Victoria in July 2010: A mainly dry July

  • Below average rainfall across the State
  • Maximum temperatures above average in the South, Central and East
  • Minimum temperatures below average in the Mallee and Wimmera

Rainfall

Few frontal systems associated with significant rainfall passed across the State during July, which resulted in below average rainfall for Victoria overall. Most regions in the south and west of the State recorded below average rainfall this month. Notably, Gippsland recorded very much below average rainfall, with some locations experiencing their driest July on record. In fact, Glenmaggie Weir and Valencia Creek recorded under 3mm of rain for the month, their lowest total July rainfall on record. Rainfall was also well below average for East Sale and Bairnsdale Airport which recorded only 11.0mm and 10.8mm respectively, approximately 25% of that usually received.

The north of the State generally recorded average rainfall for the month. Widespread rainfall, of approximately 25-50mm was recorded on the 11th and 14th and localised rainfall in the Alpine region was recorded on the 15th. The wettest location for the month was Falls Creek (Rocky Valley) with 186.6mm and the wettest single day of the month was the 14th, with Falls Creek (Rocky Valley), Harrietville and Mount Hotham all recording more than 55mm of rain. Other than these significant rainfall events, Victoria observed predominantly dry conditions throughout July.

Temperature

Maximum temperature

Highest maximum temperatures for the month were recorded on the 30th, for most regions of Victoria. Lakes Entrance recorded the warmest maximum temperature with 20.5C, closely followed by Bairnsdale Airport (20.0C), whilst Mildura Airport and Orbost both registered a maximum of 19.8C. Additionally, some locations in the north of the State recorded their maximum temperatures for the month on the 12th. The warm temperatures observed during the month were associated with high pressure systems and north-westerly flow bringing warm dry continental air to Victoria.

Gippsland observed the warmest days on average, with Orbost, Lakes Entrance and Mallacoota all experiencing average maximum temperatures of approximately 15C for the month. As expected, the Alpine region observed the coolest days on average and Mount Hotham the coolest, with a mean maximum temperature of just 0.8C.

Minimum temperature

Cold south-westerly flow brought the coldest nights for the month, which were mostly recorded on the 6th, 9th, 20th and 27th. Overall, minimum temperatures were below average in the Mallee and Wimmera districts and above average in parts of the western region.

The coldest nights were observed in the Alpine region, where an icy -8.2C was recorded at Dinner Plain on the 20th. On average, the coldest location for the month was Mount Hotham, recording average temperatures of just 0.8C during the daytime and a frosty -3.5C overnight. In contrast, the warmest nights on average were observed at the lighthouse stations along the Victorian coast, the warmest of which was 9.6C at the Wilsons Promontory Lighthouse.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in July 2010
Hottest day 20.5 C at Lakes Entrance (Eastern Beach Road) on the 30th
Warmest days on average 15.1 C at Orbost (Comparison)
Coolest days on average 0.8 C at Mount Hotham
Coldest day -3.1 C at Mount Hotham on the 15th
Coldest night -8.2 C at Dinner Plain (Mount Hotham Airport) on the 20th
Coolest nights on average -3.5 C at Mount Hotham
Warmest nights on average 9.6 C at Wilsons Promontory Lighthouse
Warmest night 13.3 C at Gabo Island Lighthouse on the 11th
Wettest overall 186.6 mm at Falls Creek (Rocky Valley)
Wettest day 80.2 mm at Falls Creek (Rocky Valley) on the 14th
Highest wind gust 124 km/h at Mount Hotham on the 13th

Maps

Anomaly in mean maximum temperature

Map of Anomaly in mean maximum temperature

Anomaly in mean minimum temperature

Map of Anomaly in mean minimum temperature

Rainfall deciles

Map of Rainfall deciles


Record lowest total July rainfall
Total rainfall
for July 2010 (mm)
Previous lowest
for July
Years of
record
Average for
July
Glenmaggie Weir 2.4 7.4 in 1979 73 36.4
Apsley (Post Office) 20.2 24.7 in 1971 55 74.9
Valencia Creek (Little Plain) 2.8 6.6 in 1994 37 43.6
Glen Waverley (Golf Course) 22.6 24.0 in 1976 36 69.8

