Western Australia in summer 2019-20: record warm nights

Western Australia mean temperature in summer 2019–20 was the second–highest on record. The State mean minimum and maximum temperatures also ranked the highest and fifth–highest for summer on record respectively. Tropical cyclones Blake and Damien brought heavy falls to parts of the Pilbara, east Gascoyne and State's interior. Summer rainfall was slightly above average for the State as a whole.

Wet in the Pilbara and interior

  • Above average to very much above average rainfall in parts of the Pilbara, east Gascoyne and the State's interior due to tropical cyclones Blake and Damien
  • The far northwest corner of WA experienced another dry summer following a poor season in 2018-19; Learmonth Airport recorded 0.2 mm this summer but zero rain last season
  • WA rainfall in summer 2019–20 was 9% above average, which was wetter than last summer
  • Tropical cyclone Blake produced a number of summer daily rainfall records in the Pilbara and Southern Interior on 9 and 10 January
  • Youno Downs and Bryah in the east Gascoyne had their wettest summer day on 16 January from thunderstorms and 16 February from the remnant of tropical cyclone Damien

Very warm days and nights for most of WA

  • Daytime temperatures were above to very much above average across most of WA, with record high maxima in southern coastal areas
  • WA summer mean maximum temperature was 1.91 °C above average, making it the fifth–warmest summer on record
  • Overnight temperatures were above average across WA, and about 90 percent of the State had very much above average mean minimum temperatures (decile 10)
  • WA summer mean minimum temperature was 1.38 °C above average, making it the highest for summer on record
  • December 2019 was a record hot month, and each of the State mean temperature, maximum and minimum temperature was the highest in December on record
  • Some sites in the State's southeast and the Kimberley had their hottest summer day on record and warmest summer night on record in December
  • Eucla recorded 49.8 °C on 19 December, which was the State highest temperature for 22 years since 21 February 1998 when 49.8 °C was recorded at Emu Creek Station
  • Telfer Aero in the east Pilbara recorded a minimum temperature of 35.1 °C on 29 December, which was the State highest minimum temperature since 21 February 2015 when 35.1 °C was recorded at Wittenoom

Further information

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Extremes in summer 2019-20
Hottest day 49.8 °C at Eucla on 19 Dec 2019
Warmest days on average 41.0 °C at Marble Bar
41.0 °C at Telfer Aero
Coolest days on average 23.0 °C at Albany
Coldest day 17.0 °C at Mount Barker on 30 Jan 2020
Coldest night 1.5 °C at Bridgetown on 4 Jan 2020
Coolest nights on average 12.6 °C at Rocky Gully
Warmest nights on average 28.3 °C at Bedout Island
Warmest night 35.1 °C at Telfer Aero on 29 Dec 2019
Warmest on average overall 34.2 °C at Telfer Aero
Coolest on average overall 19.7 °C at Albany
19.7 °C at North Walpole
Wettest overall 841.4 mm at Kalumburu
Driest overall 0.2 mm at Learmonth Airport
Wettest day 270.0 mm at Carnegie on 10 Jan 2020
Strongest wind gust 194 km/h at Karratha Aero on 8 Feb 2020

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 summer daily rainfall
New record
(mm)
Old
record
Years of
record
Bryah 114.4 on 10 Feb 2020 88.0 on 19 Dec 1988 70
Carnegie 270.0 on 10 Jan 2020 127.0 on 6 Feb 1946 66
Prenti Downs 148.5 on 10 Jan 2020 142.7 on 24 Jan 1973 45
Kimbolton 300.0 on 31 Jan 2020 191.0 on 28 Feb 1984 38
Youno Downs 126.0 on 16 Jan 2020 97.4 on 23 Jan 2014 36
Ellenbrae 190.8 on 29 Feb 2020 175.0 on 21 Dec 2008 31
Tjukayirla 142.0 on 10 Jan 2020 117.2 on 16 Feb 2001 24
Marble Bar 144.2 on 9 Jan 2020 105.2 on 13 Jan 2018 21



Record highest summer total rainfall
New record
(mm)
Old
record
Years of
record
Average for
summer
Arena 109.4 100.2 in 1989 40 29.7

