Western Australia in autumn 2013: Warm days and nights

  • Rainfall: near average for WA
  • Maximum temperature: above average for WA
  • Minimum temperature: 7th warmest on record for both WA and southwest WA

Rainfall

Rainfall during autumn 2013 was above average across large parts of eastern and southern WA. A particulary wet season was observed in the southern Goldfields, western Eucla, and Southeast Coastal and some sites recording their wettest autumn on record. The remaining Southwest Land Division (SWLD) saw generally near average rainfall during autumn, with small patches of above average rainfall scattered across the Division and a small area below average in the inland South Coastal and Great Southern. The remainder of the state was generally near average, apart from patches of below average rainfall in the Pilbara and Gascoyne.

Averaged across WA as a whole, autumn 2013 rainfall was near average for the State, with near average rainfall in March and April followed by above average rainfall in May. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) also saw near average rainfall, with the 12th wettest March followed by below average rainfall in April, and a near average May. For the SWLD as a whole, autumn rainfall was above average.

The passage of ex-tropical cyclone Rusty through central parts of the State at the start of March, after crossing the coast east of Port Hedland on 27 February, brought heavy rainfall to parts of the Southern Interior and Goldfields. Several sites in the western Southern Interior and Goldfields observed their wettest autumn day on record on the 1st and 2nd, including Glen-Ayle (Southern Interior) with a daily total of 177.5 mm in the 24 hours to 9am on the 1st. The SWLD received notable autumn rainfall on 14 May as a result of a nearby middle level trough. Widespread falls between 30 mm and 50 mm were reported in the Lower West and Great Southern, whilst Chesalon in the western Southeast Coastal reported 63.2 mm in the 24 hours to 9am on the 15th, its highest autumn daily fall in 48 years of record.

A strong cold front and deep pre-frontal trough combined to produce widespread moderate rainfall in the SWLD and neighbouring Gascoyne between 25 and 27 March. Widespread falls between 20 and 40 mm were reported, whilst Desert Fringe in the southeast Great Southern recorded 80.0 mm on the 26th, its highest autumn daily fall in 34 years of record and the highest daily fall reported during the event.

A band of middle level cloud moved across the southern half of WA between 17 and 19 April, bringing rain and isolated thunderstorms with some moderate falls mainly in the 10 mm to 35 mm range. A thunderstorm produced a heavy downpour at Mount William (Southwest) during the evening of the 17th with 16.0 mm recorded in the 10 minute period ending 2125 WST, which is considered a one in ten year event. Lorinna in the Southeast Coastal observed 61.2 mm in the 24 hours to 9am on the 18th, its wettest autumn day in 42 years of record.

Numerous unseasonal rainfall events occurred across northern WA in May 2013. Rain and thunderstorms were common across the Kimberley from 12 to 24 May with some heavy falls reported. Very heavy rainfall in excess of 150 mm was reported on the northern Dampier Penninsula on the 19th and 20th as Cygnet Bay observed 155.4 mm in the 24 hours to 9am on the 21st, its wettest May day in 50 years of record, and Lombadina Airstrip reported 182.5 mm, the highest daily rainfall total in WA for autumn 2013. Cape Leveque recorded 157.7 mm on the 21st, which contributed significantly to its autumn total rainfall of 409.9 mm, the highest autumn 2013 total rainfall in WA.

Maximum temperature

Mean daily maximum temperatures during autumn 2013 were above to very much above average throughout much of WA, with an area of highest on record in the eastern Eucla. The only areas to experience near average daytime maxima were parts of the southeastern SWLD, southern Goldfields, far west Pilbara, east Pilbara, far south Kimberley, and northern Northern Interior. Maximum temperatures were up to 2 °C above average through much of central and eastern WA, grading to up to 4 °C above average in the eastern Eucla.

When averaged across the state, the mean maximum temperature for autumn 2013 was above average, primarily due to WA recording its third warmest April on record along with a near average March and May. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) also recorded an above average maximum temperature when averaged across the season, with a cooler than normal March combining with the third warmest April and a near average May.

