Western Australia in May 2019: very dry, warm days in the north and cool nights in the south

May rainfall was below average for most of Western Australia apart from the northeast and southeast. It was the third-driest May on record, and driest since 1983 for WA. Mean maximum temperatures were above average for most of the State except in the far south. It was the State's sixth-warmest May on record, and warmest since 2008. Mean minimum temperatures were below average in the northwest Gascoyne and southern half of the State, whilst areas of above average mean maxima were confined in parts of the Kimberley and Pilbara. The statewide mean minimum temperature was about one degree below average.

Below average rainfall for most of WA

  • Monthly rainfall were very much below average in the State's west; rainfall totals ranged from 1-10 mm in the Central West district, to 25-50 mm in the southwest WA coast
  • For WA, it was the third-driest May on record, and the driest since 1983
  • For the SWLD, it was the third-driest May on record, and the driest since 1964
  • It was driest May on record or driest May for at least 20 years for numerous sites in the South West Land Division (SWLD) and adjacent Central West district
  • For sites with over 70 years of rainfall observations in the SWLD, May 2019 was comparable to previous record dry Mays in 1964, 1948 and 1949

Warm days in the north; cool nights in the south

  • For Western Australia, the mean maximum temperature was 1.88 °C above average, which was the sixth-warmest May on record, and the warmest since 2008
  • Unseasonably hot temperatures were recorded in the north at the first and third week of May; Karratha Aero (Pilbara coast) had its May temperature record on the 6th, and Mandora (west Kimberley coast) recorded national late season high temperature with 38.8 °C on the 22th
  • Broome Airport and several other sites in the Kimberley and Pilbara had their warmest May on record in terms of maximum temperatures
  • Wet conditions and cold southerly winds resulted in daytime temperatures in the low teens in inland south on the 17th and 18th; a daily maximum temperature of 11.0 °C at Ravensthorpe on the 17th was WA's coldest May day for six years when a dozen sites recorded 11.0 °C or lower daily maxima on 30 May 2013
  • For Western Australia, the mean minimum temperature was 0.97 °C below average, and the coolest May since 2012
  • Mean minimum temperatures were around 3 °C to 10 °C in the SWLD, with many sites experienced their coolest May on record or their coolest May since 1968
  • Nights were particularly cold in the south on the 18th and 19th with some sites recorded their lowest May temperature on record; Southern Cross Airfield's new record (-3.4 °C on the 19th) was WA's lowest May temperature for Severn years when Wandering recorded -3.4 °C on 25 May 2012

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Extremes in May 2019
Hottest day 39.7 °C at Mandora on the 5th
Warmest days on average 35.8 °C at Derby Aero
Coolest days on average 17.3 °C at Shannon
Coldest day 11.0 °C at Ravensthorpe on the 17th
Coldest night -3.4 °C at Southern Cross Airfield on the 19th
Coolest nights on average 3.2 °C at Collie East
Warmest nights on average 27.2 °C at Browse Island
Warmest night 28.7 °C at Browse Island on the 3rd
Warmest on average overall 28.6 °C at Browse Island
Coolest on average overall 11.5 °C at Collie East
Wettest overall 75.8 mm at North Walpole
Driest overall 0 mm at several locations
Wettest day 31.4 mm at Ellenbrae on the 3rd
Strongest wind gust 102 km/h at Cape Leeuwin on the 5th

