Western Australia in April 2016: Very warm days and nights

For Western Australia, mean maximum temperature in April 2016 was 1.7 °C above normal, and ranked as the ninth-highest on record. The state-wide mean minimum temperature was approximately 1.5 °C above average, and ranked as the sixth-highest on record. Rainfall in April 2016 was near average for Western Australia as a whole, but for the South West Land Division rainfall was above average.

  • Ninth-highest mean maximum temperature for WA
  • Sixth-highest mean minimum temperature for WA
  • Near average rainfall for WA; above average rainfall in South West Land Division
  • Driest northern wet season in the Kimberley for 11 years

Below average to very much below average rainfall was reported in parts of the Pilbara, Kimberley, and Northern and Southern Interior in April 2016 as a relatively dry end to the northern west season was reported. In contrast, above average to very much above average rainfall was observed in northern and western parts of the South West Land Division (SWLD), with many locations observing their wettest April for 24 years or longer. For WA as a whole, rainfall in April 2016 was near the long-term average, but for the South West Land Division rainfall for April was above average. In the Kimberley, the rainfall total for the northern wet season (October 2015 to April 2016) averaged across the region was about 556 mm, which is about 100 mm lower than the long-term average, and the driest wet season for 11 years, since 2004-5.

Mean maximum temperatures in April 2016 were above to very much above average over the northern half of the State, with a number of sites in the Kimberley and Pilbara recording their warmest April on record. Most of the southern half of the State had near average mean maximum temperatures, though below average mean maxima were recorded in large parts of the SWLD. For WA as a whole, the mean maximum temperature was 1.7 °C above the long-term average, and ranked as the ninth-highest on record.

Unusually hot days were recorded in north and inland central WA in the first half of the month, particularly from the 3rd to 5th, and on the 9th and 10th, and many sites experienced their hottest day in April on record during these periods. Mardie recorded 13 days in total with temperatures at or above 40 °C, which exceeded its previous April record of 11 such days in 1993 and 2005. Cold days were reported in the far southwest of the State towards the end of the month, with daily maxima in the mid- to low-teens. Rocky Gully in the South Coastal district recorded a daily maximum of 13.4 °C on the 30th, which was the lowest daily maximum temperature of the month in WA, and it was also the coldest April day for eight years since a daily maximum of 12.2 °C was recorded on 19 April 2008 at Rocky Gully.

Apart from near average mean minimum temperatures in the far northeast, most of the State saw above to very much above average mean minimum temperatures. The state-wide mean minimum temperature was approximately 1.5 °C above the long-term average, and ranked as the sixth-highest on record. For the SWLD as a whole, the mean minimum temperature was about 1.7 °C above the average, and also ranked as the sixth-highest on record.

Nights were abnormally warm in northern WA in the first half of the month, with several locations in the Gascoyne and Kimberley setting new records for highest minimum temperature in April. Cold nights were observed in the south towards the end of the month, and Eyre near the Eucla coast recorded the first sub-zero temperature for the year in WA with a minimum of -0.6 °C on the 28th.

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Extremes in April 2016
Hottest day 43.2 °C at Onslow Airport on the 2nd
Warmest days on average 39.5 °C at Marble Bar
Coolest days on average 20.1 °C at Shannon
Coldest day 13.4 °C at Rocky Gully on the 30th
Coldest night -0.6 °C at Eyre on the 28th
Coolest nights on average 10.9 °C at Collie East
Warmest nights on average 29.0 °C at Rowley Shoals
24.7 °C at Broome Airport
24.7 °C at Derby Aerodrome
Warmest night 30.1 °C at Marble Bar on the 11th
Warmest on average overall 31.8 °C at Derby Aero
31.8 °C at Marble Bar
Coolest on average overall 16.0 °C at Rocky Gully
16.0 °C at Shannon
Wettest overall 139.2 mm at Wereroa
Wettest day 57.4 mm at Happy Valley on the 12th
Strongest wind gust 93 km/h at Laverton Aero on the 19th

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
Gingin Aero 43.6 on the 26th 35.0 on the 16th in 2007 20



