Western Australia in December 2019: record hot December

It was the warmest December on record, and driest December for twenty-seven years for Western Australia. Almost the entire State saw mean maximum temperatures being highest on record. The state-wide averaged mean temperature and maximum temperature topped previous respective records by a large margin. Rainfall was below average along most of the west and south coasts, and the eastern parts of the State.

Dry along the west and south coasts, and eastern parts

  • December rainfall was 51% below average and it was the driest December for twenty-seven years since 1992 for WA
  • It was the driest December for ten years since 2009 for the South West Land Division
  • Monthly rainfall totals were mostly less than 5 mm in the State's west, central and southeast, and several sites in the Eucla, South Coast and Southeast Coastal districts either had their driest December on record or driest December for over 20 years

Above average daytime temperatures across WA

  • It was Western Australia hottest December on record, with the State mean temperature 3.35 °C above average and more than half a degree warmer than the previous record in 1972
  • The State's mean maximum temperature was 4.25 °C above average, which was the highest on record for December, and about one and half a degree higher than the previous record in 1972
  • Amongst numerous December mean maximum temperature records across WA, it was the first time that inland Gascoyne and Southern Interior districts had their monthly means in excess of 40 °C
  • Giles's mean maximum temperature of 40.7 °C was 2 °C higher than its previous December record in 1972, which was exacerbated by a record run of 15 consecutive days of over 40 °C between the 17th and 31th with Christmas Day being its highest December temperature on record at 46.8°C
  • Record high December temperatures were reported in the north and south throughout December, though the State's far southeast had the hottest sites on the 19th
  • Eucla (town) and Forrest recorded 49.8 °C and 49.5 °C on the 19th respectively, which was not only their December record, but also the State's highest and second-highest December temperature on record
  • The State's mean minimum temperature was 2.44 °C above average, which was the highest on record; numerous sites across WA had their highest December mean minimum temperature on record
  • Record hot nights were observed in the west Kimberley on the 1st, in the Goldfields on the 7th, and in the Pilbara and Southern Interior towards the end of December
  • Telfer Aero in inland east Pilbara first equalled previous State's highest minimum temperature with 35.0 °C on the 27th, then toppled it with 35.1 °C on the 29th

Further information

Media
(03) 9669 4057
Enquiries

Extremes in December 2019
Hottest day 49.8 °C at Eucla on the 19th
49.5 °C at Forrest on the 19th
Warmest days on average 44.1 °C at Marble Bar
Coolest days on average 23.5 °C at Albany
Coldest day 17.6 °C at Albany on the 8th
Coldest night 4.0 °C at Newdegate Research Station on the 1st
Coolest nights on average 11.9 °C at Bridgetown
Warmest nights on average 29.0 °C at Troughton Island
Warmest night 35.1 °C at Telfer Aero on the 29th
35.0 °C at Telfer Aero on the 27th
Warmest on average overall 36.0 °C at Marble Bar
Coolest on average overall 19.5 °C at Albany
Wettest overall 143.4 mm at Kimbolton
Driest overall 0 mm at Arena and others
Wettest day 58.8 mm at Argyle Aerodrome on the 19th
Strongest wind gust 117 km/h at Wyndham Aero on the 23rd

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 December daily rainfall
New record
(mm)
Old
record
Years of
record
Telina Downs 41.4 on the 26th 37.6 on the 26th in 1991 55



Record lowest December total rainfall
New record
(mm)
Old
record
Years of
record
Average for
December
Jacup 1.2 2.6 in 2006 26 28.0
Hopetoun North 1.4 1.6 in 2009 24 23.9

Lowest December total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
December
Albany 4.0 2.2 in 1949* 30.1
Eyre 3.2 3.0 in 1934* 20.9
Ongerup 0.6 =0.6 in 1974* 17.5
Eucla 1.0 =1.0 in 1976 18.7
Newdegate Research Station 0.4 0.2 in 1979 15.3
Mundrabilla Station 2.6 0.0 in 1984 18.9
Carnegie 2.8 0.0 in 1986 24.3
White Gums 0.4 =0.4 in 1986* 21.0
Fossil Downs 42.0 0.4 in 1992 86.9
Merredin 0.2 0.0 in 1993 14.0
Ruby Plains 11.6 0.0 in 1992* 76.3
Sturt Creek 11.5 5.0 in 1992* 64.7
Newbicup 1.4 0.2 in 1994* 16.7
Hyden 1.2 0.2 in 1997 14.5
Lansdowne 20.4 13.2 in 1966* 101.2
Gibb Rock 0.2 0.0 in 1997* 15.9
Hines Hill 0.6 0.0 in 1997* 9.3

