Western Australia in winter 2018: Above average daytime temperatures

Winter rainfall was slightly below average for Western Australia as a whole, but it was slightly above average and the wettest winter since 2009 for the South West Land Division. Mean maximum temperatures were above average across most of the State. Mean minimum temperatures were below average in the northeast, but above average in the southern parts.

Rain

  • Winter rainfall was slightly below average for WA as a whole
  • Winter rainfall was slightly above average and the wettest winter since 2009 for the South West Land Division (SWLD) as a whole
  • Many sites in the SWLD and south Gascoyne coast either had their wettest winter on record, or wettest winter over 20 years
  • Two cloudbands produced widespread moderate to heavy rainfall to the western parts of WA in early June and early July; Denham in the Gascoyne coast recorded its wettest winter day with 98.0 mm on 4 June while Calingiri in the Central Wheat Belt recorded its wettest winter day with 52.4 mm on 3 July

Temperatures

  • Mean maximum temperature was a degree above average for WA as a whole
  • Dwellingup in the Lower West district recorded 24.9 °C on 20 August which was its winter highest temperature record
  • Mean minimum temperature was slightly below average, and the lowest since 2014 for WA as a whole
  • Warm northerly winds ahead of cold front produced very warm overnight temperatures over western part of WA in early June; a number of winter records were reported on the 4th or 5th
  • Cold mornings with daily minima below 10 °C were observed in the Kimberley in the mid-August that saw Kununurra Aero and Curtin Aero recorded their lowest winter temperature on record

Further information

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Extremes in winter 2018
Hottest day 36.8 °C at Kalumburu on 27 Aug
Warmest days on average 33.9 °C at Kalumburu
Coolest days on average 15.1 °C at Katanning
15.1 °C at Shannon
Coldest day 8.4 °C at Shannon on 9 Aug
Coldest night -4.0 °C at Eyre on 11 Jul
Coolest nights on average 4.3 °C at Collie East
Warmest nights on average 22.7 °C at Troughton Island
Warmest night 26.4 °C at Browse Island on 13 Jun
Warmest on average overall 26.1 °C at Troughton Island
Coolest on average overall 10.5 °C at Collie East
10.5 °C at Narrogin
10.5 °C at Newdegate Research Station
10.5 °C at Wandering
Wettest overall 803.8 mm at Mount William
Wettest day 98.8 mm at Mount Augustus Airstrip on 6 Jun
Strongest wind gust 130 km/h at Cape Leeuwin on 2 Jul

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 winter daily rainfall
New record
(mm)
Old
record
Years of
record
Denham 98.0 on 5 Jun 96.5 on 27 Jun 1965 105
Calingiri 52.4 on 3 Jul 50.8 on 10 Jun 1945 80
Warradarge 92.0 on 3 Jul 68.6 on 31 Jul 2015 39
Steep Point 86.0 on 5 Jun 72.6 on 3 Jun 2005 23



Record highest winter total rainfall
New record
(mm)
Old
record
Years of
record
Average for
winter
Windy Harbour 668.5 663.6 in 1996 32 536.5
Nunile 303.0 293.4 in 1996 27 206.8
Dalwallinu 223.6 191.2 in 2015 22 121.9
Morawa Airport 200.6 173.8 in 1998 21 118.5
Bridgetown 492.0 473.2 in 2009 20 358.0

Highest winter total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
winter
Kondut 210.5 262.6 in 1983* 162.0
Jarrahdale 752.6 799.0 in 1983* 634.6
Lynton 302.0 323.7 in 1983* 231.6
Konnongorring 218.7 244.7 in 1995 173.9
Oake Marsh Farm 289.4 391.3 in 1989* 232.0
Bickley 781.2 877.7 in 1996 589.4
Nangeenan 170.6 191.6 in 1996 132.0
Narrogin 267.9 323.0 in 1996 239.3
Newbicup 360.2 467.2 in 1996 294.8
Perth Airport 482.0 567.4 in 1996 430.5
Swanbourne 486.4 496.0 in 1996 393.2
Wattening 247.8 270.2 in 1996 219.1
Wongan Hills 242.8 247.8 in 1995* 191.0
Northam 262.4 288.1 in 1996* 222.4
Pearce RAAF 461.8 510.0 in 1996* 369.8
Wundi 267.4 350.8 in 1996* 201.0
Barberton 285.6 322.6 in 1995* 233.1
Berkshire Valley 247.4 249.8 in 1998 222.2
Booralee 163.4 193.8 in 1996* 133.0
Denham 164.4 179.4 in 1998 115.9
Happy Valley 195.6 222.6 in 1998 159.5
Highfields 192.9 264.8 in 1996* 169.8
Noongaar 158.6 162.7 in 1998 131.8
Pemberton 672.4 737.4 in 1996* 567.9
Wagin 213.0 246.9 in 1998 198.1