Highest summer total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
summer
Carnegie 350.1 380.2 in 1966* 119.6
Bryah 190.8 241.1 in 1962* 72.7
Gabbin 144.2 157.4 in 1977* 47.5
Youno Downs 311.8 369.2 in 1996* 130.3

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




Record highest summer temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Eucla 49.8 on 19 Dec 2019 49.3 on 17 Dec 1912 106 25.5
Giles Meteorological Office 46.8 on 25 Dec 2019 45.7 on 16 Jan 2013 64 36.4
Curtin Aero 46.8 on 18 Dec 2019 46.7 on 21 Dec 2018 29 36.8
Forrest 49.5 on 19 Dec 2019 48.4 on 30 Jan 2011 27 32.3
Mount Elizabeth 42.1 on 8 Dec 2019 40.9 on 8 Dec 2009 26 33.1
Fitzroy Crossing Aero 47.4 on 18 Dec 2019 46.7 on 25 Dec 2018 23 37.9
Kalumburu 42.9 on 6 Dec 2019 42.6 on 20 Dec 2018 22 34.3
North Island 39.4 on 13 Dec 2019 38.9 on 21 Feb 2009 20 27.5



Record highest summer mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Eucla 28.3 = 28.3 in 2018 94 25.5
Manjimup 29.2 28.9 in 2012 79 26.4
Bencubbin 35.2 35.0 in 1976 63 33.5
Eyre 29.9 29.3 in 2009 58 26.3
Jarrahwood 31.5 30.8 in 2014 33 29.0
Mount Elizabeth 35.2 34.5 in 2002 25 33.1
Newdegate Research Station 32.5 32.3 in 2009 23 30.4
Busselton Aero 30.7 30.6 in 2010 22 29.4
Lake Grace 32.2 32.1 in 2009 22 30.4
Shannon 27.9 27.7 in 1997 21 25.8
Bridgetown 30.7 30.1 in 2012 20 29.1

Highest summer mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
summer
Ravensthorpe 29.8 30.0 in 1982* 28.1
Kununurra Aero 38.2 38.7 in 1991 36.1

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




Record highest summer daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Broome Airport 30.9 on 1 Dec 2019 30.7 on 24 Dec 2005 81 26.3
Giles Meteorological Office 32.1 on 26 Dec 2019 = 32.1 on 3 Jan 1990 64 22.8
Wagin 26.2 on 7 Feb 2020 25.7 on 19 Feb 2004 48 14.1
Telfer Aero 35.1 on 29 Dec 2019 33.7 on 25 Dec 2018 46 25.7
Troughton Island 30.3 on 28 Dec 2019 = 30.3 on 12 Dec 2017 42 26.7
Warburton Airfield 32.8 on 29 Dec 2019 32.5 on 17 Jan 2013 32 22.2
Curtin Aero 32.9 on 1 Dec 2019 30.5 on 9 Dec 2016 29 24.9
Southern Cross Airfield 28.8 on 8 Feb 2020 27.9 on 4 Jan 2008 24 17.0
Kalumburu 29.7 on 28 Dec 2019 29.3 on 13 Dec 2018 22 24.6
Marble Bar 34.5 on 19 Dec 2019 34.2 on 21 Jan 2008 20 26.2



Record lowest summer temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Warmun 16.0 on 7 Dec 2019 17.0 on 5 Dec 1987 58 24.7



Record highest summer mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Kalgoorlie-Boulder Airport 19.9 19.4 in 1977 77 17.6
Port Hedland Airport 26.6 26.5 in 2004 71 25.1
Merredin 19.0 = 19.0 in 1977 53 17.2
Warburton Airfield 25.1 24.7 in 2014 43 22.2
Troughton Island 27.9 27.6 in 2015 39 26.7
Jandakot Aero 18.0 = 18.0 in 2011 29 16.2
Laverton Aero 22.6 22.4 in 2009 28 20.7
Karratha Aero 27.5 27.4 in 2004 26 26.4
Swanbourne 19.3 = 19.3 in 2011 26 17.8
Argyle Aerodrome 27.3 26.9 in 2018 25 25.7
Bickley 16.2 = 16.2 in 2010 25 15.0
Mount Elizabeth 23.3 22.9 in 2015 24 22.1
Southern Cross Airfield 18.5 18.4 in 2012 23 17.0
Hopetoun North 16.1 15.7 in 2011 21 15.0
Kalumburu 25.6 25.3 in 2018 21 24.6
Norseman Aero 16.5 16.0 in 2010 20 15.3

