Wednesday, 1 May 2019 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in April 2019: above average temperatures

Rainfall in April 2019 was mixed, with above average rainfall in the far western Pilbara and inland Gascoyne, and near average to below average rainfall for the reminder of Western Australia. Mean maximum temperatures were mostly above average except for the State's southwest. Mean minimum temperatures were mostly above average with below average mean minima in the far southwest corner. Both mean maximum and minimum temperatures were above average for the State as a whole.

Above average rainfall in the northwest

  • Monthly rainfall was mixed: above average rainfall in the far western Pilbara and inland Gascoyne, near average or below average rainfall for the reminder
  • Rainfall was 14 % below April average for WA as a whole, though it was wettest than April 2018
  • It was a dry 'wet season' (October 2018-April 2019) for much of the Kimberley and Pilbara districts; three tropical cyclones formed in the WA region late in the season with tropical cyclones Savannah and Veronica developed in March, followed by Wallace in April,  and only Veronica tracked close to the coast and  brought significant falls along the Pilbara coastal areas
  • A monsoon trough with embedded tropical cyclone Wallace and a tropical low produced moderate rainfall to the Kimberley and Pilbara coasts in the first half of April; Kito Station had its wettest April day on the 13th
  • A cloudband followed by a cold front produced moderate rainfall and localised heavy falls over inland western and southern WA between the 12th and 15th; a number of sites in the Gascoyne and southern Pilbara broke their April daily rainfall records and several sites had their wettest April for more than 20 years as a result
  • The first strong cold front of the season produced moderate rainfall and small hail to the State's southwest on the 19th and 20th; Bluff Knoll in the Stirling Ranges reported snow on the 19th, which was one of its earliest dates for snow fall (the earliest sighted date was 20 April 1970)

Above average daytime temperatures

  • The mean maximum temperature for WA was 1.58 °C above average, which was the thirteenth-highest on record for April
  • The mean minimum temperature for WA was 1.01 °C above average, which was the fifteenth-highest on record for April
  • It was a very hot 'wet season', and maximum and minimum temperatures were very much above average across most of the Kimberley and Pilbara districts
  • A number of late season heatwave events occurred early in the month in the northwestern and southern WA; several sites in the Eucla, Gascoyne, the South West Land Division (SWLD) and Goldfields had their highest April temperature on record , and it was the first occurrence with temperature over 40 °C in April for Eyre (41.5 °C on the 4th) and Kalgoorlie-Boulder Airport (40.1 °C on the 11th)
  • A strong cold front followed by an airmass from deep south led to wet and cold conditions in the southern WA between the 19th and 21st, with many new records set for coldest April day and coldest April night
  • A daily maximum temperature of 9.4 °C on the 19th at Rocky Gully (South Coastal district) was also the State's new record for lowest April maximum temperature; previous record was 10.0 °C (at Manjimup on 20 April 1970 and at Mount Barker on 12 April 1955)
  • Record warm nights were on the 1st in the SWLD with daily minima in the low 20s, also on the 10th and 11th in inland Gascoyne and Goldfields with daily minima in the mid-to-high 20s
  • A number of sites in the Kimberley experienced very warm nights with daily minims in the high 20s between the 5th and 10th, which was their new April record; a minimum of 30.0 °C at Halls Creek Airport's on the 9th was Halls Creek town's highest April minimum temperature on record (previous record was 28.7 °C on 14 April 1961 at Halls Creek MO), and it is also the national highest minimum of the month

Tropical cyclone Wallace

  • Tropical cyclone Wallace, the third cyclone of the season in the northwest WA region, developed off the north Kimberley coast on the 6th. Wallace maintained a steady southwesterly track off the northwest coast and briefly intensified to category 3 system before downgrading to a low on the 10th

Severe wind gusts in the south

  • A thunderstorm produced a wind gust of 94 km/h at Norseman Aero on the 11th
  • A strong cold front and an airmass from deep south produced severe coastal wind gusts and small hail in the SWLD between the 19th and 21st. A house roof was blown off at Alkimos (a northern suburb of Perth), and small hail was reported in Perth and Albany. Snow fell on Bluff Knoll on the 19th. The State's Fire and Emergency Services responded more than 60 calls for assistance in the western and southern SWLD.

