Western Australia in summer 2017-18: A wet summer; below average temperatures in the north

Summer rainfall was above average across most of Western Australia, with highest on record totals in the north and southwest. It was tenth-wettest summer on record for WA as a whole. The State-wide mean maximum temperature was below average while the mean minimum temperature was above average.

Above average rainfall for most of WA

  • Summer rainfall was tenth-highest on record for WA as the passage of tropical cyclones Hilda, Joyce, and Kelvin, and tropical low 11U produced a string of moderate to heavy falls over much of WA
  • A number of sites in the west Kimberley, Lower West and neighbouring districts, had their wettest summer on record, or wettest summer for over two decades
  • Broome Airport easily broke its previous summer rainfall record by recording its highest January and highest February rainfall totals. These summer and monthly records were also unprecedented for the town back to 1889 (combining readings from the Broome Post Office (1889-1953) and Broome Airport).
  • The Kimberley region recorded its third wettest summer on record, following last year's wettest summer on record, whilst the South West Land Division also recorded above average rainfall
  • Tropical cyclone Hilda produced daily rainfalls between 100 mm and 300 mm in the west Kimberley from 27 to 29 December 2017; a few summer daily rainfall records were broken
  • Tropical cyclone Joyce, its remnant low pressure system, and an associated cloudband produced daily rainfall between 50 mm to 150 mm in the north and west of the State in early to mid-January; many summer daily rainfall records were registered near the west coast, particularly around Perth on 15 and 16 January
  • Tropical low 11U moved slowly over land through the Kimberley and Northern Interior producing very heavy rainfall from the end of January to the beginning of February; Kilto Station's 252.0 mm on 30 January is a summer record in its 42 years of recording
  • Tropical cyclone Kelvin produced very heavy rainfall between 100 mm and 370 mm in the west Kimberley in mid-February, and broke some February daily rainfall records

Below average daytime temperatures, above average overnight temperatures

  • Mean maximum temperatures were below average in large parts of the Kimberley, Pilbara, Interior, and Goldfields, near the path of tropical lows during summer; the average for WA was 0.20 °C below normal
  • Mean minimum temperatures were above average in large parts of western and southern WA, and below average in parts of the Kimberley and Interior; WA as a whole was 0.30 °C above average
  • The tropical low 11U and tropical cyclone Kelvin were also responsible for some record low summer maximum temperatures in the Kimberley, Pilbara, and Goldfields at the end of January and middle of February
  • Both Warmun and Derby in the Kimberley had their lowest summer mean minimum temperatures for over four decades

Further information

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Extremes in summer 2017-18
Hottest day 46.7 °C at Onslow Airport on 24 Dec 2017
Warmest days on average 39.5 °C at Marble Bar
Coolest days on average 22.3 °C at Albany
Coldest day 15.4 °C at Mount Barker on 6 Dec 2017
Coldest night 2.5 °C at Jarrahwood on 1 Dec 2017
Coolest nights on average 11.4 °C at Jarrahwood
Warmest nights on average 27.1 °C at Bedout Island
26.7 °C at Karratha Aero
Warmest night 33.0 °C at Wiluna Aero on 5 Jan 2018
Warmest on average overall 32.6 °C at Marble Bar
Coolest on average overall 18.7 °C at Shannon
Wettest overall 1848.0 mm at Country Downs
Wettest day 439.4 mm at Broome Airport on 30 Jan 2018
Strongest wind gust 169 km/h at Derby Aero on 7 Jan 2018

