Victoria in April 2016: Warm with below average rainfall

For most of Victoria, April rainfall was below to very much below average, with average rainfall recorded only in central areas north of Melbourne, parts of the West Coast and in a small area around Sale. April maximum temperatures were generally very much above average throughout the State. Minimum temperatures were above average, with very much above average minimum temperatures recorded only in parts of southern, central and eastern Victoria.

  • Daytime and overnight temperatures above average overall
  • Victoria's second-warmest April on record
  • Late-season high temperature records at a number of sites
  • Rainfall well below average for much of Victoria

For Victoria, the month was dominated by high pressure systems resulting in mostly dry conditions. April rainfall was 62% below average. Mallacoota had its lowest total April rainfall since 1981. Cold fronts on the 6th, 22nd and 29th brought some rain to southern and central parts of the State, with totals mostly in the 10-20 mm range and only locally higher falls. The highest registered total for the month was 126.8 mm Haines Junction/Mount Sabine, while the highest daily total of 55.6 mm was registered at Mount Hotham on the 30th.

Victoria recorded above average mean maximum temperatures in April; the statewide average maximum temperature was 2.30 °C above the long-term mean, the fourth-highest since records began in 1910 and the highest since 2005. Most sites had maximum temperatures between 1.5 and 2.5 °C above the April average. Warm northerly winds brought unseasonably high temperatures to the State on several days, and on the 20th Mildura Airport recorded 33.0 °C, the highest daily maximum temperature during the month. Several sites, particularly in the west of the State, recorded late-season high maximum temperature records on the 20th.

Minimum temperatures were generally average to above average, with very much above average minimum temperatures in the south and east of Victoria. The statewide average minimum temperature was 1.00 °C above the long-term mean. Some nights were particularly warm, for example on the 21st and 28th, when many late-season temperature records were set across the State. Both Cerberus and Wonthaggi recorded a minimum temperature of 21.1 °C on the 28th. The coldest night during April, −1.7 °C, was recorded at Falls Creek on the 23rd, in a wake of a cold front that brought a sharp decrease in temperatures across the State after it crossed on the 22nd.

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Extremes in April 2016
Hottest day 33.0 °C at Mildura Airport on the 20th
Warmest days on average 26.1 °C at Mildura Airport
Coolest days on average 10.9 °C at Mount Hotham
Coldest day 5.6 °C at Mount Baw Baw on the 22nd
Coldest night −1.7 °C at Falls Creek on the 23rd
Coolest nights on average 4.5 °C at Mount Hotham
Warmest nights on average 14.6 °C at Wilsons Promontory Lighthouse
Warmest night 21.1 °C at Cerberus on the 28th
21.1 °C at Wonthaggi on the 28th
Warmest on average overall 18.5 °C at Mildura Airport
Coolest on average overall 7.7 °C at Mount Hotham
Wettest overall 126.8 mm at Haines Junction (Mount Sabine)
Driest overall 0.8 mm at Hopetoun Airport
0.8 mm at Woomelang
Wettest day 55.6 mm at Mount Hotham on the 30th
Strongest wind gust 104 km/h at Wilsons Promontory Lighthouse on the 10th

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



Lowest April total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
April
Mallacoota 17.8 14.0 in 1981* 94.2

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




Record highest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Rhyll 21.3 21.2 in 2007 24 19.4
Hunters Hill 19.7 19.1 in 2002 23 16.3
Mallacoota 22.6 22.0 in 2005 23 19.9
Combienbar AWS 20.4 20.2 in 2005 21 17.5

Highest April mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
April
Gabo Island Lighthouse 21.4 21.7 in 1894* 19.2

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




Record highest April mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Wallan (Kilmore Gap) 10.9 10.7 in 2010 22 8.7



Record highest April mean temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Hunters Hill 15.1 14.9 in 2005 23 12.3



