Victoria in May 2016: warm nights, rainfall above average

Rainfall was average to above average across Victoria in May. The May statewide mean temperature was the fourth warmest on record for Victoria.

  • 4th warmest May on record
  • 4th warmest mean minimum temperature on record
  • Cool end of the month
  • Statewide rainfall 32.5% above the long-term average
  • Strongest wind gusts of 131 km/h at Wilsons Promontory

There were a number of days with widespread rainfall associated with the passage of cold fronts in Victoria in May. This resulted in statewide rainfall 32.5% above the long-term mean, the highest May rainfall since 1995. Above average rainfall was recorded in most of the State, while rainfall was near-average in some central parts and in the east, and locally below average in parts of central and east Gippsland. Particularly high daily rainfall totals were recorded on the 9th and 10th when a number of sites, mostly in central and northeast Victoria on the north side of the Great Dividing Range had their highest daily rainfall for May. The highest daily total of 125 mm was at Falls Creek (Rocky Valley) on the 10th, while the highest registered total for the month was 424 mm at Mount Hotham.

Victoria had its fourth warmest May on record, with a statewide mean temperature anomaly of 1.57 °C above the long-term average.

Mean maximum temperatures were generally above to very much above average across the State, with near-average temperatures recorded only around Wodonga. Although the month finished with cooler daytime temperatures, they were above average for most of the month. Some days were unusually warm resulting in a number of sites having their highest May temperature on record. This occured particularly on the 6th, 7th and 15th, in the northerly wind flow preceding approaching cold fronts. The highest daily maximum temperature in Victoria during the month, 28.4 °C, was recorded at Mildura Airport on the 6th.

Victorian mean minimum temperatures were mostly very much above average. The statewide mean minimum temperature was the fourth highest on record for May. The mean temperature anomaly of 1.96 °C above the long-term average, was the highest since 2007. The warmest night during the month saw 17.2 °C at Wilsons Promontory on the 15th. However, there were some cold nights, particularly at the end of the month, when a cold front brought a sharp decrease in temperatures across the State. The coldest night during May, -5.6 °C, was recorded at Mount Buller on the 28th.

There were several days with very strong winds, notably at the beginning and mid-month associated with a passage of cold fronts. The strongest wind gusts during May, 131 km/h, were recorded at Wilsons Promontory several times between the 10th and 13th.

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Extremes in May 2016
Hottest day 28.4 °C at Mildura Airport on the 6th
Warmest days on average 20.5 °C at Mildura Airport
Coolest days on average 4.3 °C at Mount Hotham
Coldest day -1.4 °C at Mount Hotham on the 27th
Coldest night -5.6 °C at Mount Buller on the 28th
Coolest nights on average 0.0 °C at Mount Hotham
Warmest nights on average 12.4 °C at Wilsons Promontory Lighthouse
Warmest night 17.2 °C at Wilsons Promontory Lighthouse on the 15th
Warmest on average overall 15.2 °C at Gabo Island Lighthouse
Coolest on average overall 2.2 °C at Mount Hotham
Wettest overall 424.0 mm at Mount Hotham
Wettest day 125.0 mm at Falls Creek (Rocky Valley) on the 10th
Strongest wind gust 131 km/h at Wilsons Promontory Lighthouse on the 10th
131 km/h at Wilsons Promontory Lighthouse on the 12th
131 km/h at Wilsons Promontory Lighthouse on the 13th

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest May daily rainfall
New record
(mm)
Old
record
Years of
record
Lake Buffalo 68.4 on the 9th 58.0 on the 15th in 1992 46
Falls Creek 79.0 on the 10th 66.0 on the 31st in 1999 23
Hunters Hill 80.2 on the 9th 58.0 on the 4th in 2000 22
Mount Hotham 114.2 on the 10th 92.8 on the 28th in 2014 22
Stawell Aerodrome 36.8 on the 9th 35.2 on the 17th in 2008 21
Lima East (Charnwood) 94.4 on the 9th 57.6 on the 28th in 2014 20