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
Jarrahdale 125.2 on 16 Jan 2018 109.0 on 9 Feb 1992 122
Kalannie 68.8 on 15 Jan 2018 68.6 on 17 Feb 1970 84
Wanneroo 94.6 on 16 Jan 2018 78.8 on 10 Feb 2017 81
Wooroloo 90.4 on 16 Jan 2018 79.2 on 10 Feb 2017 77
Pearce RAAF 66.8 on 16 Jan 2018 58.0 on 10 Feb 2017 67
Gidgegannup 114.2 on 16 Jan 2018 113.5 on 29 Jan 1990 61
Cygnet Bay 291.5 on 27 Dec 2017 269.4 on 10 Feb 2014 56
Karnet 131.3 on 16 Jan 2018 115.8 on 10 Feb 2017 56
Bakers Hill 92.2 on 16 Jan 2018 75.3 on 10 Feb 2017 53
Roleystone 139.2 on 16 Jan 2018 135.4 on 9 Feb 1992 52
Culford 110.8 on 16 Jan 2018 97.8 on 21 Jan 1982 51
Karragullen North 138.6 on 16 Jan 2018 102.4 on 22 Feb 1986 51
Bickley 139.2 on 16 Jan 2018 83.6 on 10 Feb 2017 50
Karragullen 147.6 on 16 Jan 2018 95.0 on 22 Jan 2000 47
Pickering Brook 131.4 on 16 Jan 2018 100.6 on 22 Feb 1986 43
Kilto Station 252.0 on 30 Jan 2018 239.0 on 29 Jan 1978 42
Nindethana Farm 52.6 on 15 Jan 2018 48.8 on 10 Feb 2006 42
Bindoon 60.6 on 16 Jan 2018 50.6 on 13 Jan 2006 41
Karara 70.8 on 15 Jan 2018 65.8 on 27 Jan 1939 41
Fremantle 128.4 on 16 Jan 2018 76.8 on 10 Feb 2017 31
Pickering Brook North 134.6 on 16 Jan 2018 92.0 on 29 Jan 1990 31
Huntly 144.0 on 16 Jan 2018 128.0 on 10 Feb 2017 29
Nunile 96.4 on 16 Jan 2018 92.0 on 13 Jan 2006 28
Derby (Manning Rd) 145.6 on 28 Dec 2017 142.4 on 27 Feb 2003 27
Rottnest Island 142.2 on 16 Jan 2018 93.8 on 10 Feb 2017 26
Swanbourne 138.6 on 16 Jan 2018 97.4 on 10 Feb 2017 26



Record highest summer total rainfall
New record
(mm)
Old
record
Years of
record
Average for
summer
Jarrahdale 221.2 185.3 in 1954 130 49.6
Bidyadanga 1354.7 949.5 in 1981 122 330.2
Wallal Downs 826.4 725.9 in 1941 104 223.0
Kimberley Downs 1295.6 1044.7 in 1966 102 491.7
Broome Airport 1703.2 1177.6 in 1996 78 437.9
Derby Aero 1263.8 1036.4 in 1981 63 486.5
Udialla 1040.2 942.5 in 1980 53 471.7
Cygnet Bay 1397.2 1263.3 in 2010 52 513.1
Roleystone 190.4 178.6 in 1991 50 51.9
Bickley 208.4 171.8 in 2016 47 56.2
Country Downs 1848.0 1527.0 in 1973 42 679.7
Karragullen North 212.6 184.4 in 1999 38 50.8
Kilto Station 1732.6 987.0 in 1996 34 582.4
Nita Downs 994.2 934.9 in 1977 34 365.5
Pinjarra Refinery 99.0 97.5 in 2016 29 42.7
Huntly 239.2 198.7 in 2016 27 60.6
Kimbolton 1776.8 1264.1 in 1981 24 823.6
Rottnest Island 183.4 117.6 in 2016 23 40.5
Busselton Aero 97.0 81.8 in 2010 21 29.7

Highest summer total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
summer
Mandora 729.4 797.2 in 1941 226.6
Marradong 179.0 279.7 in 1954* 41.9
Eucla 215.0 254.5 in 1959* 54.6
Busselton Shire 92.9 97.2 in 1962* 33.4
Carnegie 333.8 380.2 in 1966* 117.3
Serpentine 169.4 204.4 in 1954* 37.5
Anna Plains 833.0 919.1 in 1981 267.9
Dwellingup 233.2 266.6 in 1981* 60.7
Darkan 136.3 191.0 in 1981* 38.8
Wagerup Refinery 118.1 198.3 in 1981* 43.8
Jandakot Aero 149.2 244.0 in 1991* 47.0
Bryah 181.4 241.1 in 1962* 71.7