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




Record highest December temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Eucla 49.8 on the 19th 49.3 on the 17th in 1912 101 24.9
Giles Meteorological Office 46.8 on the 25th 45.1 on the 28th in 2018 64 35.8
Ongerup 42.6 on the 16th 42.5 on the 23rd in 1997 52 27.2
Telfer Aero 47.9 on the 27th 47.5 on the 21st in 1990 46 40.3
Curtin Aero 46.8 on the 18th 46.7 on the 21st in 2018 29 38.4
Laverton Aero 45.5 on the 29th 44.3 on the 18th in 2015 29 33.9
Forrest 49.5 on the 19th 46.5 on the 27th in 2013 27 31.6
Mount Elizabeth 42.1 on the 8th 40.9 on the 8th in 2009 26 34.1
Southern Cross Airfield 45.7 on the 18th = 45.7 on the 30th in 2013 24 32.8
Fitzroy Crossing Aero 47.4 on the 18th 46.7 on the 25th in 2018 23 39.2
Kalumburu 42.9 on the 6th 42.6 on the 20th in 2018 22 35.4
Barrow Island Airport 42.4 on the 27th 40.3 on the 30th in 2014 21 32.2
North Island 39.4 on the 13th 36.0 on the 27th in 2000 20 26.5
Varanus Island 39.0 on the 28th 37.0 on the 21st in 2011 20 31.1



Record highest December mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Cape Naturaliste 28.4 28.0 in 1999 115 23.6
Northam 36.8 35.5 in 1977 115 32.1
Donnybrook 34.1 32.6 in 1931 114 28.2
Narrogin 33.8 32.8 in 1957 99 29.0
Dwellingup 32.1 30.5 in 1977 81 27.3
Broome Airport 36.7 36.3 in 2012 80 33.9
Manjimup 30.9 29.1 in 1972 80 24.9
Kalgoorlie-Boulder Airport 37.2 36.5 in 1972 78 32.0
Salmon Gums Res.Stn. 34.9 33.8 in 1972 78 29.0
Perth Airport 33.9 32.4 in 1999 75 29.0
Port Hedland Airport 40.8 39.4 in 2009 71 36.6
Meekatharra Airport 40.2 39.7 in 1972 69 36.5
Bencubbin 37.5 36.5 in 1972 68 32.4
Giles Meteorological Office 40.7 38.7 in 1972 63 35.8
Mardie 41.0 40.6 in 1985 63 37.5
Eyre 32.0 29.7 in 2013 60 25.6
Bidyadanga 38.1 37.7 in 1979 59 35.0
Pearce RAAF 35.5 34.1 in 1972 59 30.4
Ravensthorpe 32.2 31.7 in 1972 57 27.2
Warmun 42.5 41.8 in 1986 56 38.4
Merredin 37.3 35.8 in 1972 53 32.1
Onslow Airport 38.9 38.6 in 1947 53 35.9
Brookton 35.9 35.1 in 1977 52 31.0
Wongan Hills 37.5 36.2 in 1972 52 32.5
Badgingarra Research Stn 35.7 35.6 in 1977 50 32.0
Esperance 28.2 28.1 in 1972 50 24.6
Jurien Bay 31.0 30.9 in 2009 50 28.2
Narembeen 37.4 36.2 in 1977 50 32.0
Beverley 37.3 35.9 in 1972 49 32.2
Pingelly 34.9 33.5 in 1972 47 30.1
Warburton Airfield 41.4 39.1 in 1977 47 36.7
Hyden 37.7 35.4 in 1972 46 31.9
Telfer Aero 43.3 43.2 in 2018 45 40.3
Wagin 33.9 33.4 in 1972 45 29.3
Learmonth Airport 41.0 39.1 in 1979 44 36.9
Paynes Find 39.5 39.2 in 2009 40 35.0
Troughton Island 34.5 34.0 in 2002 40 33.0
Jarrahwood 32.7 29.3 in 1977 36 27.2
Cygnet Bay 37.1 36.7 in 2002 33 34.8
Derby Aero 40.6 39.3 in 1972 33 37.2
Kununurra Aero 41.4 = 41.4 in 1986 33 37.2
Carnegie 41.4 40.1 in 2015 30 37.5
Jandakot Aero 32.8 31.5 in 2009 29 29.1
Curtin Aero 41.6 41.5 in 1992 28 38.4
Esperance Aero 30.7 28.5 in 2012 28 25.9
Laverton Aero 38.9 36.0 in 2014 28 33.9
Murchison 40.5 39.9 in 2008 28 37.4
Rottnest Island 28.1 27.8 in 1999 28 25.0
Forrest 36.3 34.6 in 2015 26 31.6
Jacup 31.7 29.0 in 2012 26 26.3
Karratha Aero 39.5 38.7 in 2009 26 35.8
Bickley 31.9 30.3 in 2009 25 28.1
Leinster Aero 40.1 37.6 in 1997 25 35.5
Mount Elizabeth 39.1 35.8 in 2004 25 34.1
Perth Metro 33.1 31.4 in 1999 25 29.1
Bunbury 30.4 29.6 in 1999 24 27.3
Mount Magnet Aero 40.3 37.7 in 2000 24 35.8
Cunderdin Airfield 37.5 34.7 in 2009 23 32.9
Gingin Aero 34.7 33.0 in 2002 23 30.6
Newdegate Research Station 35.1 31.7 in 2004 23 29.5
Paraburdoo Aero 42.7 = 42.7 in 1997 23 40.5
Rocky Gully 30.7 28.4 in 2012 23 25.5
Southern Cross Airfield 38.1 35.7 in 2000 23 32.8
Busselton Aero 31.6 29.6 in 2002 22 27.9
Dalwallinu 37.4 35.1 in 2000 22 33.2
Fitzroy Crossing Aero 43.2 43.0 in 2018 22 39.2
Lake Grace 34.7 31.7 in 2004 22 29.4
Morawa Airport 38.8 37.4 in 2009 22 35.2
York 36.8 34.6 in 2000 22 32.2
Kalumburu 39.8 39.6 in 2018 21 35.4
Shannon 29.4 26.9 in 2006 21 24.3
Thevenard Island 35.5 33.9 in 2012 21 32.0
Wandering 34.7 32.5 in 2009 21 30.3
Barrow Island Airport 35.5 34.4 in 2012 20 32.2
Bridgetown 32.6 29.6 in 2006 20 27.5
Katanning 33.1 31.2 in 2004 20 28.6
Norseman Aero 36.5 33.1 in 2000 20 31.1
Witchcliffe 27.9 27.3 in 2012 20 24.7