Further information

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Extremes Maps Records Summaries Important notes the top

Extremes in April 2019
Hottest day 43.3 °C at Mardie on the 7th
Warmest days on average 38.5 °C at Fitzroy Crossing Aero
Coolest days on average 20.7 °C at Shannon
Coldest day 9.2 °C at Rocky Gully on the 19th
Coldest night 0.4 °C at Jarrahwood on the 21st
Coolest nights on average 7.4 °C at Jarrahwood
Warmest nights on average 27.8 °C at Browse Island
Warmest night 30.0 °C at Halls Creek Airport on the 9th
Warmest on average overall 30.9 °C at Fitzroy Crossing Aero
Coolest on average overall 15.2 °C at Shannon
Wettest overall 130.6 mm at Troughton Island
Wettest day 105.0 mm at Hill Springs on the 12th
Strongest wind gust 94 km/h at Norseman Aero on the 11th

Extremes Maps Records Summaries Important notes the top

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 April daily rainfall
New record
(mm)		 Old
record		 Years of
record
Mount Narryer 74.0 on the 14th 73.7 on the 10th in 1923 97
Hill Springs 105.0 on the 12th 97.0 on the 25th in 2007 65
Mininer 56.0 on the 15th 45.0 on the 24th in 1989 56
Kilto Station 55.5 on the 13th 44.0 on the 7th in 1999 35


Record highest April total rainfall
New record
(mm)		 Old
record		 Years of
record		 Average for
April
Kilto Station 82.8 76.0 in 2000 36 23.4

Highest April total rainfall for at least 20 years
Observed
(mm)		 Most recent
higher		 Average for
April
Mount Narryer 110.1 115.1 in 1966* 15.5
Mininer 56.4 114.2 in 1992 18.1
Yarrabubba 52.6 112.8 in 1992* 15.9
Kalgoorlie-Boulder Airport 36.2 55.6 in 1998 20.5
Melangata 63.6 115.0 in 1992* 18.2
Woolgorong 37.6 72.4 in 1997* 17.6
Gindalbie 38.5 43.0 in 1996* 20.2

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



Record highest April temperature
New record
(°C)		 Old
record		 Years of
record		 Average for
April
Kalgoorlie-Boulder Airport 40.1 on the 11th 38.9 on the 4th in 1945 79 25.3
Paynes Find 39.3 on the 9th 38.2 on the 10th in 2013 38 28.5
Eyre 41.5 on the 4th 39.1 on the 12th in 2005 31 24.2
Murchison 41.0 on the 9th 40.0 on the 3rd in 2016 30 31.0
Laverton Aero 39.3 on the 11th 38.1 on the 7th in 2018 28 26.8
Jacup 36.7 on the 10th 35.9 on the 8th in 2013 25 23.0
Mount Magnet Aero 39.2 on the 9th 38.4 on the 4th in 2016 24 28.9
Morawa Airport 40.2 on the 9th 38.8 on the 11th in 2013 23 28.9
Newdegate Research Station 36.7 on the 10th 35.7 on the 9th in 2013 23 24.2
Southern Cross Airfield 39.0 on the 10th 37.0 on the 11th in 2013 23 26.3
Dalwallinu 38.0 on the 9th 37.5 on the 11th in 2013 22 27.1
Hopetoun North 38.0 on the 10th 37.3 on the 6th in 2011 22 23.2
Lake Grace 37.0 on the 10th 36.3 on the 9th in 2013 22 24.3


