Western Australia in July 2021: very warm days in the Kimberley; wet in the south-west

Mean maximum temperatures were above average for most of Western Australia except in the south-west. Mean minimum temperatures were above average across most of the state. For WA as a whole, it was the eighth-highest July mean maximum temperature on record, and the fourth-highest July mean minimum temperature on record. Rainfall was above average for much of the South West Land Division (SWLD) and adjacent southern Goldfields, while rainfall was close to average or below average for the reminder of the state.

Wet in the south-west WA

  • July rainfall was 7% above 1961–90 average, and it was the wettest July since 2016 for Western Australia.
  • For southwestern Western Australia (south-west of a line between Jurien Bay and Brember Bay), July rainfall was 55% above 1961–90 average, and the wettest July since 1996.
  • For the SWLD (roughly south-west of a line between Geraldton and Esperance), July rainfall was 50% above 1961–90 average, and the wettest July since 1996.
  • Many sites in the SWLD had their wettest July on record, or their wettest July in decades, including several sites with 50 to 140 years of record.
  • A cut-off low pressure system and associated cloudband produced widespread moderate rainfall in a large area from southern Gascoyne to much of the SWLD on the 21st and 22nd; a number of sites in the Great Southern District had their highest July daily rainfall on record on the 21st.
  • A pair of strong cold fronts produced widespread moderate rainfall to much of the SWLD on the 27th, and heavier falls to 60-80 mm were recorded along and just south of the Perth hills; several sites had their highest July daily rainfall on record.
  • It was exceptionally wet in the Perth hills with a number of sites recorded July totals in excess of 400 mm; 459.2 mm at Bickley was the highest of the month in the state, and it was also its annual highest monthly rainfall in 53 years of record.
  • Wagin (in the Great Southern District) recorded 148.3 mm in total, which was its fourth-wettest July on record, and the wettest July since 1958
  • Katanning (south of Wagin) recorded 135.6 mm in total, which was town's equal third-wettest July on record, the wettest July for the town since 1958 with records commencing in 1891.
  • Wandering (north-west of Wagin) recorded 227.4 mm in total, which was town's fourth-wettest July on record, the wettest July for the town since 1958 with records commencing in 1887.

Warmer daytime and night-time temperatures for most of WA

  • The Western Australia mean temperature for July was 1.60 °C above 1961–90 average, which was the third-warmest July on record.
  • Mean maximum temperatures were above average for most of the state away from the south-west where mean maxima were close to average.
  • The mean maximum temperature was 1.67 °C above 1961–90 average, the equal eighth-highest July mean maximum temperatures on record for Western Australia.
  • The mean minimum temperature was 1.52 °C above 1961–90 average, the fourth-highest July mean minimum temperatures on record, and highest since 1996 for Western Australia.
  • Days were exceptionally warm in the north and east Kimberley in late July, resulting in a number of July highest daily temperature records, and warmest July days on record.
  • A maximum temperature of 38.1 °C was recorded on the 24th at Kalumburu, and on the 29th and 30th at Wyndham Airport, which is the country's second-highest July temperatures on record, behind 38.3 °C at Kalumburu on 24 July 2016.
  • Mean minimum temperatures were above average across almost the entire state, and it was particularly warm in the west; several sites in the SWLD had their warmest July nights on record, or warmest for at least 20 years.

Multiple severe weather events with damaging winds, heavy rainfall and flooding in the south-west of the state including Perth

  • Frequent passage of a dozen or so cold fronts and a cut-off low during July resulted in multiple notable severe weather events of damaging winds, heavy rainfall, flash flooding reported in Perth and the south-west of the state.
  • Damaging wind gusts in excess of 90 km/h were recorded in 13 of 31 days in the coastal locations of the south-west or in the Perth Hills. Cape Leeuwen recorded a destructive gust of 134 km/h on the 27th, which is its highest gust since 22 September 2013 (143 km/h).
  • Heavy rainfall and strong winds caused flash flooding, damage in houses and properties across Perth and further south. There were close to 800 call outs to the DEFS for assistance for July.
  • Water flooded the Ballagin Road in Piesseville, north of Wagin in the Great Southern District on the 28th, with the occupant of an abandoned vehicle was unaccountable.
  • Over 20,000 properties with majority in Perth, lost power on the 26th and 27th.
  • River levels in the Swan River and Avon River catchments peaked between 1–4 meters during July, which was their highest river level in winter since August 1996, although, the peak level at York (east of Perth) was the highest in any month since August 1998.