Summary statistics for April 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2016
Diff
from
average
Highest for
April
2016
Mean for
April
2016
Diff
from
average
Lowest for
April
2016
Total for
April
2016
Average
for
April
Rank of
April
2016
Fraction of
April
average
North Mallee (district 76)
Mildura Airport 26.1 +2.5 33.0 20th 10.9 +0.8 4.8 18th 3.0 19.3 low 16%
Ouyen (Post Office) 25.7 +2.3 32.1 5th 10.8 +1.3 4.5 23rd 3.0 21.7 low 14%
Walpeup Research 25.3 +2.5 32.2 20th 11.6 +1.5 4.0 23rd 2.6 23.0 low 11%
South Mallee (district 77)
Hopetoun Airport 25.1 +1.5 32.1 5th 9.7 +1.0 2.9 7th 0.8 19.7 v low 4%
Swan Hill Aerodrome 25.4 +1.7 30.6 20th 10.3 +1.4 4.6 7th 15.0 19.7 average 76%
North Wimmera (district 78)
Nhill Aerodrome 23.5 +0.9 30.9 20th 10.2 +1.3 4.5 7th 6.6 19.5 low 34%
Warracknabeal Museum 24.5 +2.1 30.6 5th 9.9 +1.0 3.5 7th 7.7 25.6 low 30%
South Wimmera (district 79)
Edenhope Airport 22.2 +1.1 31.0 20th 10.0 +1.2 2.5 18th 28.0 31.3 average 89%
Grampians (Mount William) 14.0 +1.9 21.2 5th 7.2 +1.4 2.3 17th 22.8 73.8 v low 31%
Horsham Aerodrome 23.4 +1.2 30.5 20th 8.3 +1.2 2.2 7th 7.6 25.5 v low 30%
Kanagulk 22.4 +1.3 30.5 20th 9.3 +0.9 1.5 18th 26.4 30.7 average 86%
Longerenong 23.5 +2.0 30.1 20th 8.8 +0.8 1.9 7th 7.4 28.7 low 26%
Pyrenees (Ben Nevis) 17.6   24.5 5th 9.4   4.6 7th 17.8
Stawell Aerodrome 21.7 +1.0 29.1 5th 10.3 +1.9 3.6 18th 11.4 28.2 low 40%
Lower North (district 80)
Charlton 24.6 +1.7 30.7 5th 10.4 +1.3 3.7 7th 6.6 21.0 low 31%
Echuca Aerodrome 25.5 +3.2 30.5 5th 10.7 +1.3 5.4 7th 23.5 32.1 average 73%
Kerang 25.3 +2.5 30.7 20th 11.1 +1.7 5.5 7th 23.0 25.6 average 90%
Kyabram 24.9 +3.2 29.9 5th 10.4 +1.7 4.8 7th 22.2 36.4 low 61%
Upper North (district 81)
Bendigo Airport 23.2 +2.0 28.7 5th 9.7 +1.9 3.9 23rd 14.8 29.8 average 50%
Shepparton Airport 24.6 +2.2 29.3 5th 10.1 +1.7 5.2 24th 21.6 33.7 average 64%
Tatura Inst Sustainable Ag 24.2 +2.7 29.4 5th 9.8 +1.5 4.3 7th 18.8 34.2 average 55%
Yarrawonga 25.5 +2.7 30.7 5th 10.2 +1.3 5.7 23rd 23.8 31.3 average 76%
Lower Northeast (district 82)
Benalla Airport 24.8   29.4 5th 8.4   3.2 9th 21.5 41.6 average 52%
Corryong Airport 25.2 +3.9 30.4 5th 5.9 +0.1 1.7 9th 14.2 48.1 v low 30%
Dartmouth Reservoir 23.3 +2.7 28.6 5th 7.7 +0.5 2.6 9th 14.4 59.3 low 24%
Hunters Hill 19.7 +3.4 24.5 5th 10.5 +2.2 5.0 23rd 19.6 67.7 low 29%
Rutherglen Research 25.5 +3.6 30.6 5th 7.2 +0.1 1.9 9th 9.8 40.2 low 24%