Highest summer mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
summer
Esperance 16.4 16.5 in 1977 15.4
Bencubbin 19.1 19.6 in 1977* 17.4
Giles Meteorological Office 24.5 24.7 in 1990 22.8
Kununurra Aero 25.8 26.0 in 1991 25.1
Mandora 26.3 26.5 in 1990* 25.0
Curtin Aero 25.9 26.1 in 1993 24.9

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




Record highest summer mean temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Broome Airport 31.2 31.1 in 1987 80 29.8
Bencubbin 27.2 26.9 in 1977 63 25.5
Mardie 32.4 = 32.4 in 2012 62 31.1
Eyre 23.0 22.1 in 1905 58 20.7
Merredin 27.0 26.9 in 2009 53 25.2
Esperance 21.7 = 21.7 in 2009 50 20.5
Pingelly 24.6 = 24.6 in 1977 46 23.1
Hyden 25.5 25.4 in 2012 43 24.0
Warburton Airfield 32.1 32.0 in 2014 43 29.6
Troughton Island 30.5 30.4 in 2015 39 29.4
Mount Elizabeth 29.2 28.5 in 2015 24 27.7
Cunderdin Airfield 26.5 = 26.5 in 2012 23 25.2
Southern Cross Airfield 26.9 26.7 in 2009 23 25.4
York 25.7 = 25.7 in 2012 22 24.5
Shannon 20.5 20.1 in 1999 21 19.1
Wandering 23.6 = 23.6 in 2012 21 22.5
Norseman Aero 25.1 25.0 in 2009 20 23.5

Highest summer mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
summer
Giles Meteorological Office 31.7 31.8 in 1990 29.6
Kununurra Aero 32.0 32.4 in 1991 30.6



