Western Australia in May 2025

Rainfall

  • Rainfall totals in May were below to very much below average for most of the west and south of WA, whilst rainfall was above to very much above average for the Kimberley and the Northern Interior districts.
  • Western Australia's area-averaged rainfall total in May was 20.0 mm, 24% below the 1961–1990 average.
  • May 2025 was wetter than May 2024 (15.1 mm) and May 2023 (3.0 mm) for WA.
  • A cloudband brought widespread significant daily rainfall of 50–100 mm in the Kimberley on 27 and 28 May. Several sites had their highest May daily rainfall on record.
  • As a result of falls on the 27th, and 28th, Nicholson and Parry Creek Farm in the eastern Kimberley had their wettest May on record. Several sites including Broome Airport had their wettest May for more than 20 years.

Temperature

  • Mean maximum temperatures were above to very much above average for the western half and southern WA, and with mean maximum temperatures the highest on record in the west Gascoyne region.
  • The Kimberley, east Pilbara and Northern Interior recorded close to average mean maximum temperatures.
  • Western Australia's area-averaged mean maximum temperature was 27.0 °C, 1.84 °C above the 1961–1990 average, and the eighth-warmest May on record for all Mays since 1910.
  • May 2025 was cooler than May 2024 (+2.35 °C), but warmer than May 2023 (+0.55 °C).
  • Mean minimum temperatures were close to average for most of WA, with pockets of below average or above average mean minimum temperature scattered around the state.
  • Western Australia's area-averaged mean minimum temperature was 13.1 °C, 0.42 °C above the 1961–1990 average.
  • May 2025 was cooler than May 2024 (+1.06 °C) but warmer than May 2023 (-1.38 °C).
  • Western Australia's area-averaged mean temperature was 20.1 °C, 1.13 °C above the 1961–1990 average.
  • Daily maximum temperatures were 8–12 °C above the 1961-1990 average near the west coast between 7 and 9 May, with maxima reaching the mid to high 30s in the west Pilbara and the west Gascoyne. Many sites had their hottest May day on record.
  • Carnarvon Airport recorded 6 hot days (a record in May) with maximum temperatures at 35 °C or higher, including 3 consecutive days between 7th and 9th, leading to Carnarvon having its warmest May on record, and exceeding its previous record by 1.3 °C.
  • Some sites in the Gascoyne and Central West had their highest May mean maximum temperature on record, or highest May mean maximum temperature for at least 20 years.

Extremes in May 2025
Hottest day 38.2 °C at Carnarvon Airport on the 7th
Warmest days on average 33.1 °C at Mardie
Coolest days on average 19.4 °C at Shannon
Coldest day 12.0 °C at Rocky Gully on the 23rd
Coldest night -2.0 °C at Newdegate Research Station on the 28th
Coolest nights on average 4.9 °C at Bridgetown
Warmest nights on average 26.8 °C at Rowley Shoals
Warmest night 28.6 °C at Rowley Shoals on the 1st
28.6 °C at Rowley Shoals on the 6th
28.6 °C at Rowley Shoals on the 7th
Warmest on average overall 28.5 °C at Troughton Island
Coolest on average overall 13.2 °C at Bridgetown
Wettest overall 148.0 mm at Port Smith
Wettest day 111.6 mm at Kalumburu on the 28th
Strongest wind gust 106.0 km/h at Manjimup on the 26th
106.0 km/h at Manjimup on the 21st

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 May daily rainfall
New record
(mm)
Old
record
Years of
record
Average for
May
Nicholson 62.0 on the 28th 52.6 on 21 May 1968 87 8.8
Udialla 76.0 on the 27th 74.0 on 05 May 2016 67 18.3
Yulmbu 77.4 on the 27th 67.3 on 05 May 1960 57 17.5
Mount Hart Station 55.0 on the 27th =55.0 on 14 May 1979 46 21.6
Wyndham Aero 54.8 on the 28th 53.4 on 31 May 2024 42 12.5
Argyle Aerodrome 59.8 on the 28th 38.4 on 28 May 2010 40 7.5
Kilto Station 87.0 on the 27th 85.0 on 10 May 1997 39 23.9
Lansdowne 50.4 on the 27th 47.2 on 20 May 1968 38 9.7
Drysdale River Station 61.0 on the 27th 42.8 on 18 May 1995 38 11.8
Doongan 72.0 on the 28th 39.0 on 31 May 2024 38 12.3
Kalumburu 111.6 on the 28th 70.0 on 16 May 2010 27 14.7
Liveringa Station 75.6 on the 27th 72.0 on 27 May 2020 25 20.2
Parry Creek Farm 62.0 on the 28th 45.0 on 31 May 2024 23 10.1
Mount Winifred 46.0 on the 27th 27.4 on 05 May 2016 22 11.9
Old Mornington Homestead 46.0 on the 27th 35.2 on 16 May 2010 21 14.7