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 lowest May total rainfall

New record
(mm)
Old
record
Years of
record
Average for
May
Albany 31.0 35.8 in 1996 143 114.8
Greenbushes 29.4 34.2 in 1948 127 122.9
Cape Leeuwin 34.6 35.0 in 2006 123 136.8
Geraldton Town 1.6 4.0 in 2006 121 66.9
Cape Naturaliste 23.2 33.8 in 2006 115 113.6
Three Springs 0.6 2.5 in 1948 113 48.8
Manarra 1.5 2.3 in 1949 100 51.6
Maybrook 8.0 8.2 in 2000 98 63.6
Pingrup South 2.1 4.0 in 1961 84 39.5
Eradu 0.6 1.8 in 1964 79 48.4
Perth Airport 12.2 15.0 in 1964 76 97.4
Wanneroo 18.4 22.5 in 1972 72 107.9
Glenrose 0.0 5.1 in 2000 69 50.1
Warner Glen 43.4 48.8 in 2006 69 136.8
Coolangatta 0.6 6.4 in 1992 68 46.1
Wokalup 17.6 29.5 in 2006 67 132.8
Gidgegannup 20.0 27.4 in 1997 58 107.9
Karnet 26.2 36.7 in 2000 55 140.3
Lancelin 15.3 16.4 in 1983 53 78.9
Roleystone 23.2 41.0 in 2006 52 120.5
Bickley 28.0 47.0 in 1983 51 129.8
Jurien Bay 14.3 14.8 in 1992 51 75.0
Kalbarri 1.2 2.3 in 1985 48 53.2
Lake Nammen 7.4 21.0 in 1989 47 77.6
Jandakot Aero 24.4 33.6 in 1983 45 104.8
Jarrahwood 39.6 43.6 in 2000 43 124.3
Wundi 3.0 6.2 in 2006 42 55.2
Oldfield 2.8 16.0 in 2009 41 55.8
Arena 1.4 8.4 in 2000 39 55.8
Maida Vale 15.6 26.2 in 1983 37 99.6
Perth Metro 17.8 26.4 in 2000 27 86.8
Rottnest Island 12.4 17.6 in 2006 26 71.7
Swanbourne 15.2 22.0 in 2006 25 87.7
Worsley Downs 45.8 59.4 in 2010 25 158.7
Gingin Aero 12.4 27.2 in 2006 24 72.6
Strawberry 5.6 7.2 in 2008 24 54.2
Dalwallinu 4.0 5.0 in 2008 23 34.1
Morawa Airport 0.6 2.2 in 2000 23 35.1
Southern Cross Airfield 2.2 = 2.2 in 2000 23 26.8
Waeel 7.4 8.4 in 2017 23 36.0
Bridgetown 25.2 33.8 in 2006 22 95.9
Cunderdin Airfield 7.6 8.8 in 2017 22 30.1
Steep Point 0.0 2.8 in 2012 22 35.9
Busselton Aero 24.8 40.8 in 2000 20 100.3
* note: Geraldton Airport rainfall data are the composite of the current site(009315) and Geraldton Airport comparison(009051)

