Western Australia in January 2018: A wet January

Rainfall in January 2018 was above average across most of Western Australia as tropical cyclone Joyce and a slow-moving tropical low produced widespread significant rains. It was the fifth-wettest January on record for the State as a whole. The mean maximum temperature was near average but mean minimum temperature was above average when averaged across WA.

Above average rainfall for most of WA

  • Rainfall in January 2018 for WA was about 110% above the January average and the fifth-wettest January since comparable records commenced in 1900
  • Rainfall for the South West Land Division (SWLD) was more than twice the January average
  • Tropical cyclone Joyce, or its remnant low pressure system, and an associated cloudband produced widespread significant rainfall in the north and west of the State in early to mid-January; many record high January daily rainfall totals were recorded near the west coast, particularly around Perth on the 15th and 16th
  • A tropical low moved slowly over land through the Kimberley and Northern Interior at the end of January producing very heavy rainfall, including a few January daily rainfall records
  • West Roebuck recorded 448.8 mm in the 24 hours to 9am on the 30th, which was its highest daily rainfall for any month in its 17 years of record, and the highest daily rainfall in WA for almost 14 years, since 525.5 mm was recorded at Nifty Copper Mine in the Pilbara on 28 March 2004
  • Broome Airport recorded a daily rainfall of 412.2 mm from its automatic rainguage (though its manual rainguage had a higher total at 439.4 mm ) on the 30th, which was its 2nd-highest daily rainfall for any month on record; the record being 476.6 mm on 30 January 1997 also the result of a slow-moving tropical low
  • Many sites in the west Kimberley, east Pilbara, Lower West and adjacent parts of neighbouring districts recorded their wettest January on record or wettest January for at least 20 years

Very much above average overnight temperatures in southeast WA

  • Mean maximum temperature for WA was close to average; the warmest since 2015
  • Mean minimum temperature for WA was 0.43 °C above average; the warmest since 2016
  • A broad area in the north and central WA experienced cold conditions with daily maxima more than 10 °C lower than average at the end of January; several sites in the Pilbara, Southern Interior and northern Goldfields broke both January low maxima and minima records
  • Mean minimum temperatures in the north and west Kimberley were 1 °C to 2 °C cooler than averages; a number of sites had their coolest January nights on record
  • In contrast, the southeast of the State recorded above average mean minimum temperatures; Eyre equalled its previous January record

Record wind gust at Derby Aerodrome in the west Kimberley

  • Derby Aerodrome recorded a wind gust of 169 km/h (91 knots) in the evening on the 7th during a severe thunderstorm, which was its highest wind gust in 22 years of recording. The previous record at the site was 124 km/h (67 knots) on 9 February 1977

Further information

Media
(03) 9669 4057
Enquiries

Extremes in January 2018
Hottest day 46.2 °C at Emu Creek Station on the 5th
Warmest days on average 42.0 °C at Emu Creek Station
Coolest days on average 22.4 °C at Albany
Coldest day 15.6 °C at Laverton Aero on the 30th
Coldest night 4.6 °C at Jarrahwood on the 6th
Coolest nights on average 11.9 °C at Jarrahwood
Warmest nights on average 27.7 °C at Karratha Aero
Warmest night 33.0 °C at Wiluna Aero on the 5th
Warmest on average overall 32.9 °C at Roebourne Aero
Coolest on average overall 19.0 °C at North Walpole
19.0 °C at Shannon
Wettest overall 1090.4 mm at West Roebuck
Wettest day 448.8 mm at West Roebuck on the 30th
Strongest wind gust 169 km/h at Derby Aero on the 7th

