Monday, 1 September 2008 - Monthly Climate Summary for Victoria - Product code IDCKGC26R0

Victoria in August 2008
An unusually cool August

After a series of relatively warm Augusts, August 2008 saw temperatures well below the long-term (all years of record) normal. Overnight temperatures were mostly about one degree  below normal whilst daytime temperatures were mostly about one and a half degrees below the long-term normal. Rainfall was close to the long-term normal in most Districts and there was some minor flooding in the Northeast on the 31st. The below normal temperatures that have occurred in August 2008 are not inconsistent with the long-term warming trend which has been observed in recent decades. Even with this warming trend, relatively cool periods are still occurring, but less frequently than hitherto.

In the Melbourne CBD, the average minimum temperature was 7.3 deg C (0.6 deg C above the long-term average over all years of record), whilst the average maximum temperature was 14.7 deg C (only 0.2 deg C below the long-term average). Total August rainfall was 43.8 mm (87% of the long-term average total).

The reason for the relatively mild conditions in the CBD is on account of what is known as the "heat island effect", a feature of the inner areas of most major cities.  This effect occurs on account of the ability of the buildings and roads to absorb heat (and then to re-radiate it back into the atmosphere) more effectively than grassland and forest. This point is effectively illustrated by the fact that away from the city centre at Melbourne Airport, average temperatures were well below the long-term normals, the average August 2008  minimum temperature being 5.2 deg C (0.6 deg C below the long-term average), whilst the average August 2008 maximum temperature was 13.4 deg C (1.0 deg C below the long-term average).

Further information

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

Summaries

This table is very wide and may not fit if printed.