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




Record lowest winter total rainfall
New record
(mm)
Old
record
Years of
record
Average for
winter
Gingin 133.4 203.4 in 1914 121 402.3
Mordetta 66.6 67.6 in 2002 43 137.1



Record highest winter temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Dwellingup 24.9 on 20 Aug 24.7 on 26 Aug 1998 61 15.6



Record highest winter daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Onslow Airport 23.3 on 5 Jun = 23.3 on 11 Jun 2013 53 13.6
Mount Magnet Aero 17.8 on 4 Jun 17.5 on 11 Aug 2014 24 7.8
Thevenard Island 24.7 on 5 Jun = 24.7 on 21 Jun 2016 24 17.8
Newdegate Research Station 13.5 on 5 Jun 13.4 on 22 Aug 2011 23 4.5
Barrow Island Airport 24.3 on 5 Jun = 24.3 on 4 Jun 2016 20 18.0
Varanus Island 25.3 on 5 Jun 25.2 on 4 Jun 2016 20 20.3



Record lowest winter temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Kununurra Aero 6.1 on 15 Aug 6.3 on 17 Aug 2014 33 15.5
Curtin Aero 4.2 on 16 Aug 6.2 on 8 Jul 2012 27 16.0
Jacup -1.2 on 18 Aug -1.0 on 30 Aug 1995 26 5.9
Thevenard Island 10.9 on 8 Aug = 10.9 on 28 Jul 2012 24 17.8



Lowest winter mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Onslow Airport 20.1 19.8 in 1998 19.9