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 January daily rainfall
New record
(mm)
Old
record
Years of
record
Murgoo 106.0 on the 15th 101.1 on the 22nd in 1967 122
Toodyay 87.0 on the 16th 71.4 on the 13th in 2006 122
New Norcia 75.0 on the 16th 70.4 on the 29th in 2017 121
Marradong 133.0 on the 16th 121.0 on the 21st in 1982 112
Woolgorong 58.2 on the 15th 55.9 on the 21st in 1952 112
Jarrahdale 125.2 on the 16th 60.6 on the 20th in 2012 111
Chidlow 102.2 on the 16th 86.4 on the 20th in 2012 110
Mundaring 88.4 on the 16th 68.8 on the 20th in 2012 108
Yuna 43.8 on the 15th 41.1 on the 21st in 1916 105
Mount Narryer 83.0 on the 15th 82.6 on the 22nd in 1967 103
Canna 54.0 on the 15th 41.0 on the 29th in 1990 100
Midland 73.2 on the 17th 50.8 on the 15th in 1915 95
Serpentine 110.6 on the 16th 60.6 on the 20th in 2012 92
Mandora 150.0 on the 12th 146.0 on the 25th in 2003 89
Riverside 68.0 on the 15th 41.9 on the 14th in 1963 86
Perth Airport 82.6 on the 16th 60.8 on the 22nd in 2000 74
Wanneroo 94.6 on the 16th 66.4 on the 21st in 1982 73
Muresk Institute 81.6 on the 16th 60.0 on the 31st in 2017 67
Pearce RAAF 66.8 on the 16th 33.0 on the 15th in 2000 64
Gidgegannup 114.2 on the 16th 113.5 on the 29th in 1990 60
Karnet 131.3 on the 16th 106.8 on the 21st in 1982 55
Bakers Hill 92.2 on the 16th 57.0 on the 21st in 1982 51
Bickley 139.2 on the 16th 47.2 on the 21st in 1982 50
Roleystone 139.2 on the 16th 79.6 on the 22nd in 2000 50
Karragullen North 138.6 on the 16th 88.0 on the 22nd in 2000 48
Culford 110.8 on the 16th 97.8 on the 21st in 1982 47
Jandakot Aero 119.0 on the 16th 76.0 on the 21st in 1982 44
Nindethana Farm 52.6 on the 15th 39.0 on the 20th in 1982 41
Karara 70.8 on the 15th 65.8 on the 27th in 1939 39
Kilto Station 252.0 on the 30th 239.0 on the 29th in 1978 37
Mosman Park 120.0 on the 16th 58.6 on the 22nd in 2000 37
Dalgety Downs 75.2 on the 15th 65.0 on the 31st in 2016 34
Maida Vale 84.6 on the 16th 69.2 on the 22nd in 2000 34
Pinjarra Refinery 57.6 on the 16th 20.0 on the 23rd in 1999 32
Murchison 47.0 on the 15th 33.1 on the 21st in 2001 30
Huntly 144.0 on the 16th 33.4 on the 15th in 2000 28
Nunile 96.4 on the 16th 92.0 on the 13th in 2006 28
Rottnest Island 142.2 on the 16th 46.8 on the 23rd in 1999 26
Swanbourne 138.6 on the 16th 79.0 on the 22nd in 2000 25
Yourdamung Lake 96.6 on the 16th 32.4 on the 20th in 2016 24
York 76.6 on the 16th 73.6 on the 13th in 2006 22
Kalumburu 122.8 on the 29th 116.0 on the 28th in 2001 20
Waeel 39.8 on the 16th 34.4 on the 6th in 2011 20
Wandering 89.0 on the 16th 35.2 on the 20th in 2016 20



Record highest January total rainfall
New record
(mm)
Old
record
Years of
record
Average for
January
Jarrahdale 131.4 113.0 in 2000 132 13.7
Murgoo 112.0 110.7 in 2006 129 18.3
Warrawagine 421.8 286.8 in 1907 107 72.3
Mulyie 303.5 297.3 in 1942 105 66.7
Serpentine 116.2 60.6 in 2012 95 10.8
Broome Airport* 915.6 910.8 in 1997 78 191.1
Dalgety Downs 144.4 122.4 in 1909 51 32.2
Bickley 143.2 131.8 in 2000 50 21.0
Granite Peak 132.4 102.6 in 2001 38 40.2
Kilto Station 917.8 620.4 in 1978 38 226.7
Huntly 152.3 78.7 in 2000 28 19.8
Rottnest Island 143.2 59.0 in 2000 26 17.1
Curtin Aero 518.0 454.8 in 2015 24 225.0
Swanbourne 145.8 140.8 in 2000 24 20.9
Yourdamung Lake 102.6 74.8 in 2000 24 20.4