Lowest total July rainfall for at least 20 years
Total rainfall
for July 2010 (mm)
Most recent July
this low or lower
Years since
lower
Average for
July
Bruthen (Post Office) 9.5 6.4 in 1972 37 55.0
Leongatha Sth Gippsland Water 30.2 29.0 in 1973 36 86.8
Cabbage Tree Creek 15.2 13.9 in 1972 35 91.6
Cann River 19.1 15.7 in 1976 34 83.3
Club Terrace 15.3 14.4 in 1975 31 80.3
East Sale Airport 11.0 7.4 in 1979 31 41.0
Bairnsdale Airport 10.8 10.5 in 1944 28 49.7
Cobden (Post Office) 45.0 44.6 in 1982 28 92.4
Culgoa 4.0 3.0 in 1982 28 34.9
Bonang 25.0 15.8 in 1979 27 85.2
Harrow (Post Office) 27.1 26.2 in 1982 26 70.9



Summary statistics for July 2010
Maximum temperatures
for July
(C)
Minimum temperatures
for July
(C)
Rainfall
for July
(millimetres)
Mean for
July
2010
Diff
from
average
Highest for
July
2010
Mean for
July
2010
Diff
from
average
Lowest for
July
2010
Total for
July
2010
Average
for
July
Rank of
July
2010
Fraction of
July
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 13.4 +0.4 16.3 13th 2.3 -0.7 -1.2 27th 64.4 65.2 average 99%
North Mallee (district 76)
Mildura Airport 15.0 -0.3 19.8 30th 3.8 -0.5 -1.0 5th 26.4 26.1 average 101%
Ouyen (Post Office) 14.7 -0.4 19.0 30th 3.9 -0.4 0.0 9th 15.6 31.0 low 50%
Walpeup Research 14.6 0.0 19.6 30th 4.0 -0.8 -0.9 6th 17.2 33.1 low 52%
South Mallee (district 77)
Hopetoun Airport 14.5   19.3 30th 1.9   -3.3 25th 22.4
Swan Hill Aerodrome 13.9 -0.7 17.7 30th 3.0 -0.6 -1.7 9th 33.0 29.2 average 113%
North Wimmera (district 78)
Nhill Aerodrome 13.6   16.7 12th 3.5   0.5 3rd 30.2
Warracknabeal Museum 13.6 -0.4 17.2 30th 3.2 -0.5 -0.5 3rd 33.0 40.2 average 82%
South Wimmera (district 79)
Edenhope Airport 13.3   16.6 30th 3.9   -0.9 6th 42.2
Grampians (Mount William) 4.8   11.1 23rd 0.9   -1.4 6th 123.8
Horsham Aerodrome 12.9 -0.8 15.9 30th 3.0 -0.1 -0.8 27th 49.8 40.5 high 123%
Horsham Polkemmet Rd 13.1 -0.3 16.4 12th 3.1 -0.6 -1.9 27th 64.4 47.0 high 137%
Kanagulk 12.5   15.1 12th 3.3   -0.3 6th 48.8
Longerenong 12.9 -0.2 16.2 12th 3.1 -0.3 -1.1 26th 53.2 42.7 high 125%
Pyrenees (Ben Nevis) 6.8   10.6 23rd 2.6   0.7 6th 68.2
Stawell Aerodrome 12.3 -0.2 15.2 12th 4.0 0.0 -0.7 19th 56.8 56.3 average 101%
Lower North (district 80)
Charlton 13.6   17.2 30th 3.4   -1.4 7th 33.4
Echuca Aerodrome 13.4 0.0 16.1 12th 2.3 -1.6 -1.6 27th 38.0 40.9 average 93%
Kerang 14.0 -0.1 17.6 30th 3.4 -0.6 -0.7 4th 48.1 35.5 high 135%
Kyabram DPI 13.3 +0.3 15.9 12th 2.5 -0.5 -2.5 27th 32.4 43.4 average 75%
Upper North (district 81)
Bendigo Airport 12.5 0.0 15.3 30th 2.7 +0.3 -2.2 7th 78.0 53.1 high 147%
Shepparton Airport 12.9 -0.3 15.2 23rd 2.5 -0.7 -2.2 27th 33.4 41.3 average 81%
Tatura Inst Sustainable Ag 13.0 0.0 15.5 12th 2.2 -0.7 -2.9 20th 33.0 48.3 low 68%
Lower Northeast (district 82)
Benalla Airport 13.6   15.6 12th 1.9   -2.7 20th 47.1
