Western Australia in 2021: wet in the west, very warm days in the north

Rainfall in 2021 was above average in the west of Western Australia, the southern Kimberley and the eastern borders of the Southern Interior District, whilst the remainder of the state saw close to average rainfall. Some areas in the Gascoyne and the South West Land Division reported their highest annual rainfall on record. Annual mean maximum temperatures were above average in the far north and south-east, areas surrounding the Gascoyne District, and along the west coast. Annual mean minimum temperatures were above average for much of the southern half and coastal north-west of WA.

Wet in the west

  • Above average rainfall was recorded in the west of WA, the southern Kimberley and the eastern borders of the Southern Interior District, while close to average annual rainfall was observed elsewhere.
  • Western Australia annual rainfall in 2021 was 9% above the 1961–1990 average.
  • Many locations in the Gascoyne District and the South West Land Division (SWLD) recorded their highest annual rainfall on record or highest for at least 20 years.
  • A number of highest all-time daily rainfall records were registered during the first half of the year.
  • Two tropical lows moved across the Kimberley and Pilbara districts and produced daily rainfall in excess of 100 mm in late January; Myroodah in the west Kimberley recorded WA's highest daily total of the year on the 31st with 260.0 mm, and Old Mornington Homestead had its all-time daily rainfall record set on the 30th.
  • March was wet for western and north-eastern WA, and the statewide averaged March rainfall was 40% above the 1961–1990 average
  • A broad trough and a weak low pressure system produced daily rainfall totals between 50 mm and 100 mm in a large part of the SWLD on the 3rd or 4th of March, including a number of all-time daily rainfall records
  • A broad low pressure trough lingered in northern WA, and produce thunderstorms and showers during the middle of March; Flora Valley in the south-east Kimberley recorded its all-time daily rainfall record on the 15th with 177 mm.
  • April was wet in the western parts of the state. Severe tropical cyclone Seroja and its remnants produced widespread moderate rainfall in the west from the North West Cape down to the South Coastal and South East Coastal districts, with locally heavy daily falls in excess of 100 mm on the 12th, including a number of all-time daily rainfall records.
  • The passage of two cloudbands in May resulted in above average rainfall in the west of WA. Locally heavy daily rainfall totals of 80–100 mm were recorded on 3 May around Walpole in the south coast from thunderstorms.
  • Although June rainfall was below average in the Gasocyne, northern Goldfields and much of the SWLD, the southern coastal areas recorded above average rainfall. A strong cold front and associated low pressure system brought widespread moderate rainfall to most of the SWLD on the 21st, with daily rainfall of 166.2 mm recorded at Wereroa, near Denmark in the South Coastal District.
  • The frequent passage of frontal systems saw the SWLD record 50% above July average rainfall, and the wettest July since 1996 for the region.
  • After the state experienced a dry August and September, October rainfall was above average for WA, and the SWLD had their wettest October since 2011.
  • Rainfall in the SWLD during the cool season (April–October) was 13% above the 1961–1990 average, the wettest cool season since 2005.
  • For WA as a whole, November was the ninth-wettest November on record, and wettest since 2012, although it was dry in parts of the south-west.
  • December rainfall was below average for most of WA, with the western half of the state and along the southern coastal areas recorded little to zero rainfall.