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




Record lowest summer daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Broome Airport 25.3 on 16 Feb 2018 25.4 on 21 Jan 1984 79 33.4
Wiluna 17.6 on 31 Jan 2018 18.5 on 1 Jan 2006 62 37.1
Telfer Aero 22.0 on 31 Jan 2018 25.0 on 2 Feb 1998 44 39.8
Derby Aero 25.1 on 16 Feb 2018 25.8 on 23 Feb 2002 33 35.7
Curtin Aero 24.6 on 16 Feb 2018 25.7 on 7 Jan 2015 27 36.7
Leinster Aero 15.9 on 30 Jan 2018 17.4 on 31 Jan 2006 24 36.0
Paraburdoo Aero 23.9 on 30 Jan 2018 24.5 on 27 Feb 2006 22 39.9



Record highest summer daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Troughton Island 30.3 on 12 Dec 2017 30.1 on 10 Dec 2016 40 26.6



Record lowest summer temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Newman Aero 14.9 on 1 Feb 2018 15.2 on 17 Dec 1999 22 24.3



Lowest summer mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
summer
Derby Aero 25.3 24.7 in 1975* 25.8

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





Summary statistics for summer 2017-18
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
summer
2017-18
Diff
from
average
Highest for
summer
2017-18
Mean for
summer
2017-18
Diff
from
average
Lowest for
summer
2017-18
Total for
summer
2017-18
Average
for
summer
Rank of
summer
2017-18
Fraction of
summer
average
North Kimberley (district 01)
Doongan 33.5 +0.1 39.0 12 Dec 2017 22.7 -0.1 20.0 30 Dec 2017 956.4 794.0 high 120%
Kalumburu 33.9 -0.3 39.6 11 Dec 2017 24.1 -0.5 21.5 7 Jan 2018 1344.2 866.3 v high 155%
Mount Elizabeth 32.6 -0.5 38.8 18 Dec 2017 22.3 +0.2 19.5 2 Jan 2018 902.0 668.5 high 135%
Troughton Island 32.2 +0.1 35.6 13 Dec 2017 26.8 +0.2 22.0 7 Jan 2018 970.8 584.1 high 166%
Truscott 32.4 -0.4 36.9 12 Dec 2017 25.2 -0.4 21.4 7 Jan 2018 1246.6 760.6 high 164%
Wyndham Aero 35.8 -0.9 42.0 13 Dec 2017 25.8 -0.5 21.0 15 Dec 2017 622.8 577.6 average 108%
East Kimberley (district 02)
Argyle Aerodrome 36.1 -0.3 42.9 12 Dec 2017 25.6 0.0 21.5 15 Dec 2017 311.4 480.5 low 65%
Halls Creek Airport 36.0   43.1 13 Dec 2017 23.9   21.4 22 Dec 2017 360.8
Kununurra Aero 35.3 -0.7 42.2 13 Dec 2017 25.0 -0.1 21.8 2 Jan 2018 566.4 574.0 average 99%
Warmun 34.8 -2.4 45.1 9 Dec 2017 22.8 -2.0 20.3 15 Dec 2017 459.6 478.9 average 96%
West Kimberley (district 03)