Cold days were observed through the SWLD on the last two days of May as a strong cold front and a pool of cold air moved over the area. Maximum temperatures were particularly low on the 30th, when Manjimup and Jacup observed just 9.4 °C, the lowest maxima in WA for the season. It was Jacup's lowest autumn maximum temperature in 20 years of record, whilst Manjimup equalled its lowest autumn maximum temperature in its 54 years of record. Ongerup registered its lowest maximum temperature for autumn in 46 years of record with 9.5 °C, and Wagin equalled its record low autumn maximum in 41 years with 10.6 °C.

Minimum temperature

Mean daily minimum temperatures during autumn 2013 were above to very much above average throughout virtually all of the State, with areas of highest on record in the Eucla and adjacent parts of the Southeast Coastal. Esperance in the Southeast Coastal observed its warmest autumn in 43 years of record, with a mean minimum temperature of 14.4 °C, breaking the previous record of 13.9 °C set in 2005. The only areas to experience near average overnight minima were small parts of the Kimberley and central WA. Minimum temperatures were up to 2 °C above average through much of southern and eastern WA, grading to up to 4 °C above average in the Eucla.

When averaged across the state, the mean minimum temperature for autumn 2013 ranked as 7th highest on record since comparable records commenced in 1910, with an above average March followed by the 5th warmest April and 9th warmest May on record. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) also recorded its 7th warmest autumn on record, with a near average March, the warmest April since comparable records commenced in 1910, and an above average May.

Light winds and partly cloudy conditions after a hot day on 7 March resulted in very warm overnight temperatures in the Pilbara and Gascoyne. Gascoyne Junction observed a minimum of 32.1 °C on the 8th, the warmest night in WA during autumn 2013, and an autumn record in 43 years for the site. Cloudy conditions and warm northerly winds on 26 March resulted in Eucla observing its warmest autumn overnight temperature in 54 years of record with a minimum of 27.1 °C.

A cold morning was experienced across the SWLD on the last day of May 2013, with mimimum temperatures dropping to below 5 °C at numerous sites and a number of sites registering sub-zero temperatures. A minimum of 3.3 °C at Lancelin (Lower West) on the 31st was its lowest autumn temperature in 47 years of record.

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Extremes in autumn 2013
Hottest day 46.0 °C at Roebourne on 20 Mar
Warmest days on average 36.1 °C at Roebourne
36.1 °C at Wyndham Aero
Coolest days on average 21.1 °C at Albany
Coldest day 9.4 °C at Jacup on 30 May
9.4 °C at Manjimup on 30 May
Coldest night -0.6 °C at Collie East on 31 May
Coolest nights on average 9.7 °C at Jarrahwood
Warmest nights on average 27.1 °C at Troughton Island
24.2°C at Truscott
Warmest night 32.1 °C at Gascoyne Junction on 8 Mar
Wettest overall 409.9 mm at Cape Leveque
Wettest day 182.5 mm at Lombadina Airstrip on 21 May
Highest wind gust 111 km/h at Mount Magnet Aero on 16 Mar
111 km/h at Warburton Airfield on 26 Mar

Maps

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

Record highest autumn daily rainfall
Highest daily rainfall
in autumn 2013 (mm)
Previous wettest
for autumn
Years of
record
Menzies 83.0 on 2 Mar 70.4 on 5 Apr 1934 111
Ora Banda 102.6 on 1 Mar 56.0 on 11 Mar 2000 79
Glen-Ayle 177.5 on 1 Mar 106.4 on 2 Mar 2011 64
Chesalon 63.2 on 15 Mar 57.0 on 20 Mar 1993 48
Cowarna Downs 60.2 on 2 Mar 48.6 on 2 Mar 1974 44
Lorinna 61.2 on 18 Apr 55.6 on 11 Mar 2000 42
Desert Fringe 80.0 on 26 Mar 56.4 on 16 Apr 1998 34
Granite Peak 81.0 on 1 Mar 70.0 on 9 Apr 2003 33