Highest April total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
April
Bolgart 69.9 91.3 in 1961* 23.8
Beverley 86.5 90.8 in 1974 23.6
Nungarin 69.3 135.0 in 1974 22.6
Trayning 64.3 114.2 in 1974 21.4
Three Springs 64.0 142.4 in 1975 23.6
Lancelin 64.5 123.8 in 1974* 31.8
Dandaragan West 64.4 75.2 in 1980* 31.9
Wannamal 63.8 64.6 in 1980* 28.7
Bindi Bindi East 56.8 61.0 in 1984 21.1
New Norcia 62.8 =62.8 in 1980* 25.5
Yorkrakine 61.4 67.8 in 1984* 23.1
Boyup Brook 118.5 129.3 in 1985* 37.8
Dongara 62.2 68.3 in 1984* 23.0
Gidgegannup 81.2 89.0 in 1987* 45.1
Spring Valley 42.2 82.4 in 1988* 24.9
Badgingarra Research Stn 46.2 78.2 in 1992 28.0
Ballidu 49.6 64.0 in 1992 21.5
Berkshire Valley 50.2 69.2 in 1992 22.5
Cowcowing 61.8 79.0 in 1992 21.7
Kondut 66.6 72.6 in 1992 22.5
Wongan Hills 55.8 75.8 in 1992 22.6
Yandanooka 63.8 95.0 in 1992 22.8
Anro 58.7 70.8 in 1992* 20.0
Cadoux 53.4 92.2 in 1992* 25.1
Highfields 53.6 97.6 in 1992* 23.0
Konnongorring 48.0 49.6 in 1992* 20.5
Mindalla 48.6 77.5 in 1992* 21.8
Strawberry 76.0 88.4 in 1995 25.6
Cuballing 46.2 48.8 in 1991* 29.3

* 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
Broome Airport 41.0 on the 10th = 41.0 on the 15th in 2005 77 34.3
Port Hedland Airport 42.5 on the 4th 42.4 on the 6th in 1986 68 35.2
Meekatharra Airport 40.6 on the 4th 39.7 on the 1st in 2010 67 29.2
Wittenoom 42.0 on the 5th 41.3 on the 1st in 1970 63 33.1
Wiluna 40.0 on the 4th = 40.0 on the 4th in 1957 57 29.2
Emu Creek Station 43.0 on the 3rd 42.6 on the 14th in 2005 44 34.9
Learmonth Airport 41.8 on the 4th 41.4 on the 13th in 2005 42 33.1
Telfer Aero 42.3 on the 3rd 41.2 on the 10th in 1987 42 34.5
Yeelirrie 40.7 on the 4th 38.5 on the 2nd in 1993 42 28.9
Troughton Island 36.3 on the 9th 36.1 on the 25th in 1968 37 32.7
Derby Aero 41.5 on the 10th 40.7 on the 2nd in 2014 32 35.5
Cygnet Bay 39.1 on the 5th 38.0 on the 23rd in 2005 29 33.5
Murchison 40.0 on the 3rd = 40.0 on the 13th in 2002 27 30.9
Warburton Airfield 39.7 on the 5th 39.3 on the 1st in 2012 26 29.4
Curtin Aero 41.5 on the 10th 41.2 on the 13th in 2005 25 36.4
Laverton Aero 38.0 on the 4th 37.2 on the 12th in 2005 25 26.7
Mount Elizabeth 37.0 on the 13th = 37.0 on the 14th in 2005 23 32.5
Leinster Aero 39.7 on the 4th 38.5 on the 8th in 2005 22 27.7
Mount Magnet Aero 38.4 on the 4th 37.5 on the 12th in 2005 21 28.8
Paraburdoo Aero 41.6 on the 5th 40.4 on the 1st in 2010 21 33.4
Newman Aero 40.9 on the 5th 40.4 on the 12th in 2005 20 31.7



Record highest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Port Hedland Airport 38.7 38.2 in 2005 67 35.2
Wittenoom 36.7 36.6 in 2005 62 33.1
Mardie 39.2 38.9 in 1981 60 35.8
Bidyadanga 38.2 38.1 in 1958 57 35.7
Mandora 39.0 38.7 in 2005 54 36.1
Warmun 38.2 38.0 in 2002 53 35.1
Onslow Airport 37.7 36.0 in 2005 49 33.7
Emu Creek Station 37.4 37.2 in 2005 43 34.9
Learmonth Airport 35.9 35.4 in 2005 41 33.1
Telfer Aero 37.9 = 37.9 in 2005 41 34.5
Troughton Island 34.6 34.3 in 2009 36 32.7
Derby Aero 38.9 37.7 in 2005 31 35.5
Kununurra Aero 37.5 37.3 in 2002 30 35.3
Cygnet Bay 36.6 36.4 in 2005 28 33.5
Curtin Aero 39.4 38.8 in 2005 24 36.4
Karratha Aero 36.8 36.4 in 2005 22 34.2
Argyle Aerodrome 37.5 37.4 in 2002 21 34.9
Paraburdoo Aero 36.4 36.2 in 2013 20 33.4