Summary statistics for summer 2019-20
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
summer
2019-20
Diff
from
average
Highest for
summer
2019-20
Mean for
summer
2019-20
Diff
from
average
Lowest for
summer
2019-20
Total for
summer
2019-20
Average
for
summer
Rank of
summer
2019-20
Fraction of
summer
average
North Kimberley (district 01)
Doongan 35.0 +1.5 41.3 7 Dec 2019 23.7 +0.9 18.6 10 Dec 2019 301.1 759.2 v low 40%
Kalumburu 36.7 +2.4 42.9 6 Dec 2019 25.6 +1.0 22.8 4 Feb 2020 841.4 865.0 average 97%
Mount Elizabeth 35.2 +2.1 42.1 8 Dec 2019 23.3 +1.2 20.3 18 Feb 2020 657.9 668.3 average 98%
Troughton Island 33.0 +0.9 35.5 28 Dec 2019 27.9 +1.2 23.0 7 Jan 2020 511.0 575.3 average 89%
Truscott 33.9 +1.0 38.9 6 Dec 2019 26.6 +1.0 21.8 4 Feb 2020 697.4 736.9 average 95%
Wyndham Aero 39.1 +2.3 45.5 7 Dec 2019 27.3 +1.0 21.9 24 Dec 2019 484.4 571.0 average 85%
East Kimberley (district 02)
Argyle Aerodrome 39.0 +2.4 44.6 17 Dec 2019 27.3 +1.6 21.3 19 Dec 2019 453.2 473.4 average 96%
Halls Creek Airport 38.0   45.0 18 Dec 2019 25.2   20.8 31 Jan 2020 402.8
Kununurra Aero 38.2 +2.1 44.7 6 Dec 2019 25.8 +0.7 22.2 23 Feb 2020 658.2 571.4 high 115%
Warmun 39.5 +2.3 45.0 17 Dec 2019     16.0 7 Dec 2019 315.6 476.5 low 66%
West Kimberley (district 03)
Bidyadanga 35.8 +1.3 45.0 18 Dec 2019     22.0 20 Jan 2020 281.0 319.3 average 88%
Broome Airport 34.6 +1.2 42.4 2 Dec 2019 27.7 +1.4 22.8 20 Feb 2020 438.0 434.7 average 101%
Curtin Aero 38.1 +1.3 46.8 18 Dec 2019 25.9 +1.0 20.9 6 Dec 2019 450.6 560.3 low 80%
Cygnet Bay 34.8 +0.9 39.6 24 Dec 2019 26.5 +1.0 21.0 7 Jan 2020 730.5 509.5 high 143%
Derby Aero 37.2 +1.5 45.4 18 Dec 2019 27.0 +1.2 21.4 6 Dec 2019 514.2 483.7 average 106%
Fitzroy Crossing Aero 39.6 +1.7 47.4 18 Dec 2019     21.6 26 Jan 2020 285.8 451.7 low 63%
Yampi Sound (Defence) 37.1   45.4 1 Dec 2019 26.0   22.7 18 Feb 2020 589.4
De Grey (district 04)
Bedout Island 34.3 +0.9 37.5 5 Feb 2020 28.3 +1.1 24.1 20 Jan 2020
Karratha Aero 37.0 +1.2 46.2 19 Dec 2019 27.5 +1.1 23.3 2 Dec 2019 311.6 140.3 high 222%
Mandora 37.6 +1.5 46.8 18 Dec 2019 26.3 +1.3 20.1 3 Dec 2019 186.6 224.8 average 83%
Marble Bar 41.0 +0.2 47.8 29 Dec 2019 26.7 +0.5 21.2 19 Jan 2020 352.2 221.7 high 159%
Port Hedland Airport 38.2 +1.8 46.8 25 Dec 2019 26.6 +1.5 20.5 3 Dec 2019 148.4 170.8 average 87%
Fortescue (district 05)
Barrow Island Airport 33.9 +0.9 42.4 27 Dec 2019 26.0 +0.5 22.2 10 Dec 2019 15.2 78.6 average 19%
Karijini North 39.9   47.2 29 Dec 2019 26.3   20.9 15 Dec 2019 216.4
Learmonth Airport 39.1 +1.6 47.9 29 Dec 2019 23.1 +0.4 17.8 4 Jan 2020 0.2 76.4 low 0%
Mardie 38.7 +1.1 47.4 28 Dec 2019 26.2 +1.7 21.0 1 Feb 2020 30.2 109.2 average 28%