Lowest May total rainfall for at least 20 years

Observed
(mm)
Most recent
lower
Average for
May
Aldervale 19.2 14.3 in 1912* 87.4
Redlands 5.6 3.6 in 1948 60.5
Bencubbin 1.5 0.0 in 1948* 36.2
Nabawa 0.4 0.0 in 1948* 61.7
Northcliffe 65.7 58.5 in 1949 170.7
Pemberton 58.5 36.2 in 1949 149.4
Yuna 0.4 0.0 in 1948* 48.2
Ballidu 3.0 0.5 in 1948* 43.5
Collie 22.5 16.1 in 1949* 123.5
Coorow 2.3 0.0 in 1949* 49.0
Manjimup 33.4 26.3 in 1949* 128.0
Mullewa 0.3 0.0 in 1948* 45.9
Nannup 35.6 19.5 in 1949* 123.1
Bowgada 0.2 0.0 in 1949* 46.9
Newbicup 21.4 12.6 in 1948* 80.3
Arthur River 15.0 3.6 in 1948* 59.4
Howatharra 5.0 0.0 in 1949* 68.2
Brookton 6.6 6.3 in 1961 56.2
Walebing 3.6 1.1 in 1948* 59.8
Chamingup 16.8 15.9 in 1961* 69.0
Jarrahdale 36.2 35.2 in 1959* 152.5
Dongara 4.0 1.8 in 1959* 68.4
Berkshire Valley 5.0 4.1 in 1964 56.4
Beverley 6.4 3.8 in 1964 52.9
Burracoppin 2.6 0.0 in 1964 41.1
Chidlow 15.0 11.7 in 1964 107.0
Highfields 1.6 1.5 in 1964 46.4
Merredin 5.6 1.8 in 1964 40.0
Northampton 3.4 3.3 in 1964 67.6
Pearce RAAF 18.0 4.2 in 1964 82.9
South Holmwood 2.2 1.8 in 1964 49.5
Wattening 6.8 2.0 in 1964 56.3
Yandanooka 1.8 1.0 in 1964 55.8
Dandaragan West 15.1 7.8 in 1964* 77.6
Kondut 3.4 3.3 in 1964* 45.4
Koorda 5.2 0.0 in 1964* 36.0
Mundaring 30.0 20.1 in 1964* 134.1
Nungarin 3.4 2.7 in 1966 37.5
Trayning 6.1 4.5 in 1966 38.5
Watheroo 4.2 3.0 in 1964* 55.3
Bakers Hill 8.5 0.0 in 1964* 69.1
New Norcia 6.8 2.8 in 1964* 66.9
Mukinbudin 2.1 1.5 in 1964* 33.6
Bolgart 7.6 1.0 in 1964* 58.5
Mindalla 2.2 1.8 in 1964* 44.9
Wubin 3.0 1.3 in 1964* 41.8
Karragullen North 28.4 16.7 in 1964* 126.9
Paynes Find 0.4 0.0 in 1966* 35.6
Jaroma 9.0 6.0 in 1983 46.1
Nangeenan 4.0 3.7 in 1983 37.6
Tamala 1.6 0.0 in 1983 48.3
Bullfinch 2.0 =2.0 in 1983* 33.9
Bodallin South 5.4 5.0 in 1983* 40.1
Denham 0.2 0.0 in 1987* 36.2
Muresk Institute 8.6 3.2 in 1964* 58.8
Nanyanine 6.2 4.9 in 1992 39.2
Ygnattering 8.4 4.9 in 1992 42.1
Barrett Meadows 40.6 35.4 in 1996 121.0
Denmark 45.2 45.0 in 1996 127.8
Mount Magnet Aero 0.2 0.0 in 1996 16.1
Cadoux 3.9 3.8 in 1996* 43.8

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




Record highest May temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Karratha Aero 38.3 on the 6th 37.6 on the 1st in 2013 26 30.0



Record highest May mean daily maximum temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Broome Airport 34.6 34.3 in 2005 79 31.6
Carnarvon Airport 29.1 29.0 in 2012 71 26.3
Mardie 34.5 34.3 in 1994 62 31.5
Onslow Airport 32.6 32.0 in 2012 53 29.3
Learmonth Airport 30.8 30.7 in 2012 44 28.5
Derby Aero 35.8 34.9 in 2005 34 32.9



Record highest May daily minimum temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Kununurra Aero 27.0 on the 4th 26.8 on the 3rd in 1994 34 18.7
Fitzroy Crossing Aero 27.5 on the 5th 26.8 on the 4th in 2016 22 16.0



Record lowest May temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Troughton Island 17.2 on the 12th 19.6 on the 7th in 1970 40 25.4
Paynes Find 0.1 on the 19th 0.2 on the 25th in 1993 39 9.5
Denham 8.5 on the 18th 9.4 on the 30th in 1993 31 16.4
Laverton Aero 0.3 on the 19th 1.1 on the 27th in 2000 28 10.5
Swanbourne 4.8 on the 18th 5.0 on the 31st in 2013 26 12.6
Gingin Aero -2.2 on the 18th -1.2 on the 15th in 2010 24 9.1
Dalwallinu 1.0 on the 19th 2.2 on the 15th in 2010 23 9.9
Morawa Airport 0.0 on the 18th 2.4 on the 22nd in 2007 23 10.4
Southern Cross Airfield -3.4 on the 19th = -3.4 on the 22nd in 2007 23 7.4