Record highest May total rainfall
New record
(mm)
Old
record
Years of
record
Average for
May
Nicholson 135.0 95.6 in 1968 86 8.8
Parry Creek Farm 63.8 46.8 in 2010 22 10.1



Highest May total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
May
Yulmbu 85.6 102.3 in 1964 18.7
Flora Valley 98.0 105.0 in 1979 12.5
Port Smith 148.0 160.0 in 1988 28.2
Billiluna 45.6 66.6 in 1997 12.9
Kilto Station 97.0 222.0 in 1997 25.8
Broome Airport 123.0 268.2 in 1997 28.2
Mount Amhurst 61.6 160.2 in 2004 15.0

note: there may be gaps in the historical record at some sites, so it is possible more recent higher values have gone unreported




Record highest May temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Carnarvon Airport 38.2 on the 7th 37.1 on 06 May 2010 78 26.4
Dwellingup 30.6 on the 9th 29.0 on 01 May 2003 69 18.6
Kalbarri 36.8 on the 7th 36.2 on 01 May 2003 55 26.2
Rottnest Island 29.2 on the 9th =29.2 on 02 May 2003 37 21.2
Jandakot Aero 33.4 on the 9th =33.4 on 01 May 2002 35 22.1
Swanbourne 32.2 on the 9th 31.5 on 01 May 2003 32 22.2
Rocky Gully 29.3 on the 9th 29.1 on 03 May 2020 30 18.6
York 33.8 on the 9th 33.5 on 12 May 2018 30 22.0
Bridgetown 29.7 on the 9th 29.3 on 12 May 2018 28 19.6
Wandering 31.2 on the 9th 30.1 on 12 May 2018 27 20.1
Varanus Island 33.4 on the 6th 33.0 on 01 May 2013 27 28.0
Shark Bay Airport 37.0 on the 8th =37.0 on 05 May 2010 25 27.5
North Island 32.2 on the 8th 30.4 on 02 May 2024 25 24.5
Gooseberry Hill 33.8 on the 9th 33.0 on 01 May 2002 25 21.2
Garden Island HSF 31.2 on the 9th 31.0 on 01 May 2002 24 21.5
Collie East 30.6 on the 9th 28.7 on 02 May 2003 23 20.2
North Walpole 29.0 on the 9th 28.3 on 12 May 2018 22 19.2



Record highest May mean maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Carnarvon Airport 31.1 29.8 in 2024 78 26.4
Kalbarri 29.3 29.1 in 2024 52 26.2
Morawa Airport 26.4 26.2 in 2024 29 24.1
Shark Bay Airport 30.3 29.3 in 2012 25 27.5



Highest May mean maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
May
Mullewa 27.3 27.4 in 1994 23.9

note: there may be gaps in the historical record at some sites, so it is possible more recent higher values have gone unreported




Record highest May daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Windy Harbour 19.0 on the 10th 18.6 on 02 May 2005 39 10.7



Highest May mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
May
Thevenard Island 26.0 26.2 in 2002 25.0
York 15.3 16.3 in 2005 14.5
Shark Bay Airport 22.7 22.8 in 2005 21.1
Carnarvon Airport 22.7 22.8 in 2005 20.6

note: there may be gaps in the historical record at some sites, so it is possible more recent higher values have gone unreported