Further information

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Extremes in July 2021
Hottest day 38.1 °C at Kalumburu on the 24th
38.1 °C at Wyndham Aero on the 29th
38.1 °C at Wyndham Aero on the 30th
Warmest days on average 34.6 °C at Kalumburu
Coolest days on average 14.1 °C at Rocky Gully
14.1 °C at Shannon
Coldest day 10.1 °C at Rocky Gully on the 30th
Coldest night -4.8 °C at Eyre on the 12th
Coolest nights on average 5.5 °C at Balladonia
Warmest nights on average 23.2 °C at Troughton Island
Warmest night 24.9 °C at Troughton Island on the 29th
24.9 °C at Troughton Island on the 31st
Warmest on average overall 26.3 °C at Troughton Island
Coolest on average overall 10.5 °C at Newdegate Research Station
Wettest overall 459.2 mm at Bickley
Wettest day 81.0 mm at Mount William on the 27th
Strongest wind gust 135 km/h at Cape Leeuwin on the 27th

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 July daily rainfall
New record
(mm)
Old
record
Years of
record
Dumbleyung 45.0 on the 27th 42.2 on the 29th in 1987 111
Pingrup 39.0 on the 27th 34.5 on the 24th in 1960 93
Wokalup 72.2 on the 12th 63.6 on the 24th in 2013 70
Newdegate Research Station 32.4 on the 21st 32.0 on the 20th in 1991 66
Maria 44.2 on the 21st 34.0 on the 8th in 1983 53
Huntly 77.0 on the 27th 60.8 on the 22nd in 2004 32
Katanning 33.4 on the 27th 26.8 on the 5th in 2019 23
Wandering 46.8 on the 21st 46.0 on the 30th in 2001 23
Anketell 67.2 on the 27th 53.4 on the 5th in 2019 20



Record highest July total rainfall
New record
(mm)
Old
record
Years of
record
Average for
July
Corrigin 146.9 140.2 in 1946 112 59.8
Dumbleyung 129.5 124.2 in 1939 110 57.4
Pingrup 127.6 108.7 in 1960 91 48.4
Glenrose 133.9 133.1 in 1958 71 62.0
Pearce RAAF 247.0 242.6 in 1995 67 134.5
Chesalon 96.9 89.1 in 2008 56 46.0
Roleystone 391.9 381.1 in 1964 54 201.2
Bickley 459.2 364.4 in 2000 53 219.7
Culford 297.4 255.0 in 1996 52 129.4
Maria 129.7 92.4 in 1973 52 46.5
Mordetta 112.3 87.0 in 1974 50 49.3
Karragullen North 418.2 414.3 in 1964 48 205.6
Jandakot Aero 315.0 284.6 in 1974 47 174.7
Maida Vale 290.8 278.2 in 1978 39 162.2
Pinjarra Refinery 285.7 273.2 in 2000 37 158.8
Wagerup Refinery 283.5 265.4 in 1995 36 159.0
Huntly 430.2 381.9 in 2000 29 230.8
Swanbourne 285.4 240.0 in 1995 28 152.0
Jacup 98.2 95.0 in 2008 27 51.3
Woodridge Estate 230.0 213.2 in 2001 26 126.1
York 156.4 137.4 in 1996 26 73.6
Cunderdin Airfield 102.0 83.4 in 1999 25 51.0
Dalwallinu 114.4 97.4 in 2008 25 50.6
Lake Grace 88.0 82.6 in 2008 25 38.1
Gingin Aero 245.4 213.6 in 2008 24 129.1
Morawa Airport 101.8 81.8 in 2018 24 45.7
Rocky Gully 192.0 181.4 in 2008 24 107.7
Shannon 302.0 278.8 in 2008 23 183.1
Wandering 227.4 154.6 in 2007 23 99.0
Katanning 135.6 105.0 in 2008 22 64.6
Caljie 135.7 97.8 in 2008 21 62.1
Moondah Brook 225.6 159.8 in 2008 21 111.0
Pinjarra South 218.2 184.6 in 2003 21 127.2
Quadney 164.4 117.0 in 2008 21 74.0
Toodyay East 154.2 136.0 in 2008 21 74.3
Yangedine 143.6 108.0 in 2011 21 63.1
Anketell 346.7 233.4 in 2008 20 160.5
Arradale 131.4 125.2 in 2008 20 66.1
Henty Brook 230.0 200.2 in 2007 20 145.3
South Holmwood Alert 98.6 90.6 in 2008 20 48.7
Tenindewa 117.4 96.8 in 2008 20 51.6
Werribee 263.6 157.6 in 2018 20 115.1

