Victoria in September 2010: Chilly days and unevenly distributed rain

  • Widespread flooding
  • Especially cold days
  • Overall average September rainfall

Rainfall

Widespread flooding extending across the north of the State was the major rainfall story this month. However, the flooding and majority of this months rainfall stemmed from a single broad low pressure system of tropical origin, which drenched Victoria from the 4th to the 6th. During this period, daily rainfall totals in excess of 60 mm were observed across the State, particularly to the north of the divide.

Also associated with this event, Whitlands experienced a normal Septembers rainfall in just one day, with over 135 mm falling on the 5th. Many stations state-wide recorded multi-day totals contributing a large proportion of average monthly rainfall due to this event. Multi-day rainfall totals over the northeast catchments of 100-150 mm were typical, with the top falls reported at Rocky Valley (243 mm), Whitlands (216 mm) and Myrrhee (181 mm).

Several frontal systems passed across Victoria this month resulting in generally cloudy conditions. However, the average rainfall for the entire State was very close to the long-term normal. Some locations, such as the Ballarat Aerodrome had more rain days than usual, recording 35 mm more than that normally received. Approximately 50 stations across the State recorded their highest total September rainfall for at least 10 years, with many stations experiencing their wettest September since 1993. The wettest overall was 334.0 mm at Falls Creek (Rocky Valley)

In contrast, Gippsland, in eastern Victoria, was very much below average again this month, with stations at Cann River and Club Terrace both recording their lowest September rainfall on record, less than a quarter of that usually received.

Temperature

Maximum temperature

Daytime temperatures were extraordinarily cold this month, Victoria experiencing its seventh coldest September days on record. The last time average maximum temperatures in September have been so low for Victoria was 1992.

Generally overcast conditions moderated daytime temperatures across the State. Several cold fronts and slow moving high pressure systems associated with south-westerly onshore flow brought cool, moist air over Victoria, particularly on the 6th, 28th and 29th. State-wide the warmest days were the 25th and 26th with sunny conditions pushing temperatures over 20C on the AFL Grand Final weekend.

In the north and west of the State, temperatures were significantly lower than the long-term September average. Mildura Airport, Swan Hill Aerodrome and a host of other stations experienced daytime temperatures more than 2C below normal this month. Interestingly, Mildura Airport, despite being significantly cooler than its long-term daytime average, was the warmest location in Victoria, averaging 18.3C.

Minimum temperature

Overnight temperatures were very close to normal this month. In the Mallee and Northern Country districts minimum temperatures were up to 1C cooler than normal, but were warmer than average along the coast of the Western district.

Cloud cover prevented significant overnight cooling, with particularly warm overnight temperatures on the 5th, associated with the warm, moist low pressure system which originated in the tropics and brought flooding rains to the north of the State. Stations in eastern Victoria observed the warmest night on the 5th, with temperatures in excess of 13C recorded at Orbost, Point Hicks Lighthouse and Lakes Entrance.

A slow moving high pressure system caused night-time temperatures to plummet on the 29th and 30th, with many locations in central Victoria recording frosty sub-zero temperatures. The coolest nights were recorded in the Alpine region, Mount Hotham the coldest, averaging just -2.5C overnight in September and experiencing an icy -7.6C on the 8th.

Wind Gusts

The strongest wind gust was 139 km/h at Falls Creek on the 4th, associated with the passing of the low pressure system, which intensified as it progressed to the south-east over South Australia and into Victoria.

Snow cover

The ski season concludes with more than half a metre of snow across the Alps, a most unusual outcome. This is a result of the cold end to winter and the chilly start to Spring.