Record highest total autumn rainfall
Total rainfall
for autumn 2013 (mm)
Previous wettest
for autumn
Years of
record
Average for
autumn
Balladonia 266.4 255.4 in 1992 101 75.4
Erinair 313.5 308.4 in 1971 46 137.1
Telina Downs 279.0 253.1 in 1974 46 132.6
Beaumont West 229.0 215.5 in 1992 31 114.4



Record lowest autumn daily maximum temperature
Lowest daily maximum
temperature
in autumn 2013 (°C)
Previous coolest
for autumn
Years of
record
Average for
autumn
Manjimup 9.4 on 30 May = 9.4 on 28 May 1993 54 21.2
Ongerup 9.5 on 30 May 10.0 on 1 May 1968 46 22.5
Wagin 10.6 on 30 May = 10.6 on 28 May 1993 41 23.7



Record highest autumn daily minimum temperature
Highest daily minimum
temperature
in autumn 2013 (°C)
Previous warmest
for autumn
Years of
record
Average for
autumn
Eucla 27.1 on 26 Mar 26.5 on 11 Mar 2005 54 13.2
Gascoyne Junction 32.1 on 8 Mar 31.2 on 7 Mar 1988 43 18.3



Record lowest autumn temperature
Lowest temperature
in autumn 2013 (°C)
Previous coolest
for autumn
Years of
record
Average for
autumn
Lancelin 3.3 on 31 May 3.9 on 25 May 1979 47 14.6



Record highest autumn mean daily minimum temperature
Mean daily minimum
temperature
for autumn 2013 (°C)
Previous warmest
for autumn
Years of
record
Average for
autumn
Esperance 14.4 13.9 in 2005 43 13.1



