Victoria in May 2012: Rainfall slightly less than that usually received

Highlights:

  • Overnight temperatures cooler than those in most years
  • Daytime temperatures near to those in most years
  • Rainfall slightly less than that in most years

Weather Summary

Bureau of Meteorology data show that across the State of Victoria, overnight minimum temperatures were cooler than those usually experienced. Daytime maximum temperatures at most localities were near to those registered in the past. Total rainfall for the month was generally slightly less than that usually recorded.

Specifically over the northern plains, minimum temperatures were much cooler than those usually experienced, especially close to the Murray River. Daytime maximum temperatures at most localities were near to those registered in the past, but in the northwest, daytime temperatures were slightly above normal. Total rainfall for the month was generally less than that usually recorded.

Specifically in southern districts, minimum temperatures were near to those usually experienced as also were daytime maximum temperatures. Total rainfall for the month was generally close to that usually recorded.

Synoptic summary

The month was characterised by strong anticyclones positioning themselves to the south of the Great Australian Bight, with Mean Sea Level pressures averaging up to 4 hPa above normal. To the east of Tasmania, low pressure systems persisted, with Mean Sea Level pressures averaging up to 4 hPa below normal.

Between these two features, cold, and relatively dry (low humidity) air was directed from the southwest or south across Victoria. 

This southwest to southerly flow brought some showery weather to southern districts (hence, the near normal rainfall there) but, with most of the moisture captured south of the Great Dividing Range, northern Victoria had a dry month, with relatively low overnight temperatures.

Details

In the Mallee, overnight minimum temperatures were much cooler than those usually experienced (average departure from normal -1.7C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.9C). Total rainfall for the month  was generally much less than usual  (average percentage of normal received 14%).

In the Wimmera, overnight minimum temperatures were cooler than those usually experienced (average departure from normal -1.3C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.5C). Total rainfall for the month  was generally much less  than usual (average percentage of normal received 49%).

In the Northern Country, overnight minimum temperatures were cooler than those usually experienced (average departure from normal -1.2C). Daytime maximum temperatures at most localities were near to those registered in the past (average departure from normal 0.2C). Total rainfall for the month  was generally much less than usual (average percentage of normal received 43%).

In Victoria's North Central District, overnight minimum temperatures were much cooler than those usually experienced (average departure from normal -1.5C). Daytime maximum temperatures at most localities were near to those registered in the past (average departure from normal -0.1C). Total rainfall for the month  was generally slightly less than usual (average percentage of normal received 82.5%).

In the North East District, overnight minimum temperatures were much cooler than those usually experienced (average departure from normal -2.1C). Daytime maximum temperatures at most localities were slightly cooler than those registered in the past (average departure from normal -0.7C). Total rainfall for the month  was generally less than usual (average percentage of normal received 63.3%).

In East Gippsland, overnight minimum temperatures were near to those usually experienced (average departure from normal -0.2C). Daytime maximum temperatures at most localities were near to those registered in the past (average departure from normal -0.1C). Total rainfall for the month  was generally less than usual (average percentage of normal received 61.5%).

In West Gippsland, overnight minimum temperatures were near to those usually experienced (average departure from normal -0.2C). Daytime maximum temperatures at most localities were near to those registered in the past (average departure from normal 0C). Total rainfall for the month  was generally slightly more than usual (average percentage of normal received 126%).

In the Central District, overnight minimum temperatures were near to those usually experienced (average departure from normal 0C). Daytime maximum temperatures at most localities were slightly cooler than those registered in the past (average departure from normal -0.6C). Total rainfall for the month  was generally more than usual (average percentage of normal received 137%).

In the Western District, overnight minimum temperatures were slightly cooler than those usually experienced (average departure from normal -0.7C). Daytime maximum temperatures at most localities were slightly cooler than those registered in the past (average departure from normal -0.5C). Total rainfall for the month  was generally slightly less than usual (average percentage of normal received 82.5%).

Melbourne climate summary for the month of May 2012

Rainfall more than that usually received.

