Victorian Monthly Climate Summary: July 2006
Variable rainfall and mild nights

Tuesday 1 August, 2006

In Brief

Averaged across the State, it was the driest July in Victoria since 2002. Temperatures tended to be above normal, particularly overnight minima in the east.

Details

Temperatures

Maximum temperatures were mostly near normal for July although in the northeast warmer conditions were experienced, with temperatures between 1 and 2 degrees above normal. The highest temperature ( 21.2 degrees) occurred at Mildura on the 10th.

Unlike June, when there were many cold, frosty nights, minimum temperatures were near normal or slightly higher during July. Eastern Victoria in particular experienced mild nights, with minimum temperatures between 1 and 3 degrees above normal. The mild nights were due to cloud cover, provided by cold fronts and other weather systems, acting like a blanket and trapping heat near the surface. The warmest night (minimum 12.5 degrees) occurred at Geelong Airport on the 17th.

Click here to view maps of temperature for Victoria, and long term climate trends for Victoria.


Rainfall:

Average to below average rainfall was recorded in most areas during July although parts of Gippsland and northern Victoria received above average rainfall.

The highest rainfall total for the month was 107.1 mm at Point Hicks (Lighthouse) on the Gippsland coast, while Longerenong, in the Wimmera, received the lowest total rainfall of 23.4 mm.

Click here to view maps of rainfall for Victoria, and long term climate trends for Victoria.


Significant Weather Systems

In contrast to June, when high pressures systems dominated over Victoria, there were a number of significant cold fronts and low pressure systems during July which brought much needed rain to the state.

Early in the month, on the 2nd, a cold front and associated low pressure system crossed Victoria bringing rain to most areas. The next significant cold front moved over the state on the 11th with strong to gale force winds ahead of and behind the front. Rainfall with this system was only patchy, however, with totals mostly 5 mm or less.

From the 15th to the 17th a low pressure system that had developed over inland Australia moved over northern Victoria and brought widespread significant rainfall to all districts.

A surface low pressure trough and upper level low on the 24th resulted in rain and thunderstorms, particularly in central Victoria. To finish the month, a cold front crossed Victoria on the 30th and 31st bringing rain to most districts and strong winds to southern and mountain areas.


Melbourne Summary

Melbourne's conditions during July were warm and moist compared to average.

Both maximum and minimum temperatures were close to a degree above normal making it a mild month. The average maximum temperature was 14.5 degrees (normal 13.7 degrees) and the average minimum temperature was 7.5 degrees (normal 6.5 degrees).

Melbourne received just above average rainfall for July (51.2 mm compared with an average of 48.8 mm). The rain was a welcome relief after just 8.8 mm in June but Melbourne still has a significant rainfall deficit for 2006.

In contrast to the low minimum temperatures, Melbourne's maximum temperatures for June were spot on average (14.3 degrees).<

Included in this summary are a table of State extremes and summaries for locations across the State. Visit our maps of rainfall and temperatures for this month.

Please contact us for further information.

Victorian Climate Services Centre
Bureau of Meteorology
Ms Monica Long (03) 9669 4949
Email climate.vic@bom.gov.au

This statement has been prepared based on information available at 10 AM on Tuesday 1 August 2006. Although every effort has been made to check them, it is possible that results may change as new information becomes available.

Extremes

Weather extremes during July 2006

Highest temperature
Hottest day
21.2 °C Mildura Airport on 10th
Highest mean daily maximum temperature
Warmest days on average
15.4 °C Mildura Airport
and Ouyen (Post Office)
Lowest mean daily maximum temperature
Coolest days on average
−0.2 °C Mt Hotham
Lowest daily maximum temperature
Coldest day
−4.2 °C Mt Hotham on 12th
Lowest temperature
Coldest night
−6.7 °C Mt Hotham on 19th
Lowest mean daily minimum temperature
Coldest nights on average
−3.3 °C Mt Hotham
Highest mean daily minimum temperature
Mildest nights on average
9.5 °C Wilsons Promontory Lighthouse
Highest daily minimum
Warmest night
12.5 °C Geelong Airport on 17th
Highest total rainfall
Wettest overall
107.1 mm Point Hicks (Lighthouse)
Lowest total rainfall
Driest overall
23.4 mm Longerenong
Highest daily rainfall
Wettest day
30.8 mm Kilmore Gap on 16th

