Western Australia in August 2019: below average rainfall in the west

Rainfall in August 2019 was below to very much below average in western parts of Western Australia. Mean maximum temperatures were above average in the west and south and along the Kimberley coast. The mean minimum temperatures were near average for much of WA but well above average along the Pilbara coast and below average in parts of the State's northeast.

Below average rainfall in the west

  • Rainfall in August 2019 was 39% below average for WA, the driest August since 2014
  • Year to date rainfall was the third-driest year to date (January to August) on record, and driest since 1936 for WA
  • Rainfall in August 2019 was below average, the driest August since 2014 for the South West Land Division (SWLD)
  • Year to date rainfall was the fourth-driest year to date on record, and driest since 2010 for the SWLD
  • Several locations along the Gascoyne coast and the Central West had their driest August on record or driest August for at least 20 years

Above average daytime temperature in the western WA

  • The mean maximum temperature in August 2019 was 1.52 °C above average for WA; for the SWLD, the mean maximum temperature was 1.79 °C above average, and the seventh-warmest August on record
  • The mean maximum temperature for the January to August period was 2.04 °C above average, which was the warmest year to date on record for WA; previous record was 1.61 °C on January to August 2005
  • The mean minimum temperature in August 2019 was 0.23 °C above average for WA
  • The mean minimum temperature for January to August was 0.56 °C above average for WA
  • Many sites near the west coast, especially around Perth had their highest August temperature on record on the 27th or 28th, covering places from Carnavon Airport down to the southwest corner at Cape Leeuwin, as a result of warm northeasterly winds
  • Geraldton Airport recorded 32.0 °C on the 28th, which was Geraldton's highest August temperature on record with records commenced in 1941; previous record was 31.7 °C on 10 August 2014 at Geraldton Airport

Small hail and severe wind gusts

  • A strong cold front produced thunderstorms over the southwest WA on the 5th. Small hail was reported in the Perth northwestern suburbs
  • A strong cold front followed by a cold southwesterly airmass produced severe wind gusts of 100 km/h or higher along the Lower West and Southwest coasts on the 16th and 17th. A layer of snow fell on Bluff Knoll in the Stirling Ranges on the 17th. The State Fire and Emergency Services received more than 20 calls for help

Further information

Media
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Extremes in August 2019
Hottest day 37.9 °C at Kalumburu on the 19th
Warmest days on average 34.6 °C at Kalumburu
Coolest days on average 16.1 °C at Katanning
Coldest day 10.0 °C at Munglinup West on the 17th
Coldest night -4.5 °C at Eyre on the 27th
Coolest nights on average 3.1 °C at York
Warmest nights on average 22.4 °C at Troughton Island
Warmest night 24.7 °C at Troughton Island on the 12th
Warmest on average overall 25.8 °C at Troughton Island
Coolest on average overall 10.3 °C at Wandering
Wettest overall 212.2 mm at Bickley
Driest overall 0 mm at several locations
Wettest day 71.4 mm at Worsley Downs on the 30th
Strongest wind gust 107 km/h at Ocean Reef on the 16th

Maps

Observed Anomaly Decile 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 August daily rainfall

New record
(mm)
Old
record
Years of
record
Tjukayirla 22.0 on the 16th 13.8 on the 26th in 2017 20



Highest August total rainfall for at least 20 years

Observed
(mm)
Most recent
higher
Average for
August
Chesalon 84.4 97.4 in 1992 45.2
Pingelly 86.2 112.8 in 1998 62.3



Record lowest August total rainfall

New record
(mm)
Old
record
Years of
record
Average for
August
Kokardine 3.0 4.6 in 1925 111 41.7
Tenindewa Bindu 1.0 7.2 in 2008 104 39.6
Arundel 3.4 19.8 in 1925 102 74.0
Byron 1.6 6.4 in 1989 50 37.0
Useless Loop 2.8 4.4 in 1989 38 24.5
Nalyerlup 7.0 14.6 in 2012 36 51.6
Morawa Airport 11.4 = 11.4 in 2007 22 33.9

Lowest August total rainfall for at least 20 years

Observed
(mm)
Most recent
lower
Average for
August
Wialki South 13.2 8.5 in 1969* 35.9
Subiaco Treatment Plant 58.6 0.0 in 1984* 106.1
Kondut 19.6 11.6 in 1989* 47.1
Allan Rocks 16.6 =16.6 in 1990* 42.8
Cue 1.6 0.7 in 1995 16.7
Latham 16.0 13.4 in 1995* 38.3
Mount Gibson 5.7 4.1 in 1995* 35.4