Further information

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Enquiries

Extremes in September 2010
Hottest day 24.6 C at Bairnsdale Airport on the 4th
24.6 C at Orbost (Comparison) on the 4th
24.6 C at Lakes Entrance (Eastern Beach Road) on the 27th
Warmest days on average 18.3 C at Mildura Airport
Coolest days on average 2.5 C at Mount Hotham
Coldest day -2.6 C at Mount Hotham on the 16th
Coldest night -7.6 C at Mount Hotham on the 8th
Coolest nights on average -2.5 C at Mount Hotham
Warmest nights on average 9.4 C at Cape Nelson Lighthouse
9.4 C at Gabo Island Lighthouse
Warmest night 13.3 C at Orbost on the 5th
Wettest overall 334.0 mm at Falls Creek (Rocky Valley)
Wettest day 135.2 mm at Whitlands (Burder's Lane) on the 5th
Highest wind gust 139 km/h at Falls Creek on the 4th

Maps

Anomaly in mean maximum temperature

Map of Anomaly in mean maximum temperature

Mean maximum temperature

Map of Mean maximum temperature

Anomaly in mean minimum temperature

Map of Anomaly in mean minimum temperature

Mean minimum temperature

Map of Mean minimum temperature

Rainfall deciles

Map of Rainfall deciles

Rainfall totals

Map of Rainfall totals


Record highest total September rainfall
Total rainfall
for September 2010 (mm)
Previous highest
for September
Years of
record
Average for
September
Eildon Fire Tower 125.0 116.2 in 1998 15 66.3
Lima East (Charnwood) 191.0 173.5 in 1996 14 89.8
Boho (Honeysuckle Ck U/S Violet Town) 107.2 86.0 in 2009 10 60.5
Bullarto South 104.0 94.0 in 2005 10 74.2
Edi Upper (Black Range Trout Farm) 173.2 148.2 in 2005 10 95.8
Euroa (Castle Ck at Telford Bridge) 79.2 72.4 in 2004 10 47.0
Gooram (Hillside) 103.4 76.6 in 2004 10 53.5
Gooram (Morella) 119.4 89.8 in 2004 10 57.0
Halls (Buckland River at Twelve Mile) 209.8 173.4 in 2004 10 124.4
Holland Ck at Wrightley 144.0 125.0 in 2004 10 83.5
Merton (Enderlee) 107.8 80.8 in 2009 10 55.2
Moorabool River at Lal Lal 84.6 60.0 in 2004 10 51.0
Myrhee (Handcocks) 230.4 164.6 in 2004 10 121.3
Myrrhee (Cryers) 164.2 150.0 in 2004 10 94.6
Seven Creeks at Strathbogie 161.0 129.4 in 2004 10 80.4
Tolmie (Mount Tabletop Repeater) 172.0 136.0 in 2004 10 86.7
Too Rour (Moroko Park) 194.2 117.2 in 2004 10 74.6
Whitfield (King River at Cheshunt) 195.2 175.8 in 2005 10 110.8
Willowmavin (Avalon Station) 107.6 89.2 in 2009 10 55.0

