Victoria in January 2018: much warmer than average

January rainfall was below average for Victoria as a whole, but heavy rain at times during the last week of the month resulted in average to above average totals in some central, northern and eastern districts. January temperatures were warmer than average in all areas of Victoria, with much of the State recording temperatures that were very much above average. Overall, it was Victoria's fourth-warmest January on record.

Below average rainfall

  • January rainfall was 16% below average for Victoria as a whole
  • Rainfall was below average in western districts
  • Heavy rainfall during the last week of the month resulted in above average January totals in some central and northern districts, and parts of East Gippsland
  • Very much below average rainfall for the month in isolated patches of the West Coast
  • On the 28th, Wangaratta Aero had its highest January daily rainfall on record. Most of the rain fell in an hour with the intensity for 30 minutes to 3 hours having an annual exceedance probability of less than 1% (less frequent than a 1-in-100 year event at those durations)
  • Several sites had their highest total January rainfall since 1995 or 1996

Fourth-warmest January on record

  • Victoria's overall fourth-warmest January on record and warmest since 2006
  • Averaged across Victoria, the mean maximum temperature was 3.17 °C warmer than average, the highest January daytime temperature for the State since 2001
  • Very much above average daytime temperatures across western Victoria
  • Mean maximum temperatures were more than 4 °C above average around Swan Hill in the Mallee
  • The temperature reached 45 °C or more at sites in Victoria on four separate days during January, the first month that has happened since January 2009, and the second-highest count of such hot days behind January 1939 (seven days)
  • Numerous sites across northern Victoria had record counts of days of 35 °C or more for January, including Bendigo Airport (15 days), Walpeup Research (19 days), and Kyabram (17 days)
  • There were also many sites with new records for long runs of consecutive days of 35 °C or more, including Bendigo Airport with a run of 12 consecutive days (previous record run was eight such hot days in 2014), and Mildura Airport with a run of 14 days (previous record run was 12 days in 1961)
  • Nights were warmer than average throughout Victoria in January, with the overall mean minimum temperature being Victoria's sixth-warmest on record and highest since 2006
  • Night time temperatures were very much above average across eastern Victoria, including patches of highest on record in Gippsland
  • Temperatures didn't drop below 30 °C at Mildura Airport, Ouyen, and Walpeup Research in the northwest on the morning of the 29th
  • Mildura Airport's minimum temperature of 31.4 °C on the 29th was a Victorian January record and the State's second-highest for any month
  • Many sites had either their highest January mean daily maximum temperature on record or their highest January mean daily maximum temperature since the 1980s
  • Several sites had their warmest January night on record on the 28th or 29th
  • Several sites either equalled or exceeded their highest January mean daily minimum temperature on record
  • Laverton RAAF and Moorabbin Airport had their highest January mean daily minimum temperature since 1981
  • Several sites had either their highest January mean temperature on record or their highest January mean temperature for at least 20 years

Further information

Media
(03) 9669 4057
Enquiries

Extremes in January 2018
Hottest day 46.4 °C at Walpeup Research on the 19th
Warmest days on average 36.3 °C at Walpeup Research
Coolest days on average 17.5 °C at Mount Hotham
Coldest day 6.5 °C at Mount Baw Baw on the 30th
Coldest night -1.5 °C at Mount Hotham on the 14th
Coolest nights on average 9.2 °C at Mount Hotham
Warmest nights on average 19.3 °C at Mildura Airport
Warmest night 31.4 °C at Mildura Airport on the 29th
Warmest on average overall 27.8 °C at Mildura Airport
Coolest on average overall 13.3 °C at Mount Hotham
Wettest overall 127.6 mm at Falls Creek
Wettest day 69.2 mm at Wangaratta Aero on the 28th
Strongest wind gust 104 km/h at Wilsons Promontory Lighthouse on the 31st

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 January daily rainfall
New record
(mm)
Old
record
Years of
record
Wangaratta Aero 69.2 on the 28th 60.6 on the 21st in 1995 31
Ocean Grove 36.6 on the 30th 35.8 on the 14th in 2011 22