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




Record highest August temperature

New record
(°C)
Old
record
Years of
record
Average for
August
Cape Leeuwin 25.5 on the 28th 24.7 on the 6th in 2014 113 16.5
Donnybrook 27.0 on the 28th 26.7 on the 26th in 1949 110 17.3
Perth Airport 29.9 on the 28th 28.3 on the 26th in 1998 76 18.6
Carnarvon Airport 33.6 on the 27th = 33.6 on the 12th in 2014 73 23.1
Dwellingup 27.1 on the 28th 24.9 on the 20th in 2018 60 15.7
Karnet 27.0 on the 28th 25.0 on the 15th in 2015 54 15.9
Badgingarra Research Stn 29.9 on the 28th 27.7 on the 12th in 1976 53 18.2
Brookton 26.8 on the 28th 26.7 on the 29th in 2006 52 16.8
Lancelin 31.0 on the 28th 29.0 on the 12th in 1976 51 19.4
Jurien Bay 30.0 on the 28th 28.2 on the 10th in 2014 50 20.0
Pingelly 26.4 on the 28th 26.1 on the 29th in 2006 49 16.1
Goomalling 29.7 on the 28th 29.5 on the 29th in 2006 43 18.2
Denham 31.5 on the 27th = 31.5 on the 13th in 2014 31 22.5
Jandakot Aero 29.4 on the 28th 27.0 on the 15th in 2015 30 18.7
Bickley 26.6 on the 28th 24.7 on the 25th in 1994 26 16.0
Perth Metro 30.0 on the 28th 27.2 on the 26th in 1998 26 19.0
Swanbourne 30.2 on the 28th 28.0 on the 15th in 2015 26 18.9
Gingin Aero 30.0 on the 28th 28.0 on the 29th in 2006 24 19.1
York 28.5 on the 28th 27.5 on the 29th in 2006 24 17.9
Kalumburu 37.9 on the 19th = 37.9 on the 20th in 2017 21 33.6



Record highest August daily minimum temperature

New record
(°C)
Old
record
Years of
record
Average for
August
Balladonia 15.8 on the 30th 15.5 on the 15th in 1976 55 5.3
Goomalling 14.6 on the 29th = 14.6 on the 3rd in 1983 43 6.3
Gascoyne Junction 22.2 on the 30th 19.0 on the 12th in 2010 42 10.0



Highest August mean daily minimum temperature for at least 20 years

Observed
(°C)
Most recent
higher
Average for
August
Pardoo Station 15.1 15.5 in 1998 13.3



Summary statistics for August 2019

Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2019
Diff
from
average
Highest for
August
2019
Mean for
August
2019
Diff
from
average
Lowest for
August
2019
Total for
August
2019
Average
for
August
Rank of
August
2019
Fraction of
August
average
North Kimberley (district 01)
Doongan 31.4 -0.2 34.9 25th 11.4 -0.8 6.0 30th 0 0.8 lowest 0%
Kalumburu 34.6 +1.0 37.9 19th 14.6 0.0 8.8 15th 0 0.3 lowest 0%
Mount Elizabeth     33.0 25th 8.1 -0.9 4.0 30th 0 1.9 lowest 0%
Troughton Island 29.2 +0.3 31.3 19th 22.4 -0.2 20.0 16th 0.2 0.5 average 40%
Truscott 32.0 +0.3 36.1 19th 18.5 -0.4 15.1 15th 0 0.4 v low 0%
Wyndham Aero 33.7 -0.2 36.2 25th 15.4 -0.7 8.6 15th 0 0 lowest
East Kimberley (district 02)
Argyle Aerodrome 31.8 -0.3 34.8 17th 17.4 +0.1 12.1 14th 0 0.3 lowest 0%
Halls Creek Airport 29.6   33.0 25th 12.6   6.2 15th 0


Kununurra Aero 32.6 -0.1 35.4 25th 13.8 -1.7 7.6 15th 0 0.1 lowest 0%
Warmun 31.6 -0.6 35.0 17th 14.8 +0.1 8.0 15th 0 1.3 lowest 0%
West Kimberley (district 03)
Broome Airport 31.9 +1.6 36.1 25th 14.7 -0.2 10.8 25th 0.2 2.2 low 9%
Curtin Aero 33.2 +0.1 36.2 25th 15.8 +0.1 10.4 6th 0 2.3 lowest 0%
Cygnet Bay 30.1 +0.4 33.5 28th 15.8 +1.1 10.8 24th 0 0.9 lowest 0%
Derby Aero 32.9 +0.3 35.6 25th 14.9 -0.9 10.7 23rd 0 1.1 lowest 0%
Fitzroy Crossing Aero 32.8 -0.5 36.3 26th 13.2 -0.4 9.2 30th 0 2.9 lowest 0%
De Grey (district 04)
Bedout Island 26.2 -0.2 28.6 29th 20.0 -0.1 18.2 19th



