Victoria in September 2012: Dry with warm days

September 2012 in Victoria was characterised by:

  • Average to very much below average rainfall
  • Above average maximum temperatures in most places
  • Mostly close to average minimum temperatures.

Rainfall

Preliminary data indicates that much of Victoria was drier than average this September. The wettest station overall with 215.6 mm was Mount Baw Baw. The wettest single day was the 29th when Wilsons Promontory Lighthouse recorded 46.2 mm. Several relatively young stations observed their highest total September rainfall on record and one recorded its highest September daily rainfall. There is a map of rainfall deciles below.

Temperature

The warmest station on average was Mildura Airport with 15.2 C whilst the coolest on average was Mount Hotham with 0.6 C.

Maximum temperature

Average maximum temperatures were warmer than is usual for September in most parts of the State. The exceptions were the Wimmera and Central districts where the maximum temperatures were close to average. The hottest day was the 27th when Mildura Airport recorded 36.4 C and Mildura Airport also recorded the warmest days on average with 22.6 C. Mount Hotham recorded the coolest days on average with 3.1 C and the coldest day of the month was the 29th when Mount Hotham recorded -4.2 C. A couple of stations had their coldest September day (lowest maximum temperature) on record. There is a map of maximum temperature anomalies below.

Minimum temperature

Night-time temperatures were mixed across the State but overall average minimum temperatures were mostly close to normal for September. The coldest night for the month was the 2nd when Mount Hotham recorded -7.2 C. Mount Hotham also recorded the coolest nights on average with -2.0 C. Gabo Island Lighthouse recorded the warmest nights on average with 10.0 C and the warmest night was the 28th when Mount Nowa Nowa recorded 20.9 C. Echuca Aerodrome had their lowest September temperature on record. Some sites had their warmest September night (highest daily minimum temperature) on record. Cape Nelson Lighthouse had their lowest September mean daily minimum temperature on record. There is a map of minimum temperature anomalies below.

Wind

The strongest wind gust was 154 km/h, recorded at Mount Buller on the 28th.

Further information

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Extremes in September 2012
Hottest day 36.4 C at Mildura Airport on the 27th
Warmest days on average 22.6 C at Mildura Airport
Coolest days on average 3.1 C at Mount Hotham
Coldest day -4.2 C at Mount Hotham on the 29th
Coldest night -7.2 C at Mount Hotham on the 2nd
Coolest nights on average -2.0 C at Mount Hotham
Warmest nights on average 10.0 C at Gabo Island Lighthouse
Warmest night 20.9 C at Mount Nowa Nowa on the 28th
Warmest on average overall 15.2 C at Mildura Airport
Coolest on average overall 0.6 C at Mount Hotham
Wettest overall 215.6 mm at Mount Baw Baw
Wettest day 46.2 mm at Wilsons Promontory Lighthouse on the 29th
Highest wind gust 154 km/h at Mount Buller on the 28th

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 highest September daily rainfall
Highest daily rainfall
in September 2012 (mm)
Previous wettest
for September
Years of
record
Lara (Flinders Ave) 28.2 on the 19th 15.2 on the 29th in 2011 11


Record highest total September rainfall
Total rainfall
for September 2012 (mm)
Previous wettest
for September
Years of
record
Average for
September
Traralgon Ck at Traralgon South 156.0 124.0 in 2011 12 75.8
Bacchus Marsh (Lerderderg River @ U/S Go 51.2 49.8 in 2009 11 28.8
Parwan Ck @ Parwan 44.4 42.6 in 2009 10 25.4


Record lowest September daily maximum temperature
Lowest daily maximum
temperature
in September 2012 (C)
Previous coolest
for September
Years of
record
Average for
September
Mount Baw Baw -2.6 on the 29th = -2.6 on the 5th in 2000 15 5.5
Orbost 10.2 on the 12th 11.5 on the 2nd in 2005 12 18.2


Record highest September daily minimum temperature
Highest daily minimum
temperature
in September 2012 (C)
Previous warmest
for September
Years of
record
Average for
September
Strathbogie 16.6 on the 28th 15.2 on the 24th in 2001 35 3.7
Combienbar AWS 17.7 on the 28th 16.2 on the 24th in 2001 19 6.3
Yarrawonga 18.2 on the 28th 15.9 on the 14th in 2008 19 5.1
Eildon Fire Tower 15.7 on the 28th 14.7 on the 24th in 2001 17 5.7
Mount Nowa Nowa 20.9 on the 28th 19.7 on the 13th in 2009 17 7.8


