Western Australia in summer 2012-13: A very hot summer

  • Rainfall: above average for WA
  • Maximum temperature: 10th highest on record for WA; 2nd highest on record for southwest WA
  • Minimum temperature: 5th highest on record for WA; 4th highest on record for southwest WA

Rainfall

Rainfall during summer 2012-13 was above to very much above average in the west Kimberley, Pilbara, western Northern Interior, Gascoyne, and northern and western parts of the Southwest Land Division (SWLD). Below to very much below average rainfall was confined to pockets in the north and east Kimberley, eastern parts of the Southern Interior and Eucla, and the Southeast Coastal.

Averaged across WA as a whole, summer rainfall was above average for the State, mainly as a result of a wet December followed by near average rainfall for WA in January and February. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), as well as the SWLD, also recorded an above average summer rainfall, largely due to some extreme falls in December and above average rainfall in January.

Two heavy rainfall events in the SWLD in the first half of December 2012 were notable as sites registered record daily rainfall for summer. A deep surface trough across northern and western WA combined with a middle level disturbance to the west brought showers and thunderstorms to much of northern and western WA on the 5 and 6 December 2012. North Stirlings in the Great Southern district recorded daily rainfall of 81.8 mm on the 6th, which was its wettest summer day in 54 years of record. A few days later, a deep surface trough interacted with a slow moving middle level low off the WA west coast to produce widespread showers and thunderstorms across most of WA from the 10th to 13th. The heaviest rainfall was reported during the 24 hours to 9am on the 13th with the highest fall being 210.8 mm at Yourdamung Lake, northeast of Collie in the Southwest district. This was the fifth highest daily rainfall total on record in the SWLD for any month. Please refer to Special Climate Statement 42 for further information. Collie in the Southwest district recorded a daily total of 157.2 mm on the 13th, which was its wettest summer day in 110 years of record. Burekup in the Lower West also received 92.0 mm on the same day, more than twice the amount of its previous daily record for summer in 61 years of record.

Tropical cyclones Mitchell and Narelle moved through WA waters during late December and early January respectively, but neither had a significant impact on WA rainfall during summer 2012-13. Tropical cyclone Peta moved over the central Pilbara coast as a category one system on 23 January and brought some localised heavy falls, the highest daily total being 261.6 mm at Hooley on 24 January. Flooding impacts were generally localised and mostly minor. Severe tropical cyclone Rusty brought heavy rainfall to the east Pilbara and west Kimberley in the last week of February, with the highest daily fall during the event being 263.4 mm at Bamboo Creek in the east Pilbara on the 28th, although the rain gauge overflowed so the actual total was likely higher than this. Major flooding of the De Grey river was reported as a result of the slow moving severe tropical cyclone.

Maximum temperature

Mean daily maximum temperatures during summer 2012-13 were above to very much above average throughout southern half of WA, as well as in the west Kimberley, west Pilbara, and the eastern Northern Interior, as mean maxima in the Shark Bay region of the west Gascoyne were up to 4 °C above normal during summer 2012-13. Several sites along the WA west coast recorded their hottest summer on record including Carnarvon, Geraldton, Jurien Bay, Perth, Manjimup, and Pemberton, whilst Ongerup in the South Coastal also broke its summer record.

When averaged across the state, the mean maximum temperature for summer 2012-13 ranked as 10th highest on record from comparable records back to 1910. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) recorded its second hottest summer on record, as a result of recording its sixth hottest December, an above average January, and the fifth hottest February. The summer of 2012-13 in the Lower Southwest was only slightly behind the summer of 2009-10, the hottest on record.

Record high summer temperatures occurred in the first half of January across inland central and eastern WA as a significant heatwave was reported across inland Australia (see Special Climate Statement 43 for details). A number of sites in the southern Gascoyne, Goldfields, Eucla, and Southern Interior registered record high summer temperatures on 3, 8, 9, and 16 January, and the highest summer temperature recorded in WA occurred during this event with 49.0 °C at Leonora on the 9th, the highest temperature recorded in the town in 57 years of record. In contrast, the passage of tropical cyclone Rusty east of Port Hedland late in February brought relatively mild temperatures to the region as a result of overcast conditions, high winds, and heavy rainfall. Port Hedland Airport recorded its mildest summer day in 65 years of record with a maximum of 23.9 °C on the 27th.