Highest April mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
April
Broome Airport 36.8 37.0 in 1981 34.3



Record highest April daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Carnarvon Airport 25.7 on the 13th 25.6 on the 5th in 1955 70 19.1
Meekatharra Airport 25.1 on the 4th 24.9 on the 8th in 1986 67 17.0
Christmas Island Aero 26.5 on the 24th 26.1 on the 23rd in 2005 44 23.5
Troughton Island 29.9 on the 18th 29.8 on the 17th in 2009 37 26.9
Derby Aero 28.7 on the 8th 28.1 on the 11th in 2002 32 22.7
Argyle Aerodrome 28.8 on the 7th = 28.8 on the 13th in 1998 22 22.8



Record highest April mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Troughton Island 28.6 28.4 in 2009 36 26.9

Highest April mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
April
Paraburdoo Aero 22.1 22.4 in 1996 19.6



Record highest April mean temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Broome Airport 30.8 30.7 in 2005 76 28.4
Port Hedland Airport 31.1 31.0 in 2005 67 28.3
Mardie 31.2 30.4 in 1987 60 28.4
Onslow Airport 30.5 29.7 in 2005 49 27.5
Christmas Island Aero 26.8 26.7 in 2004 43 25.9
Emu Creek Station 29.8 = 29.8 in 2005 43 27.8
Troughton Island 31.6 31.4 in 2009 36 29.8
Derby Aero 31.8 31.3 in 2005 31 29.1
Curtin Aero 31.2 = 31.2 in 2005 24 29.3
Argyle Aerodrome 30.9 30.8 in 1998 21 28.9
Paraburdoo Aero 29.1 29.0 in 2005 20 26.5



