Wednesday, 1 August 2007 - Monthly Climate Summary for Victoria - Product code IDCKGC16R0

Victoria in July 2007
A return to normal conditions

Summary

For the first time for a number of years, Victoria experienced a July with average or above average rainfall and near average temperatures.

This may be related to the fact that current conditions are favourable for the development of a La Niņa, with strong trade winds, cooling sea surface temperatures extending into the central Pacific.

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Details

There were a number of events with snow down to low levels, and several nights with severe frost and widespread fog.

Rainfall

Rainfall was above average over much of southern Victoria, with particularly heavy falls to the southwest of Melbourne. Rainfall was average in other Districts. The wettest overall was 285.2 mm at Weeaproinah. The driest overall was 23.0 mm at Mildura Airport. The wettest single day 62.6 mm at Cape Otway Lighthouse on the 1st. Some sites had their highest total July rainfall on record.

Maximum temperature

Maximum temperatures were close to average across the State, slightly below in the north and east, slightly above in the south and west. The hottest day was 23.8°C at Mildura Airport on the 25th. The warmest days on average were 15.7°C at Mildura Airport. The coolest days on average were −1.4°C at Mt Hotham. The coldest day was −5.2°C at Mt Hotham on the 18th.

Minimum temperature

Minimum temperatures were also close to average across the State, slightly below in the north, slightly above in the south. The coldest night was −8.2°C at Mt Hotham on the 15th. The coolest nights on average were −4.9°C at Mt Hotham. The warmest nights on average were 9.1°C at Wilsons Promontory Lighthouse. The warmest night was 13.2°C at Wilsons Promontory Lighthouse on the 26th. Some sites had their warmest July night (highest daily minimum temperature) on record.

Wind

The strongest wind gust was 117 km/h at Wilsons Promontory Lighthouse on the 3rd.

Melbourne

In Melbourne, the average minimum temperature was 6.9 deg C (normal 6.6 deg C), the average maximum temperature was 13.8 deg C (normal 13.7 deg C), whilst the total monthly rainfall was 62.8 mm (normal 48.8 mm).

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

Hottest day
Highest temperature		 23.8°C at Mildura Airport on the 25th
Warmest days on average
Highest mean daily maximum temperature		 15.7°C at Mildura Airport
Coolest days on average
Lowest mean daily maximum temperature		 −1.4°C at Mt Hotham
Coldest day
Lowest daily maximum temperature		 −5.2°C at Mt Hotham on the 18th
Coldest night
Lowest temperature		 −8.2°C at Mt Hotham on the 15th
Coolest nights on average
Lowest mean daily minimum temperature		 −4.9°C at Mt Hotham
Warmest nights on average
Highest mean daily minimum temperature		 9.1°C at Wilsons Promontory Lighthouse
Warmest night
Highest daily minimum temperature		 13.2°C at Wilsons Promontory Lighthouse on the 26th
Wettest overall
Highest total rainfall		 285.2 mm at Weeaproinah
Driest overall
Lowest total rainfall		 23.0 mm at Mildura Airport
Wettest day
Highest daily rainfall		 62.6 mm at Cape Otway Lighthouse on the 1st
Highest wind gust
 117 km/h at Wilsons Promontory Lighthouse on the 3rd

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Records

Record highest total July rainfall
Total rainfall
for July 2007 (mm) 		Previous highest
for July		 Years of
record		 Normal for
July
Avalon Airport 90.8 75.0 in 1978 25

 


Record highest July daily minimum temperature
Highest daily minimum
temperature
in July 2007 (°C) 		Previous highest
for July		 Years of
record		 Normal for
July
Bundoora (Latrobe University) 12.1 on the 26th 12.0 on the 10th in 2001 25


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Summaries

 In the following table, certain key sites have been highlighted to make them easier to identify.