Record lowest April daily maximum temperature
New record
(°C)		 Old
record		 Years of
record		 Average for
April
Wagin 12.8 on the 19th = 12.8 on the 15th in 1976 46 23.7
Rottnest Island 16.3 on the 20th 16.6 on the 26th in 2006 30 23.7
Swanbourne 16.6 on the 19th 16.7 on the 1st in 2005 26 25.4
Rocky Gully 9.2 on the 19th 12.2 on the 19th in 2008 24 21.9
Newdegate Research Station 13.5 on the 19th 13.9 on the 21st in 2008 23 24.2
Bridgetown 12.9 on the 19th 14.5 on the 1st in 2005 22 23.4
Busselton Aero 15.5 on the 19th 16.0 on the 1st in 2005 22 24.0
Lake Grace 13.5 on the 19th 13.7 on the 19th in 2008 22 24.3
Katanning 11.5 on the 19th 13.0 on the 19th in 2008 21 23.3
Shannon 10.9 on the 19th 13.0 on the 1st in 2005 21 21.5
Wandering 13.7 on the 19th 15.3 on the 1st in 2005 21 24.5


Record highest April daily minimum temperature
New record
(°C)		 Old
record		 Years of
record		 Average for
April
Meekatharra Airport 27.9 on the 11th 25.1 on the 4th in 2016 70 17.1
Beverley 22.2 on the 1st 21.5 on the 1st in 1989 50 11.3
Pingelly 21.2 on the 1st 20.8 on the 4th in 1971 49 11.8
Wagin 20.7 on the 1st 20.5 on the 15th in 1999 46 10.8
Paynes Find 27.4 on the 10th 24.4 on the 5th in 2007 38 14.2
Kununurra Aero 27.6 on the 5th 27.5 on the 3rd in 1999 34 21.9
Doongan 25.0 on the 9th = 25.0 on the 13th in 1998 31 19.0
Laverton Aero 24.3 on the 11th 23.5 on the 14th in 2007 28 14.9
Gosnells City 22.5 on the 1st = 22.5 on the 11th in 2001 26 14.8
Argyle Aerodrome 29.3 on the 5th 28.8 on the 7th in 2016 25 22.9
Mount Magnet Aero 25.9 on the 10th 25.4 on the 1st in 2010 24 16.3
Newdegate Research Station 18.1 on the 1st 18.0 on the 13th in 2013 23 10.2
Fitzroy Crossing Aero 29.9 on the 6th 27.6 on the 9th in 2010 22 20.7


Record lowest April temperature
New record
(°C)		 Old
record		 Years of
record		 Average for
April
Ongerup 1.9 on the 23rd 2.5 on the 13th in 1967 51 11.2
Learmonth Airport 11.2 on the 22nd 12.9 on the 21st in 2008 45 20.4
Rottnest Island 10.3 on the 20th 11.6 on the 12th in 2003 30 17.3
Esperance Aero 4.6 on the 20th 5.4 on the 20th in 2008 28 12.7
Bickley 4.4 on the 20th 5.0 on the 29th in 2000 26 12.7
Swanbourne 7.5 on the 20th 7.9 on the 27th in 2006 26 15.3
Bunbury 2.4 on the 20th = 2.4 on the 27th in 2006 24 11.8
Rocky Gully 2.7 on the 20th 2.8 on the 24th in 2002 24 10.9
Thevenard Island 16.8 on the 24th 18.4 on the 29th in 2012 24 24.4
Newdegate Research Station 1.0 on the 21st 1.2 on the 8th in 2017 23 10.2
York 2.0 on the 20th 2.2 on the 25th in 2010 23 10.9
Dalwallinu 3.4 on the 21st 5.0 on the 28th in 2006 22 13.2
Katanning 3.2 on the 20th 4.0 on the 18th in 2005 21 11.1
Norseman Aero 0.8 on the 20th 1.0 on the 8th in 2001 20 11.0


Record highest April mean daily minimum temperature
New record
(°C)		 Old
record		 Years of
record		 Average for
April
Fitzroy Crossing Aero 23.2 23.1 in 2010 21 20.7