Record lowest May mean daily minimum temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Balladonia 6.0 = 6.0 in 2018 93 8.0
Salmon Gums Res.Stn. 4.3 4.5 in 1968 78 7.2
Bencubbin 5.9 = 5.9 in 1968 66 9.2
Pearce RAAF 7.5 7.9 in 1968 58 10.7
Beverley 4.6 5.7 in 1979 49 7.9
Pingelly 6.8 7.0 in 2015 47 8.7
Hyden 4.2 5.1 in 1979 46 7.6
Wagin 5.6 6.1 in 2018 44 8.0
Jarrahwood 3.6 4.1 in 2006 37 6.8
Esperance Aero 9.1 9.4 in 2015 27 10.5
Bickley 8.4 8.6 in 2006 25 10.2
Forrest 6.2 6.6 in 2006 25 8.8
Jacup 6.4 6.6 in 2015 25 8.4
Perth Metro 8.7 8.8 in 2000 25 10.5
Bunbury 6.7 6.9 in 2006 23 9.3
Gingin Aero 5.5 6.0 in 2010 23 9.1
Rocky Gully 7.4 = 7.4 in 2015 23 9.2
Cunderdin Airfield 4.5 5.3 in 2000 22 8.4
Bridgetown 4.3 4.5 in 2006 21 6.8
Lake Grace 5.8 7.0 in 2000 21 8.8
Newdegate Research Station 3.8 4.5 in 2009 21 7.2
Katanning 6.5 6.8 in 2015 20 8.7
Wandering 3.2 3.8 in 2015 20 6.3

Lowest May mean daily minimum temperature for at least 20 years

Observed
(°C)
Most recent
lower
Average for
May
Perth Airport 8.0 6.9 in 1968 10.4
Brookton 5.1 4.2 in 1968* 7.7
Dwellingup 6.0 4.7 in 1968* 7.7
Northam 5.2 4.8 in 1968* 8.4
Narrogin 5.2 4.0 in 1968* 7.8
Narembeen 4.6 4.2 in 1968* 8.2
Ravensthorpe 8.0 7.6 in 1979 9.6
Esperance 10.0 9.5 in 1985 11.1
York 3.3 3.2 in 1996 6.9

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




Record highest May mean temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Curtin Aero 28.0 = 28.0 in 1992 27 26.1



Record lowest May mean temperature

New record
(°C)
Old
record
Years of
record
Average for
May
Wagin 12.3 12.4 in 2015 44 13.7
Gingin Aero 14.1 14.2 in 2016 23 15.9
Cunderdin Airfield 13.2 = 13.2 in 2000 22 15.1
Lake Grace 12.8 13.0 in 2015 21 14.4
Newdegate Research Station 11.7 12.3 in 2015 21 13.6

Lowest May mean temperature for at least 20 years

Observed
(°C)
Most recent
lower
Average for
May
Narembeen 12.6 11.3 in 1968* 14.6
Beverley 13.3 =13.3 in 1987* 14.7
Corrigin 12.4 =12.4 in 1987* 13.6
York 12.8 12.7 in 1996 14.4
Albany 14.6 13.6 in 1960* 14.7