Summary statistics for May 2025
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2025
Diff
from
average
Highest for
May
2025
Mean for
May
2025
Diff
from
average
Lowest for
May
2025
Total for
May
2025
Average
for
May
Rank of
May
2025
Fraction of
May
average
North Kimberley (district 01)
Doongan 30.4 -0.9 33.7 25th 15.4 +0.6 9.1 20th 93.3 13.5 high 691%
Kalumburu 32.2 -1.4 35.0 25th 18.8 +1.8 12.5 20th 129.2 14.7 high 879%
Troughton Island 31.5 +0.3 34.3 7th 25.6 +0.1 22.5 28th 0.0 35.7 lowest 0%
Truscott 31.0 -1.1 33.4 13th 21.1 -0.3 16.7 20th 0.0 18.7 lowest 0%
Wyndham Aero 32.7 -1.4 36.8 25th 20.2 +1.1 14.4 19th 68.2 12.5 high 546%
East Kimberley (district 02)
Argyle Aerodrome 30.8 -1.3 35.5 5th 18.9 -0.2 13.0 19th 72.6 7.5 high 968%
Halls Creek Airport 29.7 34.2 5th 16.7 12.9 31st 43.6
Kununurra Aero 31.4 -1.5 34.5 12th 18.9 +0.4 13.4 20th 42.2 6.6 high 639%
West Kimberley (district 03)
Bidyadanga 32.7 +0.2 38.2 8th 19.1 +0.6 13.0 27th 26.0 24.9 high 104%
Broome Airport 31.8 +0.1 36.9 6th 18.0 -0.3 12.5 20th 123.0 27.0 high 456%
Curtin Aero 31.7 -1.6 36.1 6th 19.0 -0.1 14.2 22nd 53.8 14.8 high 364%
Cygnet Bay 29.8 -1.2 33.0 10th 20.4 +1.1 16.0 20th 30.1 38.8 high 78%
Derby Aero 31.9 -1.1 36.6 5th 18.5 -0.3 12.5 22nd 50.4 19.2 high 262%
Fitzroy Crossing Aero 32.1 -1.2 37.2 5th 16.7 +0.7 9.3 20th 47.0 14.3 high 329%
Yampi Sound (Defence) 32.8 36.5 6th 16.5 9.2 20th 57.4
De Grey (district 04)
Bedout Island 26.4 -2.4 29.7 14th 22.3 -1.5 19.9 26th
Karratha Aero 30.6 +0.6 35.7 6th 17.9 -0.4 11.5 23rd 0.0 31.0 lowest 0%
Legendre Island 29.1 +0.7 32.8 6th 22.8 +0.7 18.3 23rd
Mandora 32.6 +0.3 37.9 5th 17.4 +0.4 9.0 24th 27.4 25.1 high 109%
Marble Bar 30.9 -0.2 35.7 5th 17.0 0.0 11.1 22nd 0.0 13.4 lowest 0%
Pardoo Station 33.8 +1.9 35.1 13th 17.0 -0.1 12.5 21st
Port Hedland Airport 31.8 +1.0 35.7 5th 17.2 -0.2 10.0 23rd 1.2 27.0 average 4%
Roebourne Aero 32.0 +0.4 37.3 5th 16.7 -0.1 9.5 25th 0.0 39.1 lowest 0%
Fortescue (district 05)
Barrow Island Airport 28.6 +1.1 32.7 6th 21.3 0.0 16.3 22nd 7.8 58.2 average 13%
Karijini North 29.5 33.9 6th 16.8 10.0 23rd 0.8
Learmonth Airport 30.6 +2.0 35.7 6th 16.1 +0.1 10.2 22nd 53.0 41.2 average 129%
Mardie 33.1 +1.6 37.4 7th 17.5 +0.5 9.8 25th 6.0 38.2 average 16%
Onslow Airport 31.8 +2.4 36.6 5th 18.6 +1.1 11.3 23rd 6.0 50.7 low 12%
Thevenard Island 30.1 +1.3 33.6 7th 21.9 +0.7 18.3 17th 3.4 46.7 average 7%
West Gascoyne (district 06)