Minimum temperature

Minimum temperatures were above to very much above average through much of WA in summer 2012-13, though large parts of the Kimberley, southeast Pilbara, and northeast Gascoyne recorded near average mean minimum temperatures. Mean minima were up to 3 °C above normal in the west Pilbara, and parts of the Northern and Southern Interior, and a number of sites in the west Pilbara, Great Southern, South Coastal, and Southern Interior recorded their warmest or equal warmest summers on record in terms of minimum temperatures.

When averaged across the state, the mean minimum temperature for WA for summer 2012-13 was very much above average, and ranked as the fifth highest since comparable records commenced in 1910. The Lower Southwest similarly was very much above average and recorded its fourth warmest summer in terms of overnight temperatures.

An unusually warm night was recorded across large parts of southern WA on 7 and 8 January following a hot day on the 7th, with cloud over the region and warm northeasterly winds. Merredin in the Central Wheat Belt, and Jarrahwood and Cape Leeuwin in the Southwest recorded their highest summer minimum temperatures in the 24 hours to 9 am on the 8th. Cape Leeuwin recorded a minimum of 24.2 °C, its highest summer minimum temperature in 107 years of recording, and second highest minimum for any month, only behind 24.4 °C recorded on 3 March 1961.

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Extremes in summer 2012-13
Hottest day 49.0 °C at Leonora on 9 Jan 2013
Warmest days on average 40.5 °C at Emu Creek Station
Coolest days on average 23.5 °C at Albany
Coldest day 16.6 °C at Mount Barker on 12 Dec 2012
Coldest night 3.8 °C at Wandering on 1 Dec 2012
3.8 °C at Eyre on 30 Jan 2013
Coolest nights on average 13.1 °C at Rocky Gully
Warmest nights on average 27.5 °C at Varanus Island
26.9°C at Karratha Airport
Warmest night 33.5 °C at Wiluna on 9 Jan 2013
Wettest overall 872.0 mm at Kalumburu
Wettest day

263.4 mm at Bamboo Creek on 28 Feb (rain gauge overflow)

Highest wind gust 119 km/h at Port Hedland Airport on 26 Feb 2013

Maps


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

Record highest summer daily rainfall
Highest daily rainfall
in summer 2012-13 (mm)
Previous wettest
for summer
Years of
record
Collie 157.2 on 13 Dec 2012 118.4 on 21 Jan 1982 110
Burekup 92.0 on 13 Dec 2012 45.7 on 18 Feb 1914 61
North Stirlings 81.8 on 6 Dec 2012 61.0 on 25 Feb 1980 54

 



Record highest summer temperature
Highest temperature
in summer 2012-13 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Meekatharra Airport 47.1 on 8 Jan 2013 45.7 on 5 Jan 2008 63 37.1
Giles Meteorological Office 45.7 on 16 Jan 2013 44.8 on 28 Jan 2011 57 36.3
Leonora 49.0 on 9 Jan 2013 47.8 on 17 Jan 1958 57 35.8
Wiluna 48.0 on 8 Jan 2013 46.9 on 25 Dec 1990 57 37.1
Eucla 48.2 on 3 Jan 2013 47.9 on 3 Jan 1979 54 25.5
Yeelirrie 47.9 on 8 Jan 2013 46.0 on 11 Feb 1991 40 36.7
Paynes Find 47.2 on 8 Jan 2013 46.6 on 3 Feb 2007 34 36.2



Record lowest summer daily maximum temperature
Lowest daily maximum
temperature
in summer 2012-13 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Port Hedland Airport 23.9 on 27 Feb 2013 25.6 on 13 Feb 1961 65 36.4



Record highest summer mean daily maximum temperature
Mean daily maximum
temperature
for summer 2012-13 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Perth Metro 32.3 32.0 in 2010,2009,1977 116 30.4
Manjimup 28.9 28.1 in 1966 72 26.3
Geraldton Airport Comparison 33.9 33.5 in 1999 69 31.2
Pemberton 27.8 27.2 in 2011 68 25.5
Carnarvon Airport 33.8 33.3 in 1973 66 31.0
Jurien Bay 32.2 31.9 in 2010 43 29.6
Ongerup 30.1 29.9 in 1972 42 27.9