Located in the Central District at the head of Port Phillip Bay, Melbourne is Victoria's State Capital. Here, overnight minimum temperatures were warmer than those usually experienced and averaged 10.0C (departure from normal 1.4C). That the overnight temperatures in Melbourne are higher than those in most surrounding localities is a consequence of the city being under the influence of the effect of urbanisation (cities are usually warmer than their rural surroundings, especially at night, because of heat stored in bricks and concrete and trapped between close-packed buildings). Daytime maximum temperatures were near to those usually experienced and averaged 17.0C (departure from normal 0.3C). Total rainfall for the month  was 80.0 mm (normal 56.0 mm, percentage of normal received 143%).

Selected Melbourne suburbs

In the suburb of Essendon, which is located some 15 kilometres to the northwest of the city centre, overnight minimum temperatures were slightly warmer than those usually experienced and averaged 8.4C (departure from normal 0.7C). Daytime maximum temperatures were near to those usually experienced and averaged 16C (departure from normal -0.1C). Total rainfall for the month  was 70.8 mm (normal 49.4 mm, percentage of normal received 143%).

The suburb of Laverton is located some 30 kilometres to the southwest of the city centre, and is often under the drying influence of the rain shadow from the ranges of western Victoria. Here, overnight minimum temperatures were near to those usually experienced and averaged 7.7C (departure from normal -0.1C). Daytime maximum temperatures were near to those usually experienced and averaged 16.6C (departure from normal -0.2C). Total rainfall for the month  was 67.4 mm (normal 46.8 mm, percentage of normal received 144%).

In the suburb of Bundoora, which is located some 20 kilometres to the northeast of the city centre, overnight minimum temperatures were slightly warmer than those usually experienced and averaged 8.7C (departure from normal 0.8C). Daytime maximum temperatures were slightly cooler than those usually experienced and averaged 16C (departure from normal -0.6C). Total rainfall for the month  was 86.4 mm (normal 52.2 mm, percentage of normal received 166%).

In the suburb of Moorabbin, which is located some 20 kilometres to the southeast of the city centre, overnight minimum temperatures were slightly warmer than those usually experienced and averaged 9.2C (departure from normal 0.6C). Daytime maximum temperatures were slightly cooler than those usually experienced and averaged 16.2C (departure from normal -0.7C). Total rainfall for the month  was 93.2 mm (normal 70.6 mm, percentage of normal received 132%).

Rainfall

The wettest overall was Foster Hoddle with 248.0 mm.

Some sites had their highest total May rainfall on record.

Some sites had their highest total May rainfall for at least 10 years.

Some sites had their lowest total May rainfall on record.

Some sites had their lowest total May rainfall for at least 10 years.

There is a map of total rainfall below.

There is a map of rainfall deciles below.

Temperature

The warmest on average was Gabo Island Lighthouse, Melbourne Regional Office and Point Hicks (Lighthouse) all with 13.5 C. The coolest on average was Mount Hotham with 0.8 C.

Maximum temperature

The hottest day was at Ouyen (Post Office) with 28.2 C on the 8th. The warmest days on average were at Mildura Airport with 19.8 C. The coolest days on average were at Mount Hotham with 3.1 C. The coldest day was at Mount Hotham with -2.7 C on the 25th.

Some sites had their highest May temperature on record.

Some sites had their coldest May day (lowest maximum temperature) on record.

Some sites had their lowest May mean daily maximum temperature for at least 10 years.

There is a map of mean maximum temperatures below.

There is a map of maximum temperature anomalies below.

Minimum temperature

The coldest night was at Dinner Plain (Mount Hotham Airport) with -5.9 C on the 31st.

The coolest nights on average were at Mount Hotham with -1.5 C.

The warmest nights on average were at Wilsons Promontory Lighthouse with 11.4 C.

The warmest night was the 9th when both Mildura Airport and Point Hicks (Lighthouse) recorded 15.7 C.

Some sites had their lowest May temperature on record.

Some sites had their lowest May mean daily minimum temperature on record.

Some sites had their lowest May mean daily minimum temperature for at least 10 years.

There is a map of mean minimum temperatures below.

There is a map of minimum temperature anomalies below.

Wind

The strongest wind gust was at Wilsons Promontory Lighthouse with 139 km/h on the 12th.