Carnarvon Airport 31.1 +4.7 38.2 7th 14.4 -0.4 7.2 22nd 10.0 32.7 average 31%
Gascoyne Junction 30.8 +3.0 36.0 7th 12.9 -1.0 4.9 23rd 0.0 27.6 lowest 0%
Murchison 28.3 +2.1 34.0 10th 8.4 -2.7 3.0 26th 5.6 16.8 average 33%
Shark Bay Airport 30.3 +2.8 37.0 8th 15.2 +0.6 9.4 22nd 8.0 23.1 average 35%
East Gascoyne (district 07)
Newman Aero 27.5 +0.4 32.8 5th 10.5 -1.3 2.7 22nd 3.2 18.2 average 18%
Paraburdoo Aero 30.2 +1.1 34.8 5th 14.5 -0.3 7.7 24th 0.0 18.8 lowest 0%
Murchison (district 07A)
Meekatharra Airport 26.8 +2.9 31.6 5th 12.9 +0.8 4.1 23rd 5.6 21.5 average 26%
Mount Magnet Aero 26.1 +2.1 31.7 10th 12.0 +0.4 3.7 25th 2.6 16.5 average 16%
Paynes Find 26.3 +3.0 33.0 10th 9.3 -0.1 1.4 24th 30.6 34.5 average 89%
North Coast (district 08)
Carnamah 28.8 +6.0 35.0 11th 11.0 +0.2 5.0 26th 37.0 49.1 average 75%
Dalwallinu 24.4 +2.1 32.7 9th 9.7 0.0 3.3 24th 14.6 33.6 average 44%
Geraldton Airport 28.2 +2.7 36.6 9th 13.1 +0.7 8.4 25th 38.6 35.9 average 108%
Kalbarri 29.3 +3.1 36.8 7th 14.7 +1.3 9.1 25th 32.5 52.2 average 62%
Morawa Airport 26.4 +2.3 34.3 9th 10.5 +0.1 3.4 25th 20.8 34.6 average 60%
Mullewa 27.3 +3.4 34.2 9th 12.6 +1.3 4.5 25th 11.6 45.1 low 26%
North Island 26.2 +1.7 32.2 8th 19.7 +1.2 13.6 19th 23.6 39.5 average 60%
Wongan Hills 24.2 +2.5 33.0 9th 10.6 +0.7 3.4 24th 36.4 50.6 average 72%
Central Coast (district 09)
Badgingarra Research Stn 24.7 +2.1 34.1 9th 12.0 +1.3 6.3 24th 21.6 66.2 low 33%
Bickley 21.3 +2.0 30.6 9th 10.7 +0.5 4.8 27th 73.2 129.1 low 57%
Garden Island HSF 23.3 +1.8 31.2 9th 14.0 +0.1 10.2 26th 52.2 74.6 low 70%
Gingin Aero 24.6 +1.8 34.1 9th 9.8 +0.8 2.2 22nd 40.8 72.2 low 56%
Jandakot Aero 24.2 +2.1 33.4 9th 10.1 +0.6 2.5 20th 54.6 103.9 low 53%
Jurien Bay 25.6 +2.2 32.0 8th 11.9 +0.1 6.0 22nd 36.2 74.1 low 49%
Karnet 21.7 +2.4 30.4 9th 10.4 +1.3 3.4 24th 56.3 137.5 v low 41%
Lancelin (Defence) 25.1 33.8 9th 13.4 8.2 24th 46.2
Millendon (Swan Valley) 25.1 34.4 9th 11.1 3.9 26th 45.6
Pearce RAAF 25.0 +2.9 34.9 9th 12.2 +1.5 5.1 26th 36.2 82.4 low 44%
Perth Airport 24.8 +2.9 34.0 9th 11.1 +0.7 3.4 26th 53.6 96.4 low 56%
Perth Metro 24.3 +1.9 33.8 9th 11.2 +0.7 4.2 26th 62.4 86.2 low 72%
Rottnest Island 22.9 +1.7 29.2 9th 16.2 +0.9 11.6 26th 61.8 70.2 average 88%
Swanbourne 24.0 +1.8 32.2 9th 13.5 +0.9 7.0 26th 67.4 87.2 average 77%
South Coast (district 09A)
Albany 20.5 +1.8 29.0 9th 11.8 +1.0 7.2 24th 72.0 114.3 low 63%
Albany Airport 20.8 +1.1 28.5 9th 9.2 -0.2 3.4 21st 46.2 81.6 low 57%