Corryong Airport 10.6   16.5 13th -0.1   -3.5 27th 83.6
Dartmouth Reservoir 12.6 +0.9 15.0 23rd 1.1 -1.1 -1.5 22nd 87.2 112.6 average 77%
Hunters Hill 8.5 +1.4 11.3 23rd 2.3 +0.4 -0.1 21st 137.2 151.6 average 91%
Rutherglen Research 13.1 +0.7 15.4 9th 1.3 -0.7 -3.5 27th 64.4 61.9 average 104%
Strathbogie 10.4 +0.3 12.7 12th 0.8 -0.8 -4.4 20th 84.4 123.2 low 69%
Wangaratta Aero 13.2 +0.3 15.8 9th 1.9 -0.5 -2.4 27th 53.0 66.4 average 80%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 7.1 +0.9 11.2 24th -3.0 -1.3 -8.2 20th 38.6 64.7 v low 60%
Edi Upper 12.7 +0.8 15.4 9th 3.2 -0.4 -0.6 20th 124.4 124.5 average 100%
Falls Creek 2.1 +1.0 6.5 23rd -3.0 0.0 -6.4 21st 92.4 77.6 high 119%
Mount Buller 1.9 +0.4 5.1 13th -2.6 0.0 -6.4 20th 133.6 162.5 average 82%
Mount Hotham 0.8 +0.9 5.8 27th -3.5 +0.2 -6.4 20th 160.2 130.4 average 123%
Omeo 10.7   13.8 31st -1.0   -4.9 27th 19.8
East Gippsland (district 84)
Combienbar AWS 11.2 +0.2 16.6 30th 4.9 +0.2 2.2 3rd 9.4 75.8 v low 12%
Gabo Island Lighthouse 14.5 +0.4 18.6 31st 8.5 +0.3 5.7 2nd 48.6 86.3 low 56%
Gelantipy 9.2 -0.3 14.0 29th 1.8 -0.3 -2.3 20th 19.4 47.6 low 41%
Lakes Entrance (Eastern Beach Road) 14.8   20.5 30th 5.8   1.0 18th 10.0
Mallacoota 14.8 0.0 19.5 11th 6.0 -0.2 1.4 18th 29.4 80.1 low 37%
Mount Nowa Nowa 13.0 +0.1 18.3 29th 5.5 -0.4 2.5 20th 11.2 58.1 v low 19%
Orbost 14.7   19.3 30th 4.7   0.9 18th 18.4 58.9 v low 31%
Orbost (Comparison) 15.1 +0.3 19.8 30th 3.1 -1.1 -1.0 18th 20.4 67.0 low 30%
Point Hicks (Lighthouse) 14.0 -0.1 17.8 30th 8.0 -0.2 5.8 6th 74.8 97.8 average 76%
West Gippsland (district 85)
Bairnsdale Airport 14.5 0.0 20.0 30th 3.6 -0.3 -1.2 9th 10.8 49.7 v low 22%
East Sale Airport 14.2 +0.4 19.0 30th 2.1 -1.1 -1.8 20th 11.0 41.0 v low 27%
Morwell (Latrobe Valley Airport) 13.6 0.0 18.1 30th 2.6 -1.1 -3.1 20th 30.6 65.1 v low 47%
Mount Baw Baw 1.9 -0.4 6.6 12th -1.8 -0.3 -5.0 20th 94.2 128.9 average 73%
Mount Moornapa 12.1 +0.1 18.0 30th 5.2 0.0 1.8 20th 12.4 53.0 v low 23%
Noojee (Slivar) 12.5 +0.5 16.1 12th 2.8 -0.2 -0.6 9th 65.6 103.7 low 63%
Pound Creek 13.9   17.0 30th 5.8   -0.1 6th 61.0
Wilsons Promontory Lighthouse 12.7 +0.5 15.6 30th 9.6 +1.3 7.3 15th 68.2 122.0 low 56%
Yarram Airport 14.3   18.3 30th 3.0   -2.1 20th 13.6
East Central (district 86)
Bundoora (Latrobe University) 13.4 +0.1 16.5 31st 5.4 0.0 0.1 9th 34.3 48.9 average 70%
Cerberus 13.8 +0.2 17.0 30th 6.3 +0.1 0.9 6th 48.4 74.1 low 65%
Coldstream 13.4 +0.2 16.6 13th 3.5 -0.1 -3.2 9th 46.8 59.3 low 79%
Coldstream Comparison 13.3   16.6 13th 3.4   -3.3 9th 46.8
Cranbourne Botanic Gardens 13.4 +0.1 16.9 30th 5.9 -0.2 1.9 9th 45.3 68.6 low 66%
Essendon Airport 13.5 +0.6 17.1 30th 5.5 +0.3 0.2 9th 28.6 43.7 low 65%
Ferny Creek (Dunns Hill) 8.9 -0.2 12.2 12th 5.0 +0.1 2.2 20th 64.4 84.1 average 77%