Record highest summer daily minimum temperature
Highest daily minimum
temperature
in summer 2012-13 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Cape Leeuwin 24.2 on 8 Jan 2013 23.9 on 19 Feb 1959 107 16.7
Merredin 29.7 on 8 Jan 2013 29.4 on 27 Feb 1997 48 17.2
Jarrahwood 26.0 on 8 Jan 2013 24.3 on 12 Jan 1978 34 12.5



Record highest summer mean daily minimum temperature
Mean daily minimum
temperature
for summer 2012-13 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Albany 17.0 = 17.0 in 2010 93 14.8
Narrogin 15.7 = 15.7 in 1977 85 13.6
Corrigin 17.0 16.7 in 1977 63 15.2
Mardie 26.3 25.9 in 2010 55 24.4
Onslow Airport 26.1 25.8 in 2010 46 23.8
Emu Creek Station 25.6 = 25.6 in 1979 40 24.0
Learmonth Airport 24.7 24.6 in 2010 37 22.6
Hyden 16.7 16.5 in 2010 36 15.1
Warburton Airfield 24.4 24.1 in 2010 36 22.0


Summary statistics for summer 2012-13
Maximum temperatures
for summer
(°C)
Minimum temperatures
for summer
(°C)
Rainfall
for summer
(millimetres)
Mean for
summer
2012-13
Diff
from
average
Highest for
summer
2012-13
Mean for
summer
2012-13
Diff
from
average
Lowest for
summer
2012-13
Total for
summer
2012-13
Average
for
summer
Rank of
summer
2012-13
Fraction of
summer
average
North Kimberley (district 01)
Doongan 33.8 +0.4 38.1 7 Feb 2013 22.6 -0.2 17.9 10 Dec 2012 601.7 778.2 low 77%
Kalumburu 34.4 +0.3 38.6 6 Dec 2012 24.4 -0.2 21.3 9 Feb 2013 872.0 846.7 average 103%
Mount Elizabeth 33.7 +0.6 39.3 8 Dec 2012 22.3 +0.2 19.5 12 Jan 2013 642.8 653.4 average 98%
Truscott 33.7   37.8 6 Dec 2012 25.6   20.9 25 Dec 2012 703.4
Wyndham 37.2 +0.2 42.9 7 Dec 2012 26.4 0.0 21.7 27 Dec 2012 550.7 540.2 average 102%
Wyndham Aero 37.5 +0.8 43.8 7 Dec 2012 26.2 -0.1 20.9 29 Jan 2013 529.0 543.0 average 97%
East Kimberley (district 02)
Argyle Aerodrome 37.8 +1.4 44.0 7 Dec 2012 26.0 +0.4 21.4 19 Dec 2012 346.0 476.4 low 73%
Halls Creek Airport 37.3 +0.6 43.5 8 Dec 2012 24.6 +0.4 20.4 19 Dec 2012 287.6 376.3 low 76%
Kununurra Aero 37.1 +1.1 43.2 6 Dec 2012 24.9 -0.2 20.6 27 Dec 2012 565.4 550.6 average 103%
Warmun 37.8 +0.5 42.8 16 Jan 2013 25.2 +0.4 21.6 19 Dec 2012 398.1 469.6 average 85%
West Kimberley (district 03)
Bidyadanga 36.0 +1.5 45.3 9 Dec 2012 26.7 +0.9 23.1 26 Feb 2013 509.8 319.0 high 160%
Broome Airport 34.9 +1.5 43.0 9 Dec 2012 26.7 +0.5 20.6 8 Feb 2013 396.4 414.1 average 96%
Curtin Aero 37.5 +0.8 43.4 8 Dec 2012 24.8 -0.1 21.3 2 Jan 2013 574.6 581.5 average 99%