Summary statistics for autumn 2013
Maximum temperatures
for autumn
(°C)
Minimum temperatures
for autumn
(°C)
Rainfall
for autumn
(millimetres)
Mean for
autumn
2013
Diff
from
average
Highest for
autumn
2013
Mean for
autumn
2013
Diff
from
average
Lowest for
autumn
2013
Total for
autumn
2013
Average
for
autumn
Rank of
autumn
2013
Fraction of
autumn
average
North Kimberley (district 01)
Doongan 33.0 +0.6 37.0 17 Mar 19.5 +1.0 9.4 27 May 258.6 289.8 average 89%
Kalumburu 34.5 +0.7 37.9 23 Apr 21.2 +0.8 12.4 26 May 74.2 276.7 v low 27%
Mount Elizabeth 32.5 +0.9 37.0 22 Mar 17.8 +1.4 7.6 27 May 186.6 217.4 average 86%
Troughton Island 32.3 +0.4 34.3 21 Mar 27.1 +0.9 23.6 21 May 270.4 219.4 high 123%
Truscott 32.7   35.4 6 May 24.2   17.1 26 May 228.6
Wyndham 35.5 +0.4 40.0 21 Mar 23.5 +0.3 13.6 26 May 135.3 205.4 average 66%
Wyndham Aero 36.1 +0.9 40.5 23 Mar 23.5 +0.9 12.8 26 May 104.4 193.8 low 54%
East Kimberley (district 02)
Argyle Aerodrome 35.0 +1.1 40.4 23 Mar 22.7 +0.7 13.8 27 May 205.8 196.0 average 105%
Halls Creek Airport 33.6 +0.6 39.8 23 Mar 20.8 +0.8 11.7 27 May 178.4 116.9 high 153%
Kununurra Aero 35.3 +0.8 39.3 18 Mar 21.6 0.0 11.3 27 May 168.6 193.0 average 87%
Warmun 35.1 +0.7 40.8 23 Mar 20.8 +0.5 11.0 27 May 132.6 156.7 average 85%
West Kimberley (district 03)
Bidyadanga 34.3 -0.2 39.5 16 Apr 22.6 +0.8 14.8 30 Apr 99.8 148.2 average 67%
Broome Airport 33.4 +0.2 38.2 24 Apr 23.4 +1.3 15.0 27 May 146.4 155.1 average 94%
Curtin Aero 35.9 +0.8 40.7 20 Mar 21.6 -0.2 13.3 28 May 218.8 241.3 average 91%
Derby Aero 34.9 +0.5 39.8 24 Apr 22.7 +0.5 14.3 26 May 233.2 181.1 high 129%
Fitzroy Crossing Aero 35.9 +0.6 41.5 23 Mar 20.7 +0.6 10.1 26 May 213.0 172.3 average 124%
West Roebuck 34.3 +0.1 39.4 24 Apr 22.5 +1.8 13.0 26 May 136.2 215.3 average 63%
De Grey (district 04)
Karratha Aero 34.1 +0.7 43.1 20 Mar 23.0 +0.9 14.8 15 May 61.2 93.4 average 66%
Legendre Island 31.9   39.0 20 Apr 25.1   15.7 15 May
Mandora 34.8 -0.2 41.3 24 Mar 21.3 +0.8 13.0 3 May 61.0 119.3 average 51%
Marble Bar 35.3 +0.5 43.4 20 Mar 21.6 +0.3 13.5 16 May 88.6 112.9 average 78%
Port Hedland Airport 34.6 +0.4 41.4 20 Apr 22.1 +1.1 13.3 23 May 64.4 99.0 average 65%
Roebourne 36.1 +1.7 46.0 20 Mar 22.7 +0.8 14.4 15 May 47.0 120.0 average 39%
Fortescue (district 05)
Barrow Island Airport 30.9 +0.3 37.8 19 Mar 24.5 +0.4 17.8 15 May 37.2 153.6 low 24%
Learmonth Airport 32.8 +0.1 43.1 21 Mar 20.1 +0.3 11.4 23 May 71.2 97.0 average 73%
Mardie 35.2 +0.2 45.3 20 Mar 22.0 +1.3 12.4 21 May
Onslow Airport 33.7 +0.7 45.6 21 Mar 22.3 +1.4 13.5 15 May 33.0 134.1 low 25%