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




Summary statistics for May 2019

Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2019
Diff
from
average
Highest for
May
2019
Mean for
May
2019
Diff
from
average
Lowest for
May
2019
Total for
May
2019
Average
for
May
Rank of
May
2019
Fraction of
May
average
North Kimberley (district 01)
Doongan 32.4 +1.1 35.5 19th 15.2 +0.4 7.6 30th 2.4 13.6 average 18%
Kalumburu 34.2 +0.6 37.2 17th 16.9 -0.1 10.7 30th 14.4 17.8 high 81%
Troughton Island 31.4 +0.2 33.1 8th 25.4 0.0 17.2 12th 9.8 39.3 average 25%
Truscott 32.4 +0.2 35.2 17th 21.6 0.0 15.6 12th 8.4 23.5 average 36%
Wyndham Aero 34.7 +0.5 38.1 2nd 20.3 +1.1 15.9 30th 33.8 12.4 high 273%
East Kimberley (district 02)
Argyle Aerodrome 33.4 +1.3 36.8 18th 20.7 +1.6 14.6 30th 13.0 8.3 high 157%
Halls Creek Airport 31.2   35.8 18th 16.8   9.4 7th 3.4


Kununurra Aero 34.0 +1.0 37.5 2nd 19.2 +0.5 13.1 8th 3.0 6.9 high 43%
Warmun 31.0 -1.3 35.3 18th 17.7 +0.5 10.6 30th 14.0 10.2 high 137%
West Kimberley (district 03)
Broome Airport 34.6 +3.0 38.2 22nd 17.5 -0.8 13.2 12th 0 26.5 lowest 0%
Curtin Aero 35.3 +2.1 38.1 4th 20.3 +1.3 15.9 12th 0 13.1 lowest 0%
Cygnet Bay 32.1 +1.1 34.9 5th 18.7 -0.4 14.2 13th 0 40.6 lowest 0%
Derby Aero 35.8 +2.9 39.0 3rd 18.4 -0.4 11.7 13th 0 18.9 lowest 0%
Fitzroy Crossing Aero 35.0 +1.7 38.6 18th 17.7 +1.7 12.1 12th 0 14.0 lowest 0%
De Grey (district 04)
Bedout Island 29.4 +0.6 32.6 4th 23.5 -0.2 21.3 13th



Karratha Aero 31.7 +1.7 38.3 6th 18.1 -0.2 13.0 13th 0 27.1 lowest 0%
Mandora 35.2 +3.1 39.7 5th 17.2 +0.3 12.4 14th 0 24.5 lowest 0%
Marble Bar 32.3 +1.2 36.2 6th 15.9 -1.2 11.3 12th 0 11.8 v low 0%
Port Hedland Airport 32.9 +2.2 37.2 22nd 16.4 -0.9 11.5 13th 0 26.7 lowest 0%
Roebourne Aero 32.7 +0.9 37.6 6th 15.4 -1.4 10.4 13th



Fortescue (district 05)
Barrow Island Airport 28.4 +0.9 32.6 5th 20.9 -0.4 16.8 13th 0.2 49.3 low 0%
Karijini North 30.9   35.2 6th 16.2   11.1 13th 0


Learmonth Airport 30.8 +2.3 35.5 24th 14.3 -1.8 10.3 19th 0 41.6 lowest 0%
Mardie 34.5 +3.0 38.3 6th 17.2 +0.3 12.9 13th 0 36.5 lowest 0%
Onslow Airport 32.6 +3.3 37.7 23rd 17.5 +0.1 13.8 15th 0 47.7 lowest 0%
Thevenard Island 30.1 +1.4 34.3 7th 21.3 +0.2 15.7 12th 0.4 36.6 low 1%
Wittenoom 31.4 +3.5 35.9 6th 16.8 +0.6 10.6 12th 0 26.7 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 29.1 +2.8 34.9 29th 13.5 -1.3 6.4 19th 0 32.9 lowest 0%
Denham 26.6 +0.9 32.0 29th 15.5 -0.9 8.5 18th 0.2 36.2 v low 1%
Murchison 26.8 +0.7 31.1 22nd 10.6 -0.6 1.0 19th 0 16.8 lowest 0%
Shark Bay Airport 29.0 +1.7 32.4 29th 13.3 -1.2 4.5 18th 0.2 22.8 v low 1%
East Gascoyne (district 07)
Newman Aero 29.2 +2.1 34.1 6th 11.1 -0.9 5.8 12th 0 18.6 lowest 0%
Paraburdoo Aero 31.5 +2.5 34.6 23rd 14.5 -0.2 9.9 13th 0 17.7 lowest 0%
Murchison (district 07A)
Meekatharra Airport 25.9 +2.1 32.3 5th 12.3 +0.2 4.8 18th 0 21.8 lowest 0%
Mount Magnet Aero 24.5 +0.6 32.2 5th 10.4 -1.2 3.8 18th 0.2 16.1 v low 1%
Paynes Find 24.0 +0.9 31.9 5th 7.8 -1.7 0.1 19th 0.4 35.6 v low 1%
North Coast (district 08)
Dalwallinu 22.5 +0.4 28.4 15th 7.0 -2.9 1.0 19th 4.0 34.1 lowest 12%
Geraldton Airport 26.5   31.8 15th 10.8   1.1 18th 1.6