Onslow Airport 37.5 +1.3 46.9 30 Dec 2019 25.5 +1.6 20.5 1 Feb 2020 1.4 101.6 low 1%
Thevenard Island 34.3 +1.3 42.7 28 Dec 2019 25.9 +0.8 21.9 3 Dec 2019 5.8 82.7 low 7%
West Gascoyne (district 06)
Carnarvon Airport 31.8 +0.7 42.5 24 Jan 2020 22.9 +0.7 17.4 4 Jan 2020
Murchison 39.6 +1.1 47.0 28 Jan 2020 23.0 +1.0 16.0 4 Jan 2020 31.9 64.9 average 49%
Shark Bay Airport 34.2 +0.5 43.5 2 Feb 2020 21.4 +0.2 16.6 7 Dec 2019 4.4 38.4 average 11%
East Gascoyne (district 07)
Newman Aero 39.2 +0.7 46.0 29 Dec 2019 25.5 +1.1 18.8 2 Dec 2019 266.6 177.2 high 150%
Paraburdoo Aero 40.6 +0.6 46.4 31 Dec 2019 26.0 +0.8 21.3 17 Dec 2019 342.8 162.2 v high 211%
Murchison (district 07A)
Meekatharra Airport 38.3 +1.1 44.6 1 Jan 2020 24.5 +1.0 17.4 11 Feb 2020 109.6 81.0 high 135%
Mount Magnet Aero 38.4 +1.5 44.8 28 Jan 2020 23.4 +0.8 16.0 31 Jan 2020 44.8 79.7 low 56%
Paynes Find 37.7 +1.4 45.4 28 Jan 2020 21.5 +1.3 14.0 4 Jan 2020 83.0 57.2 high 145%
North Coast (district 08)
Dalwallinu 35.9 +1.5 45.5 28 Jan 2020 18.2 +0.8 11.5 4 Jan 2020 76.0 49.7 average 153%
Geraldton Airport 32.2   44.8 3 Feb 2020 18.9   12.1 4 Jan 2020 32.0
Kalbarri 32.5 -0.4 43.6 13 Dec 2019 20.2 +0.9 13.6 31 Jan 2020 22.7 17.2 high 132%
Morawa Airport 37.8 +1.3 45.9 27 Jan 2020 19.9 +0.7 12.7 20 Dec 2019 84.4 55.8 high 151%
Mullewa 37.5 +1.6 45.1 27 Jan 2020 20.0 +1.1 11.2 10 Jan 2020 65.5 40.8 high 161%
North Island 28.1 +0.6 39.4 13 Dec 2019 21.3 +0.3 15.7 7 Dec 2019 36.2 15.3 high 237%
Wongan Hills 35.5 +1.7 45.3 28 Jan 2020 18.1 +0.8 11.5 4 Jan 2020 72.0 40.8 high 176%
Central Coast (district 09)
Badgingarra Research Stn 34.5 +0.7 43.8 27 Jan 2020 17.9 +1.3 9.3 20 Dec 2019 86.4 35.7 v high 242%
Bickley 30.7 +1.0 39.6 15 Dec 2019 16.2 +1.2 8.2 4 Jan 2020 68.6 55.7 high 123%
Garden Island HSF 27.9 +0.9 40.3 4 Feb 2020 19.7 +1.2 12.9 4 Jan 2020 17.4 40.3 average 43%
Gingin Aero 33.5 +1.2 43.9 4 Feb 2020 16.6 +0.7 7.8 31 Jan 2020 30.6 41.3 average 74%
Jandakot Aero 31.9 +1.2 41.6 4 Feb 2020 18.0 +1.8 9.4 31 Jan 2020 14.6 45.4 low 32%
Karnet 30.7 +1.0 39.2 27 Jan 2020     8.3 5 Jan 2020 29.6 57.9 average 51%
Lancelin 29.3 +0.5 42.0 3 Feb 2020 18.1 +0.8 10.0 3 Jan 2020 22.7 32.4 average 70%
Millendon (Swan Valley) 33.4   43.6 4 Feb 2020 17.5   9.4 31 Jan 2020 32.2
Pearce RAAF 34.2 +1.8 44.6 4 Feb 2020 17.6 +1.2 10.1 31 Jan 2020 17.6 32.3 average 54%
Perth Airport 32.8 +1.9 43.3 4 Feb 2020 18.1 +1.6 9.2 31 Jan 2020 22.6 37.0 average 61%
Perth Metro 32.0 +1.3 42.7 4 Feb 2020 18.6 +1.0 12.7 4 Jan 2020 39.8 42.6 average 93%
Rottnest Island 27.3 +1.1 38.6 4 Feb 2020 19.7 +1.0 13.4 4 Jan 2020 11.0 38.2 average 29%