Summary statistics for April 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2016
Diff
from
average
Highest for
April
2016
Mean for
April
2016
Diff
from
average
Lowest for
April
2016
Total for
April
2016
Average
for
April
Rank of
April
2016
Fraction of
April
average
North Kimberley (district 01)
Doongan 35.1 +2.0 36.4 10th 19.2 +0.3 13.5 26th 38.0 49.3 average 77%
Kalumburu 38.0 +3.3 40.2 18th 20.9 -0.2 15.6 25th 22.0 36.0 average 61%
Mount Elizabeth 34.6 +2.1 37.0 13th 16.7 -0.1 11.2 26th 15.2 40.1 average 38%
Troughton Island 34.6 +1.9 36.3 9th 28.6 +1.7 26.9 26th 0 30.8 lowest 0%
Wyndham Aero 39.3 +2.7 41.2 5th 23.9 +0.5 19.1 26th 2.0 27.1 average 7%
East Kimberley (district 02)
Argyle Aerodrome 37.5 +2.6 39.2 10th 24.4 +1.6 21.4 25th 0 26.4 lowest 0%
Halls Creek Airport 36.4 +2.6 38.9 6th 21.6 +1.2 17.5 26th 0 21.3 lowest 0%
Kununurra Aero 37.5 +2.2 39.1 5th 21.5 -0.4 17.2 26th 57.2 30.9 high 185%
Warmun 38.2 +3.1 40.1 7th 21.0 +0.4 16.3 26th 1.2 25.5 average 5%
West Kimberley (district 03)
Bidyadanga 38.2 +2.5 42.1 10th 24.3 +2.2 19.0 26th 0.1 25.0 average 0%
Broome Airport 36.8 +2.5 41.0 10th 24.7 +2.1 19.5 26th 0.2 25.9 low 1%
Curtin Aero 39.4 +3.0 41.5 10th 22.9 +0.7 18.0 26th 1.0 40.8 low 2%
Cygnet Bay 36.6 +3.1 39.1 5th     19.8 25th 0 41.1 lowest 0%
Derby Aero 38.9 +3.4 41.5 10th 24.7 +2.0 20.5 26th 0.6 24.7 low 2%
Fitzroy Crossing Aero 39.2 +2.6 41.0 11th 21.2 +0.5 15.7 25th 6.6 30.3 average 22%
De Grey (district 04)
Bedout Island 34.0   36.3 10th 27.3   26.0 26th
Karratha Aero 36.8 +2.6 41.0 18th 24.4 +1.8 20.6 15th 0 17.2 lowest 0%
Legendre Island 33.7   37.3 17th 26.1   23.9 16th
Mandora 39.0 +2.9 43.1 10th 22.0 +1.3 16.5 26th 0.2 19.3 average 1%
Marble Bar 39.5 +3.5 43.0 5th 24.1 +2.2 20.6 17th
Port Hedland Airport 38.7 +3.5 42.5 4th 23.4 +2.0 19.0 23rd 0 21.9 lowest 0%
Roebourne Aero 38.8 +2.8 42.2 18th 22.3 +0.6 18.1 15th 0 8.7 v low 0%
Fortescue (district 05)
Barrow Island Airport 33.2 +2.2 38.1 3rd 25.0 +0.5 22.0 23rd 0 37.4 v low 0%
Learmonth Airport 35.9 +2.8 41.8 4th 20.7 +0.3 14.5 29th 0 18.1 lowest 0%
Mardie 39.2 +3.4 42.4 1st 23.3 +2.2 19.4 30th 0 19.6 lowest 0%
Onslow Airport 37.7 +4.0 43.2 2nd 23.3 +2.0 17.9 30th 0 11.9 lowest 0%
Wittenoom 36.7 +3.6 42.0 5th 23.4 +2.2 19.0 22nd 21.4 28.1 average 76%
West Gascoyne (district 06)
Carnarvon Airport 30.7 +1.6 37.1 7th 20.0 +0.9 13.5 29th 1.4 13.5 average 10%
Denham 28.6 0.0 34.5 24th 20.4 +0.6 14.5 29th 3.0 14.0 average 21%
Emu Creek Station 37.4 +2.5 43.0 3rd 22.3 +1.6 16.0 29th 0 20.9 lowest 0%
Shark Bay Airport 31.1 +0.2 36.9 24th 18.7 +0.4 11.8 29th 4.2 9.8 average 43%
East Gascoyne (district 07)
Newman Aero 34.6 +2.9 40.9 5th 20.1 +2.7 15.1 16th 2.6 20.2 average 13%
Paraburdoo Aero 36.4 +3.0 41.6 5th 22.1 +2.5 17.3 29th 0.8 25.8 v low 3%
Murchison (district 07A)
Meekatharra Airport 30.5 +1.3 40.6 4th 18.1 +1.1 7.3 29th 7.6 19.2 average 40%
Mount Magnet Aero 28.7 -0.1 38.4 4th 16.9 +0.7 9.2 29th 10.6 19.3 average 55%
Paynes Find 27.3 -1.1 35.9 3rd 14.8 +0.6 8.6 28th 28.8 26.1 high 110%
North Coast (district 08)
Dalwallinu 24.9 -2.2 33.5 3rd 14.6 +1.4 8.6 27th 45.0 14.5 v high 310%