Highest total September rainfall for at least 10 years
Total rainfall
for September 2010 (mm)
Most recent September
this high or higher
Years since
higher
Average for
September
Maryborough 113.0 137.8 in 1979 31 52.1
Mildura Airport 56.6 74.0 in 1992 18 27.5
Bendigo Airport 96.4 111.0 in 1993 17 51.0
Cobram (Goulburn Murray) 66.2 120.4 in 1993 17 43.7
Dunolly 100.8 127.2 in 1993 17 48.1
Eppalock Reservoir 71.6 119.0 in 1993 17 49.8
Lake Eildon 146.2 180.2 in 1993 17 82.3
Natte Yallock 96.4 111.8 in 1993 17 46.6
Redesdale 94.6 95.0 in 1992 17 54.0
Strath Creek 117.6 169.2 in 1993 17 69.0
Alexandra (Post Office) 114.4 158.2 in 1993 16 68.7
Hawkesdale (Post Office) 101.2 109.8 in 1993 16 73.7
Red Cliffs (Post Office) 51.8 52.2 in 1993 16 26.7
St Arnaud 107.2 111.7 in 1993 16 50.0
Yea 92.2 143.2 in 1993 15 63.2
Ballarat Aerodrome 107.8 129.6 in 1996 14 72.1
Donald 60.8 64.6 in 1996 14 39.2
Narraport 59.4 62.0 in 1996 14 35.6
Strathbogie 134.2 141.2 in 1996 14 96.1
Avoca (Homebush) 88.6 98.8 in 1997 13 52.4
Cairn Curran Reservoir 74.8 80.7 in 1997 13 48.8
Charlton (Donald St) 57.2 66.6 in 1997 13 43.3
Clunes 103.2 104.0 in 1996 13 56.6
Durdidwarrah 75.2 105.0 in 1996 13 69.0
Elmore 55.4 76.6 in 1997 13 44.3
Inglewood (Post Office) 65.2 90.3 in 1997 13 43.8
Raywood 61.2 67.8 in 1997 13 42.2
St Arnaud (Coonooer Bridge) 58.4 81.2 in 1997 13 43.0
Wedderburn (Post Office) 73.2 97.8 in 1997 13 47.4
Woomelang 50.2 52.2 in 1997 13 34.9
Acheron River @ Taggerty 122.0 164.8 in 1975 12 73.4
Beaufort 113.4 118.2 in 1997 12 70.4
Dimboola 77.2 87.6 in 1997 12 42.5
Nagambie (Goulburn Weir) 69.4 85.8 in 1998 12 54.3
Nullawarre 108.6 141.9 in 1996 12 89.1
Whitlands (Burder's Lane) 269.6 311.8 in 1998 12 137.6
Lake Buffalo 189.6 239.8 in 1998 11 117.7
Rushworth 74.4 79.8 in 1998 11 48.6
Castlemaine Prison 89.0 96.5 in 2000 10 61.2
Euroa 82.8 90.2 in 1996 10 60.8
Falls Creek 164.4 205.6 in 2000 10 127.4
Falls Creek (Rocky Valley) 334.0 351.0 in 2000 10 276.2
Heathcote 66.0 73.6 in 2000 10 55.1
Kyneton 116.8 129.8 in 2000 10 79.6
Lancefield 106.8 111.8 in 2000 10 74.7
Lima South (Lake Nillahcootie) 110.0 132.4 in 2000 10 93.6
Mangalore Airport 74.4 74.6 in 2000 10 56.0
Meredith (Darra) 68.8 101.8 in 2000 10 68.8
Portland (Cashmore Airport) 116.8 118.2 in 2000 10 88.1
Rainbow Post Office 54.4 88.9 in 1964 10 35.4
Rutherglen Research 59.0 86.0 in 2000 10 54.6
Trentham (Post Office) 123.2 155.8 in 2000 10 107.2
Wallan (Kilmore Gap) 95.0 101.4 in 2000 10 56.9
Warrenbayne 124.0 135.0 in 2000 10 83.3
Warrnambool Airport NDB 109.2 113.0 in 2000 10 73.1



Record lowest total September rainfall
Total rainfall
for September 2010 (mm)
Previous lowest
for September
Years of
record
Average for
September
Club Terrace 21.4 22.8 in 1972 50 90.4
Cann River 27.0 32.1 in 2008 36 84.7

Lowest total September rainfall for at least 10 years
Total rainfall
for September 2010 (mm)
Most recent September
this low or lower
Years since
lower
Average for
September
Buchan 21.0 17.5 in 1968 42 70.7
Lindenow 19.2 14.3 in 1968 40 53.3
Tubbut 16.8 7.7 in 1968 40 54.1
Cabbage Tree Creek 24.8 19.1 in 1968 38 88.8
Gabo Island Lighthouse 21.6 12.0 in 1972 38 72.5
Genoa (Fools Haven) 24.4 22.4 in 1973 37 79.2
Glenthompson 34.8 28.6 in 1981 29 61.5
Toora 42.8 42.6 in 1981 26 91.7
Combienbar AWS 26.0 7.6 in 1999 11 67.9