Swanbourne 29.6 +0.3 42.1 4 Feb 2020 19.3 +1.5 12.7 4 Jan 2020 25.6 41.6 average 62%
South Coast (district 09A)
Albany 23.0 +0.5 31.4 15 Dec 2019 16.4 +1.5 9.6 9 Dec 2019 33.4 76.7 low 44%
Albany Airport 25.7   38.4 15 Dec 2019 14.1   4.9 9 Dec 2019 42.0
Bridgetown 30.7 +1.6 39.8 5 Feb 2020 12.7 +0.2 1.5 4 Jan 2020 22.6 46.7 average 48%
Bunbury 30.1 +1.1 38.8 4 Feb 2020 15.6 +0.7 5.3 4 Jan 2020 13.8 35.8 low 39%
Busselton Aero 30.7 +1.3 38.7 14 Dec 2019 14.4 +0.7 5.7 31 Jan 2020 20.8 29.9 average 70%
Cape Leeuwin 24.3 +1.6 35.0 28 Feb 2020 17.7 +1.0 12.5 3 Jan 2020 42.4 53.0 average 80%
Cape Naturaliste 27.8 +2.8 37.3 4 Feb 2020 16.1 +1.2 9.2 4 Jan 2020 39.2 35.6 average 110%
Collie East 31.5 +1.5 40.0 27 Jan 2020 13.5 +0.6 2.8 4 Jan 2020 20.0 50.9 average 39%
Dwellingup 30.9 +2.0 39.9 27 Jan 2020 15.3 +1.5 6.1 4 Jan 2020 44.6 60.0 average 74%
Esperance 27.0 +1.4 41.4 8 Feb 2020 16.4 +1.0 9.4 10 Dec 2019 35.4 71.6 low 49%
Esperance Aero 28.8 +1.7 44.0 28 Jan 2020 15.4 +0.8 8.7 10 Dec 2019 90.0 77.7 average 116%
Hopetoun North 25.4 +0.5 37.6 7 Feb 2020 16.1 +1.1 9.2 10 Dec 2019 20.2 85.7 low 24%
Jarrahwood 31.5 +2.5 40.0 27 Jan 2020 13.0 +0.6 2.0 4 Jan 2020 25.6 46.1 average 56%
Mandurah 29.7 +1.0 40.1 4 Feb 2020 19.7 +1.3 12.0 4 Jan 2020 10.0 45.3 average 22%
Manjimup 29.2 +2.8 39.3 5 Feb 2020 13.5 +0.8 5.9 4 Jan 2020 60.0 63.8 average 94%
North Walpole 25.2 +1.3 37.3 6 Dec 2019 14.3 +0.2 7.8 4 Jan 2020 99.0 94.2 average 105%
Rocky Gully 28.8 +2.0 40.6 6 Feb 2020 12.6 +0.3 3.2 4 Jan 2020 59.2 66.8 average 89%
Shannon 27.9 +2.1 39.2 5 Feb 2020 13.0 +0.5 4.6 4 Jan 2020 88.4 66.6 average 133%
Witchcliffe 27.5 +1.4 37.4 13 Dec 2019 13.9 +0.4 5.9 4 Jan 2020 38.4 40.3 average 95%
North Central (district 10)
Bencubbin 35.2 +1.7 45.1 28 Jan 2020 19.1 +1.7 11.0 4 Jan 2020
Cunderdin Airfield 35.5 +1.5 46.6 28 Jan 2020 17.6 +1.1 10.3 20 Dec 2019 82.4 48.9 high 169%
Merredin 35.0 +1.9 45.4 28 Jan 2020 19.0 +1.8 10.5 1 Dec 2019 44.2 44.6 average 99%
Northam 34.8 +1.4 44.9 28 Jan 2020 17.9 +1.3 10.1 4 Jan 2020 36.8 35.4 average 104%
York 34.9 +1.5 45.5 28 Jan 2020 16.5 +0.9 7.0 4 Jan 2020 45.2 61.8 average 73%
South Central (district 10A)
Beverley 35.3 +1.9 45.2 28 Jan 2020 16.8 +1.0 8.2 4 Jan 2020 44.8 37.7 high 119%
Brookton 33.8 +1.7 43.6 28 Jan 2020 16.1 +1.1 6.7 4 Jan 2020 35.2 39.4 average 89%
Hyden 35.1 +2.2 46.1 28 Jan 2020 15.8 +0.7 5.7 4 Jan 2020 49.0 55.0 average 89%
Jacup 29.4 +2.2 43.4 28 Jan 2020 13.4 +0.7 3.2 4 Jan 2020 63.2 79.9 average 79%
Katanning 30.9 +1.5 41.6 28 Jan 2020 13.8 +0.7 6.0 4 Jan 2020 32.0 62.4 average 51%
Lake Grace 32.2 +1.8 44.6 28 Jan 2020 15.4 +0.6 6.9 4 Jan 2020 35.4 72.2 average 49%