Geraldton Airport 27.4   34.1 3rd 17.3   11.9 28th 71.2
Kalbarri 28.7 -0.7 33.9 22nd 17.4 +1.1 12.0 29th 26.4 20.2 average 131%
Morawa Airport 27.2 -1.7 36.5 3rd 15.9 +1.5 9.2 28th 63.2 18.8 v high 336%
Mullewa 28.4 -0.3 38.2 3rd 17.0 +1.9 10.6 28th 34.8 21.7 high 160%
North Island 26.0 -0.3 29.8 8th 20.0 -0.4 15.3 24th 20.4 18.4 average 111%
Wongan Hills 24.9 -1.5 34.0 3rd 14.4 +1.0 9.2 27th 55.8 22.6 v high 247%
Central Coast (district 09)
Badgingarra Research Stn 25.2 -2.0 34.7 3rd 14.4 +0.8 9.7 27th 46.2 28.0 high 165%
Bickley 21.8 -1.8 31.0 3rd 13.4 +0.7 7.9 27th 105.4 56.7 high 186%
Garden Island HSF 23.6 -0.3 30.2 16th 17.0 +0.9 11.5 27th 33.8 41.0 average 82%
Gingin Aero 25.2 -1.5 34.3 3rd 14.0 +1.9 7.6 28th 94.8 29.9 v high 317%
Gosnells City 25.3 -1.2 34.0 3rd 16.3 +1.5 10.0 28th 57.8 44.0 average 131%
Jandakot Aero 24.9 -0.9 33.0 3rd 14.3 +1.9 8.6 28th 62.2 42.8 average 145%
Jurien Bay 25.5 -0.9 30.3 23rd 15.9 +1.9 10.3 7th 76.9 30.7 v high 250%
Lancelin 24.8 -0.8 32.0 16th 15.9 +1.4 8.7 6th 64.5 31.8 v high 203%
Pearce RAAF 25.1 -1.3 34.3 3rd 14.9 +1.5 8.9 28th 68.2 35.3 v high 193%
Perth Airport 25.0 -0.6 33.9 3rd 14.6 +1.6 9.2 6th 57.0 41.0 average 139%
Perth Metro 25.0 -0.9 33.8 3rd 15.3 +1.5 10.1 27th 68.2 43.8 high 156%
Rottnest Island 23.3 -0.5 29.4 16th 17.4 +0.1 11.9 27th 46.8 35.6 high 131%
Swanbourne 24.3 -1.2 32.3 16th 16.3 +1.1 10.1 27th 90.8 41.5 v high 219%
South Coast (district 09A)
Albany 20.6 -0.3 26.0 23rd 14.6 +1.8 9.0 27th 94.6 68.9 high 137%
Albany Airport 20.9   30.0 3rd 12.2   7.2 8th 108.0
Bridgetown 21.7 -1.8 30.1 3rd 11.1 +1.8 4.7 27th 84.2 51.6 average 163%
Bunbury 23.1 -1.2 28.5 3rd 13.2 +1.5 6.0 30th 98.6 39.2 v high 252%
Busselton Aero 23.1 -1.0 29.1 3rd 12.5 +1.5 5.4 6th 41.2 35.7 average 115%
Cape Leeuwin 21.5 +0.2 29.2 23rd 16.3 +0.8 12.4 27th 30.6 59.5 low 51%
Cape Naturaliste 22.6 +0.7 28.2 3rd 14.7 +0.8 9.6 6th 35.2 43.8 average 80%
Collie East 22.5 -1.3 31.5 3rd 10.9 +2.0 3.3 27th 36.8 47.3 average 78%
Donnybrook 23.1 -1.0 29.0 2nd 12.7 +2.3 6.6 6th 90.2 50.0 high 180%
Dwellingup 22.3 -0.2 32.0 3rd 12.6 +2.3 6.1 30th 79.0 66.6 average 119%
Esperance 23.6 +0.4 33.1 24th 14.0 +0.7 8.4 22nd 39.6 45.5 average 87%
Esperance Aero 24.0 +0.5 33.0 24th 13.0 +0.3 7.6 22nd 37.0 40.2 average 92%
Jarrahwood 23.0 -0.8 30.5 3rd 11.0 +2.4 3.5 6th 106.4 49.5 v high 215%
Mandurah 23.7 -0.4 29.2 10th 16.5 +0.7 11.2 27th 42.6 42.9 average 99%
Manjimup 21.1 0.0 29.2 3rd 11.9 +1.1 6.7 30th 67.4 60.2 average 112%
North Walpole 20.7 -0.8 29.1 3rd 13.3 +0.5 8.7 27th 134.8 91.5 high 147%
Rocky Gully 20.4 -1.7 30.0 3rd 11.6 +0.7 5.3 7th 91.4 54.6 high 167%
Shannon 20.1 -1.5 28.5 3rd 12.0 +1.2 7.1 7th 92.2 69.6 average 132%
Witchcliffe 22.1 -0.5 29.8 3rd 12.9 +1.8 7.3 2nd 48.6 67.1 average 72%
North Central (district 10)
Bencubbin 24.1 -1.7 33.0 3rd 14.0 +1.2 8.3 27th 30.7 22.7 high 135%
Cunderdin Airfield 24.2 -2.4 33.4 3rd 13.8 +1.7 7.8 28th 57.2 25.9 v high 221%
Merredin 23.8 -1.7 32.5 3rd 14.0 +1.2 8.2 27th 55.8 23.1 v high 242%
Northam 24.2 -1.9 33.3 3rd 13.8 +1.8 6.8 28th 49.3 23.6 high 209%
