Western Australia in autumn 2015: Cooler days and wet in the northwest

  • three tropical cyclones in WA region
  • coolest autumn day-time temperatures for 4 years for WA; 18 years for southwest WA
  • coolest autumn night-time temperature for 3 years for WA; 6 years for southwest WA

Autumn 2015 saw above to very much above average rainfall in the Pilbara, Gascoyne, western parts of the Northern Interior and Southern Interior, and northern Goldfields, with several sites in the Pilbara, Gascoyne, and Goldfields recording their wettest autumn on record, and a number of other sites observed their wettest autumn for at least 20 years. Below average rainfall in autumn was mostly confined to eastern parts of WA, with a few sites recording their driest autumn in at least 20 years. When averaged across the State, rainfall in autumn 2015 rainfall was above average. For the South West Land Division (SWLD), autumn 2015 rainfall was near average.

Three tropical cyclones were observed in the WA region in autumn 2015, severe tropical cyclone Olwyn (mid-March), severe tropical cyclone Ikola (early April), and severe tropical cyclone Quang (late April and early May), with Olwyn and Quang impacting the WA northern west coast, and Olwyn causing minor to moderate damage in west Pilbara and west Gascoyne communities.

Mean maximum temperatures were below to very much below average over much of WA, mainly through the northwest, central, and southeast. Emu Creek Station and Learmonth in the west Pilbara both recorded their coolest autumn on record, in terms of day-time temperatures. Large parts of the Kimberley recorded above to very much above average mean maximum temperatures in autumn 2015. Averaged across the State, the mean maximum temperature for autumn 2015 was the 11th coolest autumn on record since comparable records commenced in 1910, and the coolest autumn for four years, since 2011. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) was near average, though it is the coolest autumn in 18 years, since 1997.

Mean minimum temperatures were near average for most of WA in autumn, though areas of above average minima were recorded near the Pilbara coast, in the northern Central West and southwest Gascoyne, and in the Southern Interior and eastern Eucla. Areas with cooler than normal nights were reported in the Kimberley, and small parts of the Gascoyne, Goldfields, and western Eucla. Eyre in the Eucla recorded a mean minimum temperature of 9.8 °C in autumn 2015, which is its coolest autumn nights in 53 years of record. Averaged across the State, the mean minimum temperature for autumn was close to the long-term average, but the lowest for three years, since 2012, whilst the mean minimum for autumn in the Lower Southwest was also near average, but the lowest for six years, since 2009.

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Extremes in autumn 2015
Hottest day 44.3 °C at Roebourne Aero on 22 Mar
Warmest days on average 37.0 °C at Wyndham Aero
Coolest days on average 20.3 °C at Shannon
Coldest day 11.6 °C at Mount Barker on 4 May
Coldest night -2.5 °C at Eyre on 14 May
Coolest nights on average 8.2 °C at Wandering
Warmest nights on average 27.4 °C at Browse Island
23.5 °C at Truscott
Warmest night 29.8 °C at Argyle Aerodrome on 15 Mar
29.8 °C at Wittenoom on 21 Mar
Warmest on average overall 29.7 °C at Wyndham Aero
Coolest on average overall 15.3 °C at Shannon
Wettest overall 382.4 mm at Glen Florrie Station
Driest overall 2.2 mm at Ba;go Hills
Wettest day 128.8 mm at Shark Bay Airport on 14 Mar
Strongest wind gust 180 km/h at Learmonth Airport on 13 Mar

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 autumn daily rainfall
New record
(mm)
Old
record
Years of
record
Tamaru 99.6 on 10 Apr 86.7 on 1 Apr 2005 50
Banjawarn 75.0 on 1 Mar 72.0 on 31 Mar 1983 35
Gibb Rock 51.2 on 31 Mar 43.8 on 11 Apr 1999 34
Edmund 96.2 on 30 Mar 85.2 on 30 Mar 2008 30
Mount Barker North 100.6 on 10 Apr 96.0 on 17 Apr 2002 30
Mingah Springs 121.2 on 4 Mar 106.6 on 25 Mar 1999 24