Narembeen 35.1 +2.0 45.5 28 Jan 2020     9.1 1 Dec 2019 48.5 48.7 average 100%
Narrogin 32.0 +1.9 42.4 28 Jan 2020 15.5 +1.8 6.5 4 Jan 2020 43.7 44.3 average 99%
Newdegate Research Station 32.5 +2.1 44.6 28 Jan 2020 13.7 +0.5 4.0 1 Dec 2019 35.6 56.5 average 63%
Pingelly 33.0 +1.8 43.6 28 Jan 2020 16.2 +1.1 7.4 4 Jan 2020 22.2 38.3 average 58%
Ravensthorpe 29.8 +1.7 44.5 28 Jan 2020     8.5 9 Dec 2019 46.0 75.0 average 61%
Wagin 32.0 +1.7 42.0 6 Feb 2020 15.1 +1.0 4.9 4 Jan 2020 45.8 42.6 average 108%
Wandering 32.8 +1.4 42.3 15 Dec 2019 14.5 +0.9 3.9 4 Jan 2020 46.6 50.3 average 93%
Eucla (district 11)
Eucla 28.3 +2.8 49.8 19 Dec 2019 17.0 +0.7 8.0 3 Dec 2019 30.4 54.5 average 56%
Eyre 29.9 +3.6 48.2 2 Jan 2020 16.1 +1.0 4.9 3 Dec 2019 49.2 58.7 average 84%
Forrest 33.8 +1.5 49.5 19 Dec 2019 16.6 +0.6 9.0 3 Dec 2019 33.6 81.0 low 41%
Red Rocks Point 26.8 +1.7 47.7 30 Jan 2020 18.2 +0.3 9.6 3 Dec 2019 25.2 80.8 low 31%
South East (district 12)
Bulga Downs 37.8 +0.9 45.2 29 Jan 2020 22.2 +0.8 14.5 1 Dec 2019
Kalgoorlie-Boulder Airport 34.4 +1.8 44.8 29 Jan 2020 19.9 +2.3 11.7 1 Dec 2019 94.4 75.5 average 125%
Laverton Aero 36.8 +2.3 45.5 29 Dec 2019 22.6 +1.9 13.9 1 Dec 2019 61.8 134.4 low 46%
Leinster Aero 37.4 +1.3 44.9 29 Dec 2019 23.1 +0.9 14.5 1 Dec 2019 86.0 104.4 average 82%
Leonora Aero     45.8 18 Dec 2019 23.4 +1.6 14.9 1 Dec 2019 73.0 104.6 average 70%
Munglinup West 30.0 +1.6 44.3 28 Jan 2020 14.4 +0.4 7.8 4 Jan 2020 64.6 102.6 low 63%
Norseman Aero 33.8 +2.1 45.5 28 Jan 2020 16.5 +1.2 6.9 4 Jan 2020 58.2 82.7 low 70%
Salmon Gums Res.Stn. 31.9 +2.1 46.2 28 Jan 2020 14.4 +1.0 4.0 4 Jan 2020 74.6 70.4 average 106%
Southern Cross Airfield 35.3 +1.5 45.8 28 Jan 2020 18.5 +1.5 10.2 1 Dec 2019 132.6 73.9 high 179%
North East (district 13)
Carnegie 38.5 +0.8 46.2 29 Dec 2019 24.3 +1.3 15.7 5 Jan 2020 350.1 119.6 v high 293%
Giles Meteorological Office 38.9 +2.5 46.8 25 Dec 2019 24.5 +1.7 14.6 1 Dec 2019 80.6 122.9 average 66%
Telfer Aero 41.0 +1.2 47.9 27 Dec 2019 27.3 +1.6 21.3 5 Jan 2020 181.0 209.7 average 86%
Warburton Airfield 39.0 +2.0 46.8 19 Dec 2019 25.1 +2.9 15.4 1 Dec 2019 65.4 98.4 average 66%
Wiluna Aero 37.8   46.7 1 Jan 2020 23.9   15.3 1 Dec 2019 121.4
Offshore Islands (district 200)
Adele Island 32.2   34.8 23 Dec 2019 28.1   23.1 20 Jan 2020
Browse Island 30.9   34.3 19 Dec 2019 28.0   23.7 5 Feb 2020
Varanus Island 32.2 +0.3 39.0 28 Dec 2019 26.4 +0.6 23.7 1 Feb 2020 36.8 85.5 average 43%

Notes

The Seasonal 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 9 am on Tuesday 3 March 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

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