Highest December mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
December
Cape Leeuwin 24.7 25.5 in 1909 21.8
Mullewa 38.4 38.5 in 1926* 34.5
Albany 23.5 24.9 in 1941* 21.8
Karnet 31.8 32.6 in 1993 28.1
Swanbourne 30.3 30.5 in 1999 27.8

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




Record highest December daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Broome Airport 30.9 on the 1st 30.7 on the 24th in 2005 81 26.5
Kalgoorlie-Boulder Airport 29.4 on the 7th 29.1 on the 19th in 2005 79 16.6
Port Hedland Airport 30.1 on the 28th = 30.1 on the 26th in 2014 72 24.1
Giles Meteorological Office 32.1 on the 26th 31.4 on the 31st in 2010 64 21.9
Bidyadanga 30.0 on the 27th = 30.0 on the 9th in 2012 61 25.9
Onslow Airport 31.4 on the 30th 30.1 on the 28th in 2018 54 22.4
Telfer Aero 35.1 on the 29th 33.7 on the 25th in 2018 46 25.6
Troughton Island 30.3 on the 28th = 30.3 on the 12th in 2017 41 27.3
Eyre 26.8 on the 16th 23.5 on the 28th in 2007 33 14.1
Carnegie 32.6 on the 24th 31.2 on the 3rd in 1995 31 22.2
Warburton Airfield 32.8 on the 29th 32.1 on the 31st in 2010 31 21.5
Curtin Aero 32.9 on the 1st 30.5 on the 9th in 2016 29 25.1
Laverton Aero 31.5 on the 7th 30.6 on the 21st in 2009 29 19.8
Karratha Aero 31.2 on the 27th 30.6 on the 26th in 2012 27 25.6
Leinster Aero 30.1 on the 7th 30.0 on the 31st in 2010 26 21.2
Thevenard Island 30.1 on the 30th 28.9 on the 28th in 2018 23 23.7
Kalumburu 29.7 on the 28th 29.3 on the 13th in 2018 22 25.0
Norseman Aero 26.8 on the 19th = 26.8 on the 30th in 2009 21 13.9
Marble Bar 34.5 on the 19th 33.4 on the 20th in 2004 20 26.2
Varanus Island 29.1 on the 27th 28.5 on the 23rd in 2016 20 24.8



Record lowest December temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Warmun 16.0 on the 7th 17.0 on the 5th in 1987 57 25.1



