Western Australia in April 2010: Second warmest April for overnight temperature

  • 2nd highest mean minimum temperature on record for WA
  • 5th highest mean maximum temperature on record for WA
  • Near average rainfall for WA, but below average for the southwest

Rainfall

April rainfall was below to very much below average for western parts of WA including the Pilbara, inland Gascoyne, Central Wheatbelt and Great Southern. Several sites in the Central Wheatbelt registered no rainfall for the month. Above to very much above average rainfall occurred in eastern parts of the state including in the Kimberley, Interior, Goldfields and Eucla. Averaged across the state, the rainfall for April 2010 was near average, but was below average for southwest WA (southwest of a line from Jurien to Bremer Bay) (see April rainfall decile map).

Some sites had their highest April rainfall on record.

Maximum temperature

Above to very much above average mean maximum temperatures were recorded over central and eastern WA, with up to 4 °C above normal mean maxima in the central Interior. Below average mean maximum temperatures were mainly confined to the west coast, where up to 2 °C cooler than normal maxima occurred between Carnarvon and Geraldton (see April maximum temperature anomaly map). When averaged over the whole state, April 2010 saw the 5th highest mean maximum temperature since comparable records commenced in 1950.

Some sites had their highest April temperature on record.

Minimum temperature

Above to very much above average mean minimum temperatures were recorded across most of the state, with up to 4 °C above normal mean minima in the west Kimberley, southern Interior and Eucla (see April minimum temperature anomaly map). Similar to maximum temperatures, parts of west coast WA saw below average mean minima, along with parts of the South Coastal district, however departures from normal were generally less than 1 °C. When averaged over the whole state, April 2010 saw the 2nd highest mean minimum temperature on record.

Sites in the west Kimberley, east Pilbara, Interior, Goldfields and Southeast Coastal recorded their warmest April mean minima on record, with Broome Airport exceeding its previous highest minimum temperature for April of 29.3 °C on three occasions (29.4 °C on the 1st, 29.4 °C on the 4th and 29.6 °C on the 5th).

Some sites had their warmest April night (highest daily minimum temperature) on record. Some sites had their highest April mean daily minimum temperature on record.

Further information

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Extremes in April 2010
Hottest day 42.8 °C at Roebourne on the 1st
Warmest days on average 38.5 °C at Fitzroy Crossing Aero
Coolest days on average 20.7 °C at Albany
Coldest day 14.0 °C at Bickley on the 12th
Coldest night 0.1 °C at Bridgetown on the 25th
Coolest nights on average 8.4 °C at Jarrahwood
Warmest nights on average 27.9 °C at Troughton Island
25.9 °C at Broome Airport(mainland)
Warmest night 30.4 °C at Marble Bar on the 1st
Wettest overall 134.1 mm at Kuri Bay
Wettest day 90.0 mm at Cygnet Bay on the 16th
Highest wind gust 98 km/h at Cape Naturaliste on the 13th

Record highest total April rainfall
Total rainfall
for April 2010 (mm)
Previous highest
for April
Years of
record
Average for
April
Yundamindra 104.5 101.0 in 1966 110 19.9



Record highest April temperature
Highest temperature
in April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Meekatharra Airport 39.7 on the 1st 38.8 on the 3rd in 1957 61 29.2



Record highest April daily minimum temperature
Highest daily minimum
temperature
in April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Broome Airport 29.6 on the 5th 29.3 on the 1st in 2009 71 22.6
Port Hedland Airport 29.2 on the 1st 28.8 on the 3rd in 2009 62 21.4



Record highest April mean daily minimum temperature
Mean daily minimum
temperature
for April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Broome Airport 25.9 25.8 in 1992 70 22.6
Esperance 14.5 14.4 in 2003 40 13.2
Telfer Aero 23.7 23.4 in 2005 35 20.5
Warburton Airfield 19.5 18.7 in 2005 35 15.0
Yeelirrie 16.4 16.1 in 2005 35 13.9