Summary statistics for winter 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
winter
2018
Diff
from
average
Highest for
winter
2018
Mean for
winter
2018
Diff
from
average
Lowest for
winter
2018
Total for
winter
2018
Average
for
winter
Rank of
winter
2018
Fraction of
winter
average
North Kimberley (district 01)
Doongan 30.7 +0.5 34.0 28 Aug 10.2 -1.4 4.8 9 Aug 0 6.1 lowest 0%
Kalumburu 33.9 +1.4 36.8 27 Aug 12.9 -1.5 6.8 15 Aug 0 4.4 lowest 0%
Troughton Island 29.4 +0.7 31.2 2 Jun 22.7 -0.1 19.9 16 Aug 0 9.7 lowest 0%
Truscott 31.4 +0.5 33.5 7 Jul 18.5 -0.3 13.8 16 Aug 0.2 5.5 low 4%
Wyndham Aero 33.1 +0.6 36.6 27 Aug 15.0 -0.8 8.5 15 Aug 0 6.0 lowest 0%
East Kimberley (district 02)
Argyle Aerodrome 31.1 +0.6 34.9 12 Jun 16.0 -0.5 9.8 14 Aug 0.2 5.6 average 4%
Halls Creek Airport 28.7   34.3 12 Jun 10.2   2.4 15 Aug 0.2
Kununurra Aero 32.0 +0.7 35.7 29 Aug 12.7 -2.8 6.1 15 Aug 0.2 4.8 average 4%
Warmun 29.2 -1.3 35.2 11 Jun 11.6 -2.2 5.3 14 Aug 0 12.0 lowest 0%
West Kimberley (district 03)
Bidyadanga 30.7 +0.5 35.5 19 Aug 14.5 -0.3 8.5 4 Aug 1.6 30.2 low 5%
Broome Airport 29.7 +0.2 34.7 19 Aug 12.9 -1.7 5.7 4 Aug 1.8 27.6 low 7%
Curtin Aero 31.5 -0.2 35.1 19 Aug 14.4 -1.6 4.2 16 Aug 0 18.2 lowest 0%
Cygnet Bay     32.0 20 Aug 14.3 -1.1 8.0 16 Aug 0 31.8 lowest 0%
Fitzroy Crossing Aero 31.8 +0.2 36.7 11 Jun 11.3 -1.6 4.5 15 Aug 0 16.8 lowest 0%
De Grey (district 04)
Bedout Island 25.2 -0.6 30.4 5 Jun 19.8 -0.5 16.7 16 Aug
Karratha Aero 26.9 -0.2 31.5 27 Aug 14.2 -0.2 8.0 3 Aug 67.2 53.4 high 126%
Legendre Island 25.3   29.3 30 Jul 18.1   14.4 7 Aug
Mandora 30.0 +0.4 35.6 19 Aug 12.0 -1.3 3.2 8 Aug 0.4 28.4 low 1%
Marble Bar 28.2 0.0 33.2 27 Aug 12.2 -0.7 5.9 14 Aug 31.6 40.8 average 77%
Port Hedland Airport 28.6 +0.6 33.2 20 Aug 12.9 -0.4 6.6 7 Aug 59.4 39.1 high 152%
Roebourne Aero 28.5 -0.3 33.1 18 Aug 12.2 -0.6 5.1 7 Aug 40.4 44.3 average 91%
Fortescue (district 05)
Barrow Island Airport 24.1 -0.3 29.5 5 Jun 17.6 -0.4 13.4 8 Aug 51.0 54.6 average 93%
Learmonth Airport 25.2 0.0 30.9 17 Aug 11.6 -0.6 5.2 13 Aug 98.0 76.6 average 128%
Mardie 28.3 -0.2 33.9 20 Aug 12.9 +0.1 6.8 12 Aug 41.0 58.5 average 70%
Onslow Airport 26.5 +0.3 31.5 3 Jun 13.7 +0.1 8.2 7 Aug 100.6 74.8 high 134%
Thevenard Island 25.4 -0.1 30.2 1 Jun 17.3 -0.5 10.9 8 Aug 64.0 59.1 average 108%
Wittenoom 25.5 +0.2 31.0 21 Aug 12.2 -0.3 6.4 7 Aug 88.6 51.3 high 173%
West Gascoyne (district 06)
Carnarvon Airport 23.6 +0.6 31.6 3 Jun 11.3 -0.3 4.4 12 Aug 81.6 106.5 average 77%
Denham 22.4 0.0 28.0 19 Aug 13.1 -0.2 9.0 16 Aug 164.4 115.9 high 142%
Shark Bay Airport 23.1 -0.5 31.8 19 Aug 10.8 -0.3 5.0 12 Aug 171.2 96.7 v high 177%
East Gascoyne (district 07)
Newman Aero 24.1 +0.1 30.3 28 Aug 7.3 +0.1 1.0 12 Aug 54.8 36.8 high 149%
Paraburdoo Aero 25.5 -0.4 31.5 20 Aug 9.8 -0.9 3.5 4 Aug 58.0 48.0 high 121%
Murchison (district 07A)
Meekatharra Airport 21.4 +1.2 29.4 20 Aug 8.4 +0.1 2.2 6 Aug 31.8 61.5 low 52%
Mount Magnet Aero 20.2 +0.2 29.8 20 Aug 7.9 +0.1 1.6 11 Aug 80.6 66.7 high 121%
Paynes Find 19.7 +0.4 29.6 19 Aug 6.4 +0.4 0.0 11 Aug 107.8 102.2 average 105%