Record highest May total rainfall
New record
(mm)
Old
record
Years of
record
Average for
May
Barnawartha 160.8 152.4 in 1968 111 48.8
Mount Buller 330.6 279.3 in 1989 35 141.4
Edi Upper 207.6 200.6 in 1992 30 94.4
Yarrawonga 126.4 85.8 in 1995 24 35.5
Hunters Hill 262.6 261.6 in 2000 22 97.0
Mount Hotham 424.0 371.2 in 1995 22 145.2
Stawell Aerodrome 110.0 95.6 in 2007 21 37.7
Lima East (Charnwood) 232.0 213.4 in 1995 20 86.9
Shepparton Airport 81.2 64.4 in 1999 20 33.9

Highest May total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
May
Apollo Bay 180.0 244.3 in 1968 98.5
Eurobin 253.6 309.4 in 1968 108.5
Rochester 103.5 119.2 in 1974 43.3
Whitlands (Burder's Lane) 300.4 319.0 in 1974 136.5
Princetown 156.3 174.6 in 1971* 90.4
Kyabram 94.4 95.6 in 1983 42.5
Cavendish (Post Office) 90.6 134.0 in 1987 59.5
Derrinallum (Post Office) 102.4 120.2 in 1987 59.3
Hamilton Airport 103.0 118.4 in 1987 51.9
Penshurst (Post Office) 113.0 138.8 in 1987 70.0
Ararat Prison 113.2 144.5 in 1988 52.9
Balmoral (Post Office) 106.2 113.6 in 1988 60.6
Canary Island 66.6 97.0 in 1988 35.0
Echuca Aerodrome 84.0 89.5 in 1988 40.6
Rutherglen Research 112.2 172.8 in 1988 51.7
St Arnaud 108.2 145.0 in 1988 51.8
Charlton (Donald St) 85.4 87.0 in 1989 41.5
Yackandandah 227.0 233.8 in 1988* 89.6
Burrowye Station 149.7 165.0 in 1988* 70.8
Dederang 210.8 216.0 in 1988* 89.4
Drung Drung 80.4 82.8 in 1992 43.4
Korong Vale (Burnbank) 81.4 96.0 in 1989* 43.0
Longerenong 62.6 77.0 in 1992 42.5
Wangaratta Aero 110.2 119.5 in 1992 58.2
Wedderburn (Post Office) 84.5 85.4 in 1992 47.9
Cressy 71.4 79.8 in 1988* 46.1
Annuello 52.6 70.6 in 1995 29.4
Berriwillock 68.6 91.4 in 1995 34.1
Birchip (Woodlands) 61.2 108.4 in 1995 34.6
Donald 70.0 73.8 in 1995 38.1
Eldorado 129.2 146.0 in 1995 59.2
Mincha 69.0 86.0 in 1995 34.4
Murrayville 57.2 70.0 in 1995 31.9
Raywood 79.2 80.0 in 1995 42.8
Stanhope 76.8 89.4 in 1995 40.9
Tatura Inst Sustainable Ag 88.6 103.6 in 1995 44.7
Beazleys Bridge 72.0 79.3 in 1995* 50.5
Manangatang (Eureka East) 52.8 93.0 in 1995* 32.4

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




Record highest May temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Gabo Island Lighthouse 26.6 on the 15th 26.1 on the 19th in 1923 106 16.9
Wonthaggi 26.1 on the 7th 25.7 on the 8th in 2002 47 16.7
Cranbourne Botanic Gardens 26.5 on the 7th 25.4 on the 9th in 2013 27 16.4
Aireys Inlet 27.8 on the 7th 27.3 on the 9th in 2013 25 16.3
Mallacoota 26.5 on the 15th 25.7 on the 4th in 2010 23 17.5
Mount Moornapa 25.4 on the 6th 24.0 on the 9th in 2012 23 14.8



Record lowest May daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Mallacoota 10.9 on the 27th 11.1 on the 19th in 2002 23 17.5



Record highest May mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Mount Moornapa 17.8 = 17.8 in 2007 22 14.8



Record highest May daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
East Sale Airport 15.5 on the 13th = 15.5 on the 15th in 1974 71 6.3
Morwell (Latrobe Valley Airport) 14.6 on the 13th 14.4 on the 24th in 1987 33 6.5
Falls Creek 7.8 on the 9th = 7.8 on the 12th in 2007 25 0.6
Mount Hotham 7.1 on the 9th 7.0 on the 6th in 1996 25 -0.1