* note: 915.6 mm was recorded by automatic rainguage, however the manual rainguage at Broomer Airport recorded a higher monthly total of 942.2 mm


Highest January total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
January
Mandora 419.0 627.2 in 1942 87.6
Wallal Downs 439.6 486.8 in 1942* 90.5
Riverside 68.8 70.3 in 1963* 11.6
Byro 156.0 195.4 in 1967* 24.6
Derby Aero 683.4 703.2 in 1978* 204.3
Karnet 138.4 167.0 in 1982 19.3
Marradong 136.0 170.0 in 1982 12.6
Bidyadanga 608.7 665.0 in 1982* 131.3
Dwellingup 153.6 237.4 in 1982* 17.1
Darkan 93.4 187.4 in 1982* 13.0
Wanneroo 100.5 123.2 in 1982* 12.2
Country Downs 854.8 1000.0 in 1982* 280.6
Culford 116.2 134.4 in 1982* 17.0
Wagerup Refinery 65.3 178.6 in 1982* 15.6
Gleneva 54.4 79.2 in 1990 8.8
Yuna 44.8 65.2 in 1990 9.7
Chidlow 115.1 136.6 in 1990* 14.7
Fossil Downs 316.0 365.6 in 1991* 159.8
Mundaring 93.2 145.0 in 1990* 14.5
Anna Plains 474.1 543.2 in 1997 111.5
Kimberley Downs 597.8 601.8 in 1997 209.7
Yarrie 377.0 508.0 in 1997* 79.7

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



 


Record lowest January daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Mandora 25.4 on the 31st 27.0 on the 24th in 2003 54 36.0
Telfer Aero 22.0 on the 31st 25.0 on the 10th in 1983 44 40.3
Carnegie 17.1 on the 30th 21.0 on the 10th in 2012 28 38.7
Argyle Aerodrome 26.3 on the 8th 26.8 on the 15th in 2014 24 36.4
Leinster Aero 15.9 on the 30th 17.4 on the 31st in 2006 24 37.2
Newman Aero 20.8 on the 30th 22.7 on the 1st in 2006 22 39.0
Paraburdoo Aero 23.9 on the 30th 25.3 on the 8th in 1997 22 40.6



Lowest January mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
January
Warmun 33.6 =33.6 in 1984 37.1



Record lowest January temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Bidyadanga 18.0 on the 17th 19.4 on the 30th in 1963 59 26.0
Derby Aero 19.2 on the 8th 20.2 on the 21st in 1975 33 25.7
Carnegie 13.4 on the 31st 14.9 on the 2nd in 2006 28 23.9
Newman Aero 15.8 on the 31st 16.1 on the 2nd in 2006 22 24.9



Record highest January mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Eyre 16.7 = 16.7 in 2011 58 15.3



Record lowest January mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Warmun 22.1 22.5 in 1976 55 24.8
Derby Aero 24.3 24.4 in 1976 32 25.7
Curtin Aero 23.9 = 23.9 in 2000 26 25.0



Record lowest January mean temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Warmun 27.9 28.1 in 1974 55 31.0

Lowest January mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
January
Curtin Aero 28.9 28.8 in 1997 30.7
Derby Aero 28.8 =28.8 in 1997 30.5