Above average daytime temperature in the Kimberley

  • Annual mean maximum temperatures were above average in the far north and south-east, areas surrounding the Gascoyne District, and along the west coast; the reminder of the state saw close to average mean maxima.
  • Western Australia annual mean maximum temperature was 0.67 °C above the 1961–1990 average, but it was the lowest since 2011.
  • Annual mean minimum temperatures were above average for much of the southern half, and coastal north-west of WA.
  • Western Australia annual mean minimum temperature was 0.24 °C above the 1961–1990 average, but it was the lowest since 2012.
  • Western Australia mean temperature in February was the lowest since 2006.
  • On the 30th of March, areas around Esperance in the South East Coastal District had their hottest day and last day of 40 °C or higher in 2021, while Esperance Airport and Munglinup West also had their all-time high daily minimum temperature on record
  • Western Australia mean maximum temperature in June was the lowest since 1993. Much of WA observed a cold spell between the 21st and 25th, with maximum temperatures below 20 °C in the Pilbara, and 10 °C or lower in the Central Wheat Belt, Great Southern and South East Coastal districts on the 21st, including a number of all-time low maximum temperature.
  • Western Australia mean temperature in July was the second-highest on record, and the highest since 1973.
  • In September, the southern WA observed a number of frosty nights, between the 3rd and 5th, and between the 12th and 14th.
  • Western Australia mean temperature in November was the lowest since 2008, but the third-highest on record for December. An extreme heatwave along the north-west and west coast during the Christmas period saw a number of all-time daily maximum temperature, and daily minimum temperature records.

Further information

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Extremes in 2021
Hottest day 47.9 °C at Mardie on 20 Dec
Warmest days on average

36.7 °C at Wyndham Aero

Coolest days on average

20.2 °C at North Walpole
20.2 °C at Shannon

Coldest day 8.7 °C at Jacup on 21 Jun
8.7 °C at Rocky Gully on 10 Aug
Coldest night -4.9 °C at Eyre on 13 Aug
Coolest nights on average 9.0 °C at Bridgetown
9.0 °C at Collie East
Warmest nights on average

26.2 °C at Troughton Island

Warmest night 34.0 °C at Marble Bar on 6 Dec
Warmest on average overall 29.7 °C at Wyndham Aero
Coolest on average overall 15.2 °C at Rocky Gully
15.2 °C at Shannon
Wettest overall 1545.7 mm at Walpole
Wettest day 260.0 mm at Myroodah on 31 Jan
Strongest wind gust 139 km/h at Forrest on 16 Dec

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


Monthly maps
Rainfall rankMaximum temperature rankMinimum temperature rank
January Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
February Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
March Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
April Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
May Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
June Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
July Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
August Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
September Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
October Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
November Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
December Map of Rainfall deciles Map of Decile rank of mean maximum 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 daily rainfall
New record
(mm)
Old
record
Years of
record
McAlinden 94.4 on 12 Apr 85.0 on 20 Jan 2016 77
Wereroa 166.2 on 21 Jun 111.3 on 9 May 1963 62
Kimberley 95.0 on 21 Jun 88.2 on 1 Jun 2012 51
Flora Valley 177.0 on 15 Mar 156.0 on 14 Feb 2001 47
Windy Harbour 78.2 on 3 May 78.0 on 11 Apr 1990 37
Mount Gibson 68.0 on 3 Mar 60.0 on 21 Feb 2008 32
Dalwallinu 77.0 on 3 Mar 63.4 on 30 Jan 2017 25
Barwidgee 84.0 on 17 Feb 80.8 on 20 Feb 1995 24
Wyonning 100.0 on 31 May 58.4 on 23 Mar 2010 22
Tabletop 49.2 on 4 Mar 48.6 on 30 May 2011 21
Tibradden 48.4 on 12 Apr 46.6 on 10 Jun 2012 21
Old Mornington Homestead 147.4 on 30 Jan 119.0 on 30 Jan 2009 20



Record highest annual total rainfall
New record
(mm)
Old
record
Years of
record
Annual
average
Hill Springs 646.1 511.2 in 1999 65 238.4
Windrush 948.1 942.1 in 1978 56 672.1
Tamar 1052.8 1040.8 in 1971 52 752.6
Culford 983.2 892.2 in 1983 44 663.2
Tamaru 971.2 957.6 in 1992 44 691.8
Kimberley 1352.4 1206.6 in 2008 41 996.3
Denbarker 1074.0 1046.0 in 2005 40 774.0
Valern 813.5 785.8 in 2011 40 593.7
Little Grove 1258.8 1159.2 in 1989 38 937.6
Nalyerlup 704.6 675.8 in 2017 36 455.2
Wagerup Refinery 1041.7 1013.5 in 2013 32 844.4
Karawa 516.8 485.2 in 2011 30 337.6
Nunile 713.2 625.6 in 1999 30 437.6
Swanbourne 951.8 873.0 in 1996 25 737.1
Carbarup 704.2 698.1 in 2016 24 515.5
Cunderdin Airfield 431.6 423.4 in 1999 23 305.9
Rocky Gully 1027.6 994.6 in 2005 23 730.1
York 615.3 551.6 in 2017 22 402.5
Moondah Brook 742.0 734.8 in 2003 21 571.8
Peaceful Bay 1277.4 1245.1 in 1996 20 1040.5
Tenindewa 441.0 427.8 in 2008 20 293.9
Wandering 809.2 725.0 in 2011 20 520.5