Summary statistics for July 2007
Maximum temperatures
for July
(°C)		 Minimum temperatures
for July
(°C)		 Rainfall
for July
(millimetres)
Mean for
July
2007		 Diff
from
normal		 Highest for
July
2007		 Mean for
July
2007		 Diff
from
normal		 Lowest for
July
2007		 Total for
July
2007		 Normal
for
July		 Rank of
July
2007		 Fraction of
July
normal
North Mallee (district 76)
Mildura Airport 15.7 +0.4 23.8 25th 3.5 −0.8 −2.0 21st 23.0 26.2 normal 88%
Ouyen 14.9 −0.4 22.8 25th 4.3 +0.1 −1.4 22nd 28.3 31.1 normal 91%
Walpeup Research 14.4 −0.3 22.1 25th 4.7 +0.1 −0.3 18th 34.0 33.3 normal 102%
South Mallee (district 77)
Hopetoun Airport 14.3 21.3 25th 1.8 −3.5 21st 23.6
Swan Hill Aerodrome 13.3 21.3 25th 2.7 −5.2 22nd 30.2
North Wimmera (district 78)
Nhill 13.8 +0.1 21.4 25th 3.8 +0.1 −1.8 19th 44.8 49.1 normal 91%
Nhill Aerodrome 13.8 21.7 25th 4.0 −1.6 21st 34.6
Warracknabeal Museum 13.5 20.6 25th 3.6 −2.5 22nd 32.2 41.7 normal 77%
South Wimmera (district 79)
Edenhope Airport 13.1 20.2 25th 4.6 −0.2 18th 69.6
Grampians 4.6 10.5 26th 0.7 −3.0 18th 155.6
Horsham Aerodrome 13.2 20.0 25th 2.4 −3.0 22nd 41.0
Horsham Polkemmet Rd 13.4 0 20.8 25th 3.3 −0.4 −2.6 21st 48.8 53.5 normal 91%
Kanagulk 12.7 19.3 25th 4.0 −0.7 21st 56.4
Longerenong 13.0 −0.3 19.9 25th 3.0 −0.6 −1.7 22nd 38.0 49.8 normal 76%
Stawell Aerodrome 12.2 18.7 25th 3.4 −1.3 15th 80.2
Lower North (district 80)
Charlton 13.4 20.2 25th 3.4 −3.7 22nd 35.8
Echuca Aerodrome 13.3 −0.3 19.3 25th 3.0 −0.5 −2.3 15th 45.2 41.7 normal 108%
Kerang 13.9 −0.1 20.3 25th 3.6 −0.5 −2.2 22nd 40.4 39.0 normal 104%
Kyabram DPI 12.7 0 17.3 25th 2.9 +0.3 −2.6 22nd 57.6 44.1 high 131%
Upper North (district 81)
Bendigo Airport 11.9 16.1 25th 2.1 −2.6 22nd 66.4
Shepparton Airport 12.6 17.0 25th 2.9 −2.6 15th 55.4
Tatura Inst Sustainable Ag 12.7 −0.1 17.0 25th 2.7 −0.1 −2.8 22nd 54.0 46.6 normal 116%
Yarrawonga 12.7 17.0 25th 3.0 −2.2 15th 59.0
Lower Northeast (district 82)
Benalla Airport 12.5 17.0 25th 2.0 −3.7 15th 84.1
Corryong Airport 11.2 15.0 27th 0.7 −3.7 23rd 97.8
Dartmouth Reservoir 11.4 16.8 25th 1.6 −3.8 15th 134.6
Hunters Hill 6.6 12.3 25th 1.4 −2.5 18th 192.2
Rutherglen Research 12.1 −0.1 16.2 25th 1.2 −0.5 −4.5 15th 79.2 68.9 normal 115%
Strathbogie 9.6 14.9 25th 2.0 −4.4 22nd 121.8 133.7 normal 91%
Wangaratta Aero 12.3 17.0 25th 1.9 −4.1 15th 67.2
Upper Northeast (district 83)
Dinner Plain 5.1 9.1 30th −2.1 −6.8 22nd 58.6
Edi Upper 11.3 16.4 25th 3.3 −1.2 15th 114.0
Falls Creek 0.0 7.1 30th −4.0 −7.3 18th 91.8
Mount Buller 1.9 20th −3.1 −6.5 15th 139.4
Mt Hotham −1.4 2.2 25th −4.9 −8.2 15th 196.0
Omeo 9.5 14.9 25th 1.0 −3.4 22nd 45.0
Omeo Comparison 9.5 −0.6 15.1 25th 0.6 +1.1 −3.7 22nd 44.4 52.7 normal 84%
East Gippsland (district 84)
Combienbar AWS 10.4 18.6 26th 4.2 1.4 15th 136.4
Gabo Island Lighthouse 16.0 29th 8.3 −0.2 5.7 17th 146.8 91.8 high 160%
Gelantipy 8.7 15.6 26th 2.2 −1.7 16th 44.8
Lakes Entrance 14.6 21.2 25th 5.5 −0.5 23rd 66.0
Mallacoota 14.1 21.2 26th 6.2 3.0 17th 94.4
Mt Nowa Nowa 12.1 18.2 25th 5.4 2.2 18th 66.2
Orbost 14.2 20.5 25th 5.6 1.5 22nd 96.6
Orbost 14.8 −0.2 21.4 25th 5.0 +0.7 0.8 22nd 90.7 73.5 normal 123%
Point Hicks 13.6 −0.3 20.5 26th 7.8 −0.1 4.5 14th 168.0 100.7 high 167%
West Gippsland (district 85)
Bairnsdale Airport 13.8 19.9 25th 4.8 0.4 23rd 51.6
