Melbourne Metropolitan Area and Environs in June 2012:

Wet, with days slightly on the cool side, nights slightly on the mild side.

Melbourne climate summary for the month of June 2012

Rainfall more than that usually received.

Located in the Central District at the head of Port Phillip Bay, Melbourne is Victoria's State Capital. Here, overnight minimum temperatures were warmer than those usually experienced and averaged 8C (departure from normal 1.1C). 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 near to those usually experienced and averaged 14.4C (departure from normal 0.3C). Total rainfall for the month was 70.2 mm, this being more than that usually recorded (normal 49.2 mm, percentage of normal received 143%).

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 slightly warmer than those usually experienced and averaged 6.4C (departure from normal 0.5C). Daytime maximum temperatures were near to those usually experienced and averaged 13.7C (departure from normal 0.0C). Total rainfall for the month was 53.2 mm, this being more than that usually recorded (normal 39.0 mm, percentage of normal received 136%).

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 slightly warmer than those usually experienced and averaged 6.4C (departure from normal 0.6C). Daytime maximum temperatures were slightly cooler than those usually experienced and averaged 13.7C (departure from normal -0.5C). Total rainfall for the month was 69.2 mm, this being much more than that usually recorded (normal 38.3 mm, percentage of normal received 181%).

In the suburb of Bundoora, which is located some 20 kilometres to the northeast of the city centre, overnight minimum temperatures were near to those usually experienced and averaged 6.2C (departure from normal 0.1C). Daytime maximum temperatures were slightly cooler than those usually experienced and averaged 13.4C (departure from normal -0.5C). Total rainfall for the month was 58.4 mm, this being close to that usually recorded (normal 55.3 mm, percentage of normal received 106%).

In the suburb of Moorabbin, which is located some 20 kilometres to the southeast of the city centre, overnight minimum temperatures were near to those usually experienced and averaged 6.7C (departure from normal 0C). Daytime maximum temperatures were near to those usually experienced and averaged 13.9C (departure from normal -0.3C). Total rainfall for the month was 97.6 mm, this being much more than that usually recorded (normal 56.1 mm, percentage of normal received 174%).

Some 20 kilometres northwest of the Melbourne city centre, and located in a somewhat rural setting, Melbourne Airport, is typical of the Central District. Here, overnight minimum temperatures were near to those usually experienced and averaged 5.9C (departure from normal -0.3C). Daytime maximum temperatures were near to those usually experienced and averaged 13.4C (departure from normal -0.2C). Total rainfall for the month thus far was 55.8 mm, this being more than that usually recorded (normal 37.8 mm, percentage of normal received 148%).

Rainfall

Some sites had their highest total June rainfall on record.

Some sites had their highest total June rainfall for at least 10 years.

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Extremes in June 2012
Hottest day 17.7 C at Melbourne Regional Office on the 1st
Warmest days on average 14.4 C at Melbourne Regional Office
Coolest days on average 13.2 C at Cranbourne Botanic Gardens
Coldest day 9.5 C at Cranbourne Botanic Gardens on the 21st
Coldest night -2.0 C at Coldstream on the 12th
-2.0 C at Coldstream on the 20th
Coolest nights on average 4.1 C at Coldstream
Warmest nights on average 8.0 C at Melbourne Regional Office
Warmest night 11.4 C at Melbourne Regional Office on the 25th
Warmest on average overall 11.2 C at Melbourne Regional Office
Coolest on average overall 8.9 C at Coldstream
Wettest overall 138.8 mm at Cranbourne Botanic Gardens
Highest wind gust 83 km/h at Melbourne Airport on the 20th

Record highest total June rainfall
Total rainfall
for June 2012 (mm)
Previous wettest
for June
Years of
record
Average for
June
Avalon Airport 90.8 82.6 in 1977 33 37.0

Highest total June rainfall for at least 10 years
Total rainfall
for June 2012 (mm)
Most recent June
at least this wet
Years since
wetter
Average for
June
Cranbourne Botanic Gardens 138.8 176.8 in 1991 21 79.1
Laverton RAAF 69.2 96.8 in 1991 21 38.3
Melbourne Airport 55.8 =55.8 in 1996 16 37.8
Melbourne Regional Office 70.2 71.4 in 1996 16 49.2



Summary statistics for June 2012
Maximum temperatures
for June
(C)
Minimum temperatures
for June
(C)
Rainfall
for June
(millimetres)
Mean for
June
2012
Diff
from
average
Highest for
June
2012
Mean for
June
2012
Diff
from
average
Lowest for
June
2012
Total for
June
2012
Average
for
June
Rank of
June
2012
Fraction of
June
average
Avalon Airport 13.8 -1.0 16.4 16th 6.0 +0.2 0.2 27th 90.8 37.0 highest 245%
Bundoora (Latrobe University) 13.4 -0.5 16.2 13th 6.2 +0.1 0.5 12th 58.4 55.3 average 106%
Cerberus 13.5 -0.6 16.2 13th 6.7 -0.1 0.6 12th 109.8 72.0 high 153%
Coldstream 13.7 -0.3 17.4 13th 4.1 +0.1 -2.0 12th 76.6 66.1 average 116%
Cranbourne Botanic Gardens 13.2 -0.8 16.6 13th 6.6 -0.1 0.7 12th 138.8 79.1 v high 175%
Essendon Airport 13.7 0.0 16.9 12th 6.4 +0.5 0.6 12th 53.2 39.0 high 136%
Laverton RAAF 13.7 -0.5 16.7 12th 6.4 +0.6 0.2 12th 69.2 38.3 v high 181%
Melbourne Airport 13.4 -0.2 16.7 13th 5.9 -0.3 0.4 27th 55.8 37.8 high 148%
Melbourne Regional Office 14.4 +0.3 17.7 1st 8.0 +1.1 3.4 12th 70.2 49.2 high 143%
Moorabbin Airport 13.9 -0.3 17.1 13th 6.7 0.0 0.5 12th 97.6 56.1 v high 174%
Scoresby Research Institute 13.8 +0.3 16.8 1st 6.3 0.0 0.3 27th 100.6 69.2 high 145%
Viewbank 13.8 -0.7 17.0 1st 6.1 -0.2 0.5 20th 57.4 51.0 average 113%

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 11 am on Monday 2 July 2012. 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
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