Highest July total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
July
Beverley 166.6 216.1 in 1958 77.2
Kukerin 125.2 148.8 in 1958 57.9
Maybrook 166.4 186.3 in 1958 79.5
Perth Airport 251.2 446.7 in 1958 155.5
Pingelly 176.4 222.6 in 1958 81.3
Wagin 148.3 171.7 in 1958 70.1
Cherry Tree 131.6 153.9 in 1958* 72.2
Newdegate Research Station 100.4 104.0 in 1958* 48.2
Quairading 128.9 167.8 in 1958* 62.0
Ardath 112.6 162.0 in 1958* 52.0
Badgebup 130.5 134.8 in 1958* 58.0
Jarrahdale 443.8 520.9 in 1958* 226.9
Nyabing 123.2 146.5 in 1958* 59.9
Telenning Hill 118.8 136.8 in 1958* 56.5
Colorado 129.4 139.5 in 1964 60.8
Darkan 191.8 203.7 in 1964 98.3
Redlands 181.0 198.5 in 1964 94.4
Northam 151.5 172.5 in 1964* 82.0
Chidlow 336.2 340.9 in 1964* 177.8
Bruce Rock 87.5 107.1 in 1964* 48.4
Gidgegannup 304.2 408.8 in 1964* 179.8
Bulyee 140.2 145.2 in 1964* 63.4
Kojonolokan Hills 132.6 137.2 in 1964* 61.9
Yealering 135.2 135.7 in 1964* 60.3
Northcliffe 331.2 338.2 in 1974* 234.1
Dwellingup 412.6 445.0 in 1974* 234.9
Wokalup 305.9 342.7 in 1974* 183.0
Gingin 217.9 226.8 in 1975* 145.8
Nyerilup 89.6 109.5 in 1978 50.6
Ongerup 93.8 146.8 in 1978 49.4
Jerramungup 97.7 147.6 in 1978* 51.1
Brookton 152.1 155.4 in 1978* 84.7
Serpentine 312.4 316.8 in 1964* 180.5
Albany 214.9 239.4 in 1991 143.1
Muresk Institute 146.1 187.2 in 1964* 86.9
Chillinup 74.2 98.4 in 1991* 44.2
Kojonup 142.2 =142.2 in 1990* 86.4
Nalyerlup 105.2 135.3 in 1991* 55.0
Amelup 90.6 93.0 in 1991* 53.8
Denbarker 163.2 173.2 in 1991* 109.6
Tamar 158.0 240.4 in 1991* 105.7
Barberton 147.2 163.0 in 1995 83.6
Bolgart 119.8 149.0 in 1995 85.5
Doongin Peak 90.3 93.7 in 1995 53.4
Hyden North 85.7 92.0 in 1995 49.2
Kimberley 223.2 244.0 in 1991* 155.3
Konnongorring 95.8 137.0 in 1995 63.4
Perth Metro 271.4 278.6 in 1995 146.8
Tammin 91.0 91.8 in 1995 55.8
Bungulla 86.1 95.5 in 1995* 49.3
Canna 104.0 150.4 in 1996 58.7
Carnamah 104.4 104.8 in 1996 66.8
Chamingup 145.8 151.3 in 1996 89.0
Coodernuppin 72.2 72.4 in 1996 44.0
Eradu 118.8 181.2 in 1996 70.2
Jaroma 113.6 134.3 in 1995* 64.1
Karnet 329.4 339.6 in 1996 219.0
Koorda 80.9 87.4 in 1995* 45.9
Narrogin 163.7 164.9 in 1996 86.1
New Norcia 158.8 213.4 in 1995* 96.3
Newbicup 139.4 237.0 in 1996 104.1
Nindethana Farm 85.4 137.2 in 1996 44.9
Ninghan Station 82.6 123.1 in 1996 42.1
South Holmwood 102.4 139.4 in 1996 61.9
Strawberry 146.8 167.2 in 1996 81.3
Tambellup 89.2 95.0 in 1996 65.3
Three Springs 115.6 138.9 in 1996 69.8
Valern 206.9 213.0 in 1996 103.0
Wickepin 115.8 121.8 in 1996 68.8
Wundi 133.8 174.0 in 1996 74.2
Yuna 108.1 140.0 in 1996 63.9
Badgingarra Research Stn 183.8 203.2 in 1995* 102.6
Bowgada 107.8 128.2 in 1996* 61.0
Denmark 212.5 234.2 in 1996* 170.0
Manjimup 248.4 289.0 in 1996* 174.3
Mindalla 97.3 111.6 in 1995* 61.5
Nabawa 126.2 184.3 in 1996* 90.6
Williams 181.3 183.7 in 1996* 96.1
Boscabel 132.2 147.8 in 1996* 84.9
Mindarabin 88.4 =88.4 in 1996* 51.1
Worsley Downs 359.8 366.4 in 1974* 210.5
Bunbury 199.8 263.6 in 2000 142.4
Collie 257.0 299.8 in 2000 176.0
Cranham 116.2 121.8 in 2000 77.0
Wereroa 254.2 256.8 in 2000 177.1
Kalbarri 119.2 157.6 in 2001 70.2
Perenjori 100.0 111.4 in 1996* 51.2
Waeel 103.6 122.9 in 1932* 61.6