Summary statistics for January 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2018
Diff
from
average
Highest for
January
2018
Mean for
January
2018
Diff
from
average
Lowest for
January
2018
Total for
January
2018
Average
for
January
Rank of
January
2018
Fraction of
January
average
North Kimberley (district 01)
Doongan 32.7 -0.5 36.0 24th 22.5 -0.3 16.0 30th 401.5 306.2 high 131%
Kalumburu 33.0 -0.9 37.3 1st 24.1 -0.5 21.5 7th 658.8 325.1 v high 203%
Mount Elizabeth 31.7 -1.2 36.4 6th 22.0 -0.1 19.5 2nd 314.8 257.6 high 122%
Troughton Island 31.4 -0.4 33.7 1st 25.9 -0.5 22.0 7th 492.4 271.0 high 182%
Truscott 31.6 -0.5 35.0 1st 24.6 -0.8 21.4 7th 522.0 322.9 high 162%
Wyndham Aero 34.8 -1.6 39.8 22nd 25.5 -0.7 21.9 2nd 288.8 200.6 high 144%
East Kimberley (district 02)
Argyle Aerodrome 35.1 -1.3 41.9 1st 25.2 -0.5 22.2 20th 207.6 162.4 average 128%
Halls Creek Airport 35.9   41.8 6th 23.8   21.8 31st 177.8
Kununurra Aero 34.3 -1.5 40.5 1st 24.9 -0.2 21.8 2nd 211.8 209.7 average 101%
Warmun 33.6 -3.5 40.1 7th 22.1 -2.7 20.3 20th 204.3 181.7 average 112%
West Kimberley (district 03)
Bidyadanga 33.6 -0.8 38.5 7th 24.9 -1.1 18.0 17th 608.7 131.3 v high 464%
Broome Airport 32.6 -0.7 34.8 7th 25.5 -0.8 22.0 8th 915.6 191.1 highest 479%
Curtin Aero 33.8 -2.5 38.1 6th 23.9 -1.1 21.3 23rd 518.0 225.0 highest 230%
Cygnet Bay 32.8 -0.8 35.5 4th 25.1 -0.5 23.1 23rd 461.1 243.0 high 190%
Derby Aero 33.2 -2.0 37.4 24th 24.3 -1.4 19.2 8th 683.4 204.3 v high 335%
Fitzroy Crossing Aero 36.9 -0.6 41.5 6th 24.8 -0.4 22.8 31st 173.4 182.0 average 95%
De Grey (district 04)
Bedout Island 33.9   37.3 3rd 27.1   22.0 21st
Karratha Aero 36.6 +0.7 42.1 3rd 27.7 +1.0 22.8 31st 27.8 48.6 average 57%
Legendre Island 33.8   38.1 3rd 27.0   22.8 31st
Mandora 35.1 -0.9 41.2 2nd 25.5 +0.1 19.6 31st 419.0 87.6 v high 478%
Marble Bar 38.9 -1.9 45.3 5th 25.3 -1.2 17.9 31st 314.0 107.7 high 292%
Pardoo Station 37.3 +1.2 43.0 3rd 25.2 -0.7 21.0 13th 213.2 65.6 v high 325%
Port Hedland Airport 35.6 -0.7 42.6 3rd 25.8 +0.2 21.3 30th 123.8 64.0 high 193%
Roebourne Aero 38.9 +0.3 44.8 3rd 26.8 +0.6 23.1 31st 70.0 77.1 average 91%
Fortescue (district 05)
Barrow Island Airport 34.9 +1.8 39.2 23rd 26.8 +1.0 22.8 1st 13.8 25.2 average 55%
Learmonth Airport 39.2 +1.3 45.4 6th 24.4 +1.4 19.6 12th 17.6 31.0 average 57%