Cygnet Bay 34.5 +0.6 38.7 5 Dec 2012 25.7 +0.3 20.4 10 Feb 2013 620.0 497.1 average 125%
Fitzroy Crossing Aero 38.6 +0.9 45.0 8 Dec 2012 25.3 +0.1 21.0 17 Jan 2013 375.4 462.3 low 81%
West Roebuck 35.8 +1.2 45.0 9 Dec 2012 25.8 +0.6 19.5 8 Feb 2013 326.4 544.4 v low 60%
De Grey (district 04)
Karratha Aero 36.8 +1.1 41.6 8 Jan 2013 26.9 +0.6 19.4 13 Feb 2013 147.2 141.0 average 104%
Legendre Island 34.1   38.4 22 Feb 2013 27.4   23.2 22 Jan 2013
Mandora 37.2 +1.1 44.2 7 Jan 2013 26.1 +1.2 20.1 30 Jan 2013 452.0 221.4 v high 204%
Marble Bar 39.8 -1.0 45.3 24 Dec 2012 25.8 -0.5 19.9 28 Feb 2013 329.0 188.4 high 175%
Pardoo Station 37.5 +1.4 44.5 7 Jan 2013     21.0 12 Dec 2012        
Port Hedland Airport 37.0 +0.6 42.8 7 Jan 2013 26.2 +1.2 19.7 1 Dec 2012 256.4 176.3 average 145%
Roebourne 38.5 0.0 44.6 24 Dec 2012 26.5 +0.7 21.0 1 Dec 2012 233.8 139.4 high 168%
Roebourne Aero 38.1 -0.5 44.4 24 Dec 2012 26.0 +0.3 19.4 1 Dec 2012 265.0 163.9 high 162%
Fortescue (district 05)
Learmonth Airport 38.6 +1.2 46.9 6 Feb 2013 24.7 +2.1 16.5 1 Dec 2012 79.4 82.9 average 96%
Mardie 38.3 +0.6 46.3 6 Feb 2013 26.3 +1.9 18.4 1 Dec 2012
Onslow Airport 37.6 +1.4 46.8 8 Jan 2013 26.1 +2.3 21.1 2 Dec 2012 126.6 110.2 average 115%
Wittenoom 37.6 -1.4 45.0 9 Jan 2013 24.8 -0.8 19.9 28 Feb 2013 515.6 272.3 high 189%
West Gascoyne (district 06)
Carnarvon Airport 33.8 +2.8 44.9 1 Feb 2013 23.6 +1.4 16.9 1 Dec 2012 40.4 38.7 high 104%
Denham 32.7 +2.2 45.0 1 Feb 2013         29.8 25.6 high 116%
Emu Creek Station 40.5 +0.1 47.3 23 Dec 2012 25.6 +1.6 19.0 1 Dec 2012 176.9 128.0 high 138%
Shark Bay Airport 35.8 +2.4 45.2 1 Feb 2013 22.3 +1.2 15.4 1 Dec 2012 42.4 51.2 average 83%
East Gascoyne (district 07)
Newman Aero 37.4 -1.0 45.6 8 Jan 2013 23.9 -0.3 18.1 30 Jan 2013 203.8 179.9 average 113%
Paraburdoo Aero 39.4 -0.5 46.4 8 Jan 2013 25.1 0.0 19.8 28 Feb 2013
Murchison (district 07A)
Meekatharra Airport 37.7 +0.6 47.1 8 Jan 2013 24.2 +0.8 15.7 1 Dec 2012 119.6 79.3 high 151%
Mount Magnet Aero 38.1 +1.5 47.4 8 Jan 2013 23.6 +1.2 13.5 1 Dec 2012 77.2 86.6 average 89%
North Coast (district 08)
Dalwallinu 35.1 +0.8 43.9 8 Jan 2013 18.7 +1.4 7.0 1 Dec 2012 81.0 50.7 average 160%
Geraldton Airport 33.9   44.0 9 Feb 2013 19.3   10.1 1 Dec 2012 27.4
Geraldton Airport Comparison 33.9 +2.7 44.1 9 Feb 2013 19.1 +1.2 9.3 1 Dec 2012 9.8 22.3 average 44%