Kalbarri 28.0 +2.0 32.5 29th 13.2 0.0 4.1 18th 1.2 53.2 lowest 2%
Morawa Airport 24.9 +0.9 30.3 15th 8.1 -2.3 0.0 18th 0.6 35.1 lowest 2%
Mullewa 25.9 +2.1 30.5 3rd 10.8 -0.4 3.1 18th 0.3 45.9 v low 1%
North Island 24.2 -0.2 27.1 15th 18.2 -0.2 13.5 5th 1.2 40.6 v low 3%
Wongan Hills 22.1 +0.5 28.5 15th 7.8 -2.1 2.0 18th 13.9 51.3 v low 27%
Central Coast (district 09)
Badgingarra Research Stn 23.2 +0.7 29.9 15th 9.7 -0.9 3.5 18th 8.2 68.0 v low 12%
Bickley 19.1 -0.2 25.9 15th 8.4 -1.8 3.5 19th 28.0 129.8 lowest 22%
Garden Island HSF 21.0 -0.4 26.0 3rd 12.1 -1.9 7.8 18th 22.0 72.5 v low 30%
Gingin Aero 22.8 0.0 31.0 15th 5.5 -3.6 -2.2 18th 12.4 72.6 lowest 17%
Jandakot Aero 22.0 0.0 27.2 15th 7.5 -1.9 -0.1 19th 24.4 104.8 lowest 23%
Jurien Bay 24.2 +0.9 28.5 29th 10.1 -1.7 2.9 18th 14.3 75.0 lowest 19%
Lancelin 23.3 +0.6 29.0 3rd 10.4 -2.0 4.0 17th 15.3 78.9 lowest 19%
Millendon (Swan Valley) 22.8   30.2 15th 7.7   0.5 18th 16.0


Pearce RAAF 23.1 +1.1 31.0 15th 7.5 -3.2 -0.3 18th 18.0 82.9 v low 22%
Perth Airport 22.5 +0.7 29.7 15th 8.0 -2.4 1.5 18th 12.2 97.4 lowest 13%
Perth Metro 22.2 -0.1 28.0 14th 8.7 -1.8 1.6 19th 17.8 86.8 lowest 21%
Rottnest Island 20.8 -0.3 26.1 3rd 14.2 -1.1 9.8 18th 12.4 71.7 lowest 17%
Swanbourne 21.8 -0.4 28.0 3rd 11.1 -1.5 4.8 18th 15.2 87.7 lowest 17%
South Coast (district 09A)
Albany 18.7 +0.1 25.0 4th 10.8 0.0 5.2 10th 31.0 114.8 lowest 27%
Albany Airport 19.1   26.0 15th 8.2   2.2 10th 39.0