Mardie 38.1 +0.2 45.1 3rd 26.6 +1.6 23.4 1st 0 38.1 lowest 0%
Onslow Airport 37.4 +1.0 45.7 23rd 26.2 +1.8 22.9 11th 18.8 38.6 average 49%
Thevenard Island 34.5 +1.4 41.1 23rd 26.6 +1.3 23.5 1st 5.6 30.7 average 18%
Wittenoom 38.0 -1.5 44.4 5th 25.7 -0.3 19.6 31st 238.8 116.2 high 206%
West Gascoyne (district 06)
Carnarvon Airport 31.9 +0.6 42.6 13th 23.8 +1.2 19.7 12th 0 11.8 lowest 0%
Denham 30.0 -0.7 42.5 13th 22.8 +0.7 18.0 12th 0 7.6 lowest 0%
Emu Creek Station 42.0 +0.9 46.2 5th 25.4 +0.9 21.7 12th 44.5 46.7 average 95%
Murchison 39.1 -0.2 44.1 8th 23.5 +1.0 16.0 11th 62.3 22.6 v high 276%
Shark Bay Airport 33.6 -0.4 42.4 13th 22.4 +0.8 17.5 12th 2.0 8.9 average 22%
East Gascoyne (district 07)
Newman Aero 38.5 -0.5 44.4 22nd 25.6 +0.7 15.8 31st 84.2 67.9 high 124%
Paraburdoo Aero 39.1 -1.5 45.1 6th 26.0 +0.1 17.7 31st 107.2 55.4 high 194%
Murchison (district 07A)
Meekatharra Airport 39.7 +1.4 45.5 5th 25.3 +0.9 15.6 31st 62.2 30.1 high 207%
Mount Magnet Aero 38.7 +0.8 44.6 9th 24.0 +0.5 16.7 11th 44.8 27.9 high 161%
Paynes Find 37.5 +0.1 43.2 3rd 21.9 +0.9 14.6 11th 93.4 21.3 v high 438%
North Coast (district 08)
Dalwallinu 34.6 -0.7 41.9 2nd 18.1 -0.1 11.3 12th 0 24.1 lowest 0%
Geraldton Airport 31.6   42.6 13th 19.1   13.0 12th 16.6
Kalbarri 32.8 -0.4 43.1 13th 21.2 +1.6 16.0 12th 0 5.3 lowest 0%
Morawa Airport 37.1 -0.3 43.6 2nd 20.6 +0.7 13.6 12th 49.4 24.2 high 204%
Mullewa 36.9 +0.1 42.5 2nd 20.6 +1.1 14.4 12th 47.3 13.8 v high 343%
North Island 27.5 -0.1 30.3 14th 21.4 +0.1 19.4 12th 7.2 3.0 high 240%
Wongan Hills 34.1 -0.5 41.0 2nd 17.7 -0.2 12.1 7th 47.0 15.5 v high 303%
Central Coast (district 09)
Badgingarra Research Stn 32.6 -2.1 38.7 20th 17.1 0.0 11.4 6th 46.0 11.2 v high 411%
Bickley 29.2 -1.4 36.4 2nd 15.4 0.0 8.9 6th 143.2 21.0 highest 682%
Garden Island HSF 26.4 -1.1 40.1 14th 18.9 -0.1 13.8 6th 108.2 16.5 v high 656%
Jandakot Aero 30.8 -0.6 37.6 14th 17.2 +0.4 8.1 6th 122.0 16.7 v high 731%
Lancelin 27.5 -1.7 38.6 13th 17.4 -0.2 12.4 6th 35.0 11.2 high 313%
Millendon (Swan Valley) 32.2   39.8 2nd 17.0   9.9 12th 58.6
Pearce RAAF 32.7 -0.8 40.0 2nd 17.0 0.0 9.7 12th 69.4 10.7 v high 649%
Perth Airport 31.7 -0.1 38.3 2nd 17.3 +0.2 9.1 12th 83.8 11.0 v high 762%
Perth Metro 30.8 -0.4 38.0 14th 18.1 0.0 12.6 6th 106.2 20.2 v high 526%