Wittenoom 33.7 +1.2 41.5 20 Mar 20.9 +0.4 10.8 22 May 50.4 124.0 average 41%
West Gascoyne (district 06)
Carnarvon Airport 30.0 +1.0 41.3 13 Mar 19.1 +0.4 9.1 31 May 13.6 65.1 low 21%
Denham 28.9 +0.4 42.5 8 Mar 19.8 +0.4 8.0 31 May 31.6 65.2 average 48%
Emu Creek Station 34.8 +0.4 44.6 7 Mar 20.6 +0.4 12.0 15 May 80.3 95.6 average 84%
Murchison 31.4 +0.8 41.2 18 Mar     4.5 31 May 34.2 73.6 low 46%
Shark Bay Airport 30.9 0.0 43.9 8 Mar 18.4 +0.4 10.0 23 May 39.4 47.5 average 83%
East Gascoyne (district 07)
Newman Aero 32.5 +1.3 41.4 19 Mar 18.3 +1.5 7.7 16 May 37.6 74.6 low 50%
Paraburdoo Aero 34.3 +1.3 43.2 17 Mar 20.1 +1.0 8.6 16 May
Murchison (district 07A)
Meekatharra Airport 30.3 +1.2 41.5 18 Mar 17.2 +0.4 5.5 31 May 52.8 72.0 average 73%
Mount Magnet Aero 29.8 +1.3 40.2 19 Mar 16.7 +0.7 5.1 31 May 55.6 73.1 average 76%
North Coast (district 08)
Carnamah 28.0 +0.3 39.4 10 Apr 15.0 +1.0 4.4 31 May 109.9 93.8 average 117%
Dalwallinu 26.8 -0.3 37.5 11 Apr 13.8 +0.7 3.8 31 May 88.4 70.7 average 125%
Geraldton Airport 28.1   40.3 8 Mar 15.6   5.6 31 May 138.0
Geraldton Airport Comparison 28.2 +0.6 40.7 8 Mar 15.6 +0.2 5.2 31 May 135.6 108.9 high 125%
Kalbarri 29.5 +0.1 41.4 8 Mar 16.5 +0.3 7.3 22 May 92.2 88.2 average 105%
Morawa Airport 28.9 +0.1 38.8 11 Apr 15.0 +0.8 4.8 31 May 110.2 68.8 high 160%
Mullewa 29.7 +1.0 40.0 8 Mar 16.1 +1.3 6.0 31 May 84.8 84.0 average 101%
North Island 26.4 +0.1 31.5 8 Mar 20.2 -0.1 11.4 1 May 120.2 67.1 high 179%
Wongan Hills 26.4 +0.1 37.2 11 Apr 13.9 +0.7 2.5 31 May 105.1 95.0 average 111%
Central Coast (district 09)
Badgingarra Research Stn 26.5 -0.8 37.2 8 Apr 14.1 +0.6 4.4 31 May 176.8 113.5 high 156%
Bickley 23.4 -0.3 35.1 8 Apr 13.2 +0.8 3.9 31 May 280.0 209.4 high 134%
Champion Lakes 25.4   35.8 8 Apr 15.5   3.9 31 May 212.0
Garden Island HSF 23.9 -0.4 35.7 8 Apr 16.6 +0.6 9.2 31 May 216.6 137.0 high 158%
Gingin Aero 26.4 -0.4 37.8 8 Apr 12.8 +0.7 -0.4 31 May
Gosnells City 26.6 0.0 38.5 8 Apr     3.0 31 May 238.2 166.2 high 143%
Jandakot Aero 25.8 0.0 37.0 8 Apr 13.1 +0.8 0.5 31 May 245.0 166.7 high 147%
Karnet 23.5 0.0 35.0 8 Apr 12.7 +1.1 2.7 31 May 248.9 231.8 average 107%
Lancelin 26.0 +0.4 37.0 9 Mar 14.7 +0.1 3.3 31 May 148.5 129.9 high 114%
Medina Research Centre 26.0 +0.3 38.1 8 Apr 14.2 +0.9 2.1 31 May 217.6 161.2 high 135%
Pearce RAAF 26.9 +0.6 39.4 8 Apr 14.0 +0.6 0.6 31 May 169.9 134.5 high 126%
Perth Airport 26.2 +0.5 37.7 8 Apr 14.0 +0.9 1.6 31 May 176.0 156.4 average 113%
Perth Metro 26.0 0.0 37.3 8 Apr 14.4 +0.8 3.5 31 May 228.8 180.1 high 127%
Rottnest Island 23.7 0.0 32.6 8 Apr 17.5 +0.4 9.6 31 May 247.0 151.7 high 163%