Highest annual total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Annual
average
Grass Valley 609.0 647.3 in 1917* 399.8
Gascoyne Junction 550.0 550.4 in 1923* 216.5
Northam 638.4 710.9 in 1955* 427.3
Kojonup 732.4 752.5 in 1955* 531.9
Amelup 580.0 590.3 in 1955* 386.0
Jalna 631.0 655.6 in 1964* 463.6
Barracup 529.5 624.8 in 1918* 369.2
Wereroa 1499.4 1550.6 in 1965* 1188.5
Darkan 696.4 748.1 in 1964* 548.7
Jourerdine 466.5 629.8 in 1963* 297.9
Doodenanning 623.2 667.3 in 1968* 425.0
Redmond 1099.0 1286.4 in 1955* 810.0
Walpole 1545.7 1563.4 in 1967* 1311.3
Wubin 515.4 585.9 in 1963* 313.8
Carnarvon Airport 419.6 484.6 in 1975* 222.2
Elena 424.2 477.0 in 1965* 291.1
Wannamal 707.5 724.3 in 1968* 581.8
Marradong 883.0 904.2 in 1974* 718.8
Burekup 1131.4 1338.7 in 1926* 899.9
East Kondut 441.0 474.0 in 1974* 321.0
Cowaramup 1316.6 1331.6 in 1980* 1121.2
Pearce RAAF 787.0 970.0 in 1974* 654.7
Glenrose 565.9 596.9 in 1983* 415.4
Bindoon 942.4 996.4 in 1963* 675.5
Pingaring 435.7 451.3 in 1974* 338.9
Ferguson Valley 1068.2 1122.6 in 1991* 907.0
Ballidu 434.8 482.5 in 1990* 335.9
Bickley 1312.0 1410.3 in 1996 1086.7
Karnet 1306.9 1509.8 in 1991* 1153.5
Marbling 891.8 909.1 in 1992* 756.9
Perth Metro 892.0 904.8 in 1995* 736.8
Karragullen North 1177.2 1189.8 in 1981* 1000.2
Walpole Forestry 1511.3 1518.0 in 1981* 1224.7
Windy Harbour 1328.8 1333.8 in 1988* 1079.9
Beverley 531.4 554.8 in 1999 417.2
Cape Naturaliste 902.6 1107.4 in 1999 798.0
Dwellingup 1335.4 1396.7 in 1996* 1227.1
Serpentine 939.2 1050.5 in 1974* 918.6
Bulyee 429.4 447.0 in 1992* 378.3
Jarrahdale 1231.8 1312.2 in 1992* 1169.7
Kalbarri 434.4 544.4 in 1999* 339.7
Newbicup 773.2 775.2 in 1996* 609.4
Yandanooka 432.7 729.7 in 1999* 403.5
Baramba 866.8 904.7 in 1999* 634.8
Bunbury 963.8 995.6 in 1999* 728.6
Green Grove 621.0 758.6 in 1999* 489.4
Kalannie 480.8 601.5 in 1999* 314.7
New Norcia 644.8 706.2 in 1995* 517.8
Wialki 401.1 407.8 in 2000* 313.5
Wundi 523.6 556.2 in 1999* 391.9