Rottnest Island 25.5 -1.1 35.9 14th 19.0 -0.1 15.2 6th 143.2 17.1 highest 837%
Swanbourne 28.4 -1.5 38.7 14th 18.4 +0.1 12.4 6th 145.8 20.9 highest 698%
South Coast (district 09A)
Albany 22.4 -0.4 27.5 5th 16.6 +1.4 12.8 12th 16.0 23.9 average 67%
Albany Airport 24.2   30.3 5th 14.2   9.5 5th 21.6
Bridgetown 29.1 -0.9 38.5 14th 12.5 -0.7 6.5 12th 21.8 17.2 high 127%
Bunbury 29.7 -0.1 40.6 14th 14.8 -0.7 6.5 6th 16.4 12.2 high 134%
Busselton Aero 29.3 -0.9 39.8 14th 14.2 -0.1 8.5 6th 55.6 15.0 high 371%
Cape Leeuwin 22.9 -0.2 25.6 15th 17.4 +0.4 14.7 11th 18.8 16.3 high 115%
Cape Naturaliste 26.3 +0.8 36.9 14th 15.0 -0.2 11.1 8th 18.4 10.9 high 169%
Collie East 30.1 -0.7 38.3 14th 13.3 -0.2 5.4 6th 59.0 21.8 high 271%
Donnybrook 30.4 -0.2 39.4 14th 15.0 +0.9 6.6 6th 31.4 12.8 high 245%
Dwellingup 29.5 -0.2 37.8 14th 14.7 +0.4 6.7 6th 153.6 17.1 v high 898%
Esperance 25.7 -0.5 41.1 17th 16.8 +1.1 10.9 7th 5.2 26.7 low 19%
Esperance Aero 28.3 +0.5 41.5 5th 15.8 +0.9 10.5 7th 13.2 27.6 average 48%
Hopetoun North 24.6 -0.8 38.2 17th 16.2 +1.0 9.8 7th 4.2 37.3 low 11%
Jarrahwood 29.6 -0.1 38.8 14th 11.9 -0.8 4.6 6th 40.6 17.2 high 236%
Mandurah 29.2 -0.3 40.3 14th 18.5 -0.5 13.4 6th 80.6 19.2 v high 420%
Manjimup 27.1 -0.1 37.7 14th 13.0 -0.1 9.0 7th 29.8 20.1 high 148%
North Walpole 23.5 -0.9 29.2 14th 14.4 -0.2 12.1 12th 14.6 28.1 average 52%
Rocky Gully 26.2 -1.4 36.2 14th 12.5 -0.2 7.2 7th 15.0 19.6 high 77%
Shannon 25.5 -1.1 36.3 14th 12.5 -0.3 8.1 7th 27.2 16.5 high 165%
Witchcliffe 25.3 -1.3 33.8 14th 13.6 -0.4 8.9 28th 21.2 10.7 high 198%
North Central (district 10)
Bencubbin 33.6 -0.9 40.9 3rd 18.5 +0.3 12.9 6th 7.7 17.1 average 45%
Cunderdin Airfield 34.2 -0.6 42.0 3rd 17.1 -0.2 11.4 11th 42.0 26.2 high 160%
Merredin 34.1 +0.2 42.2 3rd 17.6 -0.2 10.0 11th 22.8 15.0 high 152%
Northam 33.9 -0.3 40.7 2nd 15.8 -1.4 9.9 12th 77.7 12.1 v high 642%
York     37.5 20th 16.3 -0.2 9.5 12th 90.9 33.0 high 275%
South Central (district 10A)
Beverley 34.2 -0.1 40.6 2nd 16.3 0.0 9.4 12th 82.6 13.1 v high 631%
Brookton 32.3 -0.7 39.6 3rd 15.4 -0.2 7.7 12th 47.5 13.6 v high 349%
Corrigin 32.3 -0.3 41.0 3rd 16.2 +0.3 9.2 12th
Hyden 34.2 +0.5 42.8 3rd 15.5 -0.1 8.1 12th 15.4 20.4 average 75%
Jacup 27.4 -0.4 36.9 5th 12.9 -0.2 6.3 7th 17.2 32.6 average 53%
Katanning 29.7 -0.4 36.9 14th 13.5 -0.2 8.4 6th 1.4 22.5 average 6%