Record highest December mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Narrogin 15.4 15.1 in 1977 99 12.4
Broome Airport 28.2 28.0 in 2015 80 26.5
Kalgoorlie-Boulder Airport 21.1 20.5 in 1972 78 16.6
Bencubbin 19.3 19.0 in 1972 69 16.0
Giles Meteorological Office 25.1 24.4 in 1972 63 21.9
Eyre 16.7 16.2 in 1914 60 14.1
Ravensthorpe 14.8 14.6 in 1977 57 12.8
Merredin 18.9 18.7 in 1977 53 15.8
Onslow Airport 25.5 25.3 in 2012 53 22.4
Brookton 16.0 15.9 in 2011 52 13.5
Badgingarra Research Stn 17.3 17.2 in 2010 49 15.0
Warburton Airfield 25.8 23.9 in 1977 46 21.5
Telfer Aero 28.4 27.8 in 2018 45 25.6
Paynes Find 21.2 20.8 in 1997 40 18.5
Troughton Island 29.0 28.6 in 2002 40 27.3
Cygnet Bay 27.1 26.9 in 2015 33 25.6
Derby Aero 27.6 27.5 in 2015 33 26.3
Carnegie 25.4 24.7 in 1989 30 22.2
Jandakot Aero 17.7 16.7 in 2011 29 14.7
Esperance Aero 15.0 14.4 in 2000 28 13.4
Laverton Aero 23.9 21.7 in 2012 28 19.8
Rottnest Island 19.8 19.0 in 2011 28 17.6
Forrest 17.7 15.8 in 2018 26 15.0
Jacup 13.0 12.7 in 2000 26 11.5
Karratha Aero 27.6 27.1 in 2012 26 25.6
Swanbourne 19.5 18.3 in 2011 26 16.5
Bickley 16.5 15.4 in 2012 25 13.6
Leinster Aero 24.1 23.3 in 2012 25 21.2
Mount Elizabeth 23.8 23.3 in 2016 25 22.4
Perth Metro 18.3 18.2 in 2011 25 16.3
Mount Magnet Aero 23.8 23.3 in 2009 24 21.2
Cunderdin Airfield 16.9 16.7 in 2012 23 14.8
Newman Aero 26.2 25.7 in 2018 23 24.0
Paraburdoo Aero 26.5 26.3 in 2011 23 24.6
Southern Cross Airfield 18.6 17.6 in 2012 23 15.5
York 15.8 15.6 in 2011 23 13.9
Dalwallinu 17.7 17.2 in 1999 22 15.8
Fitzroy Crossing Aero 27.9 27.0 in 2018 22 25.7
Morawa Airport 19.0 18.9 in 2012 22 17.5
Thevenard Island 26.0 25.8 in 2012 22 23.7
Norseman Aero 16.9 15.4 in 2011 20 13.9

Highest December mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
December
Cape Naturaliste 16.5 16.7 in 1972 13.9
Carnarvon Airport 22.4 23.0 in 1972 20.7
Meekatharra Airport 25.2 25.7 in 1972 22.1
Perth Airport 17.7 17.8 in 1977 14.9
Beverley 16.2 17.1 in 1977* 14.4
Northam 17.6 17.8 in 1977* 15.3
Pingelly 15.9 16.2 in 1977* 13.9
Dwellingup 15.2 15.7 in 1977* 12.6
Esperance 15.7 =15.7 in 1982 14.4
Salmon Gums Res.Stn. 14.2 14.3 in 1983* 12.2
Curtin Aero 26.5 26.8 in 1993 25.1
Eucla 17.0 18.5 in 1994 15.1