North Coast (district 08)
Dalwallinu 17.5 -0.4 26.2 3 Jun 6.8 +0.4 1.4 12 Aug 223.6 121.9 highest 183%
Geraldton Airport 20.4   26.8 19 Aug 9.7   2.6 12 Aug
Kalbarri 22.4 0.0 29.8 19 Aug 10.5 +0.3 2.6 11 Aug 181.7 195.0 average 93%
Morawa Airport 19.0 -0.7 28.1 20 Aug 7.0 +0.3 1.4 11 Aug 200.6 118.5 highest 169%
Mullewa 19.7 0.0 28.4 20 Aug 7.8 +0.2 3.1 11 Aug 165.1 164.9 average 100%
North Island 21.7 0.0 25.9 17 Jun 15.6 -0.1 7.3 12 Jul 123.8 163.7 low 76%
Wongan Hills 17.8 0.0 26.0 20 Aug 7.2 +0.2 2.5 30 Jun 242.8 191.0 high 127%
Central Coast (district 09)
Badgingarra Research Stn 17.9 -0.3 25.8 19 Aug 8.0 +0.4 3.2 10 Aug 223.2 289.3 low 77%
Bickley 15.5 -0.2 22.2 20 Aug 7.7 +0.1 2.8 10 Aug 781.2 589.4 high 133%
Garden Island HSF 18.1 -0.2 23.3 20 Aug 11.6 +0.1 5.6 19 Aug 389.8 318.1 high 123%
Gingin Aero 19.0 0.0 24.6 20 Aug 7.2 +0.5 0.3 11 Aug 370.4 346.9 average 107%
Jandakot Aero 18.6 0.0 25.8 20 Aug 8.0 +0.8 1.4 12 Aug 516.4 455.0 high 113%
Jurien Bay 20.2 +0.1 24.4 24 Jun 10.2 +0.6 2.9 24 Aug 339.6 302.9 average 112%
Lancelin 19.9 +0.3 26.4 19 Aug 10.4 +0.2 5.0 24 Aug 361.4 329.4 average 110%
Millendon (Swan Valley) 18.8   24.3 19 Aug 8.3   2.4 11 Aug 411.0
Pearce RAAF 18.9 +0.5 24.3 20 Aug 8.9 +0.3 2.6 11 Aug 461.8 369.8 high 125%
Perth Airport 19.0 +0.5 25.3 20 Aug 8.7 +0.4 2.5 10 Aug 482.0 430.5 high 112%
Perth Metro 18.9 -0.1 25.3 20 Aug 8.7 +0.5 2.8 11 Aug 464.4 396.4 high 117%
Rottnest Island 18.3 +0.2 22.3 20 Aug 12.9 +0.2 6.8 10 Aug 320.4 303.0 average 106%
Swanbourne 18.7 -0.2 25.7 20 Aug 10.5 +0.4 5.2 11 Aug 486.4 393.2 high 124%
South Coast (district 09A)
Albany 16.8 +0.5 23.1 13 Aug 9.4 +0.8 5.4 19 Aug 395.6 400.6 average 99%
Albany Airport 17.0   22.6 20 Aug 7.6   1.1 18 Aug
Bridgetown 16.2 -0.1 21.3 20 Aug 4.9 0.0 -1.7 18 Aug 492.0 358.0 highest 137%
Bunbury 17.7 -0.1 22.3 20 Aug 7.7 +0.1 2.2 10 Aug 489.4 398.2 high 123%
Busselton Aero 17.1 -0.2 20.7 2 Jul 7.9 +0.7 2.4 18 Aug 365.8 372.4 average 98%
Cape Leeuwin 17.5 +0.7 22.1 20 Aug 12.2 +0.6 7.5 29 Aug 419.6 490.7 low 86%
Cape Naturaliste 17.5 +0.8 21.3 2 Jul 10.9 +0.2 5.0 10 Aug 392.8 434.3 average 90%
Collie East 16.8 -0.1 24.9 20 Aug 4.3 0.0 -1.8 18 Aug 438.6 359.1 high 122%
Donnybrook 17.5 +0.4 22.5 17 Jun 6.7 +0.5 2.0 13 Aug 585.0 522.8 high 112%
Dwellingup 16.2 +0.6 24.9 20 Aug 6.0 +0.2 -0.1 11 Aug
Esperance 18.4 +0.7 26.4 4 Jun 9.2 +0.5 4.8 10 Jul
Esperance Aero 17.8 +0.8 25.8 4 Jun 8.2 +0.3 4.3 2 Jun 275.2 215.6 high 128%
Hopetoun North 18.6 0.0 27.6 4 Jun 8.4 +0.4 3.1 19 Aug 186.0 173.4 average 107%
Jarrahwood 17.2 +0.3 22.0 19 Aug 4.8 -0.4 -1.5 18 Aug 623.4 487.3 high 128%
Mandurah 17.8 -0.3 21.8 10 Jul 11.1 0.0 5.7 10 Aug 403.8 336.3 v high 120%
Manjimup 15.4 +0.5 21.8 20 Aug 7.0 +0.2 1.9 18 Aug 479.2 479.6 average 100%
North Walpole 16.5 0.0 21.9 20 Aug 9.1 -0.2 2.7 18 Aug 526.4 493.7 average 107%
Shannon 15.1 -0.2 21.3 20 Aug 6.9 -0.1 0.5 18 Aug 598.4 475.5 v high 126%
Witchcliffe 16.7 -0.2 21.1 20 Aug     0.9 18 Aug
North Central (district 10)
Bencubbin 17.0 -0.2 26.2 20 Aug 6.1 -0.3 0.4 11 Aug 115.1 130.8 average 88%
