received 113%).

In the suburb of Bundoora, which is located some 20 kilometres to the northeast of the city centre, overnight minimum temperatures were slightly warmer than those usually experienced and averaged 15.1C (departure from normal 0.9C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 29.1C (departure from normal 2.4C). Total rainfall for the month was 81.3 mm, this being much more than that usually received (normal 45 mm, percentage of normal received 181%).

In the suburb of Moorabbin, which is located some 20 kilometres to the southeast of the city centre, overnight minimum temperatures were warmer than those usually experienced and averaged 15.5C (departure from normal 1.2C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 28.5C (departure from normal 2.5C). Total rainfall for the month was 61 mm, this being more than that usually received (normal 46.9 mm, percentage of normal received 130%).

Some 20 kilometres northwest of the Melbourne city centre, at Melbourne Airport, overnight minimum temperatures were warmer than those usually experienced and averaged 15.3C (departure from normal 1.2C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 29C (departure from normal 2.5C). Total rainfall for the month was 54.6 mm, this being slightly more than that usually received (normal 44.4 mm, percentage of normal received 123%).

Records

Some sites had their highest February mean daily maximum temperature for at least 10 years.

Extremes in February 2013
Hottest day 38.7 C at Avalon Airport on the 18th
Warmest days on average 30.7 C at Coldstream
Coolest days on average 26.8 C at Cerberus
Coldest day 18.2 C at Cranbourne Botanic Gardens on the 1st
Coldest night 5.0 C at Coldstream on the 2nd
Coolest nights on average 12.6 C at Coldstream
Warmest nights on average 17.6 C at Melbourne Regional Office
Warmest night 22.2 C at Melbourne Regional Office on the 25th
Warmest on average overall 23.4 C at Melbourne Regional Office
Coolest on average overall 20.8 C at Cerberus
Wettest overall 89.8 mm at Scoresby Research Institute
Highest wind gust 72 km/h at Melbourne Airport on the 18th

Highest February mean daily maximum temperature for at least 10 years
Mean daily maximum
temperature
for February 2013 (C)
Most recent February
at least this warm
Years since
warmer
Average for
February
Melbourne Regional Office 29.2 30.1 in 2000 13 25.8
Scoresby Research Institute 29.8 29.9 in 2000 13 26.4


Extremes Records Summaries Important notes the top

Summary statistics for February 2013
Maximum temperatures
for February
(C)
Minimum temperatures
for February
(C)
Rainfall
for February
(millimetres)
Mean for
February
2013
Diff
from
average
Highest for
February
2013
Mean for
February
2013
Diff
from
average
Lowest for
February
2013
Total for
February
2013
Average
for
February
Rank of
February
2013
Fraction of
February
average
Avalon Airport 28.0 +1.9 38.7 18th 15.3 +0.9 8.6 2nd 54.0 35.3 high 153%
Bundoora (Latrobe University) 29.1 +2.4 37.2 6th 15.1 +0.9 9.0 5th 81.3 45.0 high 181%
Cerberus 26.8 +1.9 36.6 18th 14.9 +0.6 8.6 5th 49.6 41.5 high 120%
Coldstream 30.7 +3.3 38.1 25th 12.6 +0.6 5.0 2nd 70.0 57.8 average 121%
Cranbourne Botanic Gardens 27.9 +2.4 36.5 7th 14.1 +0.1 9.1 1st 53.1 53.7 average 99%
Essendon Airport 28.8 +3.2 37.5 6th 15.8 +2.0 10.1 1st 59.0 47.2 high 125%
Laverton RAAF 27.4 +1.9 37.4 18th 15.5 +1.3 10.6 1st 53.4 47.4 high 113%
Melbourne Airport 29.0 +2.5 37.2 6th 15.3 +1.2 8.8 1st 54.6 44.4 high 123%
Melbourne Regional Office 29.2 +3.4 37.2 6th 17.6 +3.0 12.2 1st 70.4 48.1 high 146%
Moorabbin Airport 28.5 +2.5 37.0 6th 15.5 +1.2 10.2 2nd 61.0 46.9 high 130%
Scoresby Research Institute 29.8 +3.4 36.9 6th 14.6 +0.8 7.6 2nd 89.8 54.2 high 166%
Viewbank 30.2 +3.0 37.4 6th 15.3 +0.7 10.1 2nd 85.8 54.0 high 159%

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 4 am on Friday 1 March 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.


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