Highest January total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
January
Wangaratta Aero 97.6 148.2 in 1995 44.1
Bullengarook East 90.6 95.6 in 1995* 49.7
Meerlieu (Springvale West) 61.7 67.8 in 1996* 45.7

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




Record highest January mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Walpeup Research 36.3 35.9 in 2001 69 31.9
Scoresby Research Institute 29.3 = 29.3 in 2001 59 26.2
Kyabram 33.9 33.8 in 1981 52 30.3
Portland (Cashmore Airport) 24.3 24.2 in 2001 35 22.0
Aireys Inlet 25.7 25.4 in 2014 26 22.9
Bendigo Airport 33.5 32.9 in 2009 26 29.9
Mortlake Racecourse 29.0 28.5 in 2014 26 26.0
Rhyll 25.9 25.5 in 2014 26 23.8
Redesdale 33.3 32.2 in 2014 24 29.4
Swan Hill Aerodrome 36.0 = 36.0 in 2001 21 33.0

Highest January mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
January
Wilsons Promontory Lighthouse 22.9 23.0 in 1981 20.3
Ballarat Aerodrome 28.7 29.1 in 1981* 25.2
Point Hicks (Lighthouse) 26.4 26.8 in 1988* 23.9

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




Record highest January daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Gabo Island Lighthouse 21.9 on the 28th 21.7 on the 28th in 1915 107 15.8
Mildura Airport 31.4 on the 29th 30.9 on the 24th in 2001 72 16.7
Ouyen (Post Office) 30.3 on the 29th = 30.3 on the 28th in 1957 62 15.5
Walpeup Research 30.1 on the 29th 29.2 on the 29th in 2009 51 15.4
Wonthaggi 26.5 on the 29th 25.0 on the 29th in 2009 48 13.1
Rhyll 25.6 on the 29th 24.8 on the 21st in 1997 27 15.4
Mallacoota 24.0 on the 28th = 24.0 on the 26th in 2003 25 15.6



Record highest January mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Wilsons Promontory Lighthouse 16.5 = 16.5 in 1951 138 14.1
East Sale 15.2 = 15.2 in 2011 72 12.9
Essendon Airport 16.4 16.0 in 2008 48 13.6
Wonthaggi 15.5 15.2 in 2001 47 13.1
Morwell (Latrobe Valley Airport) 14.8 14.7 in 1999 34 12.8
Rhyll 17.3 16.9 in 2008 26 15.4
Mallacoota 17.2 = 17.2 in 2006 24 15.6
Cape Nelson Lighthouse 15.8 15.6 in 2001 22 14.6

Highest January mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
January
Laverton RAAF 16.3 16.8 in 1981 13.8
Moorabbin Airport 16.4 16.6 in 1981 14.2



Record highest January mean temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Essendon Airport 22.4 22.3 in 1951 48 20.0
Wonthaggi 20.8 = 20.8 in 1981 47 18.5
Aireys Inlet 20.5 20.1 in 2001 26 18.5
Bendigo Airport 24.8 24.5 in 1999 26 22.0
Rhyll 21.7 21.1 in 2008 26 19.6
Redesdale 24.0 23.3 in 2001 24 21.3
Avalon Airport 21.8 = 21.8 in 2001 22 20.2
Cape Nelson Lighthouse 19.8 19.7 in 2014 22 18.0

Highest January mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
January
Wilsons Promontory Lighthouse 19.7 20.1 in 1908* 17.2
Moorabbin Airport 22.4 23.1 in 1981 20.0
Cape Otway Lighthouse 19.4 19.5 in 1981* 17.4