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




Record lowest annual total rainfall
New record
(mm)
Old
record
Years of
record
Annual
average
Gosnells City 350.4 470.4 in 2018 49 795.1
Camballin 0.0 133.7 in 1990 36 570.1
Kimbolton 448.0 613.9 in 1979 25 1068.2

Lowest annual total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Annual
average
Kingston Rest 445.2 392.1 in 1992* 820.4

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




Record highest temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Jurien Bay 46.0 on 25 Dec 45.2 on 31 Jan 1991 53 24.9
Rottnest Island 42.5 on 26 Dec 41.5 on 26 Feb 1997 36 22.3
Busselton Aero 41.4 on 26 Dec 41.0 on 30 Dec 2012 25 23.1



Record lowest daily maximum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Jacup 8.7 on 21 Jun 9.1 on 26 Jul 1998 29 22.1
Newdegate Research Station 9.0 on 21 Jun 9.2 on 1 Jul 2017 26 23.5
Barrow Island Airport 19.1 on 24 Jun = 19.1 on 14 Jul 2006 23 29.4
Roebourne Aero 17.7 on 21 Jun = 17.7 on 10 Jul 2005 21 34.9



Record highest daily minimum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Port Hedland Airport 32.3 on 28 Dec 32.0 on 5 Jan 1978 74 19.6
Rottnest Island 27.0 on 27 Dec 26.4 on 28 Jan 2012 36 15.7
Esperance Aero 26.3 on 30 Mar 26.0 on 24 Feb 1995 31 11.3
Munglinup West 26.5 on 30 Mar 26.3 on 21 Jan 2019 20 10.6