Extremes Maps Records Summaries Important notes the top

Summary statistics for April 2019
Maximum temperatures
(°C)		 Minimum temperatures
(°C)		 Rainfall
(millimetres)
Mean for
April
2019		 Diff
from
average		 Highest for
April
2019		 Mean for
April
2019		 Diff
from
average		 Lowest for
April
2019		 Total for
April
2019		 Average
for
April		 Rank of
April
2019		 Fraction of
April
average
North Kimberley (district 01)
Doongan 33.6 +0.3 35.8 18th 20.5 +1.5 13.8 3rd 13.7 45.6 average 30%
Kalumburu 35.2 +0.3 37.5 17th 21.5 +0.4 17.2 27th 72.6 37.8 high 192%
Troughton Island 32.3 -0.5 35.0 3rd 26.8 -0.1 23.1 29th 130.6 32.3 v high 404%
Truscott 33.0 -0.5 36.4 1st 24.3 +0.1 21.3 29th 86.4 75.3 average 115%
Wyndham Aero 37.3 +0.5 39.3 22nd 23.8 +0.4 19.5 3rd 20.8 26.2 average 79%
East Kimberley (district 02)
Argyle Aerodrome 36.4 +1.3 38.7 17th 24.6 +1.7 20.6 3rd 1.2 24.5 low 5%
Halls Creek Airport 35.6   38.3 7th 20.6   14.8 2nd 7.0
Kununurra Aero 36.5 +1.1 38.8 5th 21.7 -0.2 16.4 3rd 12.8 30.3 average 42%
Warmun 34.4 -0.8 35.8 16th 20.8 +0.2 15.4 3rd 26.0 25.1 average 104%
West Kimberley (district 03)
Bidyadanga 36.4 +0.7 40.5 4th 24.5 +2.4 19.5 24th 5.2 24.9 average 21%
Broome Airport 35.0 +0.7 39.2 1st 23.8 +1.1 18.5 25th 38.2 25.7 high 149%
Curtin Aero 36.6 +0.1 39.5 5th 23.0 +0.7 18.2 4th 48.4 39.5 high 123%
Cygnet Bay 33.6 0.0 35.2 9th 23.1 +0.7 17.4 27th 38.2 40.6 average 94%
Derby Aero 36.7 +1.0 39.8 5th 23.7 +0.9 16.8 3rd 15.6 24.1 average 65%
Fitzroy Crossing Aero 38.5 +1.7 41.1 18th 23.2 +2.5 16.9 2nd 2.2 26.9 low 8%
De Grey (district 04)
Bedout Island 32.5 -0.1 34.8 7th 26.6   23.9 13th
Karratha Aero 35.0 +0.6 40.5 7th 24.1 +1.3 19.0 22nd 6.4 17.1 average 37%
Mandora 37.0 +0.8 41.4 5th 22.0 +1.2 14.8 5th 27.0 19.1 high 141%
Marble Bar 36.0 -0.2 39.3 7th 22.4 +0.4 17.4 22nd 0.6 20.6 low 3%
Port Hedland Airport 34.9 -0.4 39.0 7th 22.7 +1.2 17.3 26th 7.8 21.6 average 36%
Roebourne Aero 35.3 -0.9 40.2 7th 22.8 +1.0 15.8 22nd
Fortescue (district 05)
Barrow Island Airport 31.7 +0.4 36.7 7th 24.6 0.0 21.0 22nd 21.0 33.1 average 63%
Karijini North 35.0   39.4 7th 22.0   15.7 22nd 3.2
Learmonth Airport 33.6 +0.3 40.4 7th 19.9 -0.5 11.2 22nd 49.6 18.0 v high 276%
Mardie 36.5 +0.6 43.3 7th 23.0 +1.8 18.3 24th 24.4 19.4 high 126%
Onslow Airport 35.2 +1.3 40.2 7th 22.6 +1.2 16.6 22nd 6.6 11.3 average 58%
Thevenard Island 32.6 +0.5 37.8 5th 24.6 +0.2 16.8 24th 2.4 17.6 average 14%