Cunderdin Airfield 17.4 -0.4 23.4 20 Aug 5.8 +0.8 -0.1 11 Aug 165.8 127.7 high 130%
Merredin 17.4 +0.3 25.2 3 Jun 6.5 +0.6 0.7 6 Jul 152.6 138.2 average 110%
Northam 17.9 +0.3 23.0 17 Jun 5.5 -0.3 0.2 30 Jun 262.4 222.4 high 118%
York 18.0 +0.2 23.0 17 Jun 4.8 +0.7 -1.0 13 Aug 231.6 187.0 high 124%
South Central (district 10A)
Beverley 17.5 0.0 23.2 20 Aug 5.3 -0.1 0.2 11 Aug 190.8 212.8 average 90%
Brookton 16.9 +0.2 22.1 21 Aug 4.6 -0.3 -0.5 12 Aug 208.5 232.2 average 90%
Hyden 17.7 +0.5 26.3 20 Aug 4.9 -0.1 -1.0 30 Jun 164.4 137.4 high 120%
Jacup 16.9 +0.5 24.5 4 Jun 6.0 +0.1 -1.2 18 Aug 146.6 145.3 average 101%
Katanning 15.1 -0.3 21.4 20 Aug 6.4 +0.2 0.2 18 Aug 189.4 181.3 average 104%
Lake Grace 16.6 +0.2 25.8 20 Aug 6.0 +0.2 -0.5 18 Aug
Narembeen 17.6 +0.3 25.0 20 Aug 6.2 +0.5 0.1 11 Aug 181.4 142.9 high 127%
Narrogin 16.0 +0.8 23.1 20 Aug 4.9 -0.7 0.4 18 Aug 267.9 239.3 high 112%
Newdegate Research Station 16.3 +0.2 23.9 4 Jun 4.8 +0.3 -2.6 18 Aug 122.2 142.3 average 86%
Pingelly 16.5 +0.5 22.5 20 Aug 5.0 -0.9 0.2 6 Jul 210.6 224.4 average 94%
Ravensthorpe 18.1 +1.1 26.0 4 Jun 7.5 +0.4 2.0 12 Aug 100.5 135.3 low 74%
Wagin 15.8 -0.2 23.5 20 Aug 6.0 +0.1 0.0 18 Aug 213.0 198.1 average 108%
Wandering 16.3 -0.1 24.0 20 Aug 4.7 +0.5 -0.9 18 Aug 381.8 267.9 v high 143%
Eucla (district 11)
Eucla 19.6 +0.9 30.6 29 Aug 8.0 +0.4 2.7 30 Jun 99.4 81.6 high 122%
Eyre 20.2 +1.3 30.0 3 Jul 5.6 -0.5 -4.0 11 Jul 106.8 104.7 average 102%
Forrest 20.3 +0.7 30.5 28 Aug 5.7 +0.1 -0.3 11 Jul 47.0 44.1 average 107%
Red Rocks Point 19.1 0.0 29.5 3 Jul 8.4 +0.2 1.8 20 Aug 187.4 115.5 v high 162%
South East (district 12)
Bulga Downs 20.5 +0.1 28.7 20 Aug 5.0 -0.7 -0.5 6 Aug
Kalgoorlie-Boulder Airport 18.7 +1.0 26.5 27 Aug 6.7 +1.0 0.2 6 Jul 49.2 72.9 average 67%
Laverton Aero 20.1 +0.9 27.9 21 Aug 6.3 -0.4 -1.5 6 Aug 35.0 41.7 average 84%
Leinster Aero 20.4 +0.6 28.1 20 Aug 6.6 -0.4 -0.4 6 Aug 28.6 42.5 average 67%
Leonora Aero 20.6 +0.6 27.8 27 Aug 6.0 -0.9 -0.6 6 Jul 32.0 43.2 low 74%
Munglinup West 17.8 +0.4 25.8 4 Jun 7.0 -0.1 2.1 19 Aug 142.8 127.2 high 112%
Norseman Aero 18.7 +0.5 26.3 27 Aug 4.6 +0.2 -3.7 18 Aug 48.4 62.3 average 78%
Salmon Gums Res.Stn. 17.8 +1.0 25.9 27 Aug 5.5 +0.5 -2.4 11 Jul 110.2 109.0 average 101%
Southern Cross Airfield 17.6 -0.1 26.5 20 Aug 4.7 +0.8 -1.1 11 Aug 122.0 92.9 high 131%
North East (district 13)
Carnegie 22.7 +0.5 30.2 28 Aug 6.2 -0.6 -0.8 28 Jun 15.2 34.0 average 45%
Giles Meteorological Office 22.4 +1.4 30.3 28 Aug 7.1 -0.8 -1.4 3 Aug 0.2 38.9 v low 1%
Telfer Aero 26.9 +0.5 32.8 28 Aug 10.6 -1.1 2.6 6 Aug 1.6 29.6 low 5%
Warburton Airfield 22.6 +1.0 31.8 28 Aug 6.0 -0.5 -3.4 6 Aug 8.0 39.9 low 20%
Wiluna 21.6 +1.2 28.5 27 Aug 6.0 -0.3 -1.0 6 Aug 37.8 48.5 average 78%
Wiluna Aero 21.6   28.9 20 Aug 6.6   -0.7 6 Aug 41.4
Offshore Islands (district 200)
Adele Island 27.7   29.4 19 Aug     20.8 13 Jul
Rowley Shoals 25.7   28.1 9 Jun     19.5 4 Aug

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 9 am on Monday 3 September 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