Summary statistics for April 2010
Maximum temperatures
for April
(°C)
Minimum temperatures
for April
(°C)
Rainfall
for April
(millimetres)
Mean for
April
2010
Diff
from
average
Highest for
April
2010
Mean for
April
2010
Diff
from
average
Lowest for
April
2010
Total for
April
2010
Average
for
April
Rank of
April
2010
Fraction of
April
average
North Kimberley (district 01)
Doongan 33.8   37.2 5th 21.7   18.2 19th  
Kalumburu 35.1   38.8 6th 23.5   21.5 30th 78.0
Mount Elizabeth     36.7 5th 19.2   14.5 25th 98.4 37.9 high 260%
Troughton Island 33.2 +0.4 34.9 6th 27.9 +1.1 24.8 13th 29.2
Truscott 33.1   35.0 6th 25.2   22.2 2nd 128.2
Wyndham 35.9 -0.1 40.9 6th 25.4 +1.8 21.9 24th 92.4 28.9 v high 320%
Wyndham Aero 36.4   41.4 6th 25.4   22.4 24th 77.2
East Kimberley (district 02)
Argyle Aerodrome 35.7   39.7 6th 25.0   21.7 30th 15.4
Halls Creek Airport 34.6 +0.8 39.0 5th 22.5 +2.1 19.6 21st 47.4 20.4 v high 232%
Kununurra Aero 35.3   39.4 6th 23.8   19.7 24th 29.8 26.1 average 114%
Warmun 35.7 +0.5 40.5 6th 23.6 +3.0 20.0 19th 80.2 24.4 v high 329%
West Kimberley (district 03)
Bidyadanga 37.0 +1.4 40.6 21st 25.0 +3.0 20.9 20th 8.6 25.5 average 34%
Broome Airport 35.2 +0.9 38.4 12th 25.9 +3.3 21.9 20th 68.2 26.8 high 254%
Curtin Aero 37.7   39.7 12th 24.0   19.4 22nd 66.2
Derby Aero 37.0   39.3 5th 24.9   20.5 20th 2.8 25.9 average 11%
Fitzroy Crossing Aero 38.5   41.6 5th 23.1   19.1 25th 79.8
West Roebuck 36.3   39.1 12th 24.1   20.3 28th 19.4
De Grey (district 04)
Bedout Island 33.3   35.0 23rd 27.3   25.0 15th
Karratha Aero 34.8   39.7 20th 23.6   18.9 8th 0 18.3 lowest 0%
Legendre Island 32.1   34.0 30th 25.5   23.0 8th 0
Marble Bar 38.3   41.4 3rd 23.9   20.2 30th 0
Pardoo Station 36.3   39.2 27th 22.8   17.0 6th 2.0 19.5 average 10%
Port Hedland Airport 35.9 +0.7 39.2 27th 23.0 +1.6 19.2 8th 0 23.0 lowest 0%
Roebourne 37.8 +2.5 42.8 1st 23.0 +0.8 19.2 9th 0 28.8 lowest 0%
Roebourne Aero 37.2   42.0 1st 22.6   16.4 8th 0
Fortescue (district 05)
Barrow Island Airport 30.5   36.0 26th 24.1   22.2 11th 0
Learmonth Airport 34.1 +0.9 39.9 26th 19.8 -0.6 16.7 8th 0 16.1 lowest 0%
Mardie 35.6 -0.2 40.7 27th 21.7 +0.7 16.4 8th 0.4 19.9 average 2%
Onslow 33.6 +0.4 41.2 21st 21.5 +1.1 17.9 8th 0 20.2 lowest 0%
Onslow Airport 34.4 +0.7 40.9 21st 21.3 +0.1 18.1 8th 0 11.8 lowest 0%
Tom Price 34.3   38.2 1st 18.0   13.2 6th 3.0 31.0 low 10%
