Melbourne Metropolitan Area and Environs in April 2010:

Exceptionally warm nights; mostly dry.

Summary

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 a record-breaking 14.5C (departure from normal 3.7C; previous record 13.8C in April 1968). Daytime maximum temperatures were also much warmer than those usually experienced and averaged 22.9C (departure from normal 2.6C). Total rainfall for the month was 19.6 mm, this being much less than that usually recorded (normal 57.1 mm, percentage of normal received 34%).

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 12.6C (departure from normal 2.8C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 22.5C (departure from normal 2.5C). Total rainfall for the month was 10.2 mm, this being much less than that usually recorded (normal 54.8 mm, percentage of normal received 19%).

The suburb of Laverton is located some 30 kilometres to the southwest of the city centre.  Here, overnight minimum temperatures were much warmer than those usually experienced and averaged 12.5C (departure from normal 2.7C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 22.5C (departure from normal 2.3C). Total rainfall for the month was 19.2 mm, this being much less than that usually recorded (normal 45.6 mm, percentage of normal received 42%).

In the suburb of Bundoora, which is located some 20 kilometres to the northeast of the city centre, overnight minimum temperatures were much warmer than those usually experienced and averaged 12.6C (departure from normal 3C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 22.3C (departure from normal 1.8C). Total rainfall for the month was 29.1 mm, this being less than that usually recorded (normal 53.4 mm, percentage of normal received 54%).

In the suburb of Moorabbin, which is located some 20 kilometres to the southeast of the city centre, overnight minimum temperatures were much warmer than those usually experienced and averaged 12.9C (departure from normal 2.5C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 21.9C (departure from normal 1.8C). Total rainfall for the month was 65.4 mm, this being close to that usually recorded (normal 62.6 mm, percentage of normal received 104%).

Some sites had their highest April mean daily minimum temperature on record.

Some sites had their highest April mean daily minimum temperature for at least 10 years.

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Record highest April mean daily minimum temperature
Mean daily minimum
temperature
for April 2010 (C)
Previous highest
for April
Years of
record
Average for
April
Melbourne Regional Office 14.5 13.8 in 1968 154 10.8
Laverton RAAF 12.5 12.3 in 1968 66 9.8
Essendon Airport 12.6 12.4 in 1968 41 9.8
Melbourne Airport 12.4 11.6 in 2005 39 10.1
Moorabbin Airport 12.9 12.8 in 1990 38 10.4
Bundoora (Latrobe University) 12.6 11.8 in 1990 27 9.6
Cranbourne Botanic Gardens 12.4 12.1 in 1990 20 10.1
Cerberus 13.1 11.0 in 2002 18 9.7
Ferny Creek (Dunns Hill) 11.4 11.1 in 2005 18 9.3
Avalon Airport 11.9 10.4 in 2003 15 9.3
Coldstream 10.3 7.9 in 2005 15 6.3
Viewbank (ARPANSA) 12.6 11.1 in 2005 10 9.8

Highest April mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for April 2010 (C)
Most recent higher
for April
Years since
higher
Average for
April
Scoresby Research Institute 12.2 12.3 in 1985 23 10.0



Summary statistics for April 2010
Maximum temperatures
for April
(C)
Minimum temperatures
for April
(C)
Rainfall
for April
(millimetres)
Mean for
April
2010
Diff
from
average
Highest for
April
2010
Mean for
April
2010
Diff
from
average
Lowest for
April
2010
Total for
April
2010
Average
for
April
Rank of
April
2010
Fraction of
April
average
Avalon Airport 22.2 +2.1 31.5 20th 11.9 +2.6 4.6 26th 29.8 36.9 average 81%
Bundoora (Latrobe University) 22.3 +1.8 29.4 22nd 12.6 +3.0 6.0 26th 29.1 53.4 average 54%
Cerberus 21.2 +1.6 29.0 20th 13.1 +3.4 8.3 28th 79.4 65.6 average 121%
Coldstream 21.9 +1.7 28.4 20th 10.3 +4.0 3.1 28th 70.2 59.6 average 118%
Cranbourne Botanic Gardens 21.3 +1.5 29.0 20th 12.4 +2.3 7.0 28th 109.8 69.1 high 159%
Essendon Airport 22.5 +2.5 30.9 22nd 12.6 +2.8 5.8 26th 10.2 54.8 v low 19%
Ferny Creek (Dunns Hill) 17.0 +1.1 24.2 20th 11.4 +2.1 5.2 28th 67.4 93.4 average 72%
Laverton RAAF 22.5 +2.3 30.7 22nd 12.5 +2.7 6.1 26th 19.2 45.6 low 42%
Melbourne Airport 22.1 +1.9 29.4 22nd 12.4 +2.3 6.6 26th 17.0 43.8 low 39%
Melbourne Regional Office 22.9 +2.6 30.1 22nd 14.5 +3.7 8.7 26th 19.6 57.1 low 34%
Moorabbin Airport 21.9 +1.8 29.6 20th 12.9 +2.5 8.0 26th 65.4 62.6 average 104%
Scoresby Research Institute 21.5 +1.6 28.2 20th 12.2 +2.2 7.2 26th 49.4 66.3 average 75%
Viewbank (ARPANSA) 22.3 +0.9 29.0 20th 12.6 +2.8 6.4 26th 38.2 52.7 average 72%

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 5 am on Monday 3 May 2010. 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

Media
(03) 9669 4057
Enquiries