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




Record highest July temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Warmun 37.2 on the 23rd 36.5 on the 18th in 1996 60 29.6
Kununurra Aero 37.0 on the 29th 36.5 on the 26th in 2015 35 30.8
Doongan 35.0 on the 23rd 34.6 on the 30th in 2010 31 29.8
Argyle Aerodrome 37.0 on the 23rd 36.1 on the 16th in 1995 28 30.0
Paraburdoo Aero 32.8 on the 20th 32.5 on the 23rd in 2002 26 25.0
Wyndham Aero 38.1 on the 30th 37.3 on the 24th in 2016 21 32.1



Record highest July mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Warmun 32.2 32.0 in 1975 59 29.6
Kununurra Aero 33.0 = 33.0 in 2017 34 30.8
Carnegie 24.1 = 24.1 in 2002 31 21.5
Doongan 31.8 31.7 in 1990 30 29.8
Argyle Aerodrome 32.3 32.1 in 2017 27 30.0
Fitzroy Crossing Aero 32.9 32.8 in 2017 23 31.0
Kalumburu 34.6 34.4 in 2017 22 32.4
Wyndham Aero 34.2 = 34.2 in 2017 20 32.1



Record highest July daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Newman Aero 18.4 on the 13th 17.8 on the 8th in 2009 25 6.5
Garden Island HSF 17.3 on the 26th 17.0 on the 4th in 2002 20 11.3
Mandurah 16.7 on the 26th 16.4 on the 31st in 2015 20 10.7



Record highest July mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Salmon Gums Res.Stn. 6.7 6.6 in 1985 83 4.6
Jandakot Aero 10.1 9.7 in 2017 31 7.0
Perth Metro 10.6 = 10.6 in 1996 27 7.9
Swanbourne 11.8 11.6 in 2007 27 9.8
Bunbury 10.1 9.8 in 2007 25 7.1
Newdegate Research Station 6.4 6.2 in 2007 25 4.2
Cunderdin Airfield 7.8 7.1 in 2011 24 4.7
York 7.3 6.6 in 2011 24 3.8
Bridgetown 6.6 6.5 in 2014 23 4.6
Shannon 7.8 7.7 in 2014 22 6.6