Record lowest May temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Willow Grove (Blue Rock Reservoir) 1.5 on the 23rd 1.7 on the 18th in 2000 28 7.5



Summary statistics for May 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2016
Diff
from
average
Highest for
May
2016
Mean for
May
2016
Diff
from
average
Lowest for
May
2016
Total for
May
2016
Average
for
May
Rank of
May
2016
Fraction of
May
average
North Mallee (district 76)
Mildura Airport 20.5 +1.4 28.4 6th 9.3 +1.9 4.3 29th 43.4 25.2 high 172%
Ouyen (Post Office) 20.3 +1.4 28.2 6th 9.5 +2.3 3.7 29th 48.9 31.6 high 155%
Walpeup Research 20.0 +1.6 27.9 6th 9.9 +2.1 4.2 29th 45.0 30.5 high 148%
South Mallee (district 77)
Hopetoun Airport 19.5 +0.6 27.7 6th 8.8 +2.8 2.6 29th 51.6 27.3 high 189%
Swan Hill Aerodrome 19.2 +0.4 26.5 6th 8.9 +2.7 2.1 31st 48.8 25.1 high 194%
North Wimmera (district 78)
Nhill Aerodrome 18.2 +0.2 25.3 22nd 9.4 +2.9 3.4 29th 41.0 26.6 high 154%
Warracknabeal Museum 18.5 +0.6 26.5 7th 9.3 +2.8 3.5 29th 65.5 39.6 high 165%
South Wimmera (district 79)
Edenhope Airport 16.9 0.0 21.8 22nd 9.2 +2.1 3.7 16th 72.8 41.5 v high 175%
Grampians (Mount William) 8.8 +0.3 17.2 7th 4.2 +0.4 -1.0 30th 97.0 126.3 low 77%
Horsham Aerodrome 17.9 +0.2 26.4 7th 7.9 +2.8 0.8 30th 60.4 31.8 v high 190%
Kanagulk 16.9 +0.3 22.7 7th 8.7 +2.3 2.6 30th 83.0 38.2 v high 217%
Longerenong 18.0 +0.9 26.2 7th 8.2 +2.3 1.9 27th 62.6 42.5 high 147%
Pyrenees (Ben Nevis) 11.6   20.2 7th 6.1   1.6 30th 119.0
Stawell Aerodrome 16.5 +0.1 24.1 7th 8.5 +2.3 -0.1 30th 110.0 37.7 highest 292%
Lower North (district 80)
Charlton 18.3 +0.2 26.9 6th 9.0 +2.8 1.5 30th 77.0 29.5 v high 261%
Echuca Aerodrome 18.6 +1.0 26.0 6th 8.8 +2.2 0.9 31st 84.0 40.6 v high 207%
Kerang 19.2 +1.1 26.1 6th 9.1 +2.4 1.8 31st 62.8 35.9 high 175%
Kyabram 18.2 +0.9 25.4 7th 8.4 +2.3 1.1 31st 94.4 42.5 v high 222%
Upper North (district 81)
Bendigo Airport 17.0 +0.4 23.6 6th 7.6 +2.4 1.2 30th 83.0 46.5 high 178%
Shepparton Airport 17.7 +0.1 24.6 7th 8.1 +2.6 0.0 31st 81.2 33.9 highest 240%
Tatura Inst Sustainable Ag 17.8 +0.6 24.6 7th 7.9 +2.2 -0.6 31st 88.6 44.7 v high 198%
Yarrawonga 18.2 +0.1 25.4 6th 9.1 +3.1 1.2 31st 126.4 35.5 highest 356%
Lower Northeast (district 82)
Benalla Airport 17.4   24.1 7th 7.6   -0.4 30th 113.6 50.1 v high 227%
Corryong Airport 17.1 +1.2 23.5 7th 6.3 +3.4 -0.5 29th 121.6 52.5 v high 232%
Dartmouth Reservoir 16.3 +0.4 22.4 6th 6.4 +1.7 -0.4 29th 178.4 86.9 v high 205%
Hunters Hill 11.7 -0.1 18.7 7th 5.8 +0.3 1.0 29th 262.6 97.0 highest 271%
Rutherglen Research 17.8 +0.8 25.1 6th 7.5 +3.2 -0.2 31st 112.2 51.7 v high 217%