Record lowest September mean daily maximum temperature
Mean daily maximum
temperature
for September 2010 (C)
Previous lowest
for September
Years of
record
Average for
September
Mount Buller 2.8 3.2 in 2003 24 4.9
Redesdale 14.7 = 14.7 in 2003 17 16.1
Coldstream 15.1 15.7 in 2004 15 17.2
Cape Nelson Lighthouse 13.9 14.7 in 1997 14 15.8
Eildon Fire Tower 11.5 = 11.5 in 2003 14 13.5
Shepparton Airport 15.7 15.9 in 2003 14 18.3
Stawell Aerodrome 15.0 15.1 in 2003 14 16.7
Swan Hill Aerodrome 17.6 18.2 in 2003 13 20.3
Horsham Aerodrome 15.9 16.2 in 2003 12 18.2
Mount Baw Baw 2.9 4.0 in 2001 12 5.7
Warrnambool Airport NDB 14.4 14.9 in 2003 11 16.0
Colac (Mount Gellibrand) 12.4 13.1 in 2005 10 14.4
Viewbank (ARPANSA) 15.5 16.4 in 2004 10 17.8

Lowest September mean daily maximum temperature for at least 10 years
Mean daily maximum
temperature
for September 2010 (C)
Most recent September
this low or lower
Years since
lower
Average for
September
Casterton Showgrounds 15.1 14.6 in 1992 18 16.4
East Sale Airport 15.9 14.9 in 1992 18 17.0
Echuca Aerodrome 16.6 15.2 in 1992 18 18.3
Laverton RAAF 15.6 14.1 in 1992 18 17.0
Longerenong 15.7 14.7 in 1992 18 17.3
Maryborough 15.2 13.6 in 1992 18 16.7
Melbourne Airport 15.1 13.7 in 1992 18 16.6
Mildura Airport 18.3 17.0 in 1992 18 20.4
Morwell (Latrobe Valley Airport) 15.1 14.3 in 1992 18 16.9
Ouyen (Post Office) 18.2 16.9 in 1992 18 20.2
Port Fairy AWS 15.0 14.4 in 1992 18 16.6
Portland (Cashmore Airport) 13.5 12.8 in 1992 18 15.1
Tatura Inst Sustainable Ag 15.8 14.9 in 1992 18 17.4
Walpeup Research 17.7 16.3 in 1992 18 19.5
Warracknabeal Museum 16.6 15.2 in 1992 18 18.1
Willow Grove (Blue Rock Reservoir) 14.3 13.0 in 1992 18 16.2
Cape Otway Lighthouse 13.1 12.8 in 1992 17 15.2
Kerang 17.2 15.8 in 1992 17 19.1
Scoresby Research Institute 15.1 14.1 in 1992 17 16.4
Ararat Prison 14.1 13.9 in 1994 16 15.0
Bundoora (Latrobe University) 15.6 15.2 in 1994 16 16.9
Castlemaine Prison 14.2 =14.2 in 1994 16 15.6
Cerberus 14.8 14.7 in 1994 16 16.3
Cranbourne Botanic Gardens 14.8 14.6 in 1994 16 16.4
Ferny Creek (Dunns Hill) 10.4 10.2 in 1994 16 12.6
Frankston AWS 13.6 12.5 in 1994 16 15.5
Lake Eildon 15.3 15.1 in 1994 16 16.5
Melbourne Regional Office 16.5 16.0 in 1994 16 17.2
Moorabbin Airport 15.1 =15.1 in 1994 16 16.8
Mortlake Racecourse 14.0 13.9 in 1994 16 15.6
Noojee (Slivar) 13.4 13.1 in 1994 16 15.4
Point Hicks (Lighthouse) 15.3 15.1 in 1994 16 16.5
Rhyll 14.6 14.4 in 1994 16 15.9
Weeaproinah 9.9 9.8 in 1994 16 11.6
Wonthaggi 14.8 14.7 in 1994 16 16.0
Ballarat Aerodrome 12.3 =12.3 in 1994 15 13.8
Grovedale (Geelong Airport) 15.2 =15.2 in 1995 15 16.6
Sheoaks 13.7 =13.7 in 1995 15 15.4
Wallan (Kilmore Gap) 11.2 10.9 in 1995 15 13.1
Bairnsdale Airport 16.6 16.3 in 1995 14 17.6
Hamilton Airport 13.8 =13.8 in 1996 14 15.2
Aireys Inlet 14.7 14.5 in 1997 13 16.1
Avalon Airport 15.9 =15.9 in 1997 13 17.7
Combienbar AWS 14.1 13.2 in 1997 13 15.7
Gabo Island Lighthouse 15.6 =15.6 in 1997 13 15.9
Gelantipy 12.8 11.9 in 1997 13 13.8
Mallacoota 16.3 16.0 in 1997 13 17.4
Mount Moornapa 14.8 14.6 in 1997 13 16.1
Mount Nowa Nowa 15.5 14.9 in 1997 13 17.0
Orbost (Comparison) 17.1 16.7 in 1997 13 17.9
Wilsons Promontory Lighthouse 12.9 =12.9 in 1997 13 14.2