Highest July mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
July
Northam 8.5 8.6 in 1921* 5.4
Narrogin 7.0 7.6 in 1949* 5.2
Manjimup 7.7 7.8 in 1994 6.4
Beverley 7.7 7.9 in 1996 5.1
Gingin Aero 9.1 12.1 in 1996 6.4
Merredin 7.3 7.7 in 1996 5.6
Perth Airport 10.2 10.5 in 1996 8.0
Thevenard Island 18.3 19.7 in 1996* 17.4
Wandering 6.3 6.5 in 2000 4.1

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




Record highest July mean temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Carnegie 15.9 15.3 in 2007 31 13.7
York 12.2 12.0 in 2007 24 10.5



Summary statistics for July 2021
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
July
2021
Diff
from
average
Highest for
July
2021
Mean for
July
2021
Diff
from
average
Lowest for
July
2021
Total for
July
2021
Average
for
July
Rank of
July
2021
Fraction of
July
average
North Kimberley (district 01)
Doongan 31.8 +2.0 35.0 23rd 12.2 +1.4 5.8 6th 0 0.6 lowest 0%
Kalumburu 34.6 +2.2 38.1 24th 14.3 +0.4 9.7 6th 0 1.4 lowest 0%
Troughton Island 29.5 +1.2 31.0 18th 23.2 +0.9 21.4 13th 0.8 2.6 high 31%
Truscott 32.6 +1.7 35.7 29th 18.8 +0.4 15.3 7th 0.6 1.8 high 33%
Wyndham Aero 34.2 +2.1 38.1 30th 16.1 +0.8 11.9 5th 0 2.4 lowest 0%
East Kimberley (district 02)
Argyle Aerodrome 32.3 +2.3 37.0 23rd 17.4 +1.5 11.0 6th 0 1.3 lowest 0%
Halls Creek Airport 30.0   33.9 29th 10.5   2.9 6th 0
Kununurra Aero 33.0 +2.2 37.0 29th 13.4 -1.5 8.7 6th 0 1.4 lowest 0%
Warmun 32.2 +2.6 37.2 23rd 14.0 +1.2 7.0 5th 0 5.1 lowest 0%
West Kimberley (district 03)
Bidyadanga 30.3 +0.6 35.0 19th 14.4 +0.3 10.0 8th 2.0 8.0 average 25%
Broome Airport 29.4 +0.4 33.2 26th 15.1 +1.4 10.0 7th 1.0 6.5 average 15%
Curtin Aero 32.3 +1.2 34.6 22nd 16.5 +1.1 9.7 7th 0 7.3 lowest 0%
Cygnet Bay 28.9 +0.7 31.0 21st 16.9 +2.1 11.5 6th 0 10.2 lowest 0%
Derby Aero 32.3 +1.4 34.7 12th 15.3 +0.6 9.1 5th 0 7.5 lowest 0%
Fitzroy Crossing Aero 32.9 +1.9 36.4 26th 13.6 +1.4 6.9 7th 0 5.2 lowest 0%
Yampi Sound (Defence) 33.3   35.9 26th 12.7   6.0 4th 0.2
De Grey (district 04)
Bedout Island 25.5 +0.4 26.6 30th 20.9 +1.2 18.6 10th
Karratha Aero 27.6 +1.2 32.3 23rd 15.5 +1.6 11.4 9th 0 14.3 lowest 0%
Legendre Island 25.6 +0.7 27.4 23rd 19.5 +1.3 16.9 9th
Mandora 30.3 +1.2 34.5 20th 13.7 +1.2 8.6 7th 0.8 8.5 average 9%
Marble Bar 29.0 +1.4 34.1 21st 13.2 +1.0 8.9 17th 0 13.5 lowest 0%
Port Hedland Airport 29.5 +2.2 33.5 21st 14.6 +2.1 9.6 18th 0.2 10.3 low 2%