Frankston AWS 12.6 -0.1 16.4 13th 7.9 0.0 4.1 6th
Melbourne Airport 13.3 +0.3 17.4 30th 5.3 0.0 1.4 6th 27.6 35.8 average 77%
Melbourne Regional Office 14.6 +1.2 17.9 31st 7.3 +1.3 3.2 20th 29.6 47.6 low 62%
Moorabbin Airport 13.7 +0.1 17.2 30th 6.1 +0.1 0.7 9th 25.2 62.0 v low 41%
Rhyll 13.6 +0.4 15.7 13th 8.2 +0.1 5.6 6th 55.2 65.2 average 85%
Scoresby Research Institute 13.3 +0.4 16.6 12th 5.3 -0.5 0.5 27th 42.8 73.9 low 58%
Viewbank (ARPANSA) 13.6 -0.3 17.0 31st 5.1 -0.7 0.0 20th 41.2 48.3 average 85%
Wallan (Kilmore Gap) 9.0 0.0 11.8 31st 4.7 +0.8 1.8 20th 70.0 58.8 average 119%
Wonthaggi 14.1 +0.6 17.2 30th 6.5 +0.4 1.9 6th 77.6 99.1 average 78%
West Central (district 87)
Avalon Airport 14.1 +0.1 18.6 30th 4.8 -0.2 -0.8 9th 17.2 37.7 low 46%
Grovedale (Geelong Airport) 13.6 -0.3 17.6 30th 5.5 +0.1 1.4 9th 23.6 49.2 low 48%
Laverton RAAF 14.0 +0.4 18.0 30th 5.2 +0.3 0.7 27th 18.4 39.0 low 47%
Sheoaks 12.1 0.0 15.8 30th 4.5 -0.5 0.1 6th 24.0 39.3 low 61%
North Central (district 88)
Castlemaine Prison 11.7 0.0 14.9 30th 2.8 0.0 -2.9 6th 54.4 61.1 average 89%
Eildon Fire Tower 9.4 +0.3 12.4 12th 3.5 -0.3 -0.3 20th 64.0 66.0 average 97%
Lake Eildon 12.1 +0.2 15.4 12th 3.6 +0.1 -0.6 27th 70.0 93.6 low 75%
Mangalore Airport 12.6 +0.2 14.9 31st 2.4 -0.7 -2.0 5th 68.8 58.7 average 117%
Maryborough 12.4 +0.2 15.1 30th 3.7 +0.3 -0.9 20th 55.7 53.7 average 104%
Redesdale 12.2 +0.4 15.0 30th 2.4 -0.6 -2.7 20th 80.8 65.6 average 123%
Western Plains (district 89)
Ararat Prison 11.7 0.0 14.4 13th 3.0 -0.3 -3.0 27th 57.2 62.5 average 92%
Ballarat Aerodrome 10.4 +0.4 13.3 30th 3.1 -0.1 -2.8 9th 55.0 66.4 average 83%
Westmere 12.2   15.1 30th 3.7   -2.3 9th 31.8
West Coast (district 90)
Aireys Inlet 13.2 -0.2 16.8 30th 7.4 +0.1 5.1 9th 46.2 64.3 low 72%
Cape Nelson Lighthouse 14.2 +0.5 17.6 30th 8.4 0.0 5.2 29th 85.8 93.7 average 92%
Cape Otway Lighthouse 13.1 +0.1 17.3 13th 8.4 +0.9 6.7 20th 77.2 105.4 low 73%
Casterton 13.3   16.6 30th 3.8   -1.5 6th 56.4
Casterton Showgrounds 13.8 +0.4 17.0 30th 3.7 -1.2 -2.4 9th 59.7 85.4 low 70%
Colac (Mount Gellibrand) 11.1 -0.5 14.5 30th 5.1 -0.1 2.1 19th 47.8 55.0 average 87%
Dartmoor 13.9   16.9 30th 4.6   -0.9 6th 83.6
Hamilton Airport 12.1 0.0 14.9 30th 3.3 -1.0 -1.2 27th 50.4 66.8 low 75%
Mortlake Racecourse 13.1 +0.2 16.8 30th 3.7 -0.8 -1.4 27th 40.6 60.8 low 67%
Port Fairy AWS 14.3 +0.1 17.4 30th 5.8 -1.2 1.6 9th 62.0 88.8 low 70%
Portland (Cashmore Airport) 13.4 +0.3 16.7 30th 5.9 -0.3 1.4 9th 107.4 107.2 average 100%
Warrnambool Airport NDB 13.5 0.0 16.3 30th 4.5 -0.9 -0.4 6th 66.6 78.6 average 85%
Weeaproinah 9.6 +0.7 11.9 21st 5.0 +0.4 2.7 19th 143.8 225.6 low 64%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Victoria 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 2 pm on Tuesday 3 August 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