Record highest autumn total rainfall
New record
(mm)
Old
record
Years of
record
Average for
autumn
Kooline 319.3 296.4 in 1942 92 83.2
Turee Creek 291.2 290.9 in 1931 89 77.3
Yakabindie 265.8 222.0 in 1942 77 75.9
Wandana 240.8 235.6 in 1992 54 92.3
Tangadee 293.4 264.4 in 1965 50 80.4
Newman Aero 366.4 275.7 in 1979 40 80.8
Paraburdoo Aero 327.8 304.2 in 1992 40 95.5
Weelarrana 302.8 271.6 in 2000 27 97.4
Mingah Springs 316.8 241.6 in 1999 24 98.6
Weedarrah 255.2 246.4 in 1999 24 72.1

Highest autumn total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
autumn
Mount Stuart 322.7 365.5 in 1900* 86 107.2
Mount Vernon 280.0 300.0 in 1984* 30 73.0
Mullewa 230.2 238.5 in 1984* 29 85.8
Bencubbin 142.8 152.6 in 1988* 26 82.9
Bulloo Downs 254.0 262.4 in 1992 23 76.0
Mininer 266.2 283.2 in 1992 23 75.9
Challa 170.8 363.4 in 1992* 22 64.9
Neds Creek 189.8 241.2 in 1992* 22 74.3
Wiluna 212.5 257.5 in 1992* 22 90.9

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




Lowest autumn total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Years since
lower
Average for
autumn
Balgo Hills 2.2 1.3 in 1963* 45 77.4
Argyle Aerodrome 20.8 15.8 in 1991* 23 187.0
Eyre 45.6 45.0 in 1994 21 91.2

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




Record highest autumn temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Cocos Island Airport 32.8 on 7 Apr = 32.8 on 11 Apr 1998 64 29.7
Jacup 40.4 on 13 Mar 40.1 on 8 Mar 2007 22 22.9
Mount Elizabeth 37.1 on 22 Mar 37.0 on 22 Mar 2013 22 31.7
Argyle Aerodrome 42.1 on 22 Mar 41.5 on 19 Mar 1998 21 34.0



Record lowest autumn daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Paraburdoo Aero 18.4 on 21 Apr 18.6 on 17 Mar 2012 20 33.1



Record lowest autumn mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Emu Creek Station 31.3 31.6 in 2000 42 34.4
Learmonth Airport 29.7 30.1 in 2000 40 32.7

Lowest autumn mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Mardie 32.4 32.2 in 1968* 46 35.0
Onslow Airport 30.9 30.3 in 1968* 24 33.0
Wongan Hills 25.3 25.0 in 1992 23 26.3
Cape Naturaliste 22.4 21.3 in 1993 22 21.9
Karnet 22.8 22.7 in 1993 22 23.5
Pemberton 21.3 20.4 in 1993 22 21.3
Wagin 22.8 22.1 in 1993 22 23.7
Badgingarra Research Stn 25.7 25.5 in 1992* 20 27.3
Leinster Aero 24.5 23.4 in 1995 20 27.5
Mullewa 27.0 26.9 in 1992* 20 28.7

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




Record highest autumn daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Carnamah 29.0 on 13 Mar 28.0 on 8 Mar 2003 73 14.1
Narembeen 26.6 on 14 Mar 24.4 on 4 Mar 1971 48 11.7
Esperance 25.8 on 14 Mar 25.4 on 2 Mar 1998 46 13.2
Hyden 25.2 on 14 Mar 24.5 on 20 Mar 1994 43 11.0
Eneabba 29.1 on 13 Mar 29.0 on 5 Mar 1990 42 15.3
Paynes Find 29.3 on 13 Mar 28.8 on 2 Mar 1998 36 14.0
Mount Magnet Aero 28.1 on 13 Mar 27.8 on 13 Mar 2005 20 16.1



Record lowest autumn temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Broome Airport 7.7 on 16 May = 7.7 on 28 May 2012 76 22.1
Eyre -2.5 on 14 May -2.4 on 28 May 2011 28 11.8
Jacup 1.2 on 29 May 1.7 on 8 Apr 2001 22 10.7
Rocky Gully 1.2 on 29 May 1.6 on 25 May 2004 20 10.9