Kalbarri 34.8 +1.9 44.9 1 Feb 2013 20.6 +1.4 10.5 2 Dec 2012
Morawa Airport 37.5 +1.2 45.1 8 Jan 2013 20.6 +1.5 9.2 1 Dec 2012 65.0 59.7 average 109%
Mullewa 37.8 +1.9 44.6 21 Feb 2013 21.4 +2.6 11.3 1 Dec 2012 20.6 39.4 average 52%
North Island 29.1 +1.8 36.7 20 Feb 2013                
Wongan Hills 34.9 +1.2 44.7 8 Jan 2013 18.8 +1.5 7.7 1 Dec 2012 91.8 39.6 high 232%
Central Coast (district 09)
Badgingarra Research Stn 34.5 +0.7 42.4 21 Feb 2013 18.2 +1.7 7.1 1 Dec 2012 40.8 34.8 average 117%
Bickley 30.7 +0.9 39.0 12 Feb 2013 16.1 +1.2 8.2 1 Dec 2012 54.8 51.1 average 107%
Champion Lakes 32.0   40.8 31 Dec 2012 19.1   9.6 1 Dec 2012 84.6
Garden Island HSF 28.2 +1.2 38.7 21 Feb 2013 19.5 +1.1 13.2 1 Dec 2012 57.4 33.1 high 173%
Gingin Aero 33.3 +1.1 41.9 21 Feb 2013 17.2 +1.3 7.8 1 Dec 2012 72.2 36.3 high 199%
Jandakot Aero 32.1 +1.5 41.3 12 Feb 2013 17.5 +1.4 6.6 8 Dec 2012 36.8 43.1 average 85%
Jurien Bay 32.2 +2.6 44.0 10 Feb 2013 18.1 +1.2 9.0 8 Dec 2012 32.4 29.0 average 112%
Karnet 30.4 +0.6 39.0 12 Feb 2013 16.1 +1.3 5.2 1 Dec 2012 54.5 55.3 average 99%
Lancelin 31.1 +2.3 42.0 10 Feb 2013 18.2 +0.9 11.0 18 Jan 2013 52.4 29.7 high 176%
Medina Research Centre 32.2 +2.1 41.7 12 Feb 2013         72.1 43.9 high 164%
Pearce RAAF 34.2 +1.9 43.2 21 Feb 2013 17.7 +1.4 6.7 1 Dec 2012 52.4 28.2 high 186%
Perth Airport 32.8 +2.0 42.2 31 Dec 2012 18.0 +1.6 6.2 1 Dec 2012 34.0 35.6 average 96%
Perth Metro 32.3 +1.9 42.1 31 Dec 2012 18.8 +1.2 9.4 8 Dec 2012 28.2 35.7 average 79%
Rottnest Island 27.9 +1.7 38.5 21 Feb 2013 19.8 +1.1 14.4 1 Dec 2012 37.2 29.2 average 127%
Swanbourne 31.5 +2.2 40.9 20 Feb 2013 18.9 +1.2 11.4 8 Dec 2012
South Coast (district 09A)
Albany 23.5 +1.0 38.1 6 Jan 2013 17.0 +2.2 10.2 2 Dec 2012 95.8 76.8 high 125%
Albany Airport 25.8   40.6 1 Jan 2013 14.5   6.5 29 Jan 2013 92.6
Albany Airport Comparison 25.6 +1.4 40.3 1 Jan 2013 14.5 +1.0 6.4 29 Jan 2013 61.4 74.0 average 83%
Bridgetown 30.1 +1.2 40.3 31 Dec 2012 13.7 +1.2 4.9 25 Jan 2013 76.0 47.9 high 159%
Bunbury 29.6 +0.6 39.2 30 Dec 2012 16.1 +1.2 5.4 1 Dec 2012 123.6 40.1 v high 308%
Busselton Aero 30.4 +1.1 41.0 30 Dec 2012 14.6 +0.8 4.9 1 Dec 2012 32.6 25.9 average 126%
Cape Leeuwin 24.6 +1.9 35.2 21 Feb 2013 18.3 +1.6 13.7 1 Dec 2012 16.2 53.2 v low 30%
Cape Naturaliste 27.5 +2.6 37.7 30 Dec 2012 16.6 +1.7 11.1 2 Dec 2012 59.2 35.7 high 166%
Collie East 30.6 +0.8 39.6 12 Feb 2013 13.8 +0.8 4.5 1 Dec 2012 173.4 50.4 v high 344%