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




Record highest December mean temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Cape Naturaliste 22.5 22.2 in 1931 115 18.8
Northam 27.2 26.9 in 1972 115 23.7
Narrogin 24.6 23.9 in 1977 98 20.6
Dwellingup 23.7 23.1 in 1977 81 20.0
Broome Airport 32.5 31.8 in 2012 80 30.2
Manjimup 22.1 21.7 in 1972 80 18.3
Kalgoorlie-Boulder Airport 29.1 28.5 in 1972 78 24.3
Salmon Gums Res.Stn. 24.6 = 24.6 in 1972 78 20.6
Perth Airport 25.8 24.8 in 1999 75 22.0
Port Hedland Airport 33.5 32.3 in 2009 71 30.4
Meekatharra Airport 32.7 = 32.7 in 1972 69 29.3
Bencubbin 28.4 27.8 in 1972 68 24.2
Giles Meteorological Office 32.9 31.6 in 1972 63 28.9
Mardie 33.5 32.8 in 1979 63 30.3
Eyre 24.3 21.8 in 2015 60 19.9
Pearce RAAF 26.2 25.1 in 1977 59 22.5
Ravensthorpe 23.4 23.1 in 1972 57 20.0
Mandora 33.0 32.5 in 2012 53 30.6
Merredin 28.1 27.2 in 1972 53 24.0
Onslow Airport 32.2 31.1 in 2012 53 29.1
Brookton 26.0 25.3 in 1977 52 22.3
Wongan Hills 27.8 26.9 in 1977 52 24.1
Esperance 22.1 21.9 in 1972 50 19.5
Jurien Bay 24.2 23.9 in 2011 50 21.9
Narembeen 27.2 26.5 in 1977 50 23.2
Badgingarra Research Stn 26.5 25.8 in 1972 49 23.5
Beverley 26.7 26.4 in 1972 49 23.3
Pingelly 25.3 24.7 in 1977 47 22.0
Hyden 26.6 25.8 in 1977 46 22.9
Warburton Airfield 33.6 31.5 in 1977 46 29.1
Telfer Aero 35.9 35.5 in 2018 45 32.9
Wagin 24.4 24.2 in 1972 45 21.1
Learmonth Airport 31.7 30.7 in 1979 44 28.9
Paynes Find 30.3 30.0 in 2009 40 26.7
Troughton Island 31.7 31.3 in 2002 40 30.2
Jarrahwood 22.3 21.8 in 1977 36 19.1
Cygnet Bay 32.1 31.5 in 2015 33 30.2
Derby Aero 34.1 33.3 in 2015 33 31.8
Carnegie 33.4 32.2 in 1989 30 29.9
Jandakot Aero 25.3 24.0 in 1999 29 21.9
Curtin Aero 34.1 = 34.1 in 1993 28 31.8
Esperance Aero 22.9 21.4 in 2012 28 19.6
Laverton Aero 31.4 28.7 in 2012 28 26.8
Murchison 31.2 30.7 in 2009 28 28.8
Rottnest Island 23.9 23.4 in 1999 28 21.3
Forrest 27.0 25.1 in 2015 26 23.3
Jacup 22.4 20.7 in 2012 26 18.9
Karratha Aero 33.6 32.4 in 2009 26 30.7
Swanbourne 24.9 24.1 in 2011 26 22.2
Bickley 24.2 22.3 in 2012 25 20.9
Leinster Aero 32.1 29.9 in 2012 25 28.3
Mount Elizabeth 31.5 29.3 in 2004 25 28.2
Perth Metro 25.7 24.6 in 1999 25 22.7
Bunbury 22.8 22.7 in 1999 24 20.3
Mount Magnet Aero 32.2 30.5 in 2009 24 28.5
Cunderdin Airfield 27.2 25.6 in 2012 23 23.9
Gingin Aero 25.2 25.0 in 2002 23 22.5
Newdegate Research Station 24.1 22.5 in 2012 23 20.6
Newman Aero 34.0 33.7 in 2018 23 31.6
Paraburdoo Aero 34.6 34.3 in 1997 23 32.5
Rocky Gully 21.4 20.5 in 2012 23 18.2
Southern Cross Airfield 28.3 26.0 in 2000 23 24.2
Busselton Aero 22.4 = 22.4 in 1999 22 20.1
Dalwallinu 27.5 25.9 in 2000 22 24.5
Fitzroy Crossing Aero 35.5 35.0 in 2018 22 32.5
Lake Grace 24.9 23.3 in 2012 22 21.5
Morawa Airport 28.9 27.8 in 2009 22 26.3
York 26.2 24.9 in 2000 22 23.1
Shannon 20.9 19.8 in 1999 21 17.7
Wandering 24.2 22.8 in 2012 21 21.1
Barrow Island Airport 30.7 30.3 in 2012 20 28.3
Bridgetown 22.3 20.8 in 2012 20 19.2
Katanning 23.1 22.1 in 2012 20 20.1
Norseman Aero 26.7 24.0 in 2000 20 22.5
Thevenard Island 30.7 29.9 in 2012 20 27.9

Highest December mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
December
Cape Leeuwin 21.1 21.5 in 1909 18.8
Carnarvon Airport 27.1 27.3 in 1972 25.0
Mullewa 28.8 29.1 in 1972* 25.8
Kununurra Aero 33.6 =33.6 in 1991 31.4
Eucla 23.4 23.5 in 1994 20.0