Record lowest September temperature
Lowest temperature
in September 2010 (C)
Previous lowest
for September
Years of
record
Average for
September
Cape Nelson Lighthouse 3.0 on the 7th = 3.0 on the 25th in 1998 15 9.4



Record lowest September mean daily minimum temperature
Mean daily minimum
temperature
for September 2010 (C)
Previous lowest
for September
Years of
record
Average for
September
Swan Hill Aerodrome 4.9 5.1 in 2007 13 6.1
Dinner Plain (Mount Hotham Airport) -0.9 -0.5 in 2007 10 0.7

Lowest September mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for September 2010 (C)
Most recent September
this low or lower
Years since
lower
Average for
September
Walpeup Research 6.0 5.8 in 1994 16 6.9



Summary statistics for September 2010
Maximum temperatures
for September
(C)
Minimum temperatures
for September
(C)
Rainfall
for September
(millimetres)
Mean for
September
2010
Diff
from
average
Highest for
September
2010
Mean for
September
2010
Diff
from
average
Lowest for
September
2010
Total for
September
2010
Average
for
September
Rank of
September
2010
Fraction of
September
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 16.6 -1.3 20.6 26th 5.5 -0.2 -0.1 30th 75.6 59.5 high 127%
Hume Reservoir 16.4 -0.9 21.2 26th 6.3 -0.4 0.9 30th 80.2 62.2 high 129%
North Mallee (district 76)
Mildura Airport 18.3 -2.1 23.2 25th 6.8 -0.6 1.6 30th 56.6 27.5 v high 206%
Ouyen (Post Office) 18.2 -2.0 22.4 25th 6.5 -0.2 1.9 29th 42.2 32.7 high 129%
Walpeup Research 17.7 -1.8 22.3 25th 6.0 -0.9 0.8 29th 37.6 31.7 average 119%
South Mallee (district 77)
Hopetoun Airport 17.0   21.1 9th 4.5   -1.5 24th 43.8
Swan Hill Aerodrome 17.6 -2.7 22.3 25th 4.9 -1.2 0.4 24th 16.4 26.4 low 62%
North Wimmera (district 78)
Nhill Aerodrome 16.2   20.9 9th 5.7   0.0 30th 49.2
Warracknabeal Museum 16.6 -1.5 20.0 25th 5.7 -0.2 0.2 30th 58.2 42.3 high 138%
South Wimmera (district 79)
Edenhope Airport 14.9   18.8 9th 6.6   0.8 7th 63.2
Grampians (Mount William) 6.8   12.2 26th 0.9   -2.0 29th 137.0
Horsham Aerodrome 15.9 -2.3 19.9 25th 4.7 +0.3 -1.5 30th 42.8 39.2 high 109%
Horsham Polkemmet Rd 16.2 -1.4 20.0 25th 5.1 -0.4 0.5 29th 41.2 46.2 average 89%
Kanagulk 14.7   19.1 9th 6.0   0.4 30th 49.0