Further information

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Extremes in May 2012
Hottest day 28.2 C at Ouyen (Post Office) on the 8th
Warmest days on average 19.8 C at Mildura Airport
Coolest days on average 3.1 C at Mount Hotham
Coldest day -2.7 C at Mount Hotham on the 25th
Coldest night -5.9 C at Dinner Plain (Mount Hotham Airport) on the 31st
Coolest nights on average -1.5 C at Mount Hotham
Warmest nights on average 11.4 C at Wilsons Promontory Lighthouse
Warmest night 15.7 C at Mildura Airport on the 9th
15.7 C at Point Hicks (Lighthouse) on the 9th
Warmest on average overall 13.5 C at Gabo Island Lighthouse
13.5 C at Melbourne Regional Office
13.5 C at Point Hicks (Lighthouse)
Coolest on average overall 0.8 C at Mount Hotham
Wettest overall 248.0 mm at Foster Hoddle
Highest wind gust 139 km/h at Wilsons Promontory Lighthouse on the 12th

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 May rainfall
Total rainfall
for May 2012 (mm)
Previous wettest
for May
Years of
record
Average for
May
Phillip Island Penguin Reserve 150.2 121.4 in 2000 30 70.4
Cerberus 165.0 128.0 in 2000 21 68.8
Aireys Inlet 115.0 110.4 in 2000 18 51.0
Rhyll 177.6 109.4 in 2000 18 72.7
Foster Hoddle 248.0 173.4 in 2006 16 98.0
Avon River @ The Channel 57.0 49.2 in 2006 12 26.6
Lorne (Mount Cowley) 139.6 132.8 in 2002 12 91.8
Traralgon Creek at Koornalla 130.8 104.4 in 2006 12 62.4
Traralgon EPA 87.2 66.2 in 2006 12 41.0
Bairnsdale (Mitchell River @ Rosehill) 66.2 60.2 in 2010 10 35.2
Barwon Heads Golf Club 105.8 55.2 in 2011 10 41.7
Boolarra South 188.0 130.8 in 2006 10 96.2
Halls (Buckland River at Twelve Mile) 84.6 81.0 in 2002 10 54.5

Highest total May rainfall for at least 10 years
Total rainfall
for May 2012 (mm)
Most recent May
at least this wet
Years since
wetter
Average for
May
Rosebud (Country Club) 170.6 216.5 in 1960 52 82.2
Ventnor (Oaklands) 152.8 180.6 in 1968 44 78.9
Wonthaggi 215.8 273.8 in 1968 44 98.1
Drouin Bowling Club 190.4 193.7 in 1968* 43 93.2
Springvale Necropolis 115.9 178.6 in 1974 38 82.3
Labertouche 109.8 136.4 in 1974* 34 79.2
Altona (City Offices) 92.7 95.7 in 1981* 25 51.3
Avalon Airport 68.6 69.4 in 1978* 25 35.7
Toora 147.8 171.8 in 1988* 21 86.5
Laverton RAAF 67.4 68.6 in 1995 17 46.8
Essendon Airport 70.8 119.5 in 1981* 15 49.4
Bonbeach (Carrum) 85.3 107.6 in 1997* 13 68.6
Apollo Bay 128.8 162.2 in 2000 12 97.5
Cobden (Post Office) 102.6 130.2 in 2000 12 80.7
East Sale Airport 62.2 84.4 in 2000 12 51.8
Erica (Parkers Corner) 116.4 162.4 in 2000 12 91.6
Hamilton Airport 72.0 89.8 in 2000 12 49.2
Hawkesdale (Post Office) 91.8 104.8 in 2000 12 65.3
Melbourne Airport 53.0 78.4 in 2000 12 40.4
Melbourne Regional Office 80.0 91.0 in 2000 12 56.0
Mirboo North Water Board 135.4 159.6 in 2000 12 93.9
Moorabbin Airport 93.2 105.2 in 2000 12 70.6
Mornington 121.2 132.4 in 2000 12 69.9
Morwell (Latrobe Valley Airport) 96.8 112.6 in 2000 12 53.7
Oakleigh (Metropolitan Golf Club) 123.1 123.6 in 2000 12 70.5
Prahran (Como House) 96.2 110.8 in 2000 12 59.2
Preston Reservoir 88.4 112.0 in 2000 12 57.9
Sheoaks 56.4 74.2 in 2000 12 32.9
Toorourrong Reservoir (Toorourrong) 94.8 152.2 in 2000 12 68.3
Viewbank 74.4 144.0 in 2000 12 53.1
Willow Grove 109.2 140.6 in 2000 12 71.3
Yan Yean 79.6 134.8 in 2000 12 56.2
Bundoora (Latrobe University) 86.4 122.4 in 2000* 11 52.2
Cheltenham Kingston Centre 97.6 100.4 in 2000* 11 68.8
Cranbourne Botanic Gardens 114.0 153.4 in 2000* 11 64.1
Kinglake West 120.0 205.2 in 2000* 11 87.8
Maffra 69.2 93.8 in 2000* 11 35.6
Scoresby Research Institute 102.8 136.4 in 2000* 11 88.7
Eltham 78.5 84.9 in 2000* 10 66.0
Yarra River @ Warrandyte 86.6 95.4 in 2002 10 49.5