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




Summary statistics for December 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
December
2019
Diff
from
average
Highest for
December
2019
Mean for
December
2019
Diff
from
average
Lowest for
December
2019
Total for
December
2019
Average
for
December
Rank of
December
2019
Fraction of
December
average
North Kimberley (district 01)
Kalumburu 39.8 +4.4 42.9 6th 25.9 +0.9 23.7 13th 52.8 228.2 v low 23%
Mount Elizabeth 39.1 +5.0 42.1 8th 23.8 +1.4 20.6 12th 58.5 168.2 low 35%
Troughton Island 34.5 +1.5 35.5 28th 29.0 +1.7 25.5 22nd 2.4 118.1 lowest 2%
Truscott 36.4 +2.2 38.9 6th 27.1 +1.0 23.3 29th 61.4 184.2 low 33%
Wyndham Aero 42.1 +4.1 45.5 7th 27.5 +0.8 21.9 24th 79.4 148.4 average 54%
East Kimberley (district 02)
Argyle Aerodrome 41.9 +4.5 44.6 17th 28.3 +2.3 21.3 19th 83.0 133.7 low 62%
Halls Creek Airport 41.8   45.0 18th 26.6   21.5 30th 36.0
Kununurra Aero 41.4 +4.2 44.7 6th 25.9 +0.4 22.3 16th 89.2 139.3 low 64%
Warmun 42.5 +4.1 45.0 17th     16.0 7th 63.3 119.0 average 53%
West Kimberley (district 03)
Bidyadanga 38.1 +3.1 45.0 18th     22.5 3rd 22.6 58.4 average 39%
Broome Airport 36.7 +2.8 42.4 2nd 28.2 +1.7 23.2 28th 36.6 62.4 average 59%
Curtin Aero 41.6 +3.2 46.8 18th 26.5 +1.4 20.9 6th 110.2 148.1 average 74%
Cygnet Bay 37.1 +2.3 39.6 24th 27.1 +1.5 22.6 13th 88.0 87.8 average 100%
Derby Aero 40.6 +3.4 45.4 18th 27.6 +1.3 21.4 6th 70.4 78.0 average 90%
Fitzroy Crossing Aero 43.2 +4.0 47.4 18th 27.9 +2.2 22.9 30th 63.8 134.5 low 47%
Yampi Sound (Defence) 40.9   45.4 1st 26.2   22.8 21st 84.2
De Grey (district 04)
Bedout Island 35.2 +1.8 36.7 25th 28.7 +1.7 26.9 26th
Karratha Aero 39.5 +3.7 46.2 19th 27.6 +2.0 23.3 2nd 5.6 13.4 average 42%
Legendre Island 33.6 +1.3 41.5 25th 27.5 +1.7 25.9 11th
Mandora 39.7 +3.0 46.8 18th 26.3 +1.8 20.1 3rd 4.4 33.3 average 13%
Marble Bar 44.1 +2.2 47.8 29th 27.8 +1.6 22.6 16th 7.4 29.6 low 25%
Port Hedland Airport 40.8 +4.2 46.8 25th 26.2 +2.1 20.5 3rd 1.6 18.5 average 9%
Roebourne Aero 42.3 +3.0 47.7 19th 26.9 +2.1 22.1 3rd 1.4 12.8 average 11%
Fortescue (district 05)
Barrow Island Airport 35.5 +3.3 42.4 27th 25.9 +1.4 22.2 10th 0 5.1 lowest 0%
Karijini North 42.2   47.2 29th 27.2   20.9 15th 9.0
Learmonth Airport 41.0 +4.1 47.9 29th 22.4 +1.5 18.5 7th 0.2 5.9 average 3%
Mardie 41.0 +3.5 47.4 28th 25.9 +2.9 21.7 10th 0 8.8 lowest 0%
Onslow Airport 38.9 +3.0 46.9 30th 25.5 +3.1 21.7 10th 0.4 3.3 average 12%
Thevenard Island 35.5 +3.5 42.7 28th 26.0 +2.3 21.9 3rd 0.4 6.9 average 6%
West Gascoyne (district 06)
Carnarvon Airport 31.8 +2.4 42.3 2nd 22.4 +1.7 17.9 7th 0 5.3 lowest 0%
Murchison 40.5 +3.1 44.6 26th 22.5 +2.3 17.5 20th 0.9 13.1 low 7%
Shark Bay Airport 34.6 +2.3 43.4 13th 20.9 +1.2 16.6 7th 0.4 8.5 average 5%
East Gascoyne (district 07)
Newman Aero 41.5 +2.3 46.0 29th 26.2 +2.2 18.8 2nd 6.6 34.9 low 19%
Paraburdoo Aero 42.7 +2.2 46.4 31st 26.5 +1.9 21.3 17th 12.8 26.1 average 49%
Murchison (district 07A)
Meekatharra Airport 40.2 +3.7 44.5 29th 25.2 +3.1 17.7 1st 7.0 14.4 average 49%