Longerenong 15.7 -1.6 19.3 9th 4.5 -0.6 -1.7 30th 45.6 40.7 average 112%
Pyrenees (Ben Nevis) 9.3   13.9 26th 2.6   -0.7 29th 111.0
Stawell Aerodrome 15.0 -1.7 18.6 25th 5.9 0.0 0.9 30th 66.6 56.7 average 117%
Lower North (district 80)
Charlton 16.5   19.7 26th 5.3   0.1 30th 64.4
Echuca Aerodrome 16.6 -1.7 20.9 26th 5.2 -1.1 0.2 30th 42.0 39.2 average 107%
Kerang 17.2 -1.9 21.3 25th 6.0 -0.7 1.9 29th 33.4 35.6 average 94%
Kyabram DPI 16.5 -1.0 20.5 26th 4.5 -0.8 -1.5 30th 48.4 42.8 average 113%
Upper North (district 81)
Bendigo Airport 15.5 -1.3 19.6 26th 4.0 -0.3 -2.1 30th 96.4 51.0 high 189%
Shepparton Airport 15.7 -2.6 20.5 26th 5.3 0.0 -0.4 30th 64.2 40.0 high 161%
Tatura Inst Sustainable Ag 15.8 -1.6 20.2 26th 4.5 -0.9 -1.8 30th 52.6 43.8 average 120%
Yarrawonga 16.8 -1.7 22.2 25th 4.4 -0.8 -0.1 30th 24.4 43.7 low 56%
Lower Northeast (district 82)
Benalla Airport 16.2   21.0 21st 4.8   -1.2 30th 69.4
Corryong Airport 16.6   21.9 21st 3.7   -1.9 30th 106.4
Dartmouth Reservoir 15.7 -0.8 21.6 21st 4.7 +0.2 -1.3 30th 112.6 106.1 average 106%
Hunters Hill 11.1 -1.0 17.2 21st 4.0 -0.5 -0.5 29th 166.4 128.2 average 130%
Rutherglen Research 16.2 -1.0 20.6 25th 3.6 -0.6 -1.9 30th 59.0 54.6 average 108%
Strathbogie 12.9 -1.3 16.8 26th 3.1 -0.6 -2.1 30th 134.2 96.1 high 140%
Wangaratta Aero 16.5 -1.0 20.9 21st 4.8 +0.2 -0.9 30th 59.0 56.7 average 104%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 10.4 -0.8 16.4 24th -0.9 -1.6 -6.1 8th 77.4 84.1 low 92%
Edi Upper 15.5 -0.7 20.6 21st 4.7 -0.8 0.2 30th 137.8 107.7 high 128%
Falls Creek 3.9 -0.8 11.3 20th -1.8 -0.9 -7.2 30th 164.4 127.4 high 129%
Mount Buller 2.8 -2.1 9.4 20th -2.1 -1.4 -6.4 29th 234.6 151.0 high 155%
Mount Hotham 2.5 -0.9 9.2 21st -2.5 -0.9 -7.6 8th 227.2 134.5 high 169%
Omeo 14.3   18.6 26th 2.0   -2.7 17th 42.8
East Gippsland (district 84)
Combienbar AWS 14.1 -1.6 20.9 4th 5.4 -1.0 2.0 30th 26.0 67.9 v low 38%
Gabo Island Lighthouse 15.6 -0.3 20.7 27th 9.4 -0.3 6.0 29th 21.6 72.5 v low 30%
Gelantipy 12.8 -1.0 19.3 26th 3.6 -0.8 -0.6 3rd 37.6 56.6 low 66%
Lakes Entrance (Eastern Beach Road) 16.6   24.6 27th 7.7   2.6 3rd 33.0
Mallacoota 16.3 -1.1 21.0 27th 7.8 -0.3 3.6 3rd 24.0 81.5 v low 29%
Mount Nowa Nowa 15.5 -1.5 22.1 27th 6.7 -1.2 3.0 8th 35.8 57.3 low 62%