Wittenoom 35.1 +1.9 39.9 7th 22.3 +1.1 16.3 21st 3.0 27.3 average 11%
West Gascoyne (district 06)
Carnarvon Airport 29.8 +0.6 37.3 26th 19.1 -0.1 11.6 22nd 18.2 13.2 high 138%
Denham 28.5 -0.1 36.5 25th 19.0 -0.7 14.0 22nd 1.2 13.6 average 9%
Murchison 31.0 0.0 41.0 9th 16.1 -0.2 7.6 22nd 43.0 21.5 high 200%
Shark Bay Airport 30.9 -0.2 38.3 8th 17.6 -0.8 11.7 22nd 2.4 8.4 average 29%
East Gascoyne (district 07)
Newman Aero 34.3 +2.3 38.1 8th 18.7 +1.2 8.4 22nd 3.8 21.4 average 18%
Paraburdoo Aero 35.1 +1.4 40.8 8th 21.0 +1.2 13.4 22nd 11.0 24.5 average 45%
Murchison (district 07A)
Meekatharra Airport 30.7 +1.4 39.1 9th 17.8 +0.7 9.3 20th 21.2 18.9 average 112%
Mount Magnet Aero 28.6 -0.3 39.2 9th 16.5 +0.2 6.6 21st 39.4 19.0 high 207%
Paynes Find 29.1 +0.6 39.3 9th 14.5 +0.3 5.1 21st 33.6 25.3 high 133%
North Coast (district 08)
Dalwallinu 27.7 +0.6 38.0 9th 12.0 -1.2 3.4 21st 3.4 12.8 average 27%
Geraldton Airport 28.4   36.6 9th 14.3   6.3 21st 3.2
Kalbarri 29.5 0.0 36.2 7th 16.6 +0.3 10.0 21st 2.5 19.0 low 13%
Morawa Airport 29.3 +0.4 40.2 9th 13.9 -0.6 6.6 30th 23.2 18.0 high 129%
Mullewa 29.3 +0.5 40.4 9th 15.4 +0.3 8.6 21st 36.2 21.5 high 168%
North Island 25.8 -0.5 29.0 28th 20.0 -0.4 15.4 29th 1.4 15.6 low 9%
Wongan Hills 27.1 +0.6 36.7 9th 12.6 -0.8 4.0 20th 9.2 22.2 average 41%
Central Coast (district 09)
Badgingarra Research Stn 27.4 +0.2 38.4 9th 13.3 -0.3 6.7 30th 16.6 26.9 average 62%
Bickley 23.0 -0.6 30.7 9th 11.9 -0.8 4.4 20th 62.4 55.4 average 113%
Garden Island HSF 23.4 -0.4 31.1 9th 15.6 -0.5 9.0 20th 24.8 37.3 low 66%
Gingin Aero 26.6 -0.1 35.3 9th 11.0 -1.1 1.9 21st 31.4 27.9 average 113%
Gosnells City     33.5 9th 13.9 -0.9 4.0 21st   42.3    
Jandakot Aero 25.6 -0.2 33.2 9th 12.2 -0.3 3.9 20th 43.0 41.6 average 103%
Jurien Bay 26.8 +0.4 32.6 25th 14.1 +0.1 5.0 22nd 23.0 29.5 average 78%
Karnet 22.9 -0.4 30.2 9th 11.0 -0.8 3.4 20th 47.1 64.9 average 73%
Lancelin 25.5 0.0 34.6 9th 13.6 -0.9 7.3 21st 18.4 30.6 low 60%
Millendon (Swan Valley) 26.4   34.7 9th 12.5   4.1 30th 29.6
Pearce RAAF 27.0 +0.6 34.6 9th 12.7 -0.6 3.6 30th 27.4 34.4 average 80%
Perth Airport 26.0 +0.4 33.9 9th 12.6 -0.4 3.7 20th 34.0 40.0 average 85%
Perth Metro 25.6 -0.3 33.6 9th 13.0 -0.8 5.6 20th 44.2 36.0 high 123%
Rottnest Island 23.1 -0.6 29.0 9th 16.7 -0.6 10.3 20th 16.6 33.2 average 50%
Swanbourne 24.6 -0.8 33.0 9th 14.9 -0.4 7.5 20th 35.2 39.3 average 90%