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




Summary statistics for January 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2018
Diff
from
average
Highest for
January
2018
Mean for
January
2018
Diff
from
average
Lowest for
January
2018
Total for
January
2018
Average
for
January
Rank of
January
2018
Fraction of
January
average
North Mallee (district 76)
Mildura Airport 36.2 +3.9 45.1 20th 19.3 +2.6 10.3 14th 3.4 22.4 low 15%
Ouyen (Post Office) 34.9 +2.5 44.2 6th 17.9 +2.4 8.3 14th 5.8 21.1 average 27%
Walpeup Research 36.3 +4.4 46.4 19th 17.8 +2.4 7.5 14th 5.8 22.4 average 26%
South Mallee (district 77)
Hopetoun Airport 35.3 +2.3 46.0 19th 16.4 +1.0 8.2 14th 5.4 33.1 v low 16%
Swan Hill Aerodrome 36.0 +3.0 45.6 20th 17.6 +1.5 9.2 14th 14.8 26.1 average 57%
North Wimmera (district 78)
Kellalac (Warracknabeal Airport) 34.4   45.2 19th 14.9   7.3 14th 4.8
Nhill Aerodrome 33.0 +1.9 44.2 19th 14.8 +0.9 7.3 14th 10.8 29.3 average 37%
Warracknabeal Museum 33.6 +2.7 44.0 6th 15.4 +1.3 7.8 14th 3.3 25.8 low 13%
South Wimmera (district 79)
Edenhope Airport 31.2 +1.7 43.0 19th 13.5 +0.3 5.9 14th 11.0 33.1 low 33%
Grampians (Mount William) 23.8 +2.9 36.1 19th 12.1 +2.1 3.3 31st 23.2 72.0 low 32%
Horsham Aerodrome 33.1 +2.1 45.1 19th 13.0 +0.4 5.9 14th 11.8 29.7 average 40%
Kanagulk 31.6 +1.9 44.2 19th 12.8 -0.1 6.4 14th 8.8 37.4 low 24%
Longerenong 33.4 +3.4 45.9 19th 14.1 +1.2 5.7 14th 13.2 24.9 average 53%
Pyrenees (Ben Nevis) 27.6 +2.6 40.0 19th 14.2 +2.0 5.6 14th 15.2 43.4 low 35%
Stawell Aerodrome 31.5 +2.3 43.6 19th 14.3 +0.7 8.7 17th 9.8 35.7 low 27%
Lower North (district 80)
Charlton 34.7 +2.3 44.7 19th 15.9 +0.4 8.4 14th 11.4 30.5 low 37%
Echuca Aerodrome 34.6 +3.7 44.1 20th 16.6 +1.4 9.3 14th 34.3 27.8 high 123%
Kerang 35.3 +3.7 44.7 20th 17.4 +2.2 9.0 14th 22.0 23.6 average 93%
Kyabram 33.9 +3.6 43.7 20th 16.4 +1.9 9.1 14th 40.0 33.9 high 118%
Upper North (district 81)
Bendigo Airport 33.5 +3.6 43.5 19th 16.0 +1.8 7.5 14th 16.4 34.1 average 48%
Shepparton Airport 33.8 +2.0 43.4 20th 16.6 +1.4 10.1 14th 33.6 28.0 average 120%
Tatura Inst Sustainable Ag 32.7 +3.0 42.7 20th 16.2 +2.0 10.7 16th 35.4 33.6 average 105%
Yarrawonga 35.3 +2.7 43.4 21st 17.2 +1.4 9.7 14th 33.0 34.4 average 96%
Lower Northeast (district 82)
Benalla Airport 33.6 +1.4 42.9 20th 16.8 +1.2 10.2 18th 31.9 40.2 average 79%
Corryong Airport 33.2 +0.8 41.5 7th 15.2 +1.4 9.0 15th 61.1 51.4 average 119%
Dartmouth Reservoir 30.6 +1.3 39.0 20th 15.5 +1.7 7.0 14th 54.8 62.6 average 88%
Hunters Hill 27.3 +1.4 35.5 20th 15.6 +1.3 4.3 14th 81.4 65.6 average 124%