Orbost 16.6   24.2 4th 7.1   1.6 8th 33.2 56.4 average 59%
Orbost (Comparison) 17.1 -0.8 24.6 4th 6.2 -0.1 0.1 8th 37.2 71.1 low 52%
Point Hicks (Lighthouse) 15.3 -1.2 20.3 27th 9.0 -0.5 4.4 30th 40.7 76.0 low 54%
West Gippsland (district 85)
Bairnsdale Airport 16.6 -1.0 24.6 4th 5.6 -0.2 -0.2 8th 25.6 53.8 low 48%
East Sale Airport 15.9 -1.1 22.0 27th 5.6 0.0 -0.8 3rd 17.6 51.7 v low 34%
Morwell (Latrobe Valley Airport) 15.1 -1.8 19.6 26th 6.0 +0.2 0.5 3rd 52.8 77.4 low 68%
Mount Baw Baw 2.9 -2.8 9.9 26th -1.7 -1.6 -5.1 29th 148.0 136.3 average 109%
Mount Moornapa 14.8 -1.3 20.7 26th 5.9 -1.0 2.0 3rd 27.8 52.6 low 53%
Noojee (Slivar) 13.4 -2.0 20.0 26th 5.5 +0.4 0.2 3rd 120.6 125.7 average 96%
Pound Creek 14.6   18.4 9th 7.7   0.6 3rd 69.0
Willow Grove (Blue Rock Reservoir) 14.3 -1.9 18.8 26th     1.5 20th 45.0 79.0 v low 57%
Wilsons Promontory Lighthouse 12.9 -1.3 16.3 12th 9.3 +0.4 5.5 29th 94.2 98.7 average 95%
Yarram Airport 15.3   20.7 26th 6.0   -0.3 3rd 27.8
East Central (district 86)
Bundoora (Latrobe University) 15.6 -1.3 21.2 26th 7.7 +0.5 2.2 8th 43.8 58.9 low 74%
Cerberus 14.8 -1.5 18.1 25th 7.8 +0.4 1.9 3rd 63.0 66.5 average 95%
Coldstream 15.1 -2.1 20.9 26th 6.0 +0.6 0.3 3rd 72.6 69.5 average 104%
Coldstream Comparison 15.1   20.9 26th 5.9   0.2 3rd 72.2
Cranbourne Botanic Gardens 14.8 -1.6 17.9 4th 7.6 -0.1 3.0 3rd 68.9 86.0 average 80%
Essendon Airport 15.4 -1.2 20.9 26th 7.1 +0.6 1.5 8th 42.2 50.8 average 83%
Ferny Creek (Dunns Hill) 10.4 -2.2 16.9 26th 4.9 -1.1 0.9 29th 99.8 92.0 average 108%
Frankston AWS 13.6 -1.9 18.0 4th 9.3 0.0 5.7 8th
Melbourne Airport 15.1 -1.5 21.2 26th 6.8 -0.2 1.9 14th 40.2 46.1 average 87%
Melbourne Regional Office 16.5 -0.7 22.1 26th 9.1 +1.2 5.2 8th 49.6 58.0 average 86%
Moorabbin Airport 15.1 -1.7 19.3 26th 8.3 +0.4 2.2 8th 57.2 65.6 average 87%
Rhyll 14.6 -1.3 17.8 26th 9.2 -0.1 6.5 29th 73.8 67.2 average 110%
Scoresby Research Institute 15.1 -1.3 20.8 26th 7.0 -0.5 1.0 8th 56.0 84.6 low 66%
Viewbank (ARPANSA) 15.5 -2.3 21.1 26th 7.6 -0.1 2.5 14th 52.4 53.7 average 98%
Wallan (Kilmore Gap) 11.2 -1.9 16.2 26th 4.8 -0.7 1.5 29th 95.0 56.9 high 167%
Wonthaggi 14.8 -1.2 18.0 9th 8.1 +0.5 3.4 3rd 77.9 89.3 average 87%