Strathbogie 21.2 +2.4 25.7 5th 7.0 +1.4 1.3 9th 41.2 65.5 average 63%
Wangaratta Aero 25.3 +2.9 30.4 5th 7.1 +0.2 3.0 9th 14.8 38.3 low 39%
Upper Northeast (district 83)
Falls Creek 12.0 +2.4 14.9 16th 5.0 +2.0 -1.7 23rd 54.6 85.6 low 64%
Mount Buller 12.2 +2.4 15.7 5th 5.5 +1.9 -0.8 7th 46.0 104.1 low 44%
Mount Hotham 10.9 +2.7 13.8 5th 4.5 +2.0 -1.2 23rd 91.6 103.8 average 88%
Omeo 21.1 +2.7 25.7 5th 5.6 +0.1 0.0 26th 11.4 37.4 v low 30%
East Gippsland (district 84)
Combienbar AWS 20.4 +2.9 27.3 5th 11.5 +1.9 6.8 23rd 23.0 91.9 low 25%
Gabo Island Lighthouse 21.4 +2.2 26.9 2nd 14.5 +1.0 11.7 4th 26.0 84.4 low 31%
Gelantipy 18.6 +2.3 24.9 5th 8.2 +1.2 3.4 24th 26.8 61.1 low 44%
Lakes Entrance (Eastern Beach Road) 22.8   29.8 5th 11.4   5.9 25th 24.2 69.9 v low 35%
Mallacoota 22.6 +2.7 28.4 15th 12.7 +1.0 8.7 25th 17.8 94.2 v low 19%
Mount Nowa Nowa 21.3 +2.3 29.4 5th 12.3 +1.6 7.9 7th 15.2 86.2 v low 18%
Orbost 22.9 +2.1 30.9 5th 11.1 +0.4 7.5 8th 23.8 83.7 v low 28%
Point Hicks (Lighthouse) 21.6 +1.8 30.1 5th 13.9 +0.8 10.7 25th 40.5 87.9 low 46%
West Gippsland (district 85)
Bairnsdale Airport 22.9 +2.3 29.9 5th 9.0 +0.3 4.4 25th 27.0 58.0 low 47%
Corner Inlet (Yanakie) 21.9   30.1 5th 11.5   4.9 25th 34.2
East Sale Airport 22.4 +2.1 28.1 5th 8.9 +0.3 3.4 27th 26.0 48.5 average 54%
Morwell (Latrobe Valley Airport) 22.4 +1.9 29.7 5th 8.8 +0.1 2.8 27th 31.4 57.7 low 54%
Mount Baw Baw 11.8 +2.2 15.4 4th 5.6 +2.0 0.0 3rd 69.2 142.9 v low 48%
Mount Moornapa 20.5 +2.4 27.9 5th 11.6 +1.8 8.0 7th 45.8 84.5 average 54%
Pound Creek 21.9   29.7 5th 10.9   2.6 4th 38.2 59.6 average 64%
Wilsons Promontory Lighthouse 20.1 +2.8 27.0 5th 14.6 +1.9 12.5 6th 35.0 84.0 low 42%
Yarram Airport 21.8   29.7 5th 8.9   3.1 24th 31.4
East Central (district 86)
Bundoora (Latrobe University) 22.6 +2.2 29.8 5th 11.1 +1.3 5.4 7th 50.9 54.6 average 93%
Cerberus 22.0 +2.3 29.3 5th 11.1 +1.2 4.5 4th 34.0 62.0 low 55%
Coldstream 22.6 +2.2 28.6 5th 8.1 +1.3 1.4 4th
Cranbourne Botanic Gardens 21.9 +2.1 28.8 5th 11.7 +1.5 7.5 25th 46.6 69.6 low 67%
Essendon Airport 22.6 +2.5 29.6 5th 12.4 +2.5 7.7 7th 40.6 54.2 average 75%
Ferny Creek 18.6   24.4 5th 11.6   5.9 7th 89.0
Frankston AWS 20.8 +1.6 26.4 19th 13.9 +1.6 9.3 24th
Melbourne (Olympic Park) 22.4   29.0 5th 13.0   8.3 7th 48.6
Melbourne Airport 22.7 +2.4 29.2 5th 11.9 +1.7 7.4 7th 34.4 43.3 average 79%
Moorabbin Airport 22.4 +2.3 29.5 5th 12.3 +1.9 7.0 4th 47.8 62.0 average 77%