Karratha Aero 28.4 +0.1 31.6 31st 15.6 +1.3 11.2 5th 0 4.0 lowest 0%
Legendre Island 25.1   28.1 23rd 18.9   16.9 19th



Mandora 31.8 +0.9 35.3 1st 12.7 -0.5 7.2 4th 0 2.5 lowest 0%
Marble Bar 30.2 0.0 35.7 28th 13.2 +0.2 8.7 23rd 0 0.4 v low 0%
Pardoo Station 30.6 +0.5 34.0 31st 15.1 +1.8 11.0 10th 0 4.6 lowest 0%
Port Hedland Airport 30.0 +0.7 33.2 31st 13.7 +0.5 9.7 22nd 0.8 4.7 average 17%
Roebourne Aero 30.4 +0.1 34.6 30th 13.3 +0.9 7.5 5th 0 0.7 v low 0%
Fortescue (district 05)
Barrow Island Airport 25.0 -0.1 28.6 29th 17.8 +0.1 13.6 10th 1.0 2.5 average 40%
Karijini North 28.0   33.1 29th 13.4   6.0 9th 1.2


Learmonth Airport 27.0 +0.6 29.3 29th 11.7 -0.4 6.4 11th 6.0 11.3 average 53%
Mardie 30.1 +0.5 32.9 31st 13.9 +1.5 10.3 16th 1.4 7.0 average 20%
Onslow Airport 28.1 +0.8 31.7 31st 14.8 +1.2 11.2 10th 0.4 8.3 low 5%
Thevenard Island 26.2 +0.2 28.4 1st 17.9 +0.5 13.9 11th 0.4 2.8 low 14%
Wittenoom 27.8 +0.9 33.3 29th 14.0 +0.8 9.3 9th 0 7.7 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 24.9 +1.8 33.6 27th 11.3 -0.3 6.0 20th 13.2 17.4 average 76%
Denham 23.5 +1.0 31.5 27th 13.1 -0.2 13.0 1st 13.4 21.8 average 61%
Murchison 24.0 +0.9 30.6 28th 7.0 -0.1 2.0 21st 9.0 18.5 average 49%
Shark Bay Airport 25.0 +0.9 32.2 27th 11.0 -0.1 7.4 12th 6.2 20.0 low 31%
East Gascoyne (district 07)
Newman Aero 26.1 0.0 32.3 29th 8.8 +0.9 2.4 19th 3.6 6.5 average 55%
Paraburdoo Aero 28.0 +0.4 34.1 29th 12.2 +1.3 5.0 17th 0 9.9 lowest 0%
Murchison (district 07A)
Meekatharra Airport 23.5 +1.9 30.2 28th 10.2 +1.6 3.6 16th 2.0 10.7 low 19%
Mount Magnet Aero 22.1 +0.8 30.7 28th 8.5 +0.5 2.6 19th 7.8 16.6 average 47%
Paynes Find 21.8 +1.7 31.1 28th 6.1 +0.1 0.2 8th 14.8 27.2 average 54%
North Coast (district 08)
Dalwallinu 19.7 +1.5 29.9 28th 5.2 -0.9 0.6 16th 26.4 39.8 low 66%
Geraldton Airport 22.4   32.0 28th 8.7   4.1 25th 44.2


Kalbarri 23.8 +1.3 31.5 27th 10.3 +0.4 4.1 8th 28.6 47.3 low 60%
Morawa Airport 21.8 +1.6 31.6 28th 6.1 -0.4 0.9 16th 11.4 33.9 lowest 34%
Mullewa 22.3 +2.1 31.3 28th 7.8 +0.6 2.2 16th 27.4 42.1 average 65%
North Island 22.2 +0.6 25.6 28th 15.3 0.0 8.0 12th 17.0 34.8 low 49%
Wongan Hills 19.6 +1.7 29.8 28th 6.9 +0.2 1.8 24th 48.0 52.0 average 92%
Central Coast (district 09)
Badgingarra Research Stn 19.9 +1.7 29.9 28th 7.8 +0.7 3.3 18th 52.4 83.3 low 63%
Bickley 16.9 +0.9 26.6 28th 7.4 -0.2 3.8 24th 212.2 176.8 high 120%
Garden Island HSF 19.0 +0.9 25.9 28th 11.2 0.0 7.4 19th 94.0 95.8 average 98%
Gingin Aero 20.3 +1.2 30.0 28th 6.3 -0.3 0.4 18th 106.0 109.7 average 97%
Jandakot Aero 19.9 +1.2 29.4 28th 7.1 -0.1 1.3 24th 132.4 129.1 average 103%
Jurien Bay 21.9 +1.9 30.0 28th 9.2 -0.2 2.6 22nd 69.8 80.4 average 87%
Lancelin 21.6 +2.2 31.0 28th 9.3 -0.6 5.2 24th 123.3 91.8 high 134%
Millendon (Swan Valley) 20.0   28.5 28th 7.4   2.2 18th 119.8