West Central (district 87)
Avalon Airport 15.9 -1.8 19.7 26th 6.6 0.0 1.3 8th 54.0 46.1 average 117%
Grovedale (Geelong Airport) 15.2 -1.4 20.0 9th 6.8 +0.2 1.8 8th 53.4 49.7 average 107%
Laverton RAAF 15.6 -1.4 19.3 25th 6.9 +0.3 1.3 8th 41.6 49.6 average 84%
Sheoaks 13.7 -1.7 18.8 26th 6.3 +0.2 0.8 14th 61.2 49.7 high 123%
North Central (district 88)
Castlemaine Prison 14.2 -1.4 18.7 26th 4.6 -0.3 -2.0 30th 89.0 61.2 high 145%
Eildon Fire Tower 11.5 -2.0 17.5 26th 4.4 -1.4 1.0 29th 125.0 66.3 highest 189%
Lake Eildon 15.3 -1.2 20.5 26th 5.0 -0.6 0.8 3rd 146.2 82.3 v high 178%
Mangalore Airport 15.6 -1.1 20.2 26th 4.8 -0.5 -1.2 29th 74.4 56.0 high 133%
Maryborough 15.2 -1.5 19.3 27th 5.2 -0.2 0.4 30th 113.0 52.1 v high 217%
Redesdale 14.7 -1.4 19.3 26th 3.8 -0.4 -1.5 30th 94.6 54.0 high 175%
Western Plains (district 89)
Ararat Prison 14.1 -0.9 18.2 25th 5.7 +0.7 -1.1 30th 63.2 62.5 average 101%
Ballarat Aerodrome 12.3 -1.5 16.9 26th 5.0 +0.2 -0.3 30th 107.8 72.1 high 150%
Westmere 13.7   17.7 26th 6.0   0.7 14th 55.6
West Coast (district 90)
Aireys Inlet 14.7 -1.4 18.7 25th 7.8 -0.2 5.0 29th 60.4 59.6 average 101%
Cape Nelson Lighthouse 13.9 -1.9 18.0 9th 9.4 0.0 3.0 7th 75.0 77.9 average 96%
Cape Otway Lighthouse 13.1 -2.1 17.7 4th 8.9 +0.4 6.5 30th 78.6 90.3 average 87%
Casterton 14.5   18.2 9th 6.1   0.2 7th 65.6
Casterton Showgrounds 15.1 -1.3 19.0 25th 6.5 +0.1 -0.5 7th 77.6 73.9 average 105%
Colac (Mount Gellibrand) 12.4 -2.0 15.9 25th 5.7 -0.6 2.3 29th 58.2 51.4 average 113%
Dartmoor 14.4   17.9 25th 6.7   0.0 7th 91.0
Hamilton Airport 13.8 -1.4 17.2 25th 5.7 -0.1 -0.2 14th 59.6 70.3 average 85%
Mortlake Racecourse 14.0 -1.6 18.0 4th 6.2 +0.7 0.6 14th 65.6 58.1 average 113%
Port Fairy AWS 15.0 -1.6 19.3 9th 8.9 +0.7 6.1 30th 87.4 70.7 high 124%
Portland (Cashmore Airport) 13.5 -1.6 16.8 9th 7.8 +0.3 2.7 7th 116.8 88.1 high 133%
Warrnambool Airport NDB 14.4 -1.6 18.0 25th 7.2 +0.6 3.4 2nd 109.2 73.1 high 149%
Weeaproinah 9.9 -1.7 13.7 4th 5.2 -0.4 2.6 29th 211.4 200.0 average 106%

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 11 am on Friday 1 October 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

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