Bidyadanga 33.6 -0.9 38.5 7 Jan 2018 25.8 0.0 18.0 17 Jan 2018 1354.7 330.2 highest 410%
Broome Airport 32.7 -0.7 38.3 2 Dec 2017 26.3 0.0 22.0 8 Jan 2018 1703.2 437.9 highest 389%
Curtin Aero 35.2 -1.5 42.1 2 Dec 2017 24.4 -0.5 21.3 23 Jan 2018 689.2 578.1 high 119%
Cygnet Bay 33.3 -0.6 38.0 12 Dec 2017 25.7 +0.3 23.1 23 Jan 2018 1397.2 513.1 highest 272%
Derby Aero 34.7 -1.0 41.7 12 Dec 2017 25.3 -0.5 19.2 8 Jan 2018 1263.8 486.5 highest 260%
Fitzroy Crossing Aero 37.4 -0.4 43.9 13 Dec 2017 25.0 -0.2 22.3 6 Dec 2017 357.4 474.6 low 75%
De Grey (district 04)
Bedout Island 33.3   37.3 3 Jan 2018 27.1   22.0 21 Jan 2018
Karratha Aero 35.5 -0.3 42.1 3 Jan 2018 26.7 +0.4 22.3 19 Dec 2017 73.8 139.6 average 53%
Legendre Island 32.8   38.1 3 Jan 2018 26.3   22.8 31 Jan 2018
Mandora 35.0 -1.1 42.9 25 Dec 2017 25.4 +0.4 19.6 31 Jan 2018 729.4 226.6 v high 322%
Marble Bar 39.5 -1.3 45.3 5 Jan 2018 25.7 -0.5 17.9 31 Jan 2018 363.2 222.1 high 164%
Port Hedland Airport 35.9 -0.5 42.6 3 Jan 2018 25.7 +0.6 21.3 30 Jan 2018 165.0 172.8 average 95%
Roebourne Aero 38.5 -0.2 44.8 3 Jan 2018 26.0 +0.3 21.8 20 Dec 2017 94.8 146.0 average 65%
Fortescue (district 05)
Barrow Island Airport 33.5 +0.5 39.2 23 Jan 2018     22.0 11 Dec 2017 20.6 85.2 average 24%
Learmonth Airport 37.4 0.0 45.4 6 Jan 2018 23.3 +0.6 16.8 19 Dec 2017 48.8 79.0 average 62%
Mardie 36.5 -1.1 45.1 3 Jan 2018 25.3 +0.8 19.5 1 Dec 2017 27.2 110.5 average 25%
Onslow Airport 35.9 -0.3 46.7 24 Dec 2017 25.0 +1.1 20.5 18 Dec 2017 22.0 104.9 average 21%
Thevenard Island 33.4 +0.4 41.1 23 Jan 2018 25.6 +0.5 21.4 11 Dec 2017 13.0 90.4 average 14%
Wittenoom 38.3 -0.7 44.5 15 Dec 2017 25.6 0.0 18.7 1 Feb 2018 330.8 269.7 high 123%
West Gascoyne (district 06)
Carnarvon Airport 31.3 +0.2 42.6 13 Jan 2018 23.0 +0.8 18.4 1 Dec 2017 13.2 37.0 average 36%
Denham 29.7 -0.9 42.5 13 Jan 2018 22.1 +0.3 18.0 12 Jan 2018 9.6 25.5 average 38%
Murchison 37.7 -0.8 44.1 8 Jan 2018 22.4 +0.4 15.0 18 Dec 2017 134.7 68.1 high 198%
Shark Bay Airport 33.4 -0.3 43.6 2 Dec 2017 21.5 +0.3 16.3 20 Dec 2017 6.8 42.5 average 16%
East Gascoyne (district 07)
Newman Aero 38.1 -0.3 44.4 22 Jan 2018 24.8 +0.5 14.9 1 Feb 2018 123.4 177.5 average 70%
Murchison (district 07A)
Meekatharra Airport 37.2 0.0 45.5 5 Jan 2018 23.9 +0.5 14.9 1 Feb 2018 148.2 81.6 high 182%