Roebourne Aero 29.0 +1.0 32.7 23rd 13.8 +1.6 9.4 9th 0 10.7 lowest 0%
Fortescue (district 05)
Barrow Island Airport 24.6 +0.8 28.9 12th 18.1 +0.5 14.8 9th 2.0 13.8 average 14%
Karijini North 26.7   32.4 21st 12.7   8.1 17th 0
Learmonth Airport 25.6 +1.2 29.2 21st 13.0 +1.5 8.3 17th 4.6 21.5 average 21%
Mardie 28.3 +0.5 31.6 19th 13.9 +2.0 10.2 8th 1.0 13.7 average 7%
Onslow Airport 26.8 +1.3 29.4 25th 15.5 +2.4 11.2 9th 1.6 19.2 average 8%
Thevenard Island 25.8 +0.8 28.0 21st 18.3 +0.9 14.0 19th 1.0 16.5 low 6%
West Gascoyne (district 06)
Carnarvon Airport 22.9 +0.4 28.1 3rd 12.6 +1.7 7.6 9th 40.2 42.7 average 94%
Denham 21.9 +0.1 26.0 3rd 14.8 +2.1 11.5 2nd 30.1 39.2 average 77%
Emu Creek Station 26.2 +0.7 31.0 19th 12.9 +1.6 9.0 10th 13.8 21.4 average 64%
Murchison 21.3 +0.1 25.0 2nd 8.5 +2.1 3.5 3rd 27.6 27.4 average 101%
Shark Bay Airport 22.6 -0.2 26.5 3rd 12.2 +1.6 8.1 9th 35.0 30.4 average 115%
East Gascoyne (district 07)
Newman Aero 24.5 +1.3 30.8 20th 8.5 +2.0 2.3 9th 0 14.1 lowest 0%
Paraburdoo Aero 25.6 +0.6 32.8 20th 11.4 +1.5 7.2 17th 2.4 13.4 average 18%
Murchison (district 07A)
Meekatharra Airport 20.0 +0.8 25.5 20th 8.9 +1.5 4.9 8th 19.4 20.4 average 95%
Mount Magnet Aero 18.7 -0.4 23.6 26th 9.3 +2.2 4.3 1st 30.0 26.7 high 112%
Paynes Find 17.6 -1.0 20.8 3rd 7.8 +2.3 1.4 1st 65.0 35.1 high 185%
North Coast (district 08)
Dalwallinu 16.3 -0.7 18.4 29th 7.6 +1.7 1.3 1st 114.4 50.6 highest 226%
Geraldton Airport 19.7 -0.9 22.0 12th 11.5 +2.1 5.8 2nd 115.4 68.6 high 168%
Kalbarri 21.3 -0.6 22.9 27th 12.3 +2.6 7.1 2nd 119.2 70.2 high 170%
Morawa Airport 18.2 -0.6 20.9 3rd 8.4 +2.3 1.7 1st 101.8 45.7 highest 223%
Mullewa 18.7 -0.2 22.5 2nd 8.6 +1.5 4.6 26th 90.4 59.1 high 153%
North Island 21.2 0.0 22.8 26th 15.4 0.0 9.2 18th 105.6 66.3 high 159%
Wongan Hills 16.9 -0.2 19.0 3rd 8.4 +1.8 4.3 2nd 109.2 69.4 v high 157%
Central Coast (district 09)
Badgingarra Research Stn 17.1 -0.5 20.1 3rd 9.2 +1.9 6.5 26th 183.8 102.6 v high 179%
Bickley 14.6 -0.5 17.3 3rd 8.7 +1.4 5.1 31st 459.2 219.7 highest 209%
Garden Island HSF 18.0 +0.1 20.5 3rd 12.8 +1.5 8.7 3rd 239.6 122.9 v high 195%
Gingin Aero 18.0 -0.4 20.8 12th 9.1 +2.7 3.2 3rd 245.4 129.1 highest 190%
Jandakot Aero 18.1 +0.1 21.3 12th 10.1 +3.1 3.4 3rd 315.0 174.7 highest 180%
Jurien Bay 19.8 +0.2 23.1 3rd 11.6 +2.2 5.0 30th 120.4 111.6 average 108%
Millendon (Swan Valley) 18.3   21.1 12th 9.7   5.1 3rd 248.8