Record lowest September temperature
Lowest temperature
in September 2012 (C)
Previous coolest
for September
Years of
record
Average for
September
Echuca Aerodrome -1.5 on the 2nd -1.0 on the 1st in 2007 56 6.3


Record lowest September mean daily minimum temperature
Mean daily minimum
temperature
for September 2012 (C)
Previous coolest
for September
Years of
record
Average for
September
Cape Nelson Lighthouse 8.7 = 8.7 in 2003 16 9.4


Summary statistics for September 2012
Maximum temperatures
for September
(C)
Minimum temperatures
for September
(C)
Rainfall
for September
(millimetres)
Mean for
September
2012
Diff
from
average
Highest for
September
2012
Mean for
September
2012
Diff
from
average
Lowest for
September
2012
Total for
September
2012
Average
for
September
Rank of
September
2012
Fraction of
September
average
North Mallee (district 76)
Mildura Airport 22.6 +2.2 36.4 27th 7.7 +0.4 1.7 25th 13.2 26.9 average 49%
Ouyen (Post Office) 22.0 +1.8 33.5 27th 7.3 +0.6 1.2 10th 10.6 32.4 low 33%
Walpeup Research 21.5 +2.0 32.9 27th 7.9 +1.0 3.1 1st 10.0 31.2 low 32%
South Mallee (district 77)
Hopetoun Airport 20.6 31.1 27th 5.5 -0.3 25th 21.0
Swan Hill Aerodrome 20.9 +0.7 32.7 27th 5.8 -0.1 -0.7 2nd 25.6 25.6 average 100%
North Wimmera (district 78)
Nhill Aerodrome 18.8 27.1 27th 6.1 -0.3 25th 27.2 27.2 high 100%
Warracknabeal Museum 19.2 +1.1 28.3 27th 5.6 -0.3 -0.6 25th 24.7 41.2 average 60%
South Wimmera (district 79)
Edenhope Airport 17.1 25.1 4th 6.3 -0.2 25th 29.6
Grampians (Mount William) 9.1 18.3 27th 2.4 -3.8 29th 126.0
Horsham Aerodrome 17.9 -0.2 27.2 27th 4.6 +0.2 -0.9 2nd 31.6 36.8 average 86%
Kanagulk 17.0 23.8 27th 5.5 -0.3 25th 36.8
Longerenong 17.9 +0.6 27.2 27th 4.8 -0.3 -1.0 25th 35.0 40.4 average 87%
Pyrenees (Ben Nevis) 12.4 21.2 27th 4.5 -1.7 29th 56.0
Stawell Aerodrome 16.7 +0.1 25.2 27th 6.6 +0.7 1.7 25th 31.0 52.6 low 59%
Lower North (district 80)
Charlton 19.2 29.5 27th 5.2 -0.9 2nd 23.2
Echuca Aerodrome 19.5 +1.2 31.5 27th 5.4 -0.9 -1.5 2nd 25.1 39.0 average 64%
Kerang 20.6 +1.5 32.3 27th 7.0 +0.3 1.0 2nd 32.6 35.5 average 92%
Kyabram 18.7 +1.2 29.6 27th 5.2 0.0 -1.1 2nd 17.2 42.5 low 40%
Upper North (district 81)
Bendigo Airport 17.5 +0.7 28.0 27th 4.8 +0.5 -1.5 2nd 33.4 50.1 low 67%
Shepparton Airport 18.2 0.0 26.5 27th 5.3 0.0 -1.2 2nd 10.2 38.3 low 27%
Tatura Inst Sustainable Ag 18.2 +0.8 27.5 27th 5.3 -0.1 -2.4 2nd 11.8 43.4 v low 27%
Yarrawonga 19.0 +0.5 28.1 27th 4.8 -0.3 -0.4 25th 21.0 42.1 low 50%
Lower Northeast (district 82)
Benalla Airport 18.1 26.2 28th 4.3 -1.3 1st 14.2
Corryong Airport 17.9 24.1 27th 2.6 -3.6 1st 45.6