York 24.0 -2.4 33.0 3rd 13.1 +2.2 7.0 28th 60.6 23.5 v high 258%
South Central (district 10A)
Beverley 24.0 -2.2 33.0 3rd 13.4 +2.1 7.3 28th 86.5 23.6 v high 367%
Brookton 23.0 -2.0 32.1 3rd 12.5 +1.3 6.4 27th 86.6 26.2 v high 331%
Corrigin 22.9 -1.4 31.6 3rd 12.8 +1.6 5.4 27th 44.2 23.3 high 190%
Hyden 23.9 -1.8 31.8 3rd 12.4 +1.3 4.5 27th 25.9 23.7 average 109%
Jacup 21.9 -1.1 30.3 3rd 11.6 +0.8 5.8 27th 0.8 41.6 lowest 2%
Katanning 20.9 -2.5 30.0 3rd 12.1 +1.0 5.5 27th 36.6 30.9 average 118%
Lake Grace 22.5 -1.8 30.7 3rd 12.9 +1.0 5.6 27th 42.0 26.5 average 158%
Narembeen 23.6 -2.3 32.5 3rd 13.5 +1.5 6.9 27th 22.9 22.9 average 100%
Narrogin 22.1 -1.0 31.1 3rd 12.0 +1.5 4.4 27th 50.9 29.6 high 172%
Newdegate Research Station 22.3 -2.0 30.4 3rd 11.2 +1.0 5.3 27th 30.6 27.0 average 113%
Ongerup 21.4 -1.4 30.0 3rd 12.1 +0.9 6.0 27th 36.8 26.2 high 140%
Ravensthorpe 22.7 -1.0 32.0 3rd 13.1 +1.3 7.0 7th 22.1 33.0 average 67%
Wagin 21.9 -1.8 31.4 3rd     7.1 30th 40.6 28.9 high 140%
Wandering 22.5 -2.1 32.1 3rd 11.5 +2.0 3.8 30th
Eucla (district 11)
Balladonia 25.9 +0.9 36.0 4th 12.7 +1.8 7.4 29th 12.7 19.8 average 64%
Eucla 24.1 +0.5 33.2 1st 13.4 0.0 8.3 29th 16.6 26.8 average 62%
Eyre 25.7 +1.6 36.6 25th 11.0 -0.8 -0.6 28th 18.6 24.9 average 75%
Forrest 26.1 -0.1 33.9 1st 12.3 +0.3 7.2 24th 8.6 18.2 average 47%
Red Rocks Point 23.9 +0.2 35.3 25th 14.4 +0.1 8.6 28th 11.0 26.4 low 42%
South East (district 12)
Bulga Downs 27.7 -1.0 39.3 4th 14.7 +0.4 6.8 29th 21.0 20.9 average 100%
Kalgoorlie-Boulder Airport 25.3 +0.1 37.4 4th 14.5 +1.8 8.4 27th 8.6 20.6 average 42%
Laverton Aero 26.7 0.0 38.0 4th 15.1 +0.2 6.8 29th 13.8 20.1 average 69%
Leinster Aero 27.9 +0.2 39.7 4th 15.7 +0.3 8.0 29th 22.0 25.8 average 85%
Leonora Aero 27.0   39.1 4th 15.1   9.4 29th 10.6 17.4 average 61%
Munglinup West 23.7 -0.6 31.9 24th 12.5 +0.4 5.7 27th 27.4 33.6 average 82%
Norseman Aero 24.8 -0.5 35.5 4th 11.9 +1.0 4.1 27th 13.2 25.3 average 52%
Salmon Gums Res.Stn. 24.1 +0.3 33.6 4th 11.3 +1.4 3.2 22nd 32.8 27.1 average 121%
Southern Cross Airfield 25.0 -1.2 34.4 4th 13.4 +1.8 5.6 27th 32.2 24.4 average 132%
Yeelirrie 29.6 +0.7 40.7 4th 14.6 +0.7 4.7 29th 13.3 24.3 average 55%
North East (district 13)
Carnegie 31.5 +1.4 40.1 4th 17.3 +1.1 10.8 30th 6.4 22.5 average 28%
Giles Meteorological Office 31.6 +2.2 36.8 5th 16.9 +0.5 13.7 13th 0.6 16.9 low 4%
Telfer Aero 37.9 +3.4 42.3 3rd 23.2 +2.6 19.1 26th 1.4 19.2 average 7%
Warburton Airfield 31.8 +2.4 39.7 5th 17.7 +2.5 12.3 30th 0 18.4 lowest 0%
Offshore Islands (district 200)
Browse Island 32.7   34.0 11th     29.6 9th
Christmas Island Aero 29.1 +0.8 30.6 12th 24.5 +1.0 22.4 16th 411.8 227.3 v high 181%
Cocos Island Airport 30.8 +1.0 32.1 15th 26.3 +1.1 23.5 9th 166.8 252.4 low 66%
Rowley Shoals 31.2   34.2 23rd 29.0   27.9 30th
Note: Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

Notes

The Monthly climate summary 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 9 am on Monday 2 May 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

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