Summary statistics for 2021
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean
for
2021
Diff
from
average
Highest
for
2021
Mean
for
2021
Diff
from
average
Lowest
for
2021
Total
for
2021
Average
annual
total
Rank
of
2021
Fraction
of annual
average
North Kimberley (district 01)
Doongan 33.7 +0.5 40.5 22 Oct 19.1 +0.6 5.8 6 Jul 624.0 1088.3 v low 57%
Troughton Island 31.8 +0.6 35.5 1 Dec 26.2 +0.7 21.4 13 Jul 1058.4 819.7 high 129%
Truscott 33.2 +0.4 39.0 20 Oct 23.2 +0.1 15.1 12 Jun 1162.6 1113.4 average 104%
Wyndham Aero 36.7 +0.6 45.1 21 Oct 22.6 +0.3 10.2 12 Jun 681.8 835.3 low 82%
East Kimberley (district 02)
Argyle Aerodrome 35.7 +0.8 43.9 2 Dec 22.9 +0.6 11.0 6 Jul 798.0 734.3 average 109%
Halls Creek Airport 33.8   44.5 17 Dec 18.3   2.9 6 Jul 691.4
Kununurra Aero 35.7 +0.6 44.0 21 Oct 20.7 -0.4 8.3 12 Jun 698.4 836.1 low 84%
Warmun 35.6 +0.5 45.0 5 Dec     7.0 5 Jul 745.1 721.5 average 103%
West Kimberley (district 03)
Broome Airport 32.9 +0.6 41.6 24 Oct 21.9 +0.6 9.6 10 Aug 338.9 623.5 low 54%
Curtin Aero 35.9 +0.3 44.3 4 Dec 21.2 +0.2 9.7 7 Jul 689.4 808.2 average 85%
Derby Aero 35.4 +0.7 43.6 23 Oct 21.4 -0.1 9.1 5 Jul 735.8 704.4 average 104%
Fitzroy Crossing Aero 36.4 +0.1 45.8 17 Dec 20.1 -0.1 6.6 18 Aug 760.4 678.7 high 112%
Yampi Sound (Defence) 36.2   44.6 23 Oct 19.7   6.0 4 Jul
De Grey (district 04)
Bedout Island 30.0 -0.4 38.6 28 Dec 24.5 0.0 15.9 24 Jun
Karratha Aero 32.5 0.0 45.3 11 Dec 21.3 +0.4 8.2 24 Jun 294.4 297.5 average 99%
Port Hedland Airport 33.9 +0.5 47.4 19 Dec 20.5 +0.9 6.9 24 Jun 204.0 317.7 average 64%
Roebourne Aero 34.6 -0.3 47.1 14 Jan 19.8 0.0 7.4 23 Jun 385.6 289.2 high 133%
Fortescue (district 05)
Barrow Island Airport 29.3 -0.1 39.9 11 Jan 22.4 +0.1 12.8 25 Jun 385.8 274.8 high 140%
Karijini North 33.1   45.2 19 Dec 19.6   4.2 3 Aug 392.6
Learmonth Airport 31.8 -0.2 46.5 20 Dec 17.7 0.0 5.2 25 Jun 288.6 251.5 high 115%
Mardie 33.8 -0.2 47.9 20 Dec 19.7 +0.8 6.0 23 Jun 388.6 276.3 high 141%
Onslow Airport 32.5 +0.4 46.7 15 Jan 20.3 +1.1 8.3 23 Jun 283.2 303.8 average 93%
Thevenard Island 30.2 +0.3 41.8 11 Jan 22.2 +0.4 11.8 26 Jun 206.2 224.4 average 92%
West Gascoyne (district 06)
Denham 27.2 +0.4 44.0 28 Dec     11.0 4 Jun 332.6 222.3 high 150%
Shark Bay Airport 29.1 0.0 46.2 24 Dec 16.5 +0.1 4.5 26 Jun 284.8 201.3 high 141%
East Gascoyne (district 07)
Newman Aero 31.7 -0.5 44.2 22 Dec 16.4 -0.1 -0.1 12 Aug 297.0 324.4 average 92%
Murchison (district 07A)
Meekatharra Airport 29.6 +0.5 43.2 13 Jan 16.4 +0.4 1.3 24 Jun 150.0 233.7 low 64%
Mount Magnet Aero 28.4 -0.4 43.2 22 Jan 15.2 -0.1 2.1 2 Aug 291.2 246.6 average 118%
Paynes Find 27.4 -0.6 42.8 22 Jan 13.0 0.0 -0.7 26 Jun 502.2 289.3 v high 174%
North Coast (district 08)