Summary statistics for August 2008
Maximum temperatures
for August
(°C)
Minimum temperatures
for August
(°C)
Rainfall
for August
(millimetres)
Mean for
August
2008
Diff
from
normal
Highest for
August
2008
Mean for
August
2008
Diff
from
normal
Lowest for
August
2008
Total for
August
2008
Normal
for
August
Rank of
August
2008
Fraction of
August
normal
North Mallee (district 76)
Mildura Airport 15.6 −1.6 20.9 29th 4.4 −0.8 0.7 23rd 33.2 26.8 average 124%
Ouyen 15.2 −1.9 20.3 29th 4.0 −1.1 1.2 23rd 39.2 32.8 average 120%
Walpeup Research 14.8 −1.5 20.7 29th 3.9 −1.4 −0.6 23rd 32.8 35.0 average 94%
South Mallee (district 77)
Hopetoun Airport 14.5   20.1 29th 2.3   −3.9 23rd 28.6
Swan Hill Aerodrome 15.0 −1.9 19.7 29th 3.5 −0.4 −0.7 26th 24.4 28.0 average 87%
North Wimmera (district 78)
Nhill 13.4 −1.8 18.7 29th 2.7 −1.3 −3.2 27th 45.8 47.3 average 97%
Nhill Aerodrome 13.8   19.2 29th 3.6   −0.9 27th 38.0
Warracknabeal Museum 13.7 −1.9 18.6 29th 3.3 −1.1 0.0 27th 33.7 43.1 average 78%
South Wimmera (district 79)
Edenhope Airport 12.8   17.5 29th 4.1   −0.1 27th 59.2
Grampians 3.6   8.7 29th 0.1   −2.6 22nd 123.4
Horsham Aerodrome 13.0 −2.5 18.3 29th 2.0 −1.0 −2.0 13th 36.4 36.6 average 99%
Horsham Polkemmet Rd 13.4 −1.6 18.6 29th 2.7 −1.6 −2.5 27th 41.8 48.5 average 86%
Kanagulk 12.5   17.1 29th 3.3   −1.1 27th 60.8
Longerenong 13.1 −1.7 18.1 29th 2.2 −1.8 −1.7 27th 32.2 43.5 average 74%
Pyrenees 6.3   12.5 29th 1.9   −1.1 10th 85.2
Stawell Aerodrome 12.4 −1.9 16.9 29th 3.6 −0.9 −0.8 23rd 46.8 51.0 average 92%
Lower North (district 80)
Charlton 13.6   18.4 29th 2.7   −1.6 9th 40.8
Echuca Aerodrome 14.4 −0.9 19.2 29th 2.8 −1.9 −1.5 25th 31.6 42.0 average 75%
Kerang 14.8 −1.2 19.9 29th 3.8 −1.1 −0.5 25th 34.4 37.0 average 93%
Kyabram DPI 13.7 −1.2 18.0 29th 2.9 −0.9 −1.6 25th 38.2 42.5 average 90%
Upper North (district 81)
Bendigo Airport 12.4 −1.9 16.7 29th 1.5 −1.0 −3.0 23rd 59.2 45.8 average 129%
Shepparton Airport 13.6 −1.6 17.7 29th 2.8 −0.7 −2.6 25th 32.8 46.3 low 71%
Tatura Inst Sustainable Ag 13.5 −1.2 17.5 29th 3.2 −0.6 −2.6 25th 32.4 46.9 average 69%
Yarrawonga 14.2 −1.3 17.9 29th 2.7 −1.0 −1.8 19th 22.4 37.3 average 60%
Lower Northeast (district 82)
Benalla Airport 13.8   18.7 27th 3.1   −1.8 26th 47.9
Corryong Airport 13.1   18.1 29th 1.2   −3.3 17th 60.7
Dartmouth Reservoir 12.3 −1.2 17.8 29th 1.9 −0.7 −2.5 24th 76.8 125.3 low 61%
Hunters Hill 7.2 −2.0 13.6 30th 1.3 −1.4 −1.7 17th 123.8 146.7 average 84%
Rutherglen Research 13.3 −0.7 17.7 29th 1.4 −1.4 −3.5 24th 41.0 60.7 low 68%
Strathbogie 10.2 −1.4 14.0 29th 1.7 −0.6 −3.8 25th 71.4 116.0 low 62%
Wangaratta Aero 13.7 −0.8 17.9 29th 2.1 −0.9 −2.0 17th 44.8 57.6 average 78%
Upper Northeast (district 83)
Dinner Plain 6.3   11.4 29th −2.2   −5.8 23rd 41.0
Edi Upper 12.4 −1.0 16.6 30th 2.7 −1.2 −0.8 17th 100.2 120.3 average 83%
Falls Creek −0.5 −2.8 4.5 29th −4.5 −2.0 −9.0 17th 103.6 81.3 average 127%
Mount Buller 0.2 −2.1 4.7 29th −3.7 −1.5 −8.7 23rd 171.2 159.9 average 107%
Mount Hotham −2.0 −2.8 2.8 30th −5.2 −2.0 −8.8 24th 114.4 143.7 average 80%
Omeo 10.8   15.7 30th 0.7   −2.6 23rd 36.8
East Gippsland (district 84)
Combienbar AWS 10.6 −2.2 19.0 31st 4.0 −1.2 1.5 11th 94.0 60.0 high 157%
Gabo Island Lighthouse 14.1 −0.5 18.4 1st 8.4 −0.1 5.8 10th 174.2 72.7 very high 240%
Gelantipy 9.3 −2.0 15.4 31st 2.1 −0.7 −1.2 23rd 62.2 49.1 average 127%
Lakes Entrance 14.5   19.8 31st 6.1   1.0 10th 83.6
Mallacoota 14.3 −1.5 21.1 31st 6.3 −0.2 1.5 12th 193.2 66.5 highest 291%
Mount Nowa Nowa 12.7 −1.8 19.3 30th 5.4 −0.9 1.8 23rd 64.2 53.2 high 121%
Orbost 14.6   20.7 31st 5.7   1.9 29th 63.2
Orbost 15.2 −0.8 21.5 30th 5.2 +0.4 0.1 25th 61.6 58.6 average 105%
Point Hicks 13.7 −1.3 19.2 30th 7.8 −0.6 5.0 3rd 159.3 79.2 very high 201%
West Gippsland (district 85)
Bairnsdale Airport 15.1 −0.5 20.3 30th 4.2 −0.2 −1.0 29th 24.0 36.0 low 67%
East Sale Airport 14.1 −0.9 18.0 30th 4.5 +0.4 0.1 19th 44.6 46.2 average 97%