Strathbogie 14.2 -0.3 21.0 7th 5.6 +2.0 -3.5 30th 130.4 95.6 high 136%
Wangaratta Aero 17.5 +0.1 24.2 7th 7.9 +3.7 0.4 31st 110.2 58.2 high 189%
Upper Northeast (district 83)
Falls Creek 5.5 -0.6 12.9 21st 0.8 +0.2 -4.8 30th 262.8 100.7 v high 261%
Mount Buller 5.5 -0.7 12.7 21st 0.6 -0.5 -5.6 28th 330.6 141.4 highest 234%
Mount Hotham 4.3 -0.3 12.2 21st 0.0 +0.1 -5.5 28th 424.0 145.2 highest 292%
Omeo 15.4 +1.0 21.2 7th 3.9 +1.2 -5.3 28th 41.8 30.2 average 138%
East Gippsland (district 84)
Combienbar AWS 16.5 +2.2 24.8 7th 8.7 +1.0 3.8 30th 32.2 62.6 average 51%
Gabo Island Lighthouse 18.4 +1.5 26.6 15th 12.0 +0.8 9.2 28th 77.6 98.3 average 79%
Gelantipy 14.7 +1.8 20.5 6th 6.2 +1.3 -0.1 28th 43.8 47.0 average 93%
Lakes Entrance (Eastern Beach Road) 19.9   27.7 6th 9.6   3.7 2nd 67.8 41.5 average 163%
Mallacoota 19.3 +1.8 26.5 15th 9.7 +0.4 3.7 3rd 80.6 82.0 average 98%
Mount Nowa Nowa 17.7 +1.9 24.9 7th 9.7 +1.0 3.4 28th 57.4 58.2 average 99%
Orbost 19.3 +1.6 26.0 6th 9.4 +1.0 5.1 2nd 49.4 51.9 average 95%
Point Hicks (Lighthouse) 18.3 +1.3 25.7 6th 11.5 +0.5 7.4 2nd 100.8 94.4 average 107%
West Gippsland (district 85)
Bairnsdale Airport 19.4 +1.9 26.4 6th 7.6 +0.9 1.6 25th 48.2 45.2 high 107%
Corner Inlet (Yanakie) 17.5   23.2 6th 9.9   3.9 30th 128.0
East Sale Airport 18.8 +2.0 26.5 6th 7.0 +0.7 1.6 25th 37.8 50.7 average 75%
Morwell (Latrobe Valley Airport) 18.1 +1.3 26.2 6th 7.2 +0.7 -0.4 30th 65.4 54.1 high 121%
Mount Baw Baw 6.2 -0.2 14.3 7th 1.5 -0.1 -4.4 30th 112.6 121.8 average 92%
Mount Moornapa 17.8 +3.0 25.4 6th 9.2 +1.3 4.5 28th 36.6 46.1 average 79%
Pound Creek 17.8   25.8 7th 10.0   3.5 22nd 146.8 88.0 v high 167%
Wilsons Promontory Lighthouse 16.5 +1.5 23.3 22nd 12.4 +1.3 9.6 11th 194.6 113.5 v high 171%
Yarram Airport 18.0   25.7 6th 7.7   1.8 30th 68.2
East Central (district 86)
Bundoora (Latrobe University) 18.3 +1.6 25.8 7th 9.7 +1.7 0.2 31st 52.2 51.7 average 101%
Cerberus 17.7 +1.1 25.4 7th 10.2 +1.8 0.9 31st 110.2 69.3 high 159%
Coldstream 18.1 +1.5 25.5 7th 7.4 +1.9 -2.3 31st 102.4 67.4 high 152%
Essendon Airport 18.3 +2.1 25.6 7th 10.4 +2.6 1.1 31st 47.4 48.7 average 97%
Ferny Creek 14.0   21.0 6th 8.6   4.5 4th 143.4
Frankston AWS 17.4 +1.4 22.6 7th 11.8 +1.3 4.3 31st
Melbourne (Olympic Park) 18.6   25.7 7th 11.4   3.6 31st 57.0
Melbourne Airport 18.1 +1.5 25.5 7th 9.7 +1.4 1.0 31st 45.8 39.4 average 116%
Moorabbin Airport 18.5 +1.5 26.0 7th 10.7 +2.0 1.9 31st 78.2 69.5 average 113%
Rhyll 17.3 +1.1 22.8 7th 11.9 +1.2 7.6 11th 112.6 73.7 v high 153%