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.




Record lowest total May rainfall
Total rainfall
for May 2012 (mm)
Previous driest
for May
Years of
record
Average for
May
Harrow (Post Office) 0.5 4.8 in 1934 101 58.2
Boonah 12.0 24.0 in 2005 12 62.1

Lowest total May rainfall for at least 10 years
Total rainfall
for May 2012 (mm)
Most recent May
at least this dry
Years since
drier
Average for
May
Rainbow Post Office 2.8 0.8 in 1938* 37 36.8
Mildura Airport 2.4 1.6 in 1998 14 25.1

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported.




Record highest May temperature
Highest temperature
in May 2012 (C)
Previous warmest
for May
Years of
record
Average for
May
Mount Moornapa 24.0 on the 9th 23.3 on the 23rd in 1999 19 14.6



Record lowest May daily maximum temperature
Lowest daily maximum
temperature
in May 2012 (C)
Previous coolest
for May
Years of
record
Average for
May
Edi Upper 6.4 on the 25th 6.6 on the 29th in 2000 25 16.6
Combienbar AWS 6.1 on the 13th 6.8 on the 14th in 2011 18 14.1
Colac (Mount Gellibrand) 9.3 on the 25th 9.6 on the 11th in 2010 12 15.0
Dinner Plain (Mount Hotham Airport) 3.1 on the 25th 3.5 on the 25th in 2011 12 10.8



Lowest May mean daily maximum temperature for at least 10 years
Mean daily maximum
temperature
for May 2012 (C)
Most recent May
at least this cool
Years since
cooler
Average for
May
Dartmouth Reservoir 14.5 13.9 in 2000 12 16.0



Record lowest May temperature
Lowest temperature
in May 2012 (C)
Previous coolest
for May
Years of
record
Average for
May
Warracknabeal Museum -2.0 on the 21st = -2.0 on the 16th in 1999 39 6.5



Record lowest May mean daily minimum temperature
Mean daily minimum
temperature
for May 2012 (C)
Previous coolest
for May
Years of
record
Average for
May
Albury Airport AWS 3.8 = 3.8 in 2006 19 5.4
Gelantipy 4.0 = 4.0 in 2011 19 4.9
Redesdale 3.3 3.5 in 2006 18 5.2
Shepparton Airport 4.1 = 4.1 in 2005 15 5.4
Mount Baw Baw 0.0 0.1 in 2011 14 1.7
Orbost 7.7 8.0 in 2010 11 8.4

Lowest May mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for May 2012 (C)
Most recent May
at least this cool
Years since
cooler
Average for
May
Gabo Island Lighthouse 10.2 9.8 in 1957* 53 11.2
Kyabram 4.4 3.8 in 1991 21 6.1
Mallacoota 8.6 =8.6 in 2000 12 9.3

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported.