Record lowest autumn mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Eyre 9.8 10.1 in 2012 53 11.8

Lowest autumn mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Esperance 12.5 12.2 in 1995 20 13.2
Eucla 12.6 12.3 in 1995 20 13.3



Lowest autumn mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Cape Naturaliste 17.9 17.3 in 1993 22 17.9
Badgingarra Research Stn 19.6 19.4 in 1992* 20 20.4
Eucla 17.7 16.7 in 1995 20 18.3

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




Summary statistics for autumn 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
autumn
2015
Diff
from
average
Highest for
autumn
2015
Mean for
autumn
2015
Diff
from
average
Lowest for
autumn
2015
Total for
autumn
2015
Average
for
autumn
Rank of
autumn
2015
Fraction of
autumn
average
North Kimberley (district 01)
Doongan 33.1 +0.6 37.0 22 Mar 17.7 -0.8 5.2 16 May 266.0 284.6 average 93%
Kalumburu 34.6 +0.7 38.3 14 Mar 19.8 -0.7 8.0 16 May 229.6 264.0 average 87%
Mount Elizabeth 32.5 +0.8 37.1 22 Mar 16.3 -0.2 2.1 16 May 309.4 218.0 high 142%
Truscott 33.2 +0.7 36.3 20 Mar 23.0 -0.5 15.0 17 May 121.6 310.7 low 39%
Wyndham Aero 37.0 +1.6 42.3 15 Mar 22.4 -0.3 10.8 17 May 71.8 185.6 low 39%
East Kimberley (district 02)
Argyle Aerodrome 35.9 +1.9 42.1 22 Mar 22.8 +0.7 12.1 16 May 20.8 187.0 v low 11%
Halls Creek Airport 33.4 +0.4 39.3 23 Mar 19.6 -0.4 10.3 17 May 120.0 116.2 average 103%
Kununurra Aero 36.1 +1.6 42.3 21 Mar 20.9 -0.7 9.2 17 May 26.2 188.1 v low 14%
Warmun 36.1 +1.7 41.5 23 Mar 19.7 -0.7 7.8 17 May 64.4 152.5 low 42%
West Kimberley (district 03)
Bidyadanga 34.5 0.0 41.0 4 Apr 22.2 +0.4 12.5 17 May 93.6 146.7 average 64%
Broome Airport 33.4 +0.1 39.0 26 Mar 22.4 +0.3 7.7 16 May 78.2 153.0 average 51%
Curtin Aero 35.3 +0.1 40.2 23 Mar 21.6 -0.2 13.2 18 May 61.2 226.8 low 27%
Cygnet Bay 32.2 -0.5 36.6 21 Mar     11.9 17 May 267.7 252.8 average 106%
Derby Aero 35.6 +1.1 40.2 23 Mar 22.0 -0.2 11.8 17 May 61.2 177.5 low 34%
Fitzroy Crossing Aero 36.3 +0.8 41.6 23 Mar 20.2 0.0 7.4 16 May 73.8 160.4 low 46%
De Grey (district 04)
Bedout Island 30.1   35.2 2 Apr 25.1   17.9 25 May
Karratha Aero 31.4 -2.1 40.8 22 Mar 22.6 +0.4 12.3 17 May 170.2 96.6 high 176%
Legendre Island 29.8   36.4 22 Mar 24.1   16.9 22 Apr
Mandora 34.1 -0.9 42.1 23 Mar 21.2 +0.7 7.3 18 May 100.8 118.1 average 85%
Marble Bar 32.9 -2.1 42.7 21 Mar 21.2 -0.1 7.5 16 May 238.0 114.5 high 208%
Pardoo Station 33.6 -0.9 41.0 23 Mar     14.0 21 Apr 153.3 103.0 high 149%