Rutherglen Research 34.7 +3.3 43.2 21st 16.1 +2.4 6.9 17th 36.0 36.7 average 98%
Strathbogie 29.7 +2.4 38.9 20th 13.4 +1.8 5.1 17th 46.2 48.3 average 96%
Wangaratta Aero 34.3 +2.4 42.4 20th 15.4 +1.2 8.8 17th 97.6 44.1 v high 221%
Upper Northeast (district 83)
Falls Creek 18.9 +1.2 26.0 20th 10.5 +1.8 -0.6 14th 127.6 112.1 average 114%
Mount Buller 19.2 +1.9 26.7 20th 10.8 +2.0 -0.5 14th 87.8 77.9 average 113%
Mount Hotham 17.5 +1.2 25.1 20th 9.2 +1.2 -1.5 14th 106.8 103.5 average 103%
Omeo 28.3 +1.0 38.1 20th 12.5 +1.2 4.1 17th 73.0 51.3 high 142%
East Gippsland (district 84)
Combienbar AWS 26.5 +1.1 38.5 19th 14.8 +1.2 7.3 14th
Gabo Island Lighthouse 22.9 +1.6 26.2 19th 17.8 +2.0 13.0 14th 71.8 69.9 average 103%
Gelantipy 25.3 +1.4 35.0 19th 12.8 +1.1 4.6 17th 86.4 62.4 high 138%
Lakes Entrance (Eastern Beach Road) 25.2 +0.7 41.0 19th 16.3 +1.4 10.7 17th 59.8 39.4 high 152%
Mallacoota 24.9 +0.7 34.2 19th 17.2 +1.6 10.7 18th 96.8 64.4 high 150%
Mount Nowa Nowa 25.7 +0.9 41.6 19th 15.1 +0.8 8.7 14th 75.8 59.7 average 127%
Orbost 27.2 +0.9 40.8 19th 15.8 +1.1 10.1 17th 60.4 43.8 high 138%
Point Hicks (Lighthouse) 26.4 +2.5 36.8 19th 16.8 +1.0 10.4 14th 100.7 63.4 high 159%
West Gippsland (district 85)
Bairnsdale Airport 26.8 +0.9 42.1 19th 14.6 +1.7 8.3 10th 47.4 48.0 average 99%
Corner Inlet (Yanakie) 24.7   39.3 6th 15.2   9.0 10th 52.6
East Sale 27.0 +1.5 40.9 19th 15.2 +2.3 8.9 10th 44.0 44.8 average 98%
East Sale Airport 27.6   41.9 19th 15.5   9.7 10th 51.8
Morwell (Latrobe Valley Airport) 28.4 +1.9 40.1 19th 14.8 +2.0 6.5 10th 33.8 47.7 low 71%
Mount Baw Baw 18.7 +1.3 27.9 19th 9.9 +1.3 0.8 31st 70.4 90.9 average 77%
Mount Moornapa 26.9 +1.4 40.7 19th 14.3 +1.0 8.6 14th 61.4 63.5 average 97%
Nilma North (Warragul) 28.0   39.6 19th 14.4   6.3 10th 63.2
Pound Creek 26.6 +1.4 40.1 6th 14.2 +1.5 6.5 16th 38.6 34.7 average 111%
Wilsons Promontory Lighthouse 22.9 +2.6 38.4 6th 16.5 +2.4 11.8 14th 59.4 51.5 high 115%
Yarram Airport 26.1 +0.4 39.9 6th 14.4 +1.6 6.7 10th 57.0 38.0 high 150%
East Central (district 86)
Cerberus 26.3 +1.9 41.9 6th 15.3 +1.5 9.7 5th 53.6 38.4 high 140%
Coldstream 29.1 +1.2 40.3 19th 13.7 +1.8 6.0 17th 64.8 44.0 high 147%
Cranbourne Botanic Gardens     41.1 19th 14.8 +1.3 9.1 10th 52.3 52.2 average 100%
Essendon Airport 28.4 +1.9 42.5 19th 16.4 +2.8 10.9 14th 68.6 42.6 high 161%
Ferny Creek 25.3   37.1 19th 14.1   8.0 14th 40.2
Frankston AWS 26.5 +1.7 38.1 19th 16.9 +1.4 11.9 14th
Melbourne (Olympic Park) 27.2   41.7 6th 17.3   12.4 17th 65.4