Bridgetown 19.2 -0.4 23.6 15th 4.3 -2.5 -1.3 2nd 25.2 95.9 lowest 26%
Bunbury 20.6 -0.4 24.5 3rd 6.7 -2.6 1.5 2nd 34.8 96.2 v low 36%
Busselton Aero 20.1 -0.4 23.1 3rd 6.8 -2.3 1.5 2nd 24.8 100.3 lowest 25%
Cape Leeuwin 19.2 0.0 23.6 3rd 13.2 -0.5 8.8 3rd 34.6 136.8 lowest 25%
Cape Naturaliste 20.2 +0.9 22.9 31st 11.7 -0.9 7.1 2nd 23.2 113.6 lowest 20%
Collie East 19.9 -0.2 24.2 10th 3.2 -2.9 -2.2 3rd 24.4 90.1 v low 27%
Donnybrook 20.5 +0.5 24.5 11th     0.0 17th 50.4 133.7 v low 38%
Dwellingup 19.4 +0.9 24.3 15th 6.0 -1.7 -0.7 19th 50.0 156.5 v low 32%
Esperance 20.0 -0.5 30.8 5th 10.0 -1.1 5.3 3rd 53.6 71.1 average 75%
Esperance Aero 19.9 -0.3 30.0 5th 9.1 -1.4 4.5 10th 51.6 65.0 average 79%
Hopetoun North 20.2 -0.9 29.5 15th 9.7 -0.6 5.1 3rd 30.6 44.7 low 68%
Jarrahwood 20.3 +0.3 24.0 3rd 3.6 -3.2 -2.5 2nd 39.6 124.3 lowest 32%
Mandurah 20.5 -0.7 24.2 3rd 11.7 -1.8 6.5 18th 22.6 86.6 v low 26%
Manjimup 18.5 +0.8 23.1 31st 7.8 -1.1 3.8 19th 33.4 128.0 v low 26%
North Walpole 18.7 -0.4 23.6 4th 10.2 -1.1 4.9 19th 75.8 119.8 low 63%
Rocky Gully 18.0 -0.6 23.0 15th 7.4 -1.8 2.4 9th 53.0 73.4 average 72%
Shannon 17.3 -0.8 21.3 11th 7.4 -1.4 3.0 10th 56.4 117.9 v low 48%
Witchcliffe 19.2 -0.6 22.2 4th 8.0 -1.8 3.0 10th 57.6 132.4 v low 44%
North Central (district 10)
Bencubbin 21.2 +0.3 28.3 5th 5.9 -3.3 -0.5 19th 1.5 36.2 v low 4%
Cunderdin Airfield 21.9 0.0 29.5 15th 4.5 -3.9 -0.8 19th 7.6 30.1 lowest 25%
Merredin 21.2 +0.5 28.2 5th 6.6 -2.3 -0.5 19th 5.6 40.0 v low 14%
Northam 22.3 +1.0 30.0 15th 5.2 -3.2 -1.0 19th 8.7 54.5 v low 16%
York 22.3 +0.4 30.0 15th 3.3 -3.6 -2.2 19th 7.8 42.8 v low 18%
South Central (district 10A)
Beverley 22.0 +0.6 28.8 15th 4.6 -3.3 -1.6 19th 6.4 52.9 v low 12%
Brookton 21.0 +0.5 27.5 15th 5.1 -2.6 -0.5 18th 6.6 56.2 v low 12%
Corrigin 20.2 +0.5 27.7 15th 4.6 -2.9 -1.1 19th 8.8 46.1 v low 19%
Hyden 21.5 +0.7 28.5 5th 4.2 -3.4 -1.7 19th 10.4 38.4 low 27%
Jacup 19.1 -0.6 28.0 15th 6.4 -2.0 2.8 3rd 26.6 31.5 average 84%
Katanning 18.6 -0.6 26.8 15th 6.5 -2.2 2.2 19th 17.8 46.5 low 38%
Lake Grace 19.7 -0.3 27.8 15th 5.8 -3.0 1.7 19th 13.0 29.1 low 45%
Narembeen 21.1 +0.1 27.9 5th 4.6 -3.6 0.0 19th 10.9 38.4 low 28%
Narrogin 19.5 +0.9 26.6 15th 5.2 -2.6 -0.3 2nd 15.0 62.0 v low 24%
Newdegate Research Station 19.5 -0.5 27.2 15th 3.8 -3.4 -1.0 10th 12.8 41.7 low 31%
Pingelly 20.4 +0.7 27.1 15th 6.8 -1.9 1.2 19th 11.9 57.0 v low 21%
Ravensthorpe 20.1 0.0 28.0 5th 8.0 -1.6 2.5 10th 34.4 43.7 average 79%
Wagin 19.3 -0.2 26.4 15th 5.6 -2.4 1.0 27th 12.4 53.7 v low 23%
Wandering 20.3 +0.3 27.7 15th 3.2 -3.1 -1.5 2nd 17.8 54.4 low 33%
Eucla (district 11)
Balladonia 20.7 -0.3 32.1 5th 6.0 -2.0 1.5 31st 26.6 26.1 average 102%
Eucla 21.4 +0.3 33.4 23rd 9.2 -1.4 3.7 20th 28.6 31.0 average 92%
Eyre 21.7 +0.3 33.0 5th 7.0 -2.0 -2.1 11th 58.5 38.5 high 152%
Forrest 22.3 0.0 33.9 23rd 6.2 -2.6 1.2 20th 0.6 17.1 v low 4%
Red Rocks Point 21.4 +0.1 32.8 6th 10.0 -1.4 5.4 20th 4.6 28.3 v low 16%
South East (district 12)
Bulga Downs 23.9 0.0 32.1 5th 7.5 -1.7 -0.4 19th