Dartmouth Reservoir 16.8 +0.3 23.8 27th 4.8 +0.3 -2.2 1st 56.6 104.8 low 54%
Hunters Hill 12.8 +0.7 19.7 27th 4.2 -0.3 -1.0 1st 63.6 123.8 low 51%
Rutherglen Research 17.9 +0.7 25.1 28th 2.8 -1.4 -3.3 25th 13.4 54.2 v low 25%
Strathbogie 14.7 +0.5 22.5 27th 3.6 -0.1 -3.2 2nd 53.8 95.7 low 56%
Wangaratta Aero 18.2 +0.7 25.7 28th 4.1 -0.5 -1.7 2nd 23.2 55.0 v low 42%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 11.7 +0.5 18.8 27th 0.4 -0.2 -5.3 25th 88.0 84.4 average 104%
Falls Creek 5.0 +0.3 10.4 27th -0.8 +0.2 -5.8 1st 158.4 128.2 average 124%
Mount Buller 4.9 +0.1 12.3 27th -1.0 -0.2 -6.2 30th 130.6 149.4 average 87%
Mount Hotham 3.1 -0.3 9.6 27th -2.0 -0.4 -7.2 2nd
Omeo 15.7 23.1 27th 2.7 -4.4 25th 59.2
East Gippsland (district 84)
Combienbar AWS 16.4 +0.7 24.6 27th 6.8 +0.5 0.3 1st 47.0 66.4 average 71%
Gabo Island Lighthouse 17.0 +1.1 26.5 28th 10.0 +0.3 6.8 2nd 23.6 71.9 v low 33%
Gelantipy 14.4 +0.7 22.3 27th 5.1 +0.8 -0.2 1st 46.0 55.4 average 83%
Lakes Entrance (Eastern Beach Road) 18.5 29.2 27th 7.7 0.4 2nd 37.6
Mallacoota 17.7 +0.3 27.0 28th 8.4 +0.3 3.2 2nd 23.4 79.1 v low 30%
Mount Nowa Nowa 17.4 +0.5 26.1 27th 8.0 +0.2 3.1 1st 29.6 56.0 v low 53%
Orbost 18.3 +0.1 28.0 27th 7.7 +0.2 1.7 2nd 25.8 52.2 v low 49%
Point Hicks (Lighthouse) 17.2 +0.7 27.7 28th 9.5 0.0 5.2 2nd 38.8 74.9 low 52%
West Gippsland (district 85)
Bairnsdale Airport 18.8 +1.2 28.8 27th 6.0 +0.2 -1.4 2nd 29.4 52.7 low 56%
East Sale Airport 18.0 +1.0 27.9 27th 5.6 0.0 -1.0 2nd 39.8 51.5 average 77%
Morwell (Latrobe Valley Airport) 17.3 +0.4 26.8 27th 6.5 +0.7 0.5 2nd 86.4 77.5 average 111%
Mount Baw Baw 5.6 +0.1 13.4 27th -0.4 -0.1 -6.0 29th 215.6 150.5 average 143%
Mount Moornapa 16.8 +0.7 27.9 27th 7.2 +0.4 3.4 1st 41.0 52.1 average 79%
Pound Creek 16.4 24.4 27th 8.1 2.0 2nd 105.0
Wilsons Promontory Lighthouse 15.4 +1.2 24.9 27th 9.9 +0.9 4.9 29th 171.4 99.1 v high 173%
Yarram Airport 17.3 26.7 27th 6.7 -1.1 2nd 51.0
East Central (district 86)
Bundoora (Latrobe University) 17.8 +0.9 25.3 27th 7.6 +0.4 1.6 2nd 41.8 58.7 low 71%
Cerberus 16.8 +0.5 25.6 27th 7.9 +0.4 0.8 2nd 74.0 66.5 high 111%
Coldstream 17.3 +0.2 24.5 27th 6.4 +0.9 -0.5 2nd 62.0 70.9 average 87%
Coldstream Comparison 17.3 24.5 27th 6.2 -0.6 2nd 62.0
Cranbourne Botanic Gardens 17.3 +0.9 25.1 27th 8.0 +0.3 3.2 2nd 63.3 84.9 average 75%
Essendon Airport 17.9 +1.2 25.7 27th 7.9 +1.3 2.7 2nd 28.4 50.8 low 56%
Ferny Creek 13.7 21.2 27th 6.8 1.9 29th 73.8
Frankston AWS 15.9 +0.5 22.1 27th 9.8 +0.5 5.4 2nd
Melbourne Airport 17.7 +1.1 26.1 27th 7.3 +0.3 1.5 10th 27.6 46.4 low 59%