East Sale Airport 13.7 0 19.4 25th 3.4 +0.5 −2.1 23rd 59.8 43.4 high 138%
Morwell 13.6 19.8 25th 2.8 −2.2 16th 79.0
Mt Baw Baw 1.1 5.5 25th −2.3 −5.7 16th 278.4
Mt Moornapa 11.2 18.6 25th 4.8 1.2 18th 58.8
Noojee 11.8 17.6 25th 3.1 −1.6 23rd 135.6
Pound Creek 13.5 18.7 25th 5.0 −0.4 21st 123.2
Wilsons Promontory Lighthouse 12.7 +0.6 19.3 25th 9.1 +0.7 5.2 18th 110.4 134.1 normal 82%
East Central (district 86)
Bundoora 12.8 17.9 25th 5.5 −1.2 22nd 56.3
Cerberus 13.4 18.8 25th 5.9 −0.4 22nd 137.0
Coldstream 12.6 17.9 25th 3.5 −2.9 22nd 74.4
Cranbourne Botanic Gardens 13.0 18.8 25th 5.6 1.2 22nd 122.8
Essendon Airport 12.8 17.1 25th 5.6 0.1 22nd 52.6 43.8 normal 120%
Ferny Creek 8.4 14.4 25th 4.4 0.0 18th 127.6
Frankston AWS 12.1 16.9 25th 7.3 2.7 21st
Melbourne Airport 12.5 −0.3 16.3 25th 5.5 +0.4 0.9 21st 40.0 38.7 normal 103%
Melbourne Regional Office 13.8 +0.1 18.2 25th 6.9 +0.3 2.2 21st 62.8 48.8 high 129%
Moorabbin Airport 13.5 0 19.5 25th 6.1 +0.1 −0.3 22nd 78.0 63.6 high 123%
Rhyll 13.1 16.6 25th 7.7 3.5 22nd 99.4
Scoresby Research Institute 12.9 +0.2 18.6 25th 5.8 +0.1 0.4 21st 88.6 75.4 normal 118%
Viewbank 13.1 18.7 25th 5.3 −0.9 22nd 70.0
Wallan 8.2 12.0 25th 3.4 −0.1 18th 71.8
Wonthaggi 13.7 +0.4 18.2 26th 5.9 +0.1 1.4 22nd 123.2 104.3 high 118%
West Central (district 87)
Avalon Airport 13.6 19.1 25th 4.4 −1.4 22nd 90.8
Geelong Airport 13.6 20.1 25th 4.8 −0.8 22nd 96.4
Laverton RAAF 13.5 −0.2 17.8 25th 5.1 +0.3 −1.6 22nd 54.0 43.2 normal 125%
Point Wilson 12.6 17.2 24th 7.1 3.6 22nd
Sheoaks 11.9 17.9 25th 4.6 −2.4 22nd 76.4
North Central (district 88)
Castlemaine Prison 11.2 −0.5 15.9 25th 2.7 +0.4 −3.3 21st 74.4 61.3 normal 121%
Eildon Fire Tower 8.6 15.0 25th 3.4 −0.3 18th 90.2
Lake Eildon 12.1 +0.6 18.1 25th 2.7 −0.8 −1.8 21st 102.4 103.9 normal 99%
Mangalore Airport 12.0 −0.3 16.3 25th 2.8 −0.2 −2.8 22nd 59.4 61.1 normal 97%
Maryborough 12.2 +0.1 16.7 26th 2.6 −0.6 −1.9 22nd 59.0 58.5 normal 101%
Redesdale 11.3 15.0 25th 2.2 −2.0 22nd 77.4 71.9 normal 108%
Western Plains (district 89)
Ararat Prison 11.6 +0.1 17.2 25th 3.7 +0.5 −1.8 15th 88.6 68.9 high 129%
Ballarat Aerodrome 10.2 +0.2 14.6 26th 3.1 0 −2.2 21st 89.2 66.6 high 134%
Westmere 11.8 16.6 25th 4.4 −0.3 22nd 86.2
West Coast (district 90)
Aireys Inlet 13.2 19.1 25th 6.7 3.2 22nd 102.6
Cape Nelson Lighthouse 13.8 20.0 25th 8.0 3.6 22nd 114.2
Cape Otway Lighthouse 12.8 +0.2 18.9 25th 7.9 +0.4 3.1 22nd 140.8 121.6 high 116%
Casterton 13.0 19.2 25th 4.7 −0.1 9th 79.0
Casterton Showgrounds 13.6 +0.3 19.9 25th 5.3 +0.4 −0.5 21st 86.4 92.1 normal 94%
Colac 11.2 16.2 26th 4.7 1.4 18th 100.6
Hamilton Airport 12.3 17.8 25th 4.3 0.2 21st 75.6
Mortlake Racecourse 12.6 17.1 25th 4.3 −0.7 15th 88.2
Port Fairy AWS 14.3 19.5 25th 6.9 0.9 22nd 110.4
Portland 13.2 18.5 25th 6.1 1.8 10th 120.0
Warrnambool Airport Ndb 13.1 17.6 25th 5.3 0.2 22nd 111.0
Weeaproinah 9.0 14.0 25th 4.4 0.7 18th 285.2 233.2 high 122%

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Notes

This statement has been prepared based on information available at 10 am on Wednesday 1 August 2007. 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 the years 1961 to 1990. They are not shown for sites with less than 20 years of record in that time, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of "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