Swanbourne 25.9 +0.4 36.9 9 Mar 15.4 +0.4 5.0 31 May 230.8 151.4 high 152%
South Coast (district 09A)
Albany 21.1 +0.5 34.4 4 Apr 14.5 +1.8 6.7 29 May 246.3 224.5 average 110%
Albany Airport Comparison 21.3 -0.4 34.4 4 Apr 12.4 +0.8 3.5 29 May
Bridgetown 22.8 -0.9 34.7 8 Apr 10.1 +0.9 -0.1 31 May 214.2 168.8 high 127%
Busselton Aero 24.0 -0.3 33.4 1 Mar 11.6 +0.4 4.5 31 May 254.2 156.0 high 163%
Cape Leeuwin 21.9 +0.9 30.6 4 Apr 16.3 +1.0 9.8 31 May 271.0 227.0 high 119%
Cape Naturaliste 23.1 +1.3 30.5 9 Mar 14.7 +0.9 6.9 31 May 230.2 181.7 high 127%
Collie East 23.5 -0.7 34.9 8 Apr 10.0 +1.1 -0.6 31 May
Donnybrook 24.5 +0.5 35.2 8 Apr 12.2 +1.7 0.6 31 May 270.2 207.0 high 131%
Dwellingup 23.4 +0.7 34.7 8 Apr 11.6 +1.3 2.0 31 May 330.2 250.4 high 132%
Esperance 22.9 -0.1 36.8 4 Mar 14.4 +1.3 6.8 25 May 303.8 147.9 v high 205%
Esperance Aero 23.5 +0.3 35.8 11 Apr 13.4 +0.8 6.5 14 May 259.4 143.3 v high 181%
Harvey 24.7 -0.5 35.8 8 Apr 13.3 +0.8 1.5 31 May 282.7 178.0 high 159%
Jarrahwood 24.1 +0.2 34.7 3 Apr 9.7 +0.7 0.2 31 May 287.2 192.8 high 149%
Mandurah 24.3 -0.1 34.2 9 Mar 16.4 +0.6 8.0 31 May 170.2 153.3 average 111%
Manjimup 21.6 +0.4 34.4 8 Apr 11.8 +1.1 3.2 31 May 254.0 220.6 high 115%
North Walpole 21.3   33.8 4 Apr 13.3   6.9 19 May 313.4
Pemberton 21.9 +0.6 33.5 8 Apr 12.5 +1.5 4.9 31 May 338.2 262.4 high 129%
Rocky Gully 21.6 -0.5 35.0 8 Apr 11.5 +0.6 3.8 29 May 130.0 157.0 average 83%
Windy Harbour 21.6 -0.2 31.4 4 Apr 13.1 +1.0 3.5 26 May 267.1 242.3 average 110%
Witchcliffe 22.9 +0.1 32.9 1 Mar 11.8 +0.7 3.9 26 May 329.0 225.5 high 146%
North Central (district 10)
Bencubbin 26.4 +0.5 37.2 11 Apr 13.9 +1.2 4.1 31 May 69.6 82.2 average 85%
Cunderdin Airfield 26.4 -0.1 38.1 11 Apr 13.3 +1.4 3.5 23 May 76.6 69.8 average 110%
Kellerberrin 26.4 +0.8 38.8 11 Apr 12.0 +0.3 2.5 24 May 93.2 83.7 average 111%
Merredin 26.4 +0.9 38.0 11 Apr 13.6 +1.0 3.7 31 May 97.6 84.1 high 116%
Northam 26.4 +0.3 37.0 9 Apr 13.2 +1.3 3.0 23 May 132.3 96.9 high 137%
York 26.2 -0.2 37.2 8 Apr 12.1 +1.4 2.2 31 May 130.3 79.3 high 164%
South Central (district 10A)
Beverley 26.6 +0.4 37.4 9 Apr 12.6 +1.3 2.6 31 May 104.6 93.0 average 112%
Brookton 25.1 +0.1 37.2 9 Apr 12.5 +1.5 3.0 19 May 123.7 100.7 high 123%
Corrigin 25.1 +0.8 37.1 10 Apr 12.4 +1.4 2.1 23 May 85.1 90.7 average 94%
Hyden 25.7 +0.1 38.2 10 Apr     1.0 23 May 108.4 81.9 high 132%
Katanning 22.5 -0.9 35.5 8 Apr 11.6 +0.7 4.1 31 May 145.4 96.1 high 151%
Lake Grace 23.9 -0.4 36.3 9 Apr 12.8 +1.2 4.7 31 May 138.8 72.0 v high 193%