Melbourne Airport 28.3 +1.9 42.4 19th 15.5 +1.7 10.3 14th 68.2 40.5 high 168%
Moorabbin Airport 27.9 +2.1 42.3 6th 16.4 +2.2 11.1 17th 64.0 44.4 high 144%
Rhyll 25.9 +2.1 37.2 28th 17.3 +1.9 13.2 14th 44.8 37.2 average 120%
Scoresby Research Institute 29.3 +3.1 41.0 19th 15.7 +2.4 8.2 17th 52.4 52.4 average 100%
Viewbank 29.1 +1.3 42.0 6th 15.9 +1.4 10.0 16th 81.2 40.5 v high 200%
Wonthaggi 26.1 +2.1 40.5 6th 15.5 +2.4 9.5 10th 37.6 47.8 average 79%
West Central (district 87)
Avalon Airport 28.3 +1.9 44.2 6th 15.2 +1.1 9.9 14th 29.0 33.1 average 88%
Breakwater (Geelong Racecourse) 25.8   40.9 19th 15.2   10.9 14th 53.8
Laverton RAAF 27.5 +1.8 43.1 6th 16.3 +2.5 10.2 17th 67.2 39.6 v high 170%
Sheoaks 28.4 +2.5 42.4 19th 13.6 +1.3 7.3 17th 32.8 35.1 average 93%
North Central (district 88)
Eildon Fire Tower 28.6 +1.4 39.2 20th 15.1 +1.6 6.9 14th 64.6 41.7 high 155%
Lake Eildon 31.4 +2.5 41.3 20th 14.3 +1.6 6.9 10th 54.0 47.2 average 114%
Mangalore Airport 32.5 +2.7 43.1 20th 15.9 +1.7 10.0 14th 25.4 40.8 average 62%
Redesdale 33.3 +3.9 42.5 19th 14.2 +1.1 8.5 3rd 65.8 34.0 high 194%
Wallan (Kilmore Gap) 27.0 +2.0 38.4 19th 13.7 +1.4 7.9 14th 83.4 47.5 high 176%
Western Plains (district 89)
Ararat Prison 30.2 +3.2 42.8 19th 9.3 -2.0 3.0 17th 15.8 39.5 low 40%
Ballarat Aerodrome 28.7 +3.5 40.5 19th 13.2 +2.3 6.7 14th 43.8 39.5 average 111%
Westmere 30.0 +1.8 43.5 19th 11.1 -0.2 3.7 10th 9.6 43.5 low 22%
West Coast (district 90)
Aireys Inlet 25.7 +2.8 42.1 6th 15.3 +1.3 11.1 14th 20.0 37.8 low 53%
Cape Nelson Lighthouse 23.7 +2.4 40.8 6th 15.8 +1.2 11.5 24th 10.2 33.7 low 30%
Cape Otway Lighthouse 23.5 +2.1 40.5 6th 15.3 +2.0 11.0 13th 59.8 44.0 high 136%
Casterton 30.3 +2.4 42.4 28th 12.3 +0.1 4.0 14th 6.6 35.8 low 18%
Colac (Mount Gellibrand) 28.0 +2.3 41.6 19th 14.0 +1.5 8.8 14th 9.6 34.5 low 28%
Dartmoor 28.5   43.5 6th 12.4   5.9 10th 9.4
Hamilton Airport 29.5 +3.0 42.6 19th 12.3 +1.2 5.7 10th 10.8 33.8 low 32%
Mortlake Racecourse 29.0 +3.0 43.2 6th 11.3 +0.4 4.1 10th 13.0 34.6 low 38%
Port Fairy AWS 24.2 +1.6 42.1 6th 14.6 +0.6 10.0 5th 9.6 32.0 v low 30%
Portland (Cashmore Airport) 24.3 +2.3 39.4 6th 13.3 +1.0 6.8 5th 20.6 36.8 average 56%
Warrnambool Airport NDB 26.3 +1.8 42.6 6th 12.8 +1.0 6.0 24th 12.4 34.9 low 36%

Notes

The Monthly climate summary, generally published on the first working day of each month, 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This statement has been prepared based on information available at 10 am on Thursday 1 February 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
Enquiries