Summary statistics for May 2012
Maximum temperatures
for May
(C)
Minimum temperatures
for May
(C)
Rainfall
for May
(millimetres)
Mean for
May
2012
Diff
from
average
Highest for
May
2012
Mean for
May
2012
Diff
from
average
Lowest for
May
2012
Total for
May
2012
Average
for
May
Rank of
May
2012
Fraction of
May
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 16.4 -1.3 21.4 10th 3.8 -1.6 -0.4 14th 38.0 47.8 average 79%
Hume Reservoir 16.3 -0.4 20.8 8th 5.4 -1.6 0.4 14th 39.4 58.5 average 67%
North Mallee (district 76)
Mildura Airport 19.8 +0.8 27.7 8th 5.5 -1.9 1.5 16th 2.4 25.1 v low 10%
Ouyen (Post Office) 19.7 +0.9 28.2 8th 5.6 -1.6 0.5 21st 6.2 31.6 low 20%
Walpeup Research 19.3 +1.0 27.9 8th 6.5 -1.2 2.0 3rd 6.8 30.7 low 22%
South Mallee (district 77)
Hopetoun Airport 18.9   27.3 1st 4.4   -2.5 21st 20.8
Swan Hill Aerodrome 19.2 +0.5 26.9 8th 4.7 -1.4 -1.5 21st 22.4 25.4 average 88%
North Wimmera (district 78)
Nhill Aerodrome 18.2   26.0 8th 5.8   -0.9 20th 11.6
Warracknabeal Museum 18.4 +0.5 26.3 1st 5.4 -1.1 -2.0 21st 12.0 39.4 low 30%
South Wimmera (district 79)
Edenhope Airport 16.6   24.6 8th 6.7   1.0 21st 24.0
Grampians (Mount William) 7.6   14.8 8th 2.7   -0.2 26th 88.0
Horsham Aerodrome 17.7 +0.1 25.4 8th 4.6 -0.4 -3.5 21st 31.6 31.3 average 101%
Kanagulk 16.7   23.9 8th 5.9   -0.9 21st 15.4
Longerenong 17.9 +0.8 25.7 1st 4.7 -1.2 -3.5 21st 41.2 42.8 average 96%
Pyrenees (Ben Nevis) 10.4   17.8 1st 4.6   2.2 3rd 67.0
Stawell Aerodrome 16.2 -0.2 23.8 1st 6.4 +0.4 -0.5 21st 23.8 35.3 average 67%
Lower North (district 80)
Charlton 18.3   25.4 8th 4.8   -2.1 21st 20.4
Echuca Aerodrome 17.9 +0.3 24.0 1st 4.9 -1.7 -1.5 21st 9.6 40.6 low 24%
Kerang 18.5 +0.5 25.6 8th 5.8 -0.9 -0.1 21st 13.0 36.0 low 36%
Kyabram 17.3 +0.1 23.1 1st 4.4 -1.7 -1.0 21st 16.2 41.9 low 39%
Upper North (district 81)
Bendigo Airport 16.5 -0.1 22.6 1st 3.6 -1.6 -2.2 21st 24.2 45.6 low 53%
Shepparton Airport 16.5 -1.2 22.2 1st 4.1 -1.3 -1.3 21st 19.4 31.0 average 63%
Tatura Inst Sustainable Ag 16.5 -0.7 22.0 1st 3.9 -1.8 -2.1 21st 23.2 44.7 average 52%
Yarrawonga 17.1 -1.1 22.9 1st 4.5 -1.5 0.1 20th 16.0 31.1 average 51%
Lower Northeast (district 82)
Benalla Airport 16.5   21.9 1st 3.3   -2.3 21st 31.8
Corryong Airport 14.2   20.2 10th 1.3   -2.1 14th 61.2
Dartmouth Reservoir 14.5 -1.5 20.5 10th 3.1 -1.6 0.0 12th 64.2 85.4 average 75%
Hunters Hill 11.0 -0.9 16.8 10th 4.4 -1.1 0.0 14th 66.6 84.2 average 79%
Rutherglen Research 16.6 -0.4 22.1 10th 1.6 -2.7 -3.7 21st 31.4 51.1 average 61%
Strathbogie 13.1 -1.4 17.4 1st 2.6 -1.0 -3.4 21st 40.8 95.8 low 43%