Pearce RAAF 20.0 +1.6 29.0 28th 8.4 +0.2 2.8 18th 102.4 106.1 average 97%
Perth Airport 20.2 +1.6 29.9 28th 7.8 -0.3 1.9 18th 115.8 118.9 average 97%
Perth Metro 20.2 +1.2 30.0 28th 7.8 -0.5 3.1 18th 114.2 125.5 average 91%
Rottnest Island 18.7 +0.8 24.1 12th 12.5 +0.1 9.3 24th 86.4 87.9 average 98%
Swanbourne 20.0 +1.1 30.2 28th 10.3 +0.2 5.9 24th 121.6 119.2 average 102%
South Coast (district 09A)
Albany 17.9 +1.6 25.5 29th 9.6 +1.2 6.0 26th 119.1 126.2 average 94%
Albany Airport 17.9   25.1 29th 7.4   2.2 21st 139.2


Bridgetown 17.3 +0.9 22.8 28th 4.3 -0.8 -0.5 21st 119.6 122.4 average 98%
Bunbury 18.9 +1.3 23.8 28th 6.4 -1.3 1.2 24th 91.8 120.2 low 76%
Busselton Aero 18.0 +0.7 21.7 28th 6.5 -0.8 1.1 24th 97.6 108.4 average 90%
Cape Leeuwin 18.3 +1.8 25.5 28th 11.9 +0.7 9.7 23rd 125.6 135.9 average 92%
Cape Naturaliste 18.1 +1.6 21.7 29th 10.2 +0.1 5.9 24th 98.2 112.6 average 87%
Collie East 18.4 +1.3 27.2 28th 3.2 -1.6 -0.5 22nd 70.4 118.0 low 60%
Donnybrook 19.1 +1.8 27.0 28th     3.0 7th 140.8 148.9 average 95%
Dwellingup 17.8 +2.1 27.1 28th 5.5 0.0 1.2 19th 161.0 194.5 average 83%
Esperance 18.6 +0.6 31.1 29th 8.6 0.0 3.3 26th 100.4 84.6 average 119%
Esperance Aero 17.9 +0.5 29.8 29th 7.6 -0.1 4.8 27th 92.8 71.5 high 130%
Hopetoun North 18.8 +0.1 29.3 29th 7.9 +0.1 2.8 27th 76.4 56.0 high 136%
Jarrahwood 18.7 +1.9 24.0 28th 4.3 -0.9 -1.2 24th 120.2 147.2 low 82%
Mandurah 18.7 +0.7 23.9 28th 10.8 -0.2 7.2 7th 98.2 97.7 average 101%
Manjimup 17.0 +1.9 22.4 28th 6.9 +0.4 2.2 24th 128.8 145.4 average 89%
North Walpole 17.7 +1.1 24.2 28th 9.4 +0.3 5.7 27th 173.4 157.2 average 110%
Rocky Gully 16.5 +1.1 22.2 22nd 6.9 +0.1 3.4 26th 117.6 91.1 high 129%
Shannon 16.1 +0.7 22.0 28th 6.4 -0.6 1.8 26th 148.0 136.1 average 109%
Witchcliffe 17.4 +0.7 21.7 28th 7.6 -0.6 2.7 26th 119.6 157.4 low 76%
North Central (district 10)
Bencubbin 18.9 +1.2 28.4 28th     3.5 27th 28.7 37.5 average 77%
Cunderdin Airfield 19.1 +1.2 29.0 28th 4.2 -0.3 -0.3 18th 32.2 41.8 low 77%
Merredin 18.6 +1.2 28.0 28th 6.4 +0.9 0.0 18th 51.2 39.3 high 130%
Northam 19.2 +1.2 28.2 28th 4.4 -1.2 0.2 22nd 46.4 60.9 average 76%
York 19.2 +1.3 28.5 28th 3.1 -0.9 -0.5 18th 65.5 58.7 average 112%
South Central (district 10A)
Beverley 18.5 +0.7 24.4 22nd 4.8 -0.3 0.6 18th 79.8 59.0 high 135%
Brookton 17.9 +1.1 26.8 28th 4.3 -0.3 -0.2 18th 78.6 62.4 high 126%
Corrigin 17.8 +1.4 27.1 28th 4.5 -0.3 -0.4 1st 49.6 47.8 average 104%
Hyden 19.2 +1.6 28.5 28th 4.7 0.0 0.0 19th 42.0 41.3 average 102%
Jacup 17.7 +0.9 27.2 28th 5.2 -0.5 2.1 26th 48.8 51.8 average 94%
Katanning 16.1 +0.7 23.6 28th 5.5 -0.5 2.0 19th 59.0 59.9 average 98%
Lake Grace 17.5 +0.7 26.6 28th 5.3 -0.4 1.1 19th 46.0 37.6 average 122%
Narembeen 18.7 +1.0 28.1 28th 5.4 0.0 0.8 8th 51.7 42.5 high 122%
Narrogin 17.0 +1.7 25.5 28th 5.1 -0.1 0.0 17th 66.8 67.9 average 98%
Newdegate Research Station 17.0 +0.7 25.7 28th 3.7 -0.6 -0.5 26th 58.2 44.9 high 130%
Pingelly 17.3 +1.2 26.4 28th 6.0 +0.3 1.6 18th 86.2 62.3 high 138%
Ravensthorpe 18.3 +1.0 27.0 28th     3.0 26th 69.2 45.3 high 153%
Wagin 17.2 +1.1 25.1 28th 5.5 -0.2 1.0 26th 63.0 56.9 average 111%
Wandering 17.3 +0.8 24.9 28th 3.2 -0.9 -0.5 20th 104.4 94.7 average 110%
Eucla (district 11)
Eucla 19.7 +0.5 33.5 30th 7.7 +0.2 1.1 20th 29.8 26.4 average 113%
Eyre 20.8 +1.3 31.8 30th 4.0 -2.0 -4.5 27th 36.0 29.7 average 121%
Forrest 21.0 0.0 32.2 30th 5.0 -0.9 0.2 3rd 5.0 13.4 low 37%
Red Rocks Point 19.4 -0.1 31.7 30th 7.9 -0.3 3.2 28th 1.8 39.9 v low 5%
South East (district 12)
Bulga Downs 22.3 +0.3 30.8 28th 6.6 +0.6 0.8 9th