Narembeen 26.1 +0.4 37.6 10 Apr 13.5 +1.8 4.4 23 May 93.5 81.9 average 114%
Narrogin 23.6 +0.6 36.0 9 Apr 11.8 +1.4 2.9 24 May 118.2 112.8 average 105%
Newdegate Research Station 23.6 -0.6 35.7 9 Apr 11.2 +1.2 2.1 24 May 137.2 91.7 high 150%
Ongerup 22.4 -0.1 35.0 8 Apr 12.0 +1.0 4.0 29 May 123.2 92.2 high 134%
Pingelly 24.4 +0.3 36.4 9 Apr 12.9 +1.1 3.6 31 May 135.2 101.9 high 133%
Ravensthorpe 23.4 -0.1 35.9 9 Apr 12.6 +0.9 5.4 14 May 207.8 109.0 v high 191%
Wagin 23.3 -0.4 35.0 8 Apr 12.2 +1.6 4.2 24 May 163.1 103.5 high 158%
Wandering 24.1 -0.6 36.6 9 Apr 10.6 +1.2 0.2 31 May 162.6 98.5 high 165%
Eucla (district 11)
Eucla 25.6 +2.3 38.9 4 Mar 14.9 +1.7 7.2 17 May 104.0 80.4 high 129%
Eyre 25.6 +1.9 38.4 25 Mar 12.4 +0.6 1.0 11 May 141.1 91.5 high 154%
Red Rocks Point 24.4   37.8 3 Mar 15.4   7.9 31 May 97.6
South East (district 12)
Bulga Downs 29.4 +0.8 40.9 18 Mar 14.8 +0.8 3.0 31 May 57.2 70.6 average 81%
Kalgoorlie-Boulder Airport 25.4 +0.3 35.8 25 Mar 13.9 +1.4 4.9 12 May 176.2 72.9 v high 242%
Laverton Aero 28.6 +2.3 40.0 19 Mar 16.0 +1.5 5.7 22 May 88.4 70.2 average 126%
Leinster Aero 29.0 +1.6 39.2 19 Mar 15.9 +0.9 3.9 23 May 100.4 74.0 average 136%
Leonora 28.6 +0.9 40.0 18 Mar 15.6 +1.1 4.6 25 May 119.5 73.6 high 162%
Leonora Aero 28.6   39.3 19 Mar 15.8   5.4 31 May 113.8
Munglinup West 23.4 -0.6 36.5 9 Apr 12.9 +1.0 6.5 24 May
Norseman Aero 24.6 -0.4 36.3 11 Apr 12.0 +1.4 1.0 23 May 166.2 80.9 high 205%
Salmon Gums Res.Stn. 23.5 -0.2 36.3 4 Mar 11.2 +1.3 0.0 24 May 204.2 87.7 v high 233%
Southern Cross Airfield 26.5 +0.4 37.7 25 Mar 12.9 +1.6 1.7 23 May 58.2 88.6 average 66%
Yeelirrie     39.6 19 Mar 14.1 +0.6 3.0 25 May 94.2 81.4 average 116%
North East (district 13)
Carnegie 31.6 +1.9 42.4 19 Mar 16.1 +0.5 5.5 16 May 102.4 72.4 high 141%
Giles Meteorological Office 29.8 +0.9 39.3 20 Mar 17.5 +1.4 6.5 16 May 131.0 72.1 high 182%
Telfer Aero 33.7 +0.1 43.1 16 Mar 20.8 +0.9 11.8 26 May 63.0 116.3 average 54%
Warburton Airfield 30.9 +1.7 42.1 20 Mar 17.1 +2.0 6.4 24 May 73.8 65.0 average 114%
Wiluna 30.4 +1.4 41.0 18 Mar     5.1 15 May 161.8 90.2 high 179%
Offshore Islands (district 200)
Christmas Island Aero 28.6 +0.5 30.0 11 Mar 24.0 +0.6 21.7 10 May 1113.0 706.2 v high 158%
Cocos Island Airport 30.1 +0.4 31.5 7 May 25.9 +0.8 22.4 25 May 735.6 679.3 average 108%
Varanus Island 31.0 +0.4 39.0 21 Mar 25.7 +0.2 17.8 15 May 17.6 103.6 low 17%

Notes

A Seasonal 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 3 pm on Monday 3 June 2013. 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 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
Enquiries