Wangaratta Aero 16.5 -1.0 21.4 1st 1.9 -2.3 -2.1 21st 29.4 57.7 average 51%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 9.7 -1.1 14.7 9th 0.0 -0.8 -5.9 31st 50.2 36.2 average 139%
Edi Upper 15.2 -1.4 19.8 10th 4.0 -2.0 0.5 14th 58.4 91.6 average 64%
Falls Creek 4.6 -1.6 10.2 30th -0.6 -1.2 -4.4 14th 62.6 88.1 average 71%
Mount Buller 4.7 -1.6 9.7 30th -0.6 -1.7 -4.4 3rd 107.6 131.1 average 82%
Mount Hotham 3.1 -1.6 7.7 29th -1.5 -1.4 -5.1 14th 83.4 118.2 average 71%
Omeo 13.2   19.3 10th 2.1   -3.5 12th 52.4
East Gippsland (district 84)
Combienbar AWS 14.0 -0.1 21.7 9th 6.7 -0.9 3.3 26th 61.6 68.8 average 90%
Gabo Island Lighthouse 16.9 0.0 22.6 9th 10.2 -1.0 7.5 26th 52.8 99.7 average 53%
Gelantipy 12.2 -0.6 20.8 9th 4.0 -0.9 -0.2 29th 46.8 51.1 average 92%
Lakes Entrance (Eastern Beach Road) 17.6   26.3 9th 8.4   4.0 22nd 68.9
Mallacoota 17.0 -0.4 21.4 11th 8.6 -0.7 3.9 22nd 53.2 85.0 average 63%
Mount Nowa Nowa 15.2 -0.5 22.2 9th 7.9 -0.7 4.7 26th 62.2 64.3 average 97%
Orbost 17.5 0.0 24.6 9th 7.7 -0.7 3.3 21st 48.8 57.5 average 85%
Point Hicks (Lighthouse) 16.8 -0.2 23.9 9th 10.3 -0.8 6.0 14th 68.9 96.1 average 72%
West Gippsland (district 85)
Bairnsdale Airport 17.5 0.0 24.3 9th 6.3 -0.4 -0.1 21st 74.0 47.3 high 156%
East Sale Airport 16.6 -0.2 23.0 9th 5.6 -0.7 -0.5 22nd 62.2 51.8 high 120%
Morwell (Latrobe Valley Airport) 16.0 -0.8 23.2 9th 5.9 -0.7 0.4 22nd 96.8 53.7 v high 180%
Mount Baw Baw 4.5 -2.1 10.3 30th 0.0 -1.7 -3.3 3rd 207.6 117.9 high 176%
Mount Moornapa 14.5 -0.1 24.0 9th 7.2 -0.6 3.1 3rd 83.4 50.8 high 164%
Pound Creek 16.0   22.6 1st 8.8   2.6 21st 177.6
Willow Grove (Blue Rock Reservoir) 15.6 -0.5 22.0 9th 7.1 -0.4 3.8 22nd 67.2 52.7 high 128%
Wilsons Promontory Lighthouse 15.2 +0.3 22.1 8th 11.4 +0.3 7.9 26th 148.8 112.9 high 132%
Yarram Airport 16.7   23.9 9th 6.6   1.7 21st 89.4
East Central (district 86)
Bundoora (Latrobe University) 16.0 -0.6 21.8 1st 8.7 +0.8 1.1 21st 86.4 52.2 high 166%
Cerberus 15.8 -0.7 22.4 1st 9.0 +0.7 3.9 31st 165.0 68.8 highest 240%
Coldstream 15.7 -0.7 22.6 1st 6.0 +0.6 -1.1 21st 87.0 64.9 high 134%
Coldstream Comparison 15.6   22.6 1st 5.9   -1.2 21st 87.0
Cranbourne Botanic Gardens 15.6 -0.7 22.0 1st 8.6 +0.2 3.6 21st 114.0 64.1 high 178%
Essendon Airport 16.0 -0.1 22.5 1st 8.4 +0.7 3.7 21st 70.8 49.4 high 143%
Ferny Creek 11.8   17.2 8th 7.0   3.9 26th 151.0
Frankston AWS 15.5 -0.4 20.9 1st 10.6 +0.1 6.1 21st
Melbourne Airport 15.7 -0.9 22.3 1st 7.7 -0.6 3.8 21st 53.0 40.4 high 131%
Melbourne Regional Office 17.0 +0.3 22.6 1st 10.0 +1.4 4.6 21st 80.0 56.0 high 143%