Kalgoorlie-Boulder Airport 19.6 +0.9 30.4 29th 7.2 +1.5 1.8 8th 20.6 21.3 average 97%
Laverton Aero 21.7 +0.9 31.0 29th 8.1 +0.9 -0.1 8th 2.0 9.9 average 20%
Leinster Aero 21.9 +0.2 30.4 28th 7.4 -0.2 0.8 18th 7.2 8.8 average 82%
Leonora Aero 22.1 +0.4 30.7 29th 7.5 +0.1 0.9 18th 6.2 10.9 average 57%
Munglinup West 18.4 +0.4 30.5 29th 6.7 -0.1 3.1 25th 73.0 47.2 high 155%
Norseman Aero 19.2 -0.1 31.4 29th 4.0 -0.4 -2.2 19th 36.2 23.7 high 153%
Salmon Gums Res.Stn. 18.0 +0.6 30.6 29th 4.0 -0.7 -3.5 26th 43.2 34.3 high 126%
Southern Cross Airfield 19.4 +0.9 28.3 28th 4.5 +0.7 -0.9 20th 20.6 30.5 average 68%
North East (district 13)
Carnegie 24.3 +0.2 31.6 30th 7.2 -0.1 -0.6 4th 3.2 6.6 average 48%
Giles Meteorological Office 23.0 +0.2 29.6 31st 7.9 -0.8 2.3 3rd 0 9.3 lowest 0%
Telfer Aero 28.5 +0.1 34.5 28th 12.4 -0.1 8.1 3rd 0.8 4.6 high 17%
Warburton Airfield 23.6 +0.3 32.0 31st 8.0 +0.8 0.3 9th 3.2 8.7 average 37%
Wiluna 22.5 +0.6 27.5 13th 6.8 0.0 1.0 8th 9.4 9.9 average 95%
Wiluna Aero 23.3   31.2 28th 6.8   0.6 8th 1.0


Offshore Islands (district 200)
Adele Island 28.2   29.6 29th 23.4   22.3 4th



Browse Island 28.1   29.3 29th 24.8   23.4 31st



Rowley Shoals 25.3   26.9 15th 23.1   21.9 4th




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 8 pm on Sunday 1 September 2019. 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

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Climate