Lake Grace 30.8 -0.4 38.5 3rd 14.9 -0.5 10.1 12th 27.0 37.2 average 73%
Narembeen 34.0 0.0 42.0 3rd 16.9 +0.3 11.5 6th 34.1 17.7 high 193%
Narrogin 30.6 -0.4 38.0 3rd 14.8 +0.6 8.4 12th 54.0 13.2 v high 409%
Newdegate Research Station 31.7 +0.5 40.3 3rd 14.0 +0.1 7.8 6th 20.2 19.5 high 104%
Pingelly 31.2 -0.7 38.2 2nd 14.3 -1.3 8.6 12th 33.4 11.4 v high 293%
Ravensthorpe 27.8 -1.2 38.6 5th 14.7 +0.6 9.0 7th 12.4 24.8 average 50%
Wagin 30.7 -0.4 38.6 3rd 14.8 +0.2 9.0 12th 31.8 13.0 v high 245%
Wandering 31.1 -1.1 37.8 2nd 14.8 +0.6 6.8 6th 94.0 21.3 v high 441%
Eucla (district 11)
Eucla 28.7 +2.9 46.0 18th 18.1 +1.4 12.8 13th 59.2 15.8 v high 375%
Eyre 28.3 +1.8 43.5 4th 16.7 +1.4 4.9 8th 29.6 17.5 high 169%
Forrest 32.8 -0.3 45.5 18th 17.9 +1.5 12.7 8th 40.2 25.3 high 159%
Red Rocks Point 26.9 +1.9 45.4 5th 19.1 +0.8 12.5 13th 23.4 25.9 average 90%
South East (district 12)
Bulga Downs 38.2 +0.5 45.0 5th 22.7 +0.3 15.4 31st
Kalgoorlie-Boulder Airport 32.8 -0.8 44.0 5th 18.9 +0.6 13.4 12th 45.4 27.7 high 164%
Laverton Aero 35.3 -0.2 44.9 5th 21.7 +0.2 12.5 30th 89.4 50.8 high 176%
Leinster Aero 36.8 -0.4 45.0 5th 23.3 +0.1 13.0 30th 32.0 39.7 average 81%
Leonora Aero 35.3 -1.7 45.5 5th 22.5 -0.4 13.8 31st 76.6 51.8 high 148%
Munglinup West 28.7 -0.2 40.2 5th 14.7 +0.2 8.4 12th 12.0 42.0 low 29%
Norseman Aero 33.0 +0.6 43.6 5th 16.5 +0.6 7.6 12th 38.2 38.4 average 99%
Southern Cross Airfield 34.2 -0.5 43.8 3rd 18.1 +0.3 12.1 12th 0.4 31.2 low 1%
North East (district 13)
Carnegie 36.0 -2.7 42.2 27th 23.2 -0.7 13.4 31st 122.2 34.8 v high 351%
Giles Meteorological Office 37.7 +0.5 42.7 22nd 23.3 -0.2 17.6 16th 55.8 32.1 high 174%
Telfer Aero 38.6 -1.7 44.1 22nd 25.8 -0.2 17.9 31st 169.2 63.0 v high 269%
Warburton Airfield 37.1 -0.8 43.2 22nd 24.1 +1.1 14.4 31st 22.0 30.7 average 72%
Wiluna 38.9 +0.9 43.0 11th 23.0 +0.1 14.0 30th 81.4 37.4 high 218%
Wiluna Aero 38.9   45.4 5th 25.6   14.1 31st 60.8
Offshore Islands (district 200)
Adele Island 31.3   33.0 3rd 25.5   22.3 9th
Browse Island 30.3   31.5 15th     22.3 25th
Rowley Shoals 30.7   34.4 6th 27.5   22.8 30th
Varanus Island 32.8 +0.9 36.2 24th 27.0 +1.0 24.9 17th 49.4 34.6 high 143%

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 11 am on Thursday 1 February 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
(03) 9669 4057
Enquiries