Port Hedland Airport 33.2 -1.0 41.7 21 Mar 22.5 +1.4 10.7 17 May 164.2 99.9 high 164%
Roebourne Aero 32.9 -2.2 44.3 22 Mar 21.6 +0.4 9.2 16 May 196.6 82.8 high 237%
Fortescue (district 05)
Barrow Island Airport 28.8 -1.8 35.7 9 Mar 23.8 -0.3 18.3 17 May 374.2 167.4 high 224%
Learmonth Airport 29.7 -3.0 37.5 9 Mar 19.3 -0.5 10.9 12 May 325.4 106.2 v high 306%
Mardie 32.4 -2.6 41.4 21 Mar 21.9 +1.1 10.0 16 May 206.0 106.4 high 194%
Onslow Airport 30.9 -2.1 39.0 23 Mar 21.4 +0.5 14.3 12 May 358.4 137.2 v high 261%
Wittenoom 29.8 -2.7 39.4 21 Mar 20.2 -0.3 8.6 16 May 345.0 126.8 v high 272%
West Gascoyne (district 06)
Carnarvon Airport 29.4 +0.4 39.7 11 Mar 18.8 +0.1 9.7 12 May 118.2 65.3 high 181%
Denham 28.5 0.0 39.1 11 Mar 19.4 0.0 10.8 6 May 153.0 66.0 v high 232%
Emu Creek Station 31.3 -3.1 39.5 23 Mar 19.3 -0.9 11.6 16 May 239.5 98.8 v high 242%
Murchison 27.9 -2.8 37.0 12 Mar 16.0 +0.1 5.5 31 May 91.1 73.7 high 124%
Shark Bay Airport 29.4 -1.5 39.4 11 Mar 18.3 +0.3 9.7 6 May 192.8 59.9 high 322%
East Gascoyne (district 07)
Newman Aero 28.4 -2.9 39.6 20 Mar 17.4 +0.5 4.9 16 May 366.4 80.8 highest 453%
Paraburdoo Aero 30.0 -3.1 39.3 17 Mar 18.5 -0.7 8.5 16 May 327.8 95.5 highest 343%
Murchison (district 07A)
Meekatharra Airport 26.1 -3.0 36.7 20 Mar 15.8 -1.0 6.7 6 May 111.0 72.1 high 154%
Mount Magnet Aero 25.7 -3.0 38.3 12 Mar 14.9 -1.2 5.5 5 May 131.8 76.4 high 173%
Paynes Find 26.4 -1.8 39.2 12 Mar 13.6 -0.4 2.4 5 May 94.4 88.8 average 106%
North Coast (district 08)
Carnamah 26.7 -1.0 39.5 12 Mar 14.6 +0.5 5.1 28 May 105.9 93.9 average 113%
Dalwallinu 25.2 -1.8 38.5 12 Mar 12.8 -0.4 3.6 5 May 114.8 73.3 high 157%
Geraldton Airport 27.7   38.9 12 Mar 15.5   7.3 8 May 140.4
Kalbarri 28.7 -0.7 39.6 12 Mar 17.1 +0.9 9.5 29 May 139.2 90.5 high 154%
Morawa Airport 26.8 -2.0 39.3 12 Mar 14.4 +0.1 5.0 31 May 108.2 73.1 average 148%
Mullewa 27.0 -1.7 39.4 12 Mar 15.5 +0.6 6.8 5 May 230.2 85.8 v high 268%
North Island 26.0 -0.3 30.1 6 Apr 20.3 0.0 15.5 15 May 128.0 74.0 high 173%
Wongan Hills 25.3 -1.0 38.5 12 Mar 12.6 -0.6 3.5 28 May 74.2 94.6 average 78%
Central Coast (district 09)
Badgingarra Research Stn 25.7 -1.6 39.0 12 Mar 13.6 +0.1 5.6 28 May 111.4 114.0 average 98%
Bickley 22.5 -1.2 36.5 12 Mar 11.7 -0.8 5.3 20 May 241.4 211.7 average 114%
Garden Island HSF 23.5 -0.7 33.7 13 Mar 15.5 -0.6 9.8 23 May 131.6 134.6 average 98%
Gingin Aero 25.7 -1.0 39.6 12 Mar 11.7 -0.5 0.3 28 May 140.2 120.6 average 116%