Scoresby Research Institute 18.0 +1.7 25.0 7th 9.7 +1.5 0.7 31st 86.0 87.8 average 98%
Viewbank 18.4 +1.3 26.4 7th 9.9 +2.1 0.5 31st 53.4 52.0 average 103%
Wonthaggi 17.9 +1.2 26.1 7th 10.7 +2.0 6.1 21st 149.4 98.4 high 152%
West Central (district 87)
Avalon Airport 18.9 +1.7 27.9 7th 9.5 +2.0 -0.2 31st 59.0 35.6 high 166%
Breakwater (Geelong Racecourse) 18.1   26.4 7th 9.9   1.1 31st 77.8
Laverton RAAF 18.6 +1.7 26.6 7th 10.1 +2.3 0.3 31st 55.2 46.1 average 120%
Sheoaks 17.1 +1.5 25.4 7th 9.2 +1.9 -0.1 31st 51.8 32.9 high 157%
North Central (district 88)
Castlemaine Prison 16.2 +0.5 22.8 6th 8.1 +2.8 0.0 31st 86.6 56.3 high 154%
Eildon Fire Tower 13.4 +0.1 21.6 7th 7.3 +0.7 1.5 30th 74.0 55.9 high 132%
Lake Eildon 16.9 +0.8 24.7 7th 7.8 +1.9 0.9 28th 95.8 78.4 average 122%
Mangalore Airport 17.6 +0.9 24.5 7th 7.5 +1.5 0.3 29th 50.0 53.4 average 94%
Maryborough 17.1 +0.9 25.2 6th 7.5 +1.4 -0.1 31st 70.4 49.1 high 143%
Redesdale 16.1 0.0 22.0 7th 7.2 +2.1 -0.4 31st 72.8 55.8 high 130%
Wallan (Kilmore Gap) 13.9 +1.1 20.2 7th 7.6 +0.8 3.6 28th 67.6 56.1 high 120%
Western Plains (district 89)
Ararat Prison 16.7 +1.3 25.0 7th 8.1 +2.6 0.4 30th 113.2 52.9 v high 214%
Ballarat Aerodrome 14.9 +1.3 23.1 6th 7.1 +1.4 -1.5 31st 71.4 64.0 average 112%
Westmere 16.4 +0.7 25.1 7th 8.7 +2.4 -0.4 31st 98.8 49.5 v high 200%
West Coast (district 90)
Aireys Inlet 17.4 +1.1 27.8 7th 10.2 +0.3 5.4 31st 69.6 50.7 high 137%
Cape Nelson Lighthouse 16.8 +0.7 21.7 14th 11.7 +0.9 6.3 30th 89.8 72.4 average 124%
Cape Otway Lighthouse 16.4 +0.8 21.1 7th 11.4 +1.4 7.4 31st 124.8 91.1 high 137%
Casterton 16.5 +0.2 21.2 5th 9.2 +2.0 2.8 30th 114.0 65.9 high 173%
Colac (Mount Gellibrand) 15.8 +0.7 25.8 7th 8.8 +0.9 5.0 31st 74.2 40.9 v high 181%
Dartmoor 16.6   21.3 5th 8.7   0.8 30th 100.4
Hamilton Airport 15.7 0.0 20.6 7th 8.4 +1.8 1.4 30th 103.0 51.9 v high 198%
Mortlake Racecourse 16.7 +0.5 21.7 7th 8.3 +1.7 1.2 31st 108.4 51.6 v high 210%
Port Fairy AWS 17.2 +0.4 22.0 14th 9.9 +0.8 4.3 31st 88.2 68.9 high 128%
Portland (Cashmore Airport) 16.4 +0.5 21.1 14th 9.5 +1.1 0.4 30th 144.4 82.3 v high 175%
Warrnambool Airport NDB 16.8 +0.2 20.9 14th 8.8 +1.4 0.9 30th 140.4 71.3 high 197%

Notes

The Monthly climate summary lists 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.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 11 am on Wednesday 1 June 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages for individual sites 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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
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