Mount Magnet Aero 40.3 +4.5 44.0 6th 23.8 +2.6 17.5 1st 1.6 19.5 low 8%
Paynes Find 39.5 +4.5 43.6 26th 21.2 +2.7 15.4 1st 4.4 12.2 average 36%
North Coast (district 08)
Dalwallinu 37.4 +4.2 43.4 15th 17.7 +1.9 12.0 20th 0 12.3 lowest 0%
Geraldton Airport 32.8   43.9 13th 18.0   14.2 21st 1.0
Kalbarri 32.8 +1.6 43.6 13th 19.2 +1.7 14.7 20th 0 3.9 lowest 0%
Morawa Airport 38.8 +3.6 43.9 26th 19.0 +1.5 12.7 20th 0.2 14.5 v low 1%
Mullewa 38.4 +3.9 43.8 11th 19.2 +2.1 14.4 20th 3.4 8.5 average 40%
North Island 28.4 +1.9 39.4 13th 21.0 +1.1 15.7 7th 0.8 4.2 average 19%
Wongan Hills 37.5 +5.0 43.2 15th 17.7 +1.9 12.0 1st 3.4 9.9 average 34%
Central Coast (district 09)
Badgingarra Research Stn 35.7 +3.7 43.1 15th 17.3 +2.3 9.3 20th 1.2 9.0 average 13%
Bickley 31.9 +3.8 39.6 15th 16.5 +2.9 9.6 1st 8.0 14.6 average 55%
Garden Island HSF 28.0 +2.6 38.3 13th 19.7 +2.5 13.8 1st 1.4 10.4 low 13%
Gingin Aero 34.7 +4.1 43.4 15th 15.6 +1.3 9.8 9th 1.0 10.1 average 10%
Jandakot Aero 32.8 +3.7 40.4 13th 17.7 +3.0 11.3 9th 3.8 10.6 average 36%
Jurien Bay 31.0 +2.8 42.6 13th 17.2 +1.6 13.4 28th 1.0 6.5 average 15%
Karnet 31.8 +3.7 38.0 15th     10.2 1st 8.2 18.8 average 44%
Lancelin 29.1 +1.8 41.0 12th 17.3 +1.1 11.9 26th 1.5 8.4 low 18%
Millendon (Swan Valley) 34.6   42.2 15th 16.9   11.1 9th 2.8
Pearce RAAF 35.5 +5.1 43.9 15th 16.9 +2.4 10.6 9th 0.8 10.9 low 7%
Perth Airport 33.9 +4.9 41.6 15th 17.7 +2.8 12.1 28th 2.2 11.2 low 20%
Perth Metro 33.1 +4.0 41.6 3rd 18.3 +2.0 12.9 31st 2.4 10.6 low 23%
Rottnest Island 28.1 +3.1 37.9 13th 19.8 +2.2 14.9 1st 1.8 10.9 low 17%
Swanbourne 30.3 +2.5 39.3 13th 19.5 +3.0 14.0 31st 2.8 11.1 average 25%
South Coast (district 09A)
Albany 23.5 +1.7 31.4 15th 15.5 +1.5 9.6 9th 4.0 30.1 v low 13%
Albany Airport 26.7   38.4 15th 12.8   4.9 9th 5.2
Bridgetown 32.6 +5.1 39.5 15th 11.9 +0.9 5.6 9th 7.4 18.9 average 39%
Bunbury 30.4 +3.1 36.9 6th 15.1 +1.7 9.3 8th 0.2 17.0 v low 1%
Busselton Aero 31.6 +3.7 38.7 14th 13.4 +1.0 7.3 31st 1.6 10.4 low 15%
Cape Leeuwin 24.7 +2.9 33.4 6th 17.5 +1.7 13.9 9th 15.4 20.6 average 75%
Cape Naturaliste 28.4 +4.8 36.0 14th 16.5 +2.6 10.6 1st 2.2 13.5 low 16%
Collie East 33.0 +4.5 39.4 14th 12.9 +1.5 8.2 9th 1.0 20.8 v low 5%
Donnybrook 34.1 +5.9 40.0 14th       3.2 16.4 low 20%
Dwellingup 32.1 +4.8 39.4 15th 15.2 +2.6 9.9 1st 9.4 20.9 average 45%
Esperance 28.2 +3.6 39.3 14th 15.7 +1.3 9.4 10th 4.0 19.8 v low 20%
Esperance Aero 30.7 +4.8 40.9 14th 15.0 +1.6 8.7 10th 34.6 22.1 high 157%
Hopetoun North 25.6 +1.6 35.3 14th 14.8 +1.1 9.2 10th 1.4 23.9 lowest 6%
Jarrahwood 32.7 +5.5 39.3 15th 12.2 +1.1 5.0 9th 3.2 17.0 low 19%
Mandurah 30.3 +3.3 39.5 12th 20.1 +3.0 13.3 1st 0.4 15.9 v low 3%
Manjimup 30.9 +6.0 38.3 15th 13.4 +1.7 8.4 1st 6.2 25.4 low 24%
North Walpole 26.1 +3.7 37.3 6th 13.4 +0.6 8.3 9th 16.6 42.9 low 39%
Rocky Gully 30.7 +5.2 38.8 15th 12.1 +1.1 5.5 9th 4.8 29.2 v low 16%
Shannon 29.4 +5.1 38.2 6th 12.3 +1.1 6.2 9th 18.6 32.1 average 58%
Witchcliffe 27.9 +3.2 37.4 13th 13.1 +0.7 7.1 31st 18.8 18.6 average 101%
North Central (district 10)