Wittenoom 36.3 +3.2 40.6 1st 23.2 +2.0 18.8 6th 0 28.7 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 28.3 -0.7 35.9 27th 18.8 -0.3 15.1 29th 2.0 13.8 average 14%
Denham 27.3   34.0 28th 20.2   16.4 5th 4.3 14.3 average 30%
Emu Creek Station 35.7 +0.8 40.1 26th 20.5 -0.2 16.8 8th 0 20.1 lowest 0%
Gascoyne Junction 33.3 +0.5 39.0 22nd 17.9 -0.7 14.0 25th 0 14.9 lowest 0%
Shark Bay Airport 30.1   36.6 28th 17.8   13.6 13th 3.6
East Gascoyne (district 07)
Newman Aero 34.5   39.5 2nd 20.5   15.4 29th 61.2 19.6 v high 312%
Paraburdoo Aero 36.2   40.4 1st 21.1   16.6 8th 1.4 26.5 low 5%
Murchison (district 07A)
Meekatharra Airport 31.9 +2.7 39.7 1st 18.4 +1.4 12.0 5th 6.0 20.7 average 29%
Mount Magnet Aero 29.6   35.9 18th 17.0   13.3 8th 5.4
North Coast (district 08)
Carnamah 27.7 +0.2 36.0 18th 14.9 +0.9 11.0 27th 3.7 22.7 low 16%
Dalwallinu 26.7   34.0 18th 12.7   8.3 27th 0.8
Dalwallinu Comparison 27.1 +0.5 34.3 18th 14.2 +0.7 10.9 4th 0.9 21.0 v low 4%
Geraldton Airport 26.6 -1.0 33.1 11th 15.3 -0.1 10.7 27th 10.8 23.9 average 45%
Kalbarri 28.6 -0.7 35.3 11th 16.0 -0.1 11.0 4th 13.8 18.6 average 74%
Morawa Airport 28.7   37.1 18th 13.8   9.1 27th 1.0
North Island 25.6   28.4 11th 19.7   15.2 16th 10.4
Wongan Hills 27.1 +0.8 33.8 18th 13.2 -0.1 10.0 24th 0.8 22.6 v low 4%
Central Coast (district 09)
Badgingarra Research Stn 25.9 -1.3 33.2 18th 13.4 0.0 9.8 13th 8.6 27.9 low 31%
Bickley 22.9   29.6 18th 12.6   7.3 24th 26.4 56.2 average 47%
Champion Lakes 24.6   31.5 18th 15.0   10.7 23rd 41.4
Garden Island HSF 23.2   28.3 1st 15.7   11.4 24th 32.4
Gingin Aero 26.3   33.8 18th 11.6   5.5 28th 19.8
Gooseberry Hill 24.6   31.9 18th 14.3   9.9 24th
Gosnells City 26.1   33.1 18th 14.4   10.0 23rd 33.0 44.3 average 74%
Jandakot Aero 25.3   31.9 18th 11.8   4.6 25th 49.8 43.1 average 116%
Karnet 22.8 -0.4 29.5 18th 12.2 +0.5 7.0 23rd 56.4 67.9 average 83%
Lancelin 24.9 -0.5 32.5 18th 13.9 -0.5 10.0 12th 23.0 31.1 average 74%
Medina Research Centre 25.2   32.6 18th 13.2   7.0 25th 30.6
Pearce RAAF 26.6 +0.3 33.2 18th 12.8 -0.5 7.7 26th 13.0 35.0 low 37%
Perth Airport 25.7 +0.2 32.5 18th 13.0 +0.1 7.3 28th 22.0 41.4 average 53%
Perth Metro 25.0   32.3 18th 13.7   7.8 24th 25.0
Rottnest Island 22.8   26.8 18th 17.0   12.9 24th 22.0
Swanbourne 24.4   31.8 18th 14.8   9.9 24th 45.0
South Coast (district 09A)
Albany 20.7 -0.1 25.5 14th 13.3 +0.6 7.9 27th 79.8 69.1 average 115%
Albany Airport 21.5 -0.3 26.1 29th 11.4 -0.2 5.0 25th 49.0 62.1 average 79%