Bridgetown 21.1 +1.5 29.7 9th 4.9 -1.9 -0.7 21st 32.6 95.1 v low 34%
Bunbury 22.4 +1.4 27.8 9th 9.2 -0.1 2.3 20th 31.4 100.0 v low 31%
Busselton Aero 21.5 +1.0 25.4 9th 8.5 -0.5 2.4 20th 44.4 97.7 low 45%
Cape Leeuwin 21.0 +1.8 25.9 9th 14.8 +1.0 9.6 27th 32.8 134.9 v low 24%
Cape Naturaliste 21.7 +2.4 26.4 9th 13.5 +0.9 8.1 26th 44.8 113.2 v low 40%
Collie East 21.7 +1.5 30.6 9th 5.4 -0.7 -1.0 24th 38.4 92.1 low 42%
Donnybrook 22.0 +1.9 28.7 8th 9.4 +1.2 2.7 26th 44.4 132.8 v low 33%
Dwellingup 21.7 +3.1 30.6 9th 8.3 +0.5 1.1 26th 56.6 154.5 v low 37%
Esperance 22.2 +1.7 29.4 2nd 12.5 +1.4 7.8 21st 69.0 69.7 average 99%
Esperance Aero 21.2 +0.9 27.7 9th 11.0 +0.5 6.2 24th 26.0 63.4 v low 41%
Hopetoun North 21.8 +0.8 30.4 9th 11.1 +0.7 4.3 29th 30.0 43.9 low 68%
Jarrahwood 21.6 +1.5 28.0 9th 5.9 -0.9 -1.0 21st 39.4 121.5 v low 32%
Mandurah 22.2 +1.0 25.7 8th 14.0 +0.5 8.4 26th 40.0 83.0 v low 48%
Manjimup 19.5 +1.7 28.7 9th 9.8 +0.9 5.2 24th 56.0 126.9 v low 44%
Mount Barker 20.2 +2.3 28.5 11th 10.0 +1.2 4.5 26th 21.6 81.1 v low 27%
North Walpole 20.1 +0.9 29.0 9th 11.6 +0.3 6.6 24th 100.0 116.6 low 86%
Rocky Gully 19.5 +0.9 29.3 9th 8.9 -0.3 2.8 24th 63.4 76.3 average 83%
Shannon 19.5 +1.3 28.0 9th 9.5 +0.6 5.4 24th 79.0 116.6 low 68%
Windy Harbour 20.6 +0.7 25.5 9th 10.0 -0.7 2.8 20th 60.0 144.2 lowest 42%
Witchcliffe West 20.4 27.2 9th 10.3 5.0 27th 58.0
North Central (district 10)
Bencubbin 24.6 +3.7 31.0 9th 10.8 +1.6 3.0 24th 5.0 35.8 v low 14%
Cunderdin Airfield 23.9 +1.9 32.6 9th 8.0 -0.1 0.3 24th 14.8 30.2 low 49%
Goomalling 24.9 +2.7 33.0 11th 10.1 +0.7 2.5 26th 8.4 46.6 v low 18%
Kellerberrin 23.7 +2.8 31.5 11th 7.2 -0.9 0.0 26th 14.2 40.4 low 35%
Merredin 23.8 +2.9 30.6 9th 10.2 +1.3 0.0 24th 18.9 40.0 low 47%
Northam 23.9 +2.6 33.1 9th 8.0 -0.4 2.0 24th 15.2 54.4 low 28%
York 24.4 +2.4 33.8 9th 6.2 -0.7 -1.2 24th 21.1 45.8 low 46%
South Central (district 10A)
Beverley 23.9 +2.4 32.2 9th 7.8 0.0 0.0 24th 18.5 52.9 low 35%
Brookton 23.3 +2.8 31.4 9th 7.6 -0.1 -1.3 24th 17.1 55.9 low 31%
Corrigin 23.0 +3.2 30.0 11th 6.8 -0.7 1.5 20th 9.5 45.8 low 21%
Hyden 22.7 +1.8 30.0 9th 7.7 +0.2 1.0 26th 13.0 38.6 low 34%
Jacup 20.9 +1.2 28.9 9th 8.2 -0.2 1.9 24th 0.0 34.2 lowest 0%
Katanning 20.7 +1.4 29.5 9th 8.8 +0.2 3.9 24th 13.2 46.9 v low 28%
Lake Grace 21.6 +1.5 29.2 9th 8.4 -0.2 1.6 26th 9.4 30.8 low 30%
Narrogin 21.9 +3.2 30.4 9th 8.1 +0.3 0.6 26th 16.6 61.7 v low 27%