Dwellingup 30.6 +1.8 39.5 31 Dec 2012 15.2 +1.4 4.3 1 Dec 2012 75.4 58.1 high 130%
Esperance 26.9 +1.3 45.4 1 Jan 2013 16.2 +0.8 8.8 2 Dec 2012 50.2 70.6 average 71%
Esperance Aero 29.3 +2.5 45.5 1 Jan 2013 15.2 +0.6 8.3 2 Dec 2012 65.6 72.7 average 90%
Harvey 31.2 +1.0 40.0 12 Feb 2013         91.9 43.4 v high 212%
Jarrahwood 30.8 +2.1 40.6 12 Feb 2013 13.7 +1.2 4.0 1 Dec 2012 67.2 44.8 high 150%
Mandurah 29.9 +1.4 39.2 31 Dec 2012 19.6 +1.2 12.7 1 Dec 2012 88.8 47.7 high 186%
Manjimup 28.9 +2.6 41.1 8 Jan 2013 14.1 +1.4 7.8 8 Dec 2012 70.8 63.8 average 111%
North Walpole 25.5   39.3 8 Jan 2013 15.0   9.1 9 Dec 2012 89.8
Pemberton 27.8 +2.3 40.1 8 Jan 2013 14.3 +1.4 7.1 1 Dec 2012 65.8 75.7 average 87%
Rocky Gully 29.2 +2.6 41.2 8 Jan 2013 13.1 +0.8 5.7 29 Jan 2013 45.8 66.6 average 69%
Windy Harbour 24.5 +1.6 35.4 8 Jan 2013 15.6 +1.6 7.8 29 Jan 2013 55.4 59.3 average 93%
Witchcliffe 28.4 +2.4 40.6 30 Dec 2012 14.5 +0.9 7.6 2 Dec 2012 54.2 36.1 high 150%
North Central (district 10)
Bencubbin 34.6 +1.1 44.2 8 Jan 2013 19.0 +1.7 9.4 1 Dec 2012 78.5 50.3 high 156%
Cunderdin Airfield 35.0 +1.2 44.0 8 Jan 2013 17.9 +1.5 6.3 1 Dec 2012 60.8 44.7 high 136%
Kellerberrin 34.3 +1.2 44.8 8 Jan 2013     6.3 1 Dec 2012 139.3 41.2 v high 338%
Merredin 34.7 +1.7 43.9 8 Jan 2013 18.4 +1.2 8.5 1 Dec 2012 95.0 44.5 high 213%
Northam 34.8 +1.5 43.3 8 Jan 2013 17.8 +1.2 6.3 1 Dec 2012 47.5 33.4 high 142%
York 34.6 +1.4 43.6 8 Jan 2013 16.7 +1.0 5.0 1 Dec 2012 34.1 53.8 average 63%
South Central (district 10A)
Beverley 35.0 +1.7 43.0 8 Jan 2013 17.1 +1.3 5.6 1 Dec 2012 29.6 35.6 average 83%
Brookton 33.6 +1.6 42.7 8 Jan 2013 16.6 +1.7 4.1 1 Dec 2012 26.7 37.5 average 71%
Corrigin 33.2 +1.7 42.1 8 Jan 2013 17.0 +1.8 5.0 1 Dec 2012 98.2 46.6 high 211%
Hyden 34.0 +1.2 44.5 1 Jan 2013 16.7 +1.6 6.5 1 Dec 2012 61.7 54.2 average 114%
Jacup 29.8 +3.0 45.4 1 Jan 2013 13.4 +0.7 4.8 1 Dec 2012 65.0 82.6 average 79%
Katanning 31.3 +2.1 42.5 15 Jan 2013 14.2 +1.1 6.0 1 Dec 2012 115.8 64.6 high 179%
Lake Grace 32.0 +1.8 43.1 1 Jan 2013 16.0 +1.3 6.8 1 Dec 2012 59.8 74.7 average 80%
Narembeen 34.5 +1.5 43.1 8 Jan 2013         63.9 47.3 high 135%
Narrogin 31.8 +1.8 41.7 8 Jan 2013 15.7 +2.1 4.9 1 Dec 2012 53.6 43.2 high 124%
Newdegate Research Station 32.1 +2.0 44.2 1 Jan 2013 14.6 +1.4 4.2 1 Dec 2012 38.2 55.7 average 69%
Ongerup 30.1 +2.2 43.0 1 Jan 2013 14.7 +1.1 5.8 1 Dec 2012 56.7 54.5 average 104%