Pearce RAAF 18.0 +0.1 20.8 12th 10.2 +1.8 5.4 22nd 247.0 134.5 highest 184%
Perth Airport 18.3 +0.3 21.4 12th 10.2 +2.2 5.0 22nd 251.2 155.5 v high 162%
Perth Metro 18.3 -0.2 21.7 12th 10.6 +2.7 4.4 3rd 271.4 146.8 v high 185%
Rottnest Island 18.3 +0.5 20.6 12th 13.1 +0.7 10.1 31st 166.6 112.8 v high 148%
Swanbourne 18.0 -0.4 20.7 3rd 11.8 +2.0 8.2 3rd 285.4 152.0 highest 188%
South Coast (district 09A)
Albany 16.0 +0.2 21.0 26th 9.5 +1.3 5.6 31st 214.9 143.1 v high 150%
Albany Airport 15.9   20.5 26th 8.4   2.9 2nd 181.8 111.3 v high 163%
Bridgetown 15.5 -0.3 18.8 26th 6.6 +2.0 2.1 31st 198.0 130.9 v high 151%
Bunbury 17.2 -0.1 19.8 12th 10.1 +3.0 4.4 10th 199.8 142.4 high 140%
Busselton Aero 16.8 0.0 19.6 26th 8.8 +1.9 4.3 2nd 177.0 133.8 high 132%
Cape Leeuwin 17.0 +0.6 19.1 3rd 12.0 +0.7 8.9 30th 177.4 179.2 average 99%
Cape Naturaliste 17.3 +0.9 19.8 1st 11.1 +0.6 6.1 31st 167.8 159.2 average 105%
Collie East 15.8 -0.5 18.8 1st 6.7 +2.7 2.3 10th 257.2 134.1 v high 192%
Donnybrook 16.8 +0.2 20.0 26th       207.3 186.1 average 111%
Dwellingup 15.1 0.0 18.0 3rd 7.8 +2.3 2.6 3rd 412.6 234.9 v high 176%
Esperance 17.4 +0.2 20.9 29th 9.0 +0.6 4.8 31st 101.8 95.7 average 106%
Esperance Aero 15.9 -0.6 18.7 29th 8.0 +0.4 3.7 31st 76.6 76.8 average 100%
Hopetoun North 17.5 -0.6 20.6 29th 9.2 +1.4 5.0 12th 60.4 66.3 average 91%
Jarrahwood 16.2 -0.3 19.0 3rd 6.6 +1.7 2.0 11th 195.8 179.6 high 109%
Mandurah 17.5 0.0 19.6 12th 12.2 +1.5 8.0 31st        
Manjimup 14.4 0.0 18.7 26th 7.7 +1.3 3.6 31st 248.4 174.3 high 143%
North Walpole 15.5 -0.5 19.0 26th 9.2 +0.2 4.8 2nd 270.2 185.8 high 145%
Rocky Gully 14.1 -0.6 18.7 26th 7.2 +0.7 3.2 31st 192.0 107.7 highest 178%
Shannon 14.1 -0.7 18.0 26th 7.8 +1.2 4.1 31st 302.0 183.1 highest 165%
Windy Harbour 16.5 -0.3 19.4 26th 9.3 +0.7 4.4 2nd 236.6 197.7 high 120%
Witchcliffe 16.4 0.0 19.3 26th 9.8 +1.6 4.3 2nd 228.0 194.1 average 117%
North Central (district 10)
Bencubbin 16.1 -0.4 19.1 29th 7.9 +1.9 2.4 3rd 63.8 45.2 high 141%
Cunderdin Airfield 16.9 -0.2 19.1 29th 7.8 +3.1 1.6 3rd 102.0 51.0 highest 200%
Merredin 16.1 -0.3 18.4 18th 7.3 +1.7 1.0 1st 61.0 50.2 high 122%
Northam 17.1 +0.2 20.5 12th 8.5 +3.1 1.5 3rd 151.5 82.0 v high 185%
York 17.2 +0.1 19.5 29th 7.3 +3.5 1.2 3rd 156.4 73.6 highest 213%
South Central (district 10A)
Beverley 16.8 -0.1 19.2 29th 7.7 +2.6 1.6 3rd 166.6 77.2 v high 216%
Brookton 16.0 -0.1 18.8 12th 6.3 +1.8 1.4 3rd 152.1 84.7 v high 180%