Newdegate Research Station 21.6 +1.6 28.9 9th 5.9 -1.1 -2.0 28th 9.8 41.2 v low 24%
Ongerup 22.1 +3.0 30.1 9th 7.8 -0.7 0.2 24th 7.1 42.6 v low 17%
Pingelly 22.6 +2.8 30.6 9th 9.1 +0.4 1.8 26th 18.6 57.0 v low 33%
Ravensthorpe 21.2 +1.1 28.3 9th 9.8 +0.1 3.6 24th 8.1 43.3 v low 19%
Wagin 21.2 +1.7 30.0 9th 7.7 -0.3 2.0 20th 10.2 53.4 v low 19%
Wandering 22.0 +1.9 31.2 9th 5.5 -0.7 -1.5 24th 24.6 56.4 low 44%
Eucla (district 11)
Eucla 22.1 +1.0 31.5 4th 10.0 -0.6 4.3 25th 16.6 30.6 low 54%
Eyre 23.2 +1.7 30.8 10th 7.4 -1.5 -0.6 29th 9.6 37.6 v low 26%
Forrest 23.0 +0.7 31.3 4th 7.8 -0.8 2.6 23rd 0.8 15.0 low 5%
Red Rocks Point 24.0 +2.7 26.5 31st 8.7 -2.5 8.7 31st 0.0 25.1 lowest 0%
South East (district 12)
Bulga Downs 25.5 +1.5 31.3 3rd 9.4 +0.4 2.9 23rd 9.6 24.1 average 40%
Kalgoorlie-Boulder Airport 22.7 +1.9 29.8 10th 9.2 +0.5 1.3 24th 1.2 24.1 v low 5%
Laverton Aero 23.9 +1.5 29.8 3rd 10.1 -0.3 2.1 25th 0.6 13.2 low 4%
Leinster Aero 25.0 +1.8 30.6 3rd 9.8 -0.6 3.0 22nd 0.2 13.8 low 1%
Leonora Aero 24.2 +0.9 30.0 3rd 9.7 -0.1 2.4 25th 0.2 9.1 low 2%
Munglinup West 21.3 +0.7 28.5 9th 9.9 +0.3 3.4 24th 12.6 38.3 low 33%
Norseman Aero 22.2 +1.1 30.4 10th 7.3 +0.3 -1.1 24th 1.4 17.7 v low 8%
Salmon Gums Res.Stn. 21.6 +1.7 27.7 9th 6.6 -0.5 -0.9 21st 1.6 33.3 lowest 5%
Southern Cross Airfield 23.0 +1.5 30.2 10th 7.3 -0.1 -1.5 24th 22.8 26.4 average 86%
North East (district 13)
Carnegie 26.0 +0.8 32.6 5th 9.9 -0.8 3.5 23rd 0.7 16.5 average 4%
Giles Meteorological Office 24.0 +0.2 31.2 5th 10.3 -1.0 3.5 21st 9.0 19.9 average 45%
Telfer Aero 28.2 -0.9 32.4 10th 14.1 -1.4 9.3 21st 0.0 18.8 lowest 0%
Warburton Airfield 24.9 +0.5 32.0 5th 10.6 +0.1 3.1 23rd 0.0 14.8 lowest 0%
Wiluna Aero 26.0 32.1 4th 9.1 1.6 23rd 0.8
Note: From 2017, information about Christmas Island and the Cocos and Keeling Islands can be found in the climate summary for the Remote Islands and Antarctica

Notes

The Monthly climate summary, usually published in the first week of the following 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.

This statement has been prepared based on information available on Tuesday 3 June 2025. 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, excluding the current year. The length of record can vary widely from site to site. Averages are not shown for sites with fewer 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.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.

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