Morwell 13.7 −1.1 18.0 30th 5.0 +0.7 −1.4 23rd 62.6 62.3 average 100%
Mount Baw Baw 1.0 −2.5 6.4 29th −2.4 −1.3 −6.6 23rd 277.2
Mount Moornapa 12.1 −1.6 18.5 30th 4.9 −0.8 1.4 23rd 39.2 47.9 low 82%
Noojee 11.8 −1.7 17.0 29th 3.7 +0.1 0.6 23rd 108.4 107.5 average 101%
Pound Creek 13.4   18.7 30th 6.2   1.5 25th 99.0
Wilsons Promontory Lighthouse 11.8 −0.9 15.0 30th 8.4 +0.1 4.7 22nd 111.2 119.7 average 93%
Yarram Airport 14.0   17.7 30th 5.2   −0.2 6th 46.6
East Central (district 86)
Bundoora 13.6 −1.3 18.5 29th 5.8 −0.2 0.5 25th 53.0 57.4 average 92%
Cerberus 13.4 −1.4 17.7 30th 6.3 −0.3 0.5 25th 101.8 76.7 high 133%
Coldstream 13.1 −1.8 17.7 30th 3.4 −0.8 −1.9 23rd 61.6 65.9 average 93%
Cranbourne Botanic Gardens 13.4 −1.2 18.9 30th 5.8 −0.5 2.5 23rd 108.5 77.1 high 141%
Essendon Airport 13.7 −0.5 17.7 31st 5.6 +0.2 0.6 25th 44.8 49.4 average 91%
Ferny Creek 8.7 −1.7 14.6 29th 3.9 −1.4 −0.6 11th 120.0 85.7 high 140%
Frankston AWS 12.5 −1.1 18.6 30th 7.6 −0.6 3.9 23rd
Melbourne Airport 13.4 −1.0 17.4 29th 5.2 −0.7 1.2 5th 45.6 46.1 average 99%
Melbourne Regional Office 14.7 −0.3 19.3 29th 7.3 +0.7 3.2 25th 43.8 50.2 average 87%
Moorabbin Airport 13.7 −1.1 19.0 30th 6.6 −0.1 2.4 25th 61.8 66.9 average 92%
Rhyll 13.3 −1.1 17.6 30th 7.7 −0.6 5.1 23rd 108.0 76.1 high 142%
Scoresby Research Institute 13.4 −0.8 18.1 30th 5.2 −1.1 −0.1 22nd 63.6 81.7 average 78%
Viewbank 13.6   17.9 29th 5.7   −0.3 25th 63.0
Wallan 9.3 −1.3 12.9 26th 3.4 −0.8 0.3 11th 68.2 57.6 average 118%
Wonthaggi 13.7 −0.7 19.3 30th 6.3 −0.5 2.0 23rd 139.7 101.9 high 137%
West Central (district 87)
Avalon Airport 14.1 −1.4 17.1 31st 4.9 −0.5 −0.3 25th 37.6 44.1 average 85%
Grovedale 13.8 −1.2 17.2 29th 5.1 −0.6 0.1 8th 38.6 48.1 average 80%
Laverton RAAF 14.1 −0.8 18.6 29th 5.2 −0.2 0.3 5th 40.4 45.2 average 89%
Point Wilson 12.1 −2.0 14.8 20th 6.6 −1.5 4.8 5th
Sheoaks 12.0 −1.4 17.3 29th 4.6 −0.7 0.0 5th 49.2 43.9 average 112%
North Central (district 88)
Castlemaine Prison 11.3 −2.0 15.0 29th 2.4 −1.1 −3.4 23rd 47.7 66.4 low 72%
Eildon Fire Tower 9.1 −1.6 13.8 29th 3.2 −1.2 0.1 10th 57.0 72.2 low 79%
Lake Eildon 12.7 −0.9 17.4 29th 2.8 −1.3 −1.9 23rd 77.6 99.2 average 78%
Mangalore Airport 13.2 −0.9 16.6 29th 2.9 −1.0 −1.6 23rd 44.2 63.8 low 69%
Maryborough 12.8 −1.2 16.6 29th 3.0 −0.9 −1.8 8th 47.2 56.1 average 84%
Redesdale 11.8 −1.9 15.5 29th 2.4 −0.6 −1.5 8th 61.4 60.1 average 102%
Western Plains (district 89)
Ararat Prison 11.5 −1.5 15.8 29th 3.1 −0.7 −1.8 8th 51.4 67.5 low 76%
Ballarat Aerodrome 10.4 −1.1 14.7 29th 2.5 −1.2 −2.6 8th 71.4 74.6 average 96%
Westmere 11.6   16.2 29th 3.6   −1.0 29th 46.8
West Coast (district 90)
Aireys Inlet 13.5 −1.0 18.0 29th 6.4 −1.1 3.4 8th 66.6 64.7 average 103%
Cape Nelson Lighthouse 13.1 −1.4 18.0 29th 8.0 −0.6 3.9 5th 130.2 97.4 high 134%
Cape Otway Lighthouse 12.5 −1.4 16.2 30th 7.5 −0.3 4.4 8th 127.0 102.3 high 124%
Casterton 12.7   16.3 29th 3.9   −0.2 27th 73.8
Casterton Showgrounds 13.4 −1.3 17.0 29th 4.5 −1.0 0.2 27th 72.3 84.7 average 85%
Colac 11.6   15.6 29th 4.3   1.2 8th 57.2
Hamilton Airport 11.6 −1.8 16.1 29th 3.6 −1.2 0.3 29th 60.0 77.0 average 78%
Mortlake Racecourse 12.4 −1.5 17.0 29th 4.1 −0.6 −1.2 5th 77.6 60.5 high 128%
Port Fairy AWS 13.8 −1.4 19.5 29th 6.7 −0.6 2.3 5th 101.0 79.8 high 127%
Portland 12.4 −1.6 17.1 29th 6.4 −0.2 2.3 29th 129.4 101.7 high 127%
Warrnambool Airport NDB 12.8 −1.8 17.4 29th 5.1 −0.5 0.1 5th 115.0
Weeaproinah 8.8 −1.1 13.0 29th 4.1 −0.7 0.6 10th 262.4 231.0 average 114%

Notes

This statement has been prepared based on information available at 1 pm on Monday 1 September 2008. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals 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 ("normal") 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, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal 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