Jandakot Aero 25.3 -0.5 36.4 12 Mar 11.9 -0.5 1.5 28 May 146.4 166.2 average 88%
Jurien Bay     36.5 13 Mar     4.5 29 May 89.7 120.9 average 74%
Karnet 22.8 -0.7 36.2 12 Mar     3.2 5 May 216.3 232.9 average 93%
Lancelin 26.6 +1.0 36.5 12 Mar     6.0 30 May 146.8 129.1 high 114%
Medina Research Centre 25.3 -0.4 35.2 13 Mar 13.0 -0.3 4.3 5 May 130.7 160.1 low 82%
Pearce RAAF 26.3 0.0 41.5 12 Mar 12.9 -0.5 1.7 5 May 139.8 134.8 average 104%
Perth Airport 25.7 0.0 38.6 12 Mar 12.8 -0.3 3.0 5 May 145.2 156.2 average 93%
Perth Metro 25.4 -0.6 37.9 12 Mar 13.1 -0.6 3.7 28 May 153.4 180.5 average 85%
Rottnest Island 23.1 -0.6 31.1 13 Mar 16.5 -0.6 10.0 4 May 141.6 148.1 average 96%
Swanbourne 25.6 0.0 37.2 12 Mar 14.3 -0.8 7.1 28 May 184.0 153.0 average 120%
South Coast (district 09A)
Albany 20.7 +0.1 37.5 13 Mar 13.4 +0.7 6.0 31 May 170.6 223.5 low 76%
Albany Airport 21.2   40.1 13 Mar 11.0   2.6 29 May 218.4
Bridgetown 22.2 -1.4 39.2 13 Mar 8.9 -0.4 0.1 30 May 191.4 170.3 average 112%
Bunbury 23.7 -0.7 36.2 13 Mar 11.2 -0.6 2.7 31 May 178.4 152.8 high 117%
Busselton Aero 23.1 -1.2 36.0 13 Mar 10.3 -0.9 1.9 31 May 204.0 158.3 high 129%
Cape Leeuwin 21.1 0.0 26.9 19 Apr 15.3 0.0 9.5 29 May 244.2 226.4 average 108%
Cape Naturaliste 22.4 +0.5 32.4 13 Mar 13.5 -0.4 6.8 20 May 240.8 181.9 high 132%
Collie East 23.2 -0.9 37.3 12 Mar 8.5 -0.5 -1.0 30 May 136.6 153.2 average 89%
Donnybrook 24.0 0.0 38.9 13 Mar     3.5 3 May 215.2 207.9 average 104%
Dwellingup 22.8 +0.1 36.3 12 Mar 10.3 0.0 2.7 5 May 208.0 250.3 low 83%
Esperance 22.1 -0.9 41.5 13 Mar 12.5 -0.7 5.7 21 May 152.4 147.4 average 103%
Esperance Aero 22.7 -0.5 41.1 13 Mar 11.8 -0.8 5.2 29 May 166.0 142.4 average 117%
Hopetoun North 21.4 -1.9 42.0 13 Mar 11.1 -1.5 2.5 13 May 117.8 114.6 average 103%
Jarrahwood 23.5 -0.4 37.0 12 Mar 8.5 -0.6 -1.6 30 May 248.2 194.6 high 128%
Mandurah 24.2 -0.2 34.4 5 Mar 14.9 -1.0 8.6 5 May
Manjimup 21.3 +0.1 38.7 13 Mar 10.5 -0.2 3.1 30 May 235.6 220.3 average 107%
North Walpole 20.8 -0.8 29.3 12 Mar 12.4 -0.5 6.0 31 May 254.0 247.4 average 103%
Pemberton 21.3 0.0 34.5 13 Mar     2.0 2 May 273.3 262.8 average 104%
Rocky Gully 20.7 -1.3 38.8 13 Mar 10.0 -0.9 1.2 29 May 199.8 163.2 high 122%
Shannon 20.3 -1.4 38.3 13 Mar 10.3 -0.5 2.2 29 May 258.4 228.9 average 113%
Witchcliffe 21.5 -1.3 33.2 12 Mar 11.0 -0.3 1.7 29 May 294.4 228.9 high 129%
North Central (district 10)