Hyden 16.3 -0.2 20.0 4th     4.0 10th 54.7 47.7 average 115%
Jacup 15.0 -0.8 18.1 29th 6.7 +1.1 2.6 11th 98.2 51.3 highest 191%
Katanning 14.2 -0.6 17.1 29th 7.0 +1.0 2.5 31st 135.6 64.6 highest 210%
Lake Grace 15.0 -0.7 18.0 29th 6.8 +1.4 1.3 11th 88.0 38.1 highest 231%
Narrogin 15.0 +0.4 17.8 29th 7.0 +1.8 2.3 11th 163.7 86.1 v high 190%
Newdegate Research Station 14.6 -0.7 17.4 29th 6.4 +2.2 0.5 11th 100.4 48.2 v high 208%
Pingelly 15.6 +0.2 18.2 25th 7.1 +1.6 1.2 28th 176.4 81.3 v high 217%
Ravensthorpe 16.0 -0.4 19.2 4th 7.5 +0.7 3.0 31st 71.7 47.2 high 152%
Wagin 15.2 -0.2 18.3 26th 7.2 +1.6 3.4 3rd 148.3 70.1 v high 212%
Wandering 15.4 -0.4 18.5 12th 6.3 +2.2 0.5 3rd 227.4 99.0 highest 230%
Eucla (district 11)
Balladonia 18.0 +0.3 22.0 29th 5.5 +0.7 1.4 12th 20.3 20.4 average 100%
Eucla 19.5 +1.5 25.9 7th 8.2 +1.1 1.6 12th 20.4 24.8 average 82%
Eyre 19.5 +1.2 24.6 29th 6.2 +0.6 -4.8 12th 30.8 34.2 average 90%
Forrest 19.3 +0.4 25.2 7th 6.7 +1.7 0.3 12th 14.0 14.2 average 99%
South East (district 12)
Bulga Downs 18.8 -0.7 24.0 26th 6.5 +1.7 1.2 11th 33.2 23.4 high 142%
Kalgoorlie-Boulder Airport 16.9 +0.1 20.2 26th 6.9 +1.8 1.0 1st 30.8 24.2 high 127%
Laverton Aero 19.0 +0.4 24.6 26th 7.2 +1.3 0.8 11th 13.8 15.1 average 91%
Leinster Aero 19.4 +0.4 25.6 26th 7.9 +1.8 3.9 9th 10.6 15.8 average 67%
Leonora Aero 18.9 -0.4 24.0 26th 7.3 +1.4 2.1 11th 26.4 15.8 high 167%
Norseman Aero 16.7 -0.7 20.5 29th 6.1 +2.1 0.1 11th 19.8 21.4 average 93%
Salmon Gums Res.Stn. 16.0 -0.1 18.6 13th 6.7 +2.1 -0.6 3rd 57.8 36.5 high 158%
Southern Cross Airfield 16.6 -0.1 19.7 18th 6.1 +2.5 -1.5 1st 47.6 35.2 high 135%
North East (district 13)
Carnegie 24.1 +2.6 31.1 21st 7.8 +1.8 1.4 9th 0.8 11.5 average 7%
Giles Meteorological Office 22.3 +2.1 28.7 13th 8.4 +1.5 2.8 17th 3.0 10.5 average 29%
Telfer Aero 27.3 +1.8 33.2 21st 13.0 +2.3 7.4 7th 0 11.2 lowest 0%
Warburton Airfield 22.4 +1.5 30.4 21st 7.0 +1.2 0.8 9th 2.2 11.8 average 19%
Wiluna Aero 21.0   28.0 20th 7.3   2.0 3rd 5.6
Offshore Islands (district 200)
Adele Island 28.2   29.6 2nd 23.8   21.1 6th
Rowley Shoals 26.0   28.0 20th 24.3   22.6 17th
Varanus Island 24.9 +0.5 28.3 12th 20.4 +0.5 18.8 31st 1.4 12.3 high 11%

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 5 pm on Sunday 1 August 2021. 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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