Mount Magnet Aero 37.2 +0.4 44.6 9 Jan 2018 22.9 +0.3 14.4 18 Dec 2017
Paynes Find 36.5 +0.2 43.2 3 Jan 2018 21.1 +0.9 13.1 19 Dec 2017 106.4 57.5 high 185%
North Coast (district 08)
Dalwallinu 33.9 -0.5 41.9 2 Jan 2018 17.6 +0.1 11.3 12 Jan 2018 28.2 49.7 average 57%
Geraldton Airport 31.0   43.4 8 Dec 2017 18.2   10.2 1 Dec 2017 27.6
Kalbarri 32.1 -0.9 43.1 13 Jan 2018 20.1 +0.8 14.2 27 Feb 2018 16.6 17.1 average 97%
Mullewa 35.8 -0.1 42.5 2 Jan 2018 19.7 +0.8 14.1 27 Feb 2018 87.6 40.8 high 215%
North Island 27.2 -0.4 30.3 14 Jan 2018 21.1 0.0 17.1 18 Dec 2017 12.0 13.8 average 87%
Wongan Hills     41.0 2 Jan 2018 17.3 0.0 10.7 18 Dec 2017 62.4 40.8 high 153%
Central Coast (district 09)
Badgingarra Research Stn     41.1 15 Feb 2018 16.8 +0.2 11.4 6 Jan 2018 64.2 35.4 high 181%
Bickley 28.8 -1.0 36.4 2 Jan 2018 14.9 -0.1 8.9 6 Jan 2018 208.4 56.2 highest 371%
Garden Island HSF 26.0 -1.1 40.1 14 Jan 2018 18.4 -0.1 13.6 1 Dec 2017 141.8 43.9 high 323%
Jandakot Aero 30.2 -0.5 38.6 15 Feb 2018 16.7 +0.5 8.1 6 Jan 2018 149.2 47.0 v high 317%
Lancelin 27.3 -1.5 38.6 13 Jan 2018 17.1 -0.2 11.5 18 Dec 2017 81.0 32.9 high 246%
Millendon (Swan Valley) 31.7   39.8 2 Jan 2018 16.6   9.9 12 Jan 2018 94.8
Pearce RAAF 32.3 -0.1 40.0 2 Jan 2018 16.6 +0.2 9.7 12 Jan 2018 107.2 33.0 v high 325%
Perth Airport 31.0 +0.1 39.0 15 Feb 2018 17.1 +0.6 9.1 12 Jan 2018 112.4 37.5 v high 300%
Perth Metro 30.1 -0.6 38.0 14 Jan 2018 17.6 0.0 12.4 18 Dec 2017 147.0 44.1 v high 333%
Rottnest Island 25.3 -1.0 35.9 14 Jan 2018 18.5 -0.2 11.4 18 Dec 2017 183.4 40.5 highest 453%
Swanbourne 27.9 -1.6 38.7 14 Jan 2018 18.0 +0.2 12.4 6 Jan 2018 160.2 43.7 v high 367%
South Coast (district 09A)
Albany 22.3 -0.2 29.1 10 Dec 2017 16.2 +1.3 11.0 7 Dec 2017 73.9 77.3 average 96%
Albany Airport 24.2   33.5 10 Dec 2017 13.7   5.3 1 Dec 2017 91.2
Bridgetown 28.6 -0.5 38.5 14 Jan 2018 12.1 -0.5 2.8 1 Dec 2017 67.2 49.1 average 137%
Bunbury 28.8 -0.3 40.6 14 Jan 2018 14.4 -0.5 6.3 1 Dec 2017 34.6 37.6 average 92%
Busselton Aero 28.5 -0.9 39.8 14 Jan 2018 13.9 +0.1 6.5 1 Dec 2017 97.0 29.7 highest 327%
Cape Leeuwin 22.9 +0.2 28.5 2 Feb 2018 17.1 +0.4 11.1 1 Dec 2017 84.4 52.8 high 160%
Cape Naturaliste 25.9 +0.9 36.9 14 Jan 2018 14.8 -0.1 8.8 1 Dec 2017 43.0 35.5 high 121%