Rhyll 21.3 +1.9 26.7 5th 14.0 +1.4 10.8 24th 37.0 58.3 average 63%
Scoresby Research Institute 22.3 +2.3 28.5 5th 11.8 +1.8 6.0 24th 66.8 67.4 average 99%
Viewbank 22.8 +1.6 29.4 5th 11.3 +1.3 5.6 4th 51.0 56.3 average 91%
Wonthaggi 21.6 +2.0 28.5 5th 12.2 +1.8 6.6 25th 50.6 78.4 average 65%
West Central (district 87)
Avalon Airport 22.6 +2.3 31.3 5th 10.9 +1.3 5.0 25th 22.6 36.8 low 61%
Breakwater (Geelong Racecourse) 22.5   31.7 5th 11.8   6.3 25th 23.4
Laverton RAAF 22.5 +2.3 30.4 5th 11.9 +2.0 6.1 7th 31.2 45.0 average 69%
Sheoaks 21.4 +2.3 29.3 5th 10.6 +1.9 3.8 4th 9.0 36.4 v low 25%
North Central (district 88)
Castlemaine Prison     25.5 15th 9.7 +2.1 2.4 7th 23.0 39.9 average 58%
Eildon Fire Tower 20.5 +2.3 25.6 5th 10.8 +1.7 5.9 7th 28.0 42.9 average 65%
Lake Eildon 23.5 +2.7 28.5 5th 8.8 +0.9 4.2 23rd 33.8 59.4 average 57%
Mangalore Airport 23.7 +2.3 28.9 5th 9.9 +1.3 3.1 25th 23.0 38.6 average 60%
Maryborough 22.7 +2.1 28.6 5th 9.6 +1.3 3.9 7th 11.2 39.0 low 29%
Redesdale 22.5 +2.0 28.6 5th 9.0 +1.7 3.3 7th 24.8 40.0 average 62%
Wallan (Kilmore Gap) 19.3 +2.4 25.7 5th 10.9 +2.2 6.5 3rd 46.2 54.9 average 84%
Western Plains (district 89)
Ararat Prison 21.9 +2.4 28.5 5th 9.4 +2.2 1.8 3rd 13.8 41.8 low 33%
Ballarat Aerodrome 20.1 +2.4 27.5 5th 8.9 +1.4 2.2 7th 13.8 50.8 v low 27%
Westmere 21.5 +1.6 29.3 5th 8.9 +1.4 2.9 18th 15.2 32.6 low 47%
West Coast (district 90)
Aireys Inlet 21.3 +2.3 29.4 5th 13.2 +1.6 8.9 7th 30.2 50.1 low 60%
Cape Nelson Lighthouse 20.2 +2.1 31.4 20th 13.0 +0.7 7.3 4th 24.4 44.9 low 54%
Cape Otway Lighthouse 19.5 +1.5 28.7 20th 13.3 +1.7 9.4 4th 45.8 70.9 low 65%
Casterton 21.3 +1.0 30.1 20th 9.8 +1.1 3.3 18th 35.4 42.2 average 84%
Colac (Mount Gellibrand) 20.8 +1.7 28.5 20th 11.5 +1.7 6.1 7th 18.0 38.9 low 46%
Dartmoor 21.2   30.6 20th 9.6   2.6 4th 34.0
Hamilton Airport 20.9 +1.1 29.4 20th 9.8 +1.6 3.5 18th 38.8 39.1 average 99%
Mortlake Racecourse 21.8 +1.9 30.0 20th 9.4 +1.6 3.1 18th 37.6 42.2 average 89%
Port Fairy AWS 20.8 +1.5 30.7 20th 11.6 +0.8 6.6 4th 25.0 50.6 low 49%
Portland (Cashmore Airport) 20.0 +1.6 29.4 20th 10.3 +0.5 3.3 4th 41.6 58.2 average 71%
Warrnambool Airport NDB 21.2 +1.3 31.3 20th 10.1 +1.3 3.2 4th 37.0 52.2 average 71%

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 Monday 2 May 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

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