Bencubbin 37.5 +5.1 42.5 26th 19.3 +3.3 12.4 1st 5.9 13.4 average 44%
Cunderdin Airfield 37.5 +4.6 44.7 15th 16.9 +2.1 10.3 20th 0 8.5 lowest 0%
Merredin 37.3 +5.2 43.6 26th 18.9 +3.1 10.5 1st 0.2 14.0 low 1%
Northam 36.8 +4.7 44.5 15th 17.6 +2.3 11.1 1st 0.9 9.2 low 10%
York 36.8 +4.6 44.1 15th 15.8 +1.9 9.5 1st 0 12.2 lowest 0%
South Central (district 10A)
Beverley 37.3 +5.1 44.0 15th 16.2 +1.8 10.2 1st 2.2 10.4 average 21%
Brookton 35.9 +4.9 42.8 15th 16.0 +2.5 9.4 1st 0 10.4 lowest 0%
Hyden 37.7 +5.8 43.9 15th 15.5 +1.7 7.0 1st 1.2 14.5 low 8%
Jacup 31.7 +5.4 42.2 15th 13.0 +1.5 5.9 9th 1.2 28.0 lowest 4%
Katanning 33.1 +4.5 40.7 15th 13.3 +1.6 7.6 1st 6.8 25.2 average 27%
Lake Grace 34.7 +5.3 42.4 15th 15.1 +1.6 8.1 1st 1.2 21.3 v low 6%
Narembeen 37.4 +5.4 43.0 15th 16.7 +2.2 9.1 1st 0 12.8 lowest 0%
Narrogin 33.8 +4.8 41.5 15th 15.4 +3.0 8.5 1st 1.0 14.1 low 7%
Newdegate Research Station 35.1 +5.6 42.6 15th 13.0 +1.4 4.0 1st 0.4 15.3 v low 3%
Pingelly 34.9 +4.8 42.4 15th 15.9 +2.0 9.0 1st 0 12.6 lowest 0%
Ravensthorpe 32.2 +5.0 42.2 26th 14.8 +2.0 8.5 9th 6.7 23.9 low 28%
Wagin 33.9 +4.6 41.7 15th 14.7 +1.8 9.1 1st 1.4 13.3 low 11%
Wandering 34.7 +4.4 42.3 15th 13.7 +1.7 8.6 1st 3.2 18.0 average 18%
Eucla (district 11)
Eucla 29.9 +5.0 49.8 19th 17.0 +1.9 8.0 3rd 1.0 18.7 v low 5%
Eyre 32.0 +6.4 42.6 15th 16.7 +2.6 4.9 3rd 3.2 20.9 low 15%
Forrest 36.3 +4.7 49.5 19th 17.7 +2.7 9.0 3rd 0.4 25.1 v low 2%
Red Rocks Point 27.5 +2.8 43.3 16th 17.8 +1.3 9.6 3rd 2.0 19.1 v low 10%
South East (district 12)
Bulga Downs 39.8 +3.7 45.0 18th 22.7 +2.5 14.5 1st
Kalgoorlie-Boulder Airport 37.2 +5.2 44.0 18th 21.1 +4.5 11.7 1st 13.6 16.5 average 82%
Laverton Aero 38.9 +5.0 45.5 29th 23.9 +4.1 13.9 1st 1.8 28.8 v low 6%
Leinster Aero 40.1 +4.6 44.9 29th 24.1 +2.9 14.5 1st 7.6 25.4 low 30%
Leonora Aero 39.5 +4.2 45.8 18th 24.3 +3.4 14.9 1st 10.4 17.0 average 61%
Munglinup West 32.3 +4.8 43.4 26th 14.1 +1.5 8.4 9th 5.2 26.8 low 19%
Norseman Aero 36.5 +5.4 44.2 18th 16.9 +3.0 8.3 1st 29.8 21.1 average 141%
Salmon Gums Res.Stn. 34.9 +5.9 43.8 18th 14.2 +2.0 5.5 9th 7.8 19.7 average 40%
Southern Cross Airfield 38.1 +5.3 45.7 18th 18.6 +3.1 10.2 1st 20.0 16.0 high 125%
North East (district 13)
Carnegie 41.4 +3.9 46.2 29th 25.4 +3.2 16.0 1st 2.8 24.3 low 12%
Giles Meteorological Office 40.7 +4.9 46.8 25th 25.1 +3.2 14.6 1st 4.4 46.6 v low 9%
Telfer Aero 43.3 +3.0 47.9 27th 28.4 +2.8 22.2 2nd 20.2 47.1 average 43%
Warburton Airfield 41.4 +4.7 46.8 19th 25.8 +4.3 15.4 1st 10.8 31.3 average 35%
Wiluna Aero 40.3   45.7 29th 24.8   15.3 1st 3.8
Offshore Islands (district 200)
Adele Island 33.5   34.8 23rd 29.0   23.8 28th
Browse Island 32.3   34.3 19th 29.0   24.0 22nd
Varanus Island 33.3 +2.2 39.0 28th 26.7 +1.9 24.8 11th 0 2.5 lowest 0%

Notes

The Monthly climate summary, generally published on the first working day of each month, lists the main features of the weather in Western Australia 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 Wednesday 8 January 2020. 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