Collie East 29.5 -0.5 38.3 14 Jan 2018 12.5 -0.5 4.7 1 Dec 2017 100.2 54.9 high 183%
Donnybrook 29.8 0.0 39.4 14 Jan 2018 14.5 +0.8 6.6 6 Jan 2018 83.3 44.3 high 188%
Dwellingup 28.9 0.0 37.8 14 Jan 2018 14.1 +0.3 6.7 6 Jan 2018 233.2 60.7 v high 384%
Esperance 25.5 -0.1 41.1 17 Jan 2018 16.0 +0.6 8.7 2 Dec 2017
Esperance Aero 27.7 +0.6 41.5 5 Jan 2018 14.8 +0.2 8.6 1 Dec 2017 151.8 78.3 v high 194%
Hopetoun North 24.3 -0.7 38.9 10 Dec 2017 15.5 +0.5 7.5 8 Dec 2017 58.2 92.2 low 63%
Jarrahwood 29.1 +0.2 38.8 14 Jan 2018 11.4 -1.1 2.5 1 Dec 2017 89.4 46.9 high 191%
Mandurah 28.1 -0.7 40.3 14 Jan 2018 18.2 -0.3 13.3 1 Dec 2017 124.4 49.5 high 251%
Manjimup 26.7 +0.3 37.7 14 Jan 2018 12.8 +0.1 6.3 1 Dec 2017 82.4 64.0 high 129%
North Walpole 23.6 -0.4 33.0 3 Feb 2018 14.2 0.0 8.9 8 Dec 2017 102.4 96.1 average 107%
Rocky Gully 26.0 -0.8 38.0 10 Dec 2017 12.2 -0.1 3.1 1 Dec 2017 54.6 68.8 average 79%
Shannon 25.2 -0.7 36.3 14 Jan 2018 12.3 -0.2 4.4 1 Dec 2017 89.8 63.5 high 141%
Witchcliffe 25.3 -0.9 34.0 10 Dec 2017 13.5 -0.1 5.2 1 Dec 2017 92.6 37.6 v high 246%
North Central (district 10)
Bencubbin 32.9 -0.6 41.5 16 Feb 2018 18.0 +0.6 11.1 1 Dec 2017 17.8 50.3 low 35%
Cunderdin Airfield 33.7 -0.2 43.8 16 Feb 2018 16.6 +0.1 10.5 1 Dec 2017 71.4 49.5 high 144%
Merredin 33.3 +0.2 42.8 16 Feb 2018 17.5 +0.3 8.6 27 Feb 2018 38.4 44.7 average 86%
Northam 33.0 -0.4 40.9 16 Feb 2018 15.5 -1.1 9.4 1 Dec 2017 96.6 35.6 v high 271%
York     40.5 16 Feb 2018 15.7 +0.1 7.0 1 Dec 2017 123.8 65.2 high 190%
South Central (district 10A)
Beverley 33.3 -0.1 41.2 16 Feb 2018 15.9 +0.1 8.4 1 Dec 2017 109.6 37.8 v high 290%
Brookton 31.8 -0.3 40.3 16 Feb 2018 15.3 +0.3 7.7 12 Jan 2018 82.9 39.7 high 209%
Corrigin 31.6 0.0 41.9 16 Feb 2018 15.6 +0.3 8.4 1 Dec 2017
Hyden 33.1 +0.3 42.8 3 Jan 2018 15.1 0.0 6.0 1 Dec 2017 26.3 55.2 average 48%
Jacup 27.3 +0.1 38.8 10 Dec 2017 12.4 -0.4 4.4 1 Dec 2017 61.6 83.8 average 74%
Katanning 29.2 -0.2 40.7 16 Feb 2018 13.1 -0.1 4.5 1 Dec 2017 2.2 63.7 v low 3%
Lake Grace 30.2 -0.2 42.0 16 Feb 2018 14.7 -0.1 6.6 1 Dec 2017 60.2 77.4 average 78%
Narembeen 33.2 +0.2 42.2 16 Feb 2018 16.4 +0.4 8.9 1 Dec 2017 68.6 49.0 high 140%
Narrogin 30.1 +0.1 40.2 16 Feb 2018 14.3 +0.6 7.5 1 Dec 2017 105.8 44.6 v high 237%
Newdegate Research Station 30.7 +0.3 40.8 16 Feb 2018 13.5 +0.3 3.8 1 Dec 2017 47.4 57.7 average 82%