Summaries

Summary statistics for July 2006


Maximum temperatures
for July
(°C)
Minimum temperatures
for July
(°C)
Rainfall
for July
(mm)
Mean for 2006 Difference from normal Highest for 2006 Mean for 2006 Difference from normal Lowest for 2006 Total for 2006 Normal total
Albury Airport 14.2 +1.4 17.3 3.4 +0.8 −2.8 52 89
Bairnsdale Airport 14.1 −0.2 17.7 5.2 +1.4 −1.7 62 53
Ballarat Aerodrome 11.0 +0.9 13.9 3.0 −0.1 −2.7 48 67
Benalla 14.5 +1.8 18.5 4.1 +1.4 −2.0 63 75
Bendigo Airport 13.1 +1.0 16.3 3.5 0 −1.7 59 63
Cape Otway Lighthouse 12.5 −0.2 15.3 8.7 +1.2 6.1 81 122
Castlemaine Prison 12.2 +0.4 16.0 3.6 +1.3 −3.9 75 61
Cerberus 13.8 +1.0 16.3 6.1 −1.5 −0.2 38 72
Colac 11.5 −1.2 14.3 5.4 +1.5 1.7 31 90
Coldstream 13.5 +0.3 16.5 3.9 +0.7 −4.4 51 78
East Sale Airport 14.3 +0.6 17.5 3.9 +1.0 −2.1 28 43
Echuca Aerodrome 14.5 +0.9 18.3 4.0 +0.5 −0.4 42 42
Geelong Airport 14.1 +0.5 17.0 5.9 +0.8 −0.8 28 52
Hamilton Airport 11.9 −0.3 14.2 3.8 −0.4 −1.2 52 66
Horsham 14.1 +0.7 16.6 2.9 −0.7 −2.5 32 54
Kerang 15.0 +1.0 17.8 4.8 +0.8 0.7 63 39
Kilmore Gap 9.3 +1.5 12.1 4.1 +1.6 0.5 87 83
Lake Eildon 13.2 +1.8 17.1 3.8 +0.3 −2.5 44 104
Longerenong 13.8 +0.4 17.1 3.2 −0.3 −1.7 23 50
Mangalore Airport 13.6 +1.3 16.8 4.5 +1.5 −0.8 50 61
Maryborough 13.0 +0.9 16.0 3.8 +0.5 −0.8 79 59
Melbourne Regional Office 14.5 +0.8 18.4 7.5 +1.0 2.6 51 49
Mildura Airport 15.4 0 21.2 4.3 −0.1 −1.9 28 26
Morwell 14.1 +0.7 17.6 4.6 +0.9 −0.6 30 69
Mt Hotham −0.2 −0.5 6.3 −3.3 +0.8 −6.7 96 244
Nhill 14.1 +0.4 17.8 2.7 −1.0 −3.0 36 49
Noojee 12.1 +0.2 15.7 3.8 +1.0 −2.0 90 105
Orbost 14.6 −0.3 18.2 6.3 +2.0 0.3 75 74
Ouyen 15.4 +0.1 20.1 4.6 +0.4 0.0 29 31
Point Hicks 14.8 +0.8 18.5 8.6 +0.7 3.2 107 101
Portland 12.9 −0.1 15.3 5.7 −0.4 −1.2 89 104
Shepparton Airport 14.3 +1.5 19.0 4.3 +1.4 −2.5 32 55
Stawell Aerodrome 12.9 +0.7 15.1 3.9 0 −0.2 29 68
Swan Hill Aerodrome 15.0 +0.5 19.1 4.4 +0.3 −0.7 34 35
Wangaratta Aero 14.3 +1.6 18.4 2.6 +0.3 −3.7 55 70
Warracknabeal Museum 14.3 +0.3 18.2 3.9 +0.4 −0.2 29 42
Warrnambool Airport Ndb 13.0 0 15.9 5.4 +0.3 −1.9 69 96
Wilsons Promontory Lighthouse 12.5 +0.5 17.3 9.5 +1.1 5.5 77 134
Wonthaggi 14.0 +0.7 16.8 6.5 +0.7 2.2 53 104
Yarrawonga 14.3 +0.8 17.4 4.4 +1.2 −0.8 38 48

Note

This statement has been prepared based on information available at 10 AM on Tuesday 1 August 2006. Although every effort has been made to check them, it is possible that results may change as new information becomes available.
Long term averages are calculated using the WMO standard of 1961 to 1990.
Climate averages for Victoria localities are available here.
Please use the following localities to cover these regions: Coldstream for the Yarra Glen area; Ceberus for the Mornington Peninsula; Morwell for the Latrobe Valley; Mangalore for Seymour; Mt Hotham for the Alpine area.
Daily Weather Observations for selected Victoria localities are available here.

Please contact us for further information.

Victoria Climate Centre
Bureau of Meteorology
Ms Monica Long (03) 9669 4949
Email climate.vic@bom.gov.au