South Coast (district 09A)
Albany 21.2 +0.3 29.9 1st 12.9 +0.1 5.5 20th 51.4 68.6 average 75%
Bridgetown 22.8 -0.6 28.6 9th 7.9 -1.4 1.5 21st 44.8 48.6 average 92%
Bunbury 23.9 -0.3 31.1 9th 10.2 -1.6 2.4 20th 16.2 36.5 low 44%
Busselton Aero 23.6 -0.4 29.9 9th 10.1 -1.0 3.9 21st 26.8 32.9 average 81%
Cape Leeuwin 20.9 -0.4 26.9 27th 15.3 -0.2 8.6 19th 40.2 58.7 average 68%
Cape Naturaliste 22.6 +0.7 28.1 9th 13.6 -0.3 7.5 20th 26.0 42.9 average 61%
Collie East 23.9 +0.1 30.0 9th 7.6 -1.3 0.7 21st 22.2 41.6 low 53%
Donnybrook 24.6 +0.5 31.0 9th 10.5 +0.1 3.5 20th 29.6 49.4 low 60%
Dwellingup 23.3 +0.8 30.3 9th 10.2 -0.1 2.3 20th 60.6 65.5 average 93%
Esperance 23.6 +0.4 35.5 10th 13.1 -0.2 5.9 20th 25.4 43.5 average 58%
Esperance Aero 24.2 +0.6 34.5 1st 12.2 -0.5 4.6 20th 33.4 38.8 average 86%
Hopetoun North 23.2 0.0 38.0 10th 12.3 -0.3 6.2 20th 18.6 34.9 low 53%
Jarrahwood 24.0 +0.2 30.0 9th 7.4 -1.3 0.4 21st 35.8 48.1 average 74%
Mandurah 23.9 -0.2 29.8 3rd 15.1 -0.7 7.3 20th 38.6 39.1 average 99%
Manjimup 21.9 +0.8 29.4 9th 10.2 -0.6 3.4 20th 48.6 59.2 average 82%
North Walpole 21.2 -0.2 28.3 13th 11.6 -1.2 6.2 21st 76.2 82.6 average 92%
Rocky Gully 21.5 -0.4 30.7 10th 9.9 -1.0 2.7 20th 59.4 51.9 average 114%
Shannon 20.7 -0.8 27.7 9th 9.8 -1.0 3.7 20th 78.6 66.4 average 118%
Witchcliffe 22.0 -0.5 29.1 9th 10.5 -0.7 4.6 6th 45.8 61.9 average 74%
North Central (district 10)
Bencubbin 26.3 +0.5 36.0 9th     8.3 23rd 5.5 22.2 low 25%
Cunderdin Airfield 26.7 +0.1 37.5 10th 11.2 -0.9 3.0 21st 21.6 23.7 average 91%
Merredin 25.9 +0.4 36.6 10th 13.1 +0.2 3.6 20th 22.8 22.8 average 100%
Northam 26.7 +0.6 35.6 10th 11.5 -0.5 2.6 20th 15.4 23.2 average 66%
York 26.5 +0.1 36.0 10th 9.5 -1.4 2.0 20th 15.6 21.4 average 73%
South Central (district 10A)
Beverley 26.4 +0.2 36.2 10th 10.4 -0.9 1.4 20th 10.6 23.2 average 46%
Brookton 25.2 +0.2 35.4 10th 10.1 -1.1 1.6 20th 11.4 25.7 average 44%
Corrigin 25.0 +0.7 36.1 10th 11.1 -0.1 2.4 21st 21.0 23.0 average 91%
Hyden 26.0 +0.3 35.8 10th 10.8 -0.3 0.9 21st 23.9 23.4 average 102%
Jacup 23.3 +0.3 36.7 10th 10.0 -0.8 3.1 20th 20.0 40.0 average 50%
Katanning 23.0 -0.3 33.1 10th 10.2 -0.9 3.2 20th 15.2 29.6 average 51%
Lake Grace 23.9 -0.4 37.0 10th 11.2 -0.7 3.1 21st 17.0 23.9 average 71%
Narembeen 25.7 -0.2 36.0 10th 11.3 -0.7 3.0 21st 23.7 23.0 average 103%