Pingelly     40.5 16 Feb 2018 14.1 -1.1 7.5 1 Dec 2017 61.4 38.6 high 159%
Ravensthorpe 27.7 -0.4 39.0 10 Dec 2017 14.1 +0.3 5.5 1 Dec 2017 56.1 75.7 average 74%
Wagin 30.3 0.0 39.8 16 Feb 2018 14.3 +0.2 6.5 1 Dec 2017 58.6 42.9 high 137%
Wandering 30.6 -0.8 38.8 16 Feb 2018 13.9 +0.3 5.5 1 Dec 2017 152.8 57.8 high 264%
Eucla (district 11)
Eucla 28.0 +2.6 46.0 18 Jan 2018 17.3 +1.0 9.1 15 Dec 2017 215.0 54.6 v high 394%
Eyre 27.8 +1.5 45.2 26 Dec 2017 15.8 +0.7 4.5 15 Dec 2017 224.1 59.3 v high 378%
Forrest 31.4 -0.9 45.5 18 Jan 2018 16.9 +1.0 8.6 2 Dec 2017 197.4 84.5 v high 234%
Red Rocks Point 26.1 +1.1 45.4 5 Jan 2018 18.0 +0.2 11.1 21 Dec 2017 160.0 90.0 high 178%
South East (district 12)
Bulga Downs 36.5 -0.3 45.0 5 Jan 2018 21.4 0.0 13.7 18 Dec 2017
Kalgoorlie-Boulder Airport 32.1 -0.5 44.0 5 Jan 2018 18.1 +0.5 11.6 28 Feb 2018 113.6 75.8 high 150%
Laverton Aero 33.6 -0.8 44.9 5 Jan 2018 20.5 -0.1 12.5 30 Jan 2018 147.2 139.9 average 105%
Leinster Aero 35.1 -0.9 45.0 5 Jan 2018 21.9 -0.3 13.0 30 Jan 2018 111.2 107.7 average 103%
Leonora Aero 34.3 -1.4 45.5 5 Jan 2018 21.5 -0.3 13.8 31 Jan 2018 126.6 110.6 average 114%
Munglinup West 28.1 -0.3 40.5 16 Feb 2018 14.0 -0.1 6.3 1 Dec 2017 132.6 111.2 average 119%
Norseman Aero 31.8 +0.2 43.6 5 Jan 2018 15.7 +0.4 5.1 1 Dec 2017 72.8 87.6 average 83%
Southern Cross Airfield 33.3 -0.4 43.8 3 Jan 2018 17.3 +0.3 10.0 1 Dec 2017 0.6 69.2 lowest 1%
North East (district 13)
Carnegie 35.2 -2.5 42.8 23 Dec 2017 22.3 -0.7 13.4 31 Jan 2018 333.8 117.3 v high 285%
Giles Meteorological Office 36.8 +0.4 42.9 24 Dec 2017 22.6 -0.2 16.2 3 Dec 2017 217.6 124.1 high 175%
Telfer Aero 38.3 -1.5 44.8 24 Dec 2017 25.5 -0.1 17.0 1 Feb 2018 420.8 214.4 v high 196%
Wiluna 36.4 -0.7 43.5 22 Dec 2017 22.7 +0.6 14.0 30 Jan 2018 181.3 98.5 high 184%
Wiluna Aero 36.7   45.4 5 Jan 2018 23.5   14.0 1 Feb 2018 124.6
Offshore Islands (district 200)
Browse Island 30.4   33.4 22 Dec 2017     22.3 25 Jan 2018
Varanus Island 31.8 -0.1 36.2 24 Jan 2018 26.1 +0.2 22.6 18 Dec 2017 50.6 92.4 average 55%

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 11 am on Thursday 1 March 2018. 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
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Enquiries