Dalwallinu 25.7 -0.7 42.4 25 Dec 11.6 -0.1 0.4 3 Sep 528.8 297.8 v high 178%
Geraldton Airport 27.1 +0.1 47.3 25 Dec 14.1 +0.3 3.1 4 Sep 453.6
Kalbarri 27.9 +0.1 46.5 25 Dec     3.6 24 Jun 434.4 339.7 high 128%
Mullewa 28.2 +0.2 44.7 25 Dec 13.8 +0.5 2.4 3 Sep 403.7 332.6 high 121%
North Island 25.1 +0.3 36.7 25 Dec 18.8 +0.2 7.9 20 Jun 414.0 277.4 v high 149%
Wongan Hills 25.8 0.0 42.9 26 Dec 11.7 -0.3 0.6 3 Sep 427.6 387.1 high 110%
Central Coast (district 09)
Badgingarra Research Stn 25.5 -0.4 43.5 26 Dec 12.7 +0.7 1.3 3 Sep
Bickley 22.3 -0.3 40.3 26 Dec 11.6 +0.3 3.6 22 Jun 1312.0 1086.7 high 121%
Garden Island HSF 22.9 +0.2 42.5 26 Dec 14.9 -0.1 6.0 2 Aug 833.2 610.4 v high 137%
Gingin Aero 25.6 0.0 44.5 25 Dec 11.3 +0.3 -2.4 26 Jun
Jandakot Aero 24.8 +0.2 43.3 26 Dec 12.4 +0.8 0.1 22 Jun 922.6 818.4 high 113%
Jurien Bay 25.5 +0.6 46.0 25 Dec 13.7 +0.6 3.0 7 Jun
Millendon (Swan Valley) 25.5   42.9 26 Dec 12.4   0.4 26 Jun 752.2
Pearce RAAF 25.7 +0.4 43.3 25 Dec 12.8 +0.6 1.4 22 Jun 787.0 654.7 high 120%
Perth Airport 25.3 +0.7 43.3 26 Dec 12.7 +0.5 0.5 22 Jun 798.8 760.9 average 105%
Perth Metro 25.0 +0.2 43.5 26 Dec 13.2 +0.3 1.1 26 Jun 892.0 736.8 v high 121%
Rottnest Island 22.7 +0.4 42.5 26 Dec 15.8 +0.1 7.2 2 Aug 660.6 567.7 high 116%
Swanbourne 23.7 -0.4 43.7 26 Dec 14.3 +0.3 5.1 22 Jun 951.8 737.1 highest 129%
South Coast (district 09A)
Albany 19.7 +0.2 31.5 16 Mar 12.9 +1.1 5.6 31 Jul
Albany Airport 20.7 -0.3 37.3 8 Jan 11.0 +0.3 2.7 7 Aug 1130.4
Bridgetown     39.1 28 Dec 9.0 +0.4 -1.3 18 Jun 945.2 738.9 high 128%
Bunbury 23.0 -0.2 38.0 27 Dec 11.6 +0.5 0.7 24 Jun 963.8 728.6 v high 132%
Busselton Aero 22.8 -0.3 41.4 26 Dec 10.8 +0.5 1.3 6 Oct 787.0 685.4 high 115%
Cape Leeuwin 20.6 +0.8 38.1 27 Dec 14.7 +0.6 7.9 2 Aug 950.2 954.6 average 100%
Cape Naturaliste 22.2 +1.4 38.5 26 Dec 13.1 +0.4 5.8 6 Oct 902.6 798.0 high 113%
Collie East 22.9 -0.3 39.8 26 Dec 9.0 +0.5 -0.8 18 Jun 930.0 735.1 v high 127%
Donnybrook 23.5 +0.3 40.5 28 Dec     2.1 6 Oct 1022.5 969.8 average 105%
Dwellingup 22.6 +0.7 41.5 26 Dec 10.2 +0.6 0.1 26 Jun 1335.4 1227.1 high 109%
Esperance 21.9 0.0 41.8 30 Mar 12.2 +0.1 4.8 31 Jul 646.4 618.7 average 104%
Esperance Aero 22.3 0.0 40.9 30 Mar 11.2 -0.1 3.0 3 Sep 592.8 569.0 average 104%
Hopetoun North 21.5 -0.6 42.2 30 Mar 11.9 +0.3 2.0 21 Sep 521.6 484.4 average 108%
Jarrahwood 22.9 +0.2 40.0 28 Dec 9.1 +0.5 -0.5 6 Aug 953.6 930.3 average 103%
Mandurah     41.0 26 Dec 14.9 +0.1 6.5 2 Aug 678.4 649.2 average 104%
North Walpole 20.2 -0.1 38.0 8 Jan 11.8 +0.1 2.9 6 Oct
Rocky Gully 20.5 -0.4 39.6 9 Jan 9.9 +0.3 1.6 6 Oct 1027.6 730.1 highest 141%
Shannon 20.2 -0.2 39.1 8 Jan 10.2 +0.5 2.2 6 Oct 1265.4 1024.7 high 123%
Windy Harbour 20.4 +0.2 37.5 8 Jan 11.4 0.0 4.1 16 Aug 1328.8 1079.9 v high 123%