Kalgoorlie-Boulder Airport 20.9 +0.2 31.4 5th 6.5 -2.2 0.5 19th 9.8 24.9 average 39%
Laverton Aero 23.0 +0.8 31.5 5th 8.8 -1.7 0.3 19th 0 14.0 lowest 0%
Leinster Aero 23.6 +0.5 31.8 5th 8.8 -1.7 2.0 18th 0.6 14.9 low 4%
Leonora Aero 23.4 +0.2 32.4 5th 7.5 -2.4 -0.3 19th 0.2 9.6 low 2%
Munglinup West 20.0 -0.6 29.9 5th 7.9 -1.7 4.1 10th 34.8 38.5 average 90%
Norseman Aero 20.7 -0.3 31.0 5th 3.7 -3.4 -1.4 3rd 11.8 18.9 average 62%
Salmon Gums Res.Stn. 20.2 +0.3 30.2 5th 4.3 -2.9 -1.6 3rd 10.8 33.8 low 32%
Southern Cross Airfield 21.5 +0.2 31.2 5th 4.2 -3.2 -3.4 19th 2.2 26.8 lowest 8%
North East (district 13)
Carnegie 26.3 +1.0 33.0 23rd     8.2 12th 0 16.0 lowest 0%
Giles Meteorological Office 25.5 +1.7 30.8 21st 9.5 -1.8 2.8 12th 0 20.5 lowest 0%
Telfer Aero 31.1 +2.0 35.3 5th 15.3 -0.1 8.8 12th 0 18.7 lowest 0%
Warburton Airfield 25.2 +0.8 32.1 22nd 8.4 -2.1 0.3 19th 0 15.4 lowest 0%
Wiluna 25.3 +1.5 32.0 22nd 7.8 -2.2 2.0 18th 1.0 25.1 low 4%
Wiluna Aero 25.3   32.1 22nd 8.5   2.1 18th 0.4


Offshore Islands (district 200)
Adele Island 30.6   32.2 2nd 26.5   23.7 13th



Browse Island 30.0   31.7 3rd 27.2   24.6 13th



Rowley Shoals 28.7   30.2 3rd 26.6   24.4 13th



Varanus Island 28.8 +0.8 31.4 7th 23.9 +0.4 21.5 13th 0 29.7 v low 0%

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 3 pm on Saturday 1 June 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.

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