Bridgetown 23.0   28.7 19th 9.1   0.1 25th 46.0
Bridgetown Comparison 23.4 +0.1 29.5 19th 9.4 +1.0 0.7 25th 41.2 46.0 average 90%
Bunbury 23.7   28.5 18th 11.1   2.6 25th 36.0
Busselton 23.3   28.9 19th 11.4   5.5 24th 59.2
Busselton Aero 23.9   28.6 18th 10.1   3.7 24th 33.8
Cape Leeuwin 21.3 +0.1 24.1 19th 15.4 0.0 11.6 13th 56.0 60.2 average 93%
Cape Naturaliste 22.0 +0.2 26.0 18th 14.0 +0.2 10.5 27th 54.8 43.7 high 125%
Collie East 24.0   30.7 19th 9.2   0.4 25th 33.2
Donnybrook 24.3 +0.3 30.0 2nd 11.4 +1.1 6.2 24th 51.4 49.5 average 104%
Dwellingup 22.8 +0.4 28.9 2nd 10.7 +0.5 3.7 25th 68.8 67.3 average 102%
Esperance 24.4 +1.3 35.1 13th 14.5 +1.3 8.3 25th 20.8 46.8 low 44%
Esperance Aero 24.5   33.4 13th 13.3   7.9 25th 27.6 41.4 average 67%
Harvey 24.7   30.8 2nd 12.1   7.5 23rd 34.0
Hopetoun North 23.9   34.6 13th 13.1   5.5 25th 18.0
Jarrahwood 23.8   29.0 19th 8.4   0.5 25th 68.8 48.0 high 143%
Mandurah 23.8   29.9 18th 15.3   10.9 24th 33.0
Manjimup 21.8 +0.8 27.3 19th 10.6 -0.1 4.9 24th 48.6 60.5 average 80%
North Walpole 21.4   25.6 18th 12.1   7.2 27th 28.0
Pemberton 21.8 +0.7 26.6 18th 10.8 -0.1 5.6 28th 51.6 75.2 average 69%
Rocky Gully 21.7   28.1 19th 9.7   3.8 24th 32.6
Shannon 21.0   26.2 18th 10.0   4.1 24th 37.2
Witchcliffe 22.0   26.4 2nd 10.1   3.4 25th 76.6
North Central (district 10)
Bencubbin 27.1 +1.4 34.2 2nd 13.1 +0.4 8.2 27th 0.6 23.0 v low 3%
Cunderdin Airfield 27.4   33.7 18th 11.3   4.5 25th 0
Kellerberrin     33.6 19th 10.6 -1.1 5.0 28th 0 21.4 lowest 0%
Merredin 27.4 +2.1 34.5 19th 13.0 +0.3 6.5 24th 0 23.2 lowest 0%
Northam 27.6 +1.5 34.0 18th 12.2 +0.2 5.2 28th 0.8 23.4 v low 3%
York 27.0   34.4 19th 10.1   2.2 25th 1.1
South Central (district 10A)
Beverley 26.9 +0.9 33.6 19th 11.0 -0.2 3.6 24th 3.2 23.2 low 14%
Brookton 25.5 +0.7 32.5 19th 11.3 +0.2 3.7 24th 5.8 26.2 low 22%
Corrigin 25.9 +1.8 33.0 19th 11.3 +0.2 3.5 24th 1.0 22.8 v low 4%
Hyden 27.5 +2.1 34.5 19th 11.0 0.0 2.5 24th 10.6 24.0 average 44%
Jacup 24.0   31.0 13th 10.6   4.1 27th 42.8
Katanning 23.4   30.5 19th 10.7   5.6 27th 4.8
Katanning Comparison 23.6 +0.8 31.0 19th 10.0 -0.3 3.7 24th 7.4 31.0 low 24%
Lake Grace 25.0   32.1 19th 11.7   4.8 24th 16.4
Lake Grace Comparison 25.1 +1.3 32.8 19th 11.9 +0.4 5.4 24th 15.8 23.4 average 68%
Narembeen 27.2 +1.5 34.7 19th 12.0 +0.1 4.5 24th 0 23.1 lowest 0%
Narrogin 23.8 +0.8 30.9 19th 10.7 +0.3 3.6 24th 9.8 30.0 low 33%