Pingelly 32.8 +1.8 42.2 8 Jan 2013 16.4 +1.3 6.9 8 Dec 2012 24.6 37.3 average 66%
Ravensthorpe 29.7 +1.6 43.8 1 Jan 2013 15.0 +1.2 6.9 1 Dec 2012 53.2 73.4 average 72%
Wagin 31.8 +1.6 41.6 15 Jan 2013 15.6 +1.5 6.4 1 Dec 2012 96.4 41.5 high 232%
Wandering 32.6 +1.4 41.6 8 Jan 2013 14.5 +0.9 3.8 1 Dec 2012 41.2 46.5 average 89%
Eucla (district 11)
Balladonia 32.3 +1.6 46.8 2 Jan 2013 15.3 +1.1 9.5 1 Dec 2012 33.0 57.1 average 58%
Eucla 27.9 +2.4 48.2 3 Jan 2013 17.1 +0.9 8.0 2 Dec 2012 59.6 52.1 high 114%
Eyre 28.4 +2.3 47.7 2 Jan 2013 14.4 -0.8 3.8 30 Jan 2013 71.4 53.0 high 135%
Forrest 34.0 +1.9 47.9 3 Jan 2013 16.2 +0.3 10.2 2 Feb 2013 23.4 78.9 low 30%
Red Rocks Point 26.1   48.6 3 Jan 2013 18.0   9.0 2 Dec 2012 62.6
South East (district 12)
Bulga Downs 37.9 +1.2 47.9 8 Jan 2013 22.2 +0.8 13.0 1 Dec 2012 55.0 71.8 average 77%
Kalgoorlie-Boulder Airport 33.7 +1.2 46.1 9 Jan 2013 19.1 +1.5 10.9 1 Dec 2012 79.0 71.7 average 110%
Laverton Aero 36.3 +2.2 47.6 8 Jan 2013 22.3 +1.8 15.3 1 Dec 2012 89.8 134.6 average 67%
Leinster Aero 37.2 +1.4 47.8 8 Jan 2013 23.4 +1.3 15.5 1 Dec 2012 70.6 105.6 average 67%
Leonora         22.3 +1.4 14.8 1 Dec 2012 54.6 72.6 average 75%
Leonora Aero 36.8   48.3 8 Jan 2013 22.6   15.3 1 Dec 2012 53.6
Munglinup West 30.4 +2.3 46.1 1 Jan 2013 14.7 +0.6 7.1 1 Dec 2012 37.8 99.2 low 38%
Norseman Aero 33.1 +1.6 43.9 8 Jan 2013 15.9 +0.7 5.9 1 Dec 2012 56.0 92.0 low 61%
Salmon Gums Res.Stn. 31.6 +1.9 44.1 1 Jan 2013 14.3 +0.9 5.1 2 Dec 2012 21.4 70.1 low 31%
Southern Cross Airfield 34.8 +1.2 45.3 9 Jan 2013 18.4 +1.6 9.7 1 Dec 2012 56.8 71.4 average 80%
North East (district 13)
Carnegie 38.4 +0.8 47.7 8 Jan 2013 23.8 +1.0 15.4 27 Feb 2013 72.6 110.0 average 66%
Giles Meteorological Office 37.6 +1.3 45.7 16 Jan 2013 23.8 +1.1 16.5 2 Feb 2013 57.6 120.7 low 48%
Telfer Aero 39.7 -0.1 46.8 7 Jan 2013 26.4 +0.8 19.8 27 Feb 2013 373.2 201.6 v high 185%
Warburton Airfield 38.6 +1.7 47.7 10 Jan 2013 24.4 +2.4 17.4 1 Feb 2013 54.8 98.4 average 56%
Wiluna 38.2 +1.1 48.0 8 Jan 2013     15.0 1 Dec 2012 58.5 95.5 average 61%
Offshore Islands (district 200)
Varanus Island 33.9 +2.0 38.2 8 Jan 2013 27.5 +1.7 23.6 16 Feb 2013 49.4 109.0 average 45%

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 2 pm on Friday 1 March 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

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