Narrogin 23.9 +0.8 33.5 10th 10.2 -0.3 2.4 21st 23.8 29.2 average 82%
Newdegate Research Station 24.0 -0.2 36.7 10th 9.5 -0.7 1.0 21st 21.2 26.1 average 81%
Pingelly 24.6 +0.5 35.2 10th 11.3 -0.5 3.4 20th 12.4 26.8 average 46%
Ravensthorpe 24.4 +0.6 36.2 10th 11.8 0.0 3.9 20th 11.5 32.5 low 35%
Wagin 23.2 -0.5 33.3 10th 10.0 -0.8 3.0 21st 9.9 28.4 low 35%
Wandering 24.4 -0.1 33.5 10th 8.3 -1.2 1.0 20th 23.2 29.6 average 78%
Eucla (district 11)
Balladonia 25.5 +0.5 36.1 11th 10.9 0.0 3.8 20th 16.0 19.6 average 82%
Eucla 26.0 +2.4 37.4 4th 13.8 +0.4 8.8 21st 12.4 26.4 average 47%
Eyre 26.9 +2.7 41.5 4th 11.1 -0.7 1.0 24th 18.7 24.5 average 76%
Forrest 27.9 +1.6 37.6 4th 12.3 +0.3 5.2 21st 8.6 16.7 average 51%
Red Rocks Point 25.2 +1.5 39.2 4th 14.4 +0.1 7.9 22nd 12.2 23.5 average 52%
South East (district 12)
Bulga Downs 29.1 +0.4 39.6 10th 14.5 +0.3 4.9 21st
Kalgoorlie-Boulder Airport 25.2 -0.1 40.1 11th 13.2 +0.5 4.1 21st 36.2 20.5 high 177%
Laverton Aero 29.2 +2.4 39.3 11th 16.1 +1.2 7.9 21st 24.2 19.6 average 123%
Leinster Aero 29.2 +1.4 38.8 4th 15.7 +0.3 6.3 21st 45.6 25.5 high 179%
Leonora Aero 29.2 +1.2 40.7 11th 15.7 +0.5 5.7 21st 14.4 15.8 average 91%
Munglinup West 24.2 -0.1 35.7 10th 11.3 -0.8 2.6 20th 11.4 31.2 low 37%
Norseman Aero 24.6 -0.7 36.9 11th 11.0 0.0 0.8 20th 28.8 24.5 average 118%
Salmon Gums Res.Stn. 24.0 +0.2 32.8 11th 10.2 +0.3 2.9 24th 12.0 26.5 average 45%
Southern Cross Airfield 25.2 -1.1 39.0 10th 11.1 -0.6 2.0 21st 4.4 22.1 low 20%
North East (district 13)
Carnegie 32.6 +2.4 38.5 14th 16.9 +0.7 9.0 23rd 14.4 22.5 average 64%
Giles Meteorological Office 32.3 +2.9 36.7 5th 17.9 +1.5 9.8 22nd 3.6 17.8 average 20%
Telfer Aero 36.5 +1.9 40.8 7th 22.4 +1.8 15.1 22nd 2.6 18.4 average 14%
Warburton Airfield 32.7 +3.2 38.4 14th 18.2 +2.9 10.0 21st 6.4 18.6 average 34%
Wiluna 30.7 +1.4 39.0 9th 15.0 -0.2 7.0 21st 27.6 28.6 high 97%
Wiluna Aero 31.1   39.2 8th 16.4   7.6 21st 17.2
Offshore Islands (district 200)
Adele Island 31.4   32.7 13th 27.3   23.8 7th
Browse Island 30.6   31.7 24th 27.8   24.4 10th
Rowley Shoals 29.9   32.4 1st     25.3 12th
Varanus Island 31.6 +0.3 36.1 1st 26.2 +0.1 22.8 20th 28.2 35.4 average 80%

Extremes Maps Records Summaries Important notes the top

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 10 am on Wednesday 1 May 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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