North Central (district 10)
Bencubbin     41.0 26 Dec 11.9 +0.2 -0.1 3 Sep
Cunderdin Airfield 25.7 -0.4 42.5 9 Jan 10.6 +0.1 -1.0 3 Sep 431.6 305.9 highest 141%
Merredin 25.3 +0.1 41.1 30 Dec 11.8 +0.3 -1.0 26 Jun 342.0 325.5 average 105%
Northam 25.3 -0.1 43.5 9 Jan     -1.1 26 Jun 638.4 427.3 v high 149%
York 25.3 -0.4 43.0 9 Jan 10.0 +0.4 -1.0 26 Jun 615.3 402.5 highest 153%
South Central (district 10A)
Beverley 25.7 +0.2 43.3 28 Dec 10.6 +0.3 -1.0 26 Jun 531.4 417.2 high 127%
Brookton 24.3 0.0 41.3 9 Jan 10.0 +0.2 -1.2 26 Jun 494.4 448.3 high 110%
Hyden 25.0 -0.2 44.0 9 Jan     -1.5 11 Aug 395.5 340.2 high 116%
Jacup 21.8 -0.3 41.1 9 Jan 9.5 +0.2 0.6 10 Oct 600.4 448.7 v high 134%
Katanning 21.8 -0.7 40.9 9 Jan 9.7 +0.1 1.0 10 Oct 532.6 450.0 high 118%
Lake Grace 23.1 -0.5 41.0 16 Feb 10.5 +0.1 0.7 3 Sep 399.6 332.6 high 120%
Narrogin 22.8 +0.3 40.2 9 Jan 10.0 +0.6 -0.1 25 Jun 573.5 491.9 high 117%
Newdegate Research Station 22.9 -0.6 41.1 9 Jan     -1.2 10 Oct 420.6 366.4 high 115%
Pingelly 23.6 +0.1 40.6 9 Jan     0.0 3 Sep 493.2 443.9 high 111%
Ravensthorpe 22.5 -0.3 41.0 9 Jan     2.5 3 Sep
Wagin 22.7 -0.3 40.0 29 Dec 10.2 +0.4 1.1 25 Jun 560.3 430.8 v high 130%
Eucla (district 11)
Eyre 24.0 +0.9 42.4 10 Jan 9.9 -0.8 -4.9 13 Aug 257.3 315.2 low 82%
South East (district 12)
Bulga Downs 28.3 -0.6 42.5 9 Jan 13.2 -0.4 -1.0 2 Aug 301.6 234.8 high 128%
Kalgoorlie-Boulder Airport 25.4 0.0 41.7 10 Dec 12.2 +0.4 -0.4 3 Sep 316.6 265.6 high 119%
Laverton Aero 27.4 +0.2 43.3 21 Jan 14.0 -0.1 0.8 11 Jul 146.0 281.3 low 52%
Leinster Aero 28.2 -0.1 43.2 10 Jan 14.5 -0.2 0.6 3 Aug 215.2 251.6 average 86%
Leonora Aero 27.7 -0.6 44.1 22 Jan 14.3 -0.2 -0.1 25 Jun 186.2 249.3 low 75%
Norseman Aero 24.9 -0.3 41.4 16 Dec 10.2 +0.2 -1.9 4 Sep 252.0 286.8 average 88%
Salmon Gums Res.Stn. 23.9 +0.4 41.4 23 Jan 9.1 0.0 -3.1 24 Aug 385.2 354.6 average 109%
Southern Cross Airfield 25.7 -0.2 41.9 9 Jan 11.0 +0.5 -3.0 26 Jun 309.2 301.3 average 103%
North East (district 13)
Giles Meteorological Office 29.3 -0.2 43.8 18 Dec 15.2 -0.7 1.2 3 Aug
Warburton Airfield 29.5 -0.5 43.9 3 Dec 15.0 0.0 -0.7 16 Jun 265.2 244.2 average 109%
Wiluna Aero 29.7   43.0 10 Jan 14.9   -0.2 23 Jun 157.6
Offshore Islands (district 200)
Adele Island 30.5   33.6 15 Dec     21.0 9 Mar
Rowley Shoals 28.5   33.7 10 Jan 26.4   19.9 25 Jun
Varanus Island 28.9 -0.2 37.6 18 Jan     16.2 22 Jun 225.6 223.4 average 101%

Notes

The Annual climate summary, generally published on the second working day of the year, 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 5 pm on Monday 7 February 2022. 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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Climate