Thursday, 1 July 2010 - Monthly Climate Summary for Melbourne Metropolitan Area and Environs - Product code IDCKGC2xx0

Melbourne Metropolitan Area and Environs in June 2010

Rainfall slightly 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 slightly warmer than those usually experienced and averaged 7.5°C (departure from normal 0.6°C). Daytime maximum temperatures were also slightly warmer than those usually experienced and averaged 14.6°C (departure from normal 0.6°C). Total rainfall for the month was 58.8 mm, this being slightly more than that usually recorded (normal 49.1 mm, percentage of normal received 120%).

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 near to those usually experienced and averaged 6.1°C (departure from normal 0.2°C). Daytime maximum temperatures were also near to those usually experienced and averaged 13.7°C (departure from normal 0.1°C). Total rainfall for the month was 53.6 mm, this being more than that usually recorded (normal 39.1 mm, percentage of normal received 137%).

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 near to those usually experienced and averaged 5.7°C (departure from normal -0.1°C). Daytime maximum temperatures were also near to those usually experienced and averaged 14.1°C (departure from normal -0.1°C). Total rainfall for the month was 37 mm, this being close to that usually recorded (normal 38 mm, percentage of normal received 97%).

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 6.3°C (departure from normal 0.2°C). Daytime maximum temperatures were slightly cooler than those usually experienced and averaged 13.3°C (departure from normal -0.6°C). Total rainfall for the month was 68.8 mm, this being slightly more than that usually recorded (normal 55.7 mm, percentage of normal received 124%).

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 6.4°C (departure from normal -0.3°C). Daytime maximum temperatures were also near to those usually experienced and averaged 13.8°C (departure from normal -0.4°C). Total rainfall for the month was 72.6 mm, this being slightly more than that usually recorded (normal 55.7 mm, percentage of normal received 130%).

Details Extremes Records Summaries Important notes the top

Rainfall

Some sites had their highest total June rainfall on record.

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

Temperature

Some sites had their coldest June day (lowest maximum temperature) on record.

Other phenomena

The month was characterised by intense high pressure systems over western Australian longitudes, with a ridge stretching eastwards to southeastern Australia.

Occasionally, cells from this feature crossed Victoria, leading to some frosty nights, and also to Melbourne recording its highest June Mean Sea Level pressure (1037.9 hPa at 9am on the 22nd) since June 2000.

That the flow had a southerly component, was responsible for the somewhat above normal rainfall in the Central District.

Further information

Dr Harvey Stern
Climate Meteorologist
Victoria Climate Services Centre
Bureau of Meteorology
Phone (03) 9669 4956
Email climate.vic@bom.gov.au
Extremes in June 2010
Warmest day 18.3 °C at Melbourne Regional Office on the 24th
Warmest days on average 14.6 °C at Melbourne Regional Office
Coolest days on average 8.7 °C at Ferny Creek (Dunns Hill)
Coldest day 4.9 °C at Ferny Creek (Dunns Hill) on the 29th
Coldest night -1.9 °C at Coldstream on the 28th
Coolest nights on average 3.9 °C at Coldstream
Warmest nights on average 7.5 °C at Melbourne Regional Office
Warmest night 13.5 °C at Moorabbin Airport on the 25th
Wettest overall 138.0 mm at Ferny Creek (Dunns Hill)
Highest wind gust 100 km/h at Laverton RAAF on the 17th

Details Extremes Records Summaries Important notes the top

Record highest total June rainfall
Total rainfall
for June 2010 (mm) 		Previous highest
for June		 Years of
record		 Average for
June
Viewbank (ARPANSA) 79.6 68.2 in 2001 11 50.9

Highest total June rainfall for at least 10 years
Total rainfall
for June 2010 (mm) 		Most recent June
this high or higher		 Years since
higher		 Average for
June
Melbourne Airport 47.2 49.2 in 1998 12 37.8
Bundoora (Latrobe University) 68.8 84.2 in 1999 11 55.7


Record lowest June daily maximum temperature
Lowest daily maximum
temperature
in June 2010 (°C) 		Previous lowest
for June		 Years of
record		 Average for
June
Cerberus 8.4 on the 29th 8.8 on the 12th in 1993 19 14.2


Details Extremes Records Summaries Important notes the top

Summary statistics for June 2010
Maximum temperatures
for June
(°C)		 Minimum temperatures
for June
(°C)		 Rainfall
for June
(millimetres)
Mean for
June
2010		 Diff
from
average		 Highest for
June
2010		 Mean for
June
2010		 Diff
from
average		 Lowest for
June
2010		 Total for
June
2010		 Average
for
June		 Rank of
June
2010		 Fraction of
June
average
Avalon Airport 14.2 -0.6 18.1 23rd 5.3 -0.5 -1.1 16th 34.6 35.2 average 98%
Bundoora (Latrobe University) 13.3 -0.6 17.5 24th 6.3 +0.2 0.8 22nd 68.8 55.7 high 124%
Cerberus 13.7 -0.5 17.5 24th 6.2 -0.7 -0.3 16th 102.6 71.0 high 145%
Coldstream 13.1 -0.9 17.9 2nd 3.9 -0.2 -1.9 28th 78.6 65.0 average 121%
Cranbourne Botanic Gardens 13.2 -0.8 17.3 24th 5.8 -0.9 2.5 22nd 110.9 77.0 high 144%
Essendon Airport 13.7 +0.1 17.3 1st 6.1 +0.2 0.9 22nd 53.6 39.1 high 137%
Ferny Creek (Dunns Hill) 8.7 -0.9 12.7 24th 5.3 -0.4 2.3 30th 138.0 91.4 high 151%
Laverton RAAF 14.1 -0.1 17.4 23rd 5.7 -0.1 0.6 22nd 37.0 38.0 average 97%
Melbourne Airport 13.4 -0.2 17.3 23rd 6.0 -0.2 1.4 22nd 47.2 37.8 high 125%
Melbourne Regional Office 14.6 +0.6 18.3 24th 7.5 +0.6 3.6 22nd 58.8 49.1 high 120%
Moorabbin Airport 13.8 -0.4 17.8 24th 6.4 -0.3 0.5 22nd 72.6 55.7 high 130%
Scoresby Research Institute 13.4 -0.1 16.9 1st 5.8 -0.5 0.2 22nd 89.0 69.1 high 129%
Viewbank (ARPANSA) 13.6 -0.9 17.3 1st 5.9 -0.5 0.3 22nd 79.6 50.9 highest 156%

Details Extremes Records Summaries Important notes the top

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 12 pm on Thursday 1 July 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

Dr Harvey Stern
Climate Meteorologist
Victoria Climate Services Centre
Bureau of Meteorology
Phone (03) 9669 4956
Email climate.vic@bom.gov.au