Newdegate Research Station 25.0   31.5 19th 10.4   3.5 25th 17.2 27.1 average 63%
Ongerup 23.7 +1.1 30.4 19th 10.9 -0.2 4.9 27th 24.4 26.6 average 92%
Pingelly 24.9 +1.0 32.0 19th 11.8 +0.1 5.0 24th 1.4 27.5 v low 5%
Ravensthorpe 24.8 +1.2 32.9 13th 12.4 +0.7 6.6 27th 27.9 33.6 average 83%
Wagin 24.0 +0.4 30.5 19th 10.4 -0.2 3.3 24th 14.7 29.3 average 50%
Wandering 24.9   31.9 19th 9.2   0.6 25th 14.2
Eucla (district 11)
Balladonia 26.5 +1.6 33.8 30th 12.4 +1.5 4.3 25th 18.4 20.0 average 92%
Eucla 25.4 +1.9 35.3 3rd 14.3 +1.0 7.4 28th 27.8 26.5 average 105%
Eyre 25.5 +1.5 36.4 14th 12.8 +0.9 2.7 28th 34.6 25.5 high 136%
Forrest 27.4   35.1 4th 14.0   7.9 28th 21.0
Red Rocks Point 24.4   34.0 15th 14.8   8.1 28th 30.4
South East (district 12)
Bulga Downs 30.0   36.5 19th 15.6   10.5 28th 16.2 21.1 average 77%
Kalgoorlie-Boulder Airport 27.1 +1.9 34.2 20th 15.1 +2.5 8.7 28th 11.8 21.2 average 56%
Laverton Aero 28.6   35.5 21st 16.9   10.4 28th 39.0
Leinster Aero 29.5   35.5 1st 17.3   11.4 28th 56.6
Leonora 29.1 +1.2 35.5 21st 16.9 +2.1 10.5 28th 31.2 20.6 high 151%
Leonora Aero 29.0   35.6 21st 17.1   11.5 28th 23.0
Munglinup West 25.2   33.8 13th 12.4   7.0 24th 20.6
Norseman 26.8 +2.3 34.6 20th 12.2 +0.6 5.0 27th 26.8 23.6 average 114%
Norseman Aero 26.7   34.4 20th 11.7   3.2 28th 18.0
Salmon Gums Res.Stn. 26.0 +2.4 33.4 20th 10.8 +0.9 2.9 28th 1.0 27.5 v low 4%
Southern Cross Airfield 27.7   34.9 19th 11.5   4.9 28th 5.6
Yeelirrie 30.8 +2.1 37.4 1st 16.4 +2.5 9.5 28th 41.2 24.9 high 165%
North East (district 13)
Balgo Hills 35.2   41.3 6th 22.2   18.2 30th 41.0 18.1 high 227%
Carnegie 32.5   39.0 3rd 18.5   12.3 28th 73.9 22.9 v high 323%
Giles Meteorological Office 32.1 +2.8 37.5 7th 18.9 +2.5 13.0 28th 2.0 16.3 average 12%
Telfer Aero 37.5 +3.0 41.0 3rd 23.7 +3.2 20.4 11th 4.0 17.9 average 22%
Warburton Airfield 32.8 +3.6 38.5 4th 19.5 +4.5 13.2 28th 14.4 19.0 average 76%
Wiluna 32.1 +2.9 38.3 1st 18.0 +3.0 10.2 7th 15.2 29.2 average 52%

Notes

A Monthly Climate Summary is prepared to list 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, usually published in the fourth week of the month.

This statement has been prepared based on information available at 10 am on Monday 3 May 2010. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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 30 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.

Further information

Media
(03) 9669 4057
Enquiries