Moorabbin Airport 16.2 -0.7 22.6 9th 9.2 +0.6 3.3 31st 93.2 70.6 high 132%
Phillip Island Penguin Reserve 16.3 -0.4 21.6 9th 10.4 +1.5 4.0 31st 150.2 70.4 highest 213%
Rhyll 15.8 -0.4 21.1 1st 10.7 0.0 7.8 21st 177.6 72.7 highest 244%
Scoresby Research Institute 15.7 -0.5 21.4 1st 8.3 +0.1 3.3 21st 102.8 88.7 average 116%
Viewbank 16.1 -1.0 22.8 1st 8.2 +0.5 1.1 21st 74.4 53.1 high 140%
Wallan (Kilmore Gap) 11.9 -0.8 17.6 1st 6.0 -0.8 3.5 21st 58.6 59.1 average 99%
Wonthaggi 15.9 -0.8 22.2 9th 9.3 +0.7 5.9 21st 215.8 98.1 v high 220%
West Central (district 87)
Avalon Airport 17.2 +0.2 24.3 9th 7.6 +0.1 2.7 21st 68.6 35.7 v high 192%
Breakwater (Geelong Racecourse) 17.0   24.2 1st 8.8   4.3 21st 83.2
Laverton RAAF 16.6 -0.2 23.7 9th 7.7 -0.1 2.4 21st 67.4 46.8 high 144%
Sheoaks 14.9 -0.5 21.8 9th 7.2 0.0 1.1 20th 56.4 32.9 high 171%
North Central (district 88)
Castlemaine Prison 15.1 -0.6 21.2 1st 4.1 -1.2 -1.4 20th 42.8 57.0 average 75%
Eildon Fire Tower 11.9 -1.4 17.4 1st 5.6 -1.0 2.2 26th 45.6 56.2 average 81%
Lake Eildon 15.3 -0.8 21.1 1st 4.9 -1.0 0.0 20th 71.4 78.7 average 91%
Mangalore Airport 16.1 -0.6 21.5 1st 4.3 -1.8 -2.3 21st 31.8 54.6 average 58%
Maryborough 16.5 +0.3 23.3 9th 4.9 -1.2 -1.3 21st 53.0 49.3 average 108%
Redesdale 16.0 0.0 21.2 1st 3.3 -1.9 -2.0 21st 32.2 56.0 average 58%
Western Plains (district 89)
Ararat Prison 15.7 +0.3 23.0 1st 5.8 +0.4 -2.8 21st 29.9 52.1 low 57%
Ballarat Aerodrome 13.6 0.0 19.8 9th 4.6 -1.1 -2.5 21st 51.4 64.7 average 79%
Westmere 15.5   23.3 1st 6.7   0.4 21st 56.4
West Coast (district 90)
Aireys Inlet 16.1 0.0 22.9 1st 9.5 -0.3 6.4 12th 115.0 51.0 highest 225%
Cape Nelson Lighthouse 15.9 -0.1 22.4 8th 10.7 -0.1 6.4 17th 76.8 65.9 high 117%
Cape Otway Lighthouse 15.4 -0.2 22.3 1st 10.8 +0.8 8.0 21st 83.6 90.4 average 92%
Casterton 15.7   23.0 8th 6.7   2.3 6th 52.6
Colac (Mount Gellibrand) 14.6 -0.4 21.8 1st 7.4 -0.5 3.4 21st 47.0 37.2 high 126%
Dartmoor 15.8   22.3 8th 7.1   1.8 17th 99.0
Hamilton Airport 15.3 -0.4 21.9 8th 6.3 -0.2 1.7 21st 72.0 49.2 high 146%
Mortlake Racecourse 16.1 0.0 23.5 1st 6.6 +0.1 1.8 21st 55.8 48.4 average 115%
Port Fairy AWS 16.8 +0.1 22.7 8th 10.0 +1.0 4.5 16th 80.6 62.2 high 130%
Portland (Cashmore Airport) 15.7 -0.1 21.4 8th 8.8 +0.5 4.2 17th 105.2 77.7 high 135%
Portland NTC AWS 15.8   21.1 8th 10.6   6.4 17th
Warrnambool Airport NDB 16.1 -0.4 21.8 8th 7.9 +0.7 2.5 16th 88.8 65.5 high 136%

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 June 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.

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