Melbourne Regional Office 18.6 +1.4 26.6 27th 9.9 +1.9 5.3 2nd 38.2 58.0 low 66%
Moorabbin Airport 17.2 +0.4 25.5 27th 8.6 +0.7 2.4 2nd 46.6 65.5 low 71%
Phillip Island Penguin Reserve 16.2 +0.1 22.8 27th 8.6 +0.3 2.7 2nd 75.0 69.4 high 108%
Rhyll 16.2 +0.3 23.0 27th 9.6 +0.3 5.9 2nd 77.2 67.0 average 115%
Scoresby Research Institute 17.5 +1.1 25.3 27th 8.0 +0.5 2.3 1st 49.0 84.1 low 58%
Viewbank 17.8 +0.1 25.3 27th 7.6 -0.1 1.2 2nd 36.8 54.6 average 67%
Wallan (Kilmore Gap) 13.8 +0.8 20.4 27th 5.9 +0.4 1.5 29th 35.6 57.5 low 62%
Wonthaggi 16.5 +0.5 25.0 27th 8.4 +0.7 3.0 2nd 102.0 89.2 average 114%
West Central (district 87)
Avalon Airport 17.4 -0.3 26.7 27th 7.1 +0.5 0.7 2nd 57.2 46.2 average 124%
Breakwater (Geelong Racecourse) 17.6 26.7 27th 8.1 3.5 26th 46.8
Laverton RAAF 17.6 +0.6 26.5 27th 7.3 +0.7 1.2 2nd 27.0 49.2 low 55%
Sheoaks 16.0 +0.6 24.4 27th 6.6 +0.5 1.2 25th 51.6 49.2 average 105%
North Central (district 88)
Castlemaine Prison 16.2 +0.6 25.5 27th 5.2 +0.3 -0.9 25th 41.0 60.7 average 68%
Eildon Fire Tower 13.9 +0.5 20.7 28th 5.7 0.0 1.5 29th 34.0 63.5 low 54%
Lake Eildon 17.3 +0.8 23.9 27th 6.1 +0.6 0.5 1st 56.2 82.1 low 68%
Mangalore Airport 17.5 +0.7 25.0 27th 4.6 -0.7 -2.3 2nd 16.2 55.1 v low 29%
Maryborough 17.5 +0.8 26.0 27th 5.3 -0.1 -0.3 2nd 31.9 51.8 average 62%
Redesdale 16.9 +0.8 25.6 27th 3.8 -0.4 -1.7 25th 32.0 53.7 average 60%
Western Plains (district 89)
Ararat Prison 16.3 +1.2 25.4 27th 6.2 +1.2 -0.9 25th 49.7 61.2 average 81%
Ballarat Aerodrome 14.6 +0.8 22.8 27th 4.7 -0.1 -1.5 25th 45.6 71.7 low 64%
Westmere 15.7 24.0 27th 5.4 -0.7 25th 38.2
West Coast (district 90)
Aireys Inlet 16.7 +0.6 25.2 27th 8.4 +0.3 3.3 29th 46.4 57.5 average 81%
Cape Nelson Lighthouse 16.2 +0.4 24.5 4th 8.7 -0.7 4.7 19th 59.8 75.1 low 80%
Cape Otway Lighthouse 15.1 -0.1 23.3 4th 9.0 +0.5 5.0 2nd 85.6 90.1 average 95%
Casterton 16.6 22.9 27th 6.1 1.2 29th 69.0
Colac (Mount Gellibrand) 14.7 +0.3 22.3 27th 7.0 +0.7 1.4 29th 54.8 49.5 average 111%
Dartmoor 16.8 23.6 4th 6.3 1.4 19th 51.6
Hamilton Airport 16.0 +0.8 23.0 27th 6.1 +0.3 0.8 29th 55.6 68.4 average 81%
Mortlake Racecourse 16.5 +0.9 23.8 27th 6.0 +0.4 2.3 29th 55.0 57.2 average 96%
Port Fairy AWS 17.1 +0.6 24.4 27th 8.2 0.0 3.4 29th 75.2 70.3 average 107%
Portland (Cashmore Airport) 16.1 +1.0 22.5 26th 7.0 -0.5 2.8 19th 73.2 86.8 average 84%
Portland NTC AWS 15.6 22.1 4th 8.8 4.9 3rd
Warrnambool Airport NDB 16.5 +0.6 23.0 27th 6.9 +0.2 1.6 29th 67.8 70.7 average 96%

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 10 am on Monday 1 October 2012. 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