Bencubbin 24.2 -1.7 38.1 12 Mar 12.5 -0.2 4.8 28 May 142.8 82.9 v high 172%
Cunderdin Airfield 25.7 -0.8 39.6 12 Mar 11.3 -0.7 0.9 28 May 65.6 72.6 average 90%
Kellerberrin     39.5 12 Mar 11.0 -0.7 1.0 28 May 61.8 83.6 average 74%
Merredin 24.7 -0.8 37.4 12 Mar 12.5 -0.2 1.9 28 May 116.2 84.4 high 138%
Northam 25.4 -0.7 39.4 12 Mar 11.6 -0.3 0.6 28 May 81.2 97.0 average 84%
York 25.2 -1.2 39.3 12 Mar     -0.8 28 May 94.3 83.6 average 113%
South Central (district 10A)
Beverley 25.5 -0.7 39.8 12 Mar 10.6 -0.7 1.6 28 May 78.0 93.0 average 84%
Brookton 24.2 -0.8 38.2 12 Mar 10.9 -0.2 1.7 31 May 94.5 100.7 average 94%
Corrigin 24.1 -0.2 38.5 12 Mar 10.5 -0.5 0.5 30 May 75.1 91.1 average 82%
Hyden 25.1 -0.5 39.9 13 Mar 10.5 -0.5 -0.5 28 May 83.2 82.3 average 101%
Jacup 22.0 -0.9 40.4 13 Mar 9.7 -1.0 1.2 29 May 127.6 108.6 average 117%
Katanning 22.1 -1.3 37.6 12 Mar 10.1 -0.9 1.7 29 May
Lake Grace 23.0 -1.2 38.3 12 Mar 11.1 -0.7 0.7 30 May 109.2 75.7 high 144%
Narembeen 25.3 -0.4 38.9 12 Mar     0.6 28 May 56.3 81.6 average 69%
Narrogin 22.9 -0.1 37.6 12 Mar 10.2 -0.3 0.4 30 May 111.4 113.0 average 99%
Newdegate Research Station 23.2 -1.0 39.0 13 Mar 9.1 -1.0 -0.7 30 May 91.6 92.2 average 99%
Ongerup 22.0 -0.6 39.4 13 Mar 10.2 -0.8 0.4 29 May 78.6 92.1 average 85%
Pingelly 23.6 -0.5 38.0 12 Mar 11.0 -0.8 2.4 5 May 91.2 102.0 average 89%
Ravensthorpe 22.5 -1.0 40.0 13 Mar 11.2 -0.5 3.5 29 May 158.5 109.1 high 145%
Wagin 22.8 -0.9 38.1 12 Mar 10.3 -0.4 0.7 30 May 96.5 103.4 average 93%
Wandering 23.3 -1.3 38.7 12 Mar 8.2 -1.3 -1.4 30 May 134.0 103.2 average 130%
Eucla (district 11)
Balladonia 23.8 -0.9 37.6 14 Mar 10.1 -0.8 0.5 30 May 69.1 74.7 average 93%
Eucla 22.7 -0.7 43.2 15 Mar 12.6 -0.7 4.8 21 May 88.4 80.8 average 109%
Eyre 24.3 +0.6 39.3 14 Mar 9.8 -2.0 -2.5 14 May 45.6 91.2 low 50%
Forrest 24.0 -2.0 41.1 15 Mar 11.5 -0.3 1.9 16 May 24.2 61.5 v low 39%
Red Rocks Point 22.6 -0.6 39.2 18 Mar 13.6 -0.7 6.4 9 May 45.4 86.5 low 52%
South East (district 12)
Bulga Downs 25.6 -3.0 38.1 12 Mar 13.1 -0.9 2.5 5 May 98.8 71.3 high 139%
Kalgoorlie-Boulder Airport 23.8 -1.3 39.6 21 Mar 12.3 -0.2 2.5 31 May 74.4 72.6 average 102%
Laverton Aero 24.3 -2.2 39.4 21 Mar 13.6 -1.0 4.1 31 May 119.2 73.7 v high 162%
Leinster Aero 24.5 -3.0 38.3 21 Mar 13.8 -1.2 2.9 5 May
Leonora Aero 24.8   38.8 21 Mar 13.7   2.8 15 May 87.8
Munglinup West 23.1 -0.9 41.3 13 Mar 10.9 -1.1 4.7 29 May 117.0 105.3 average 111%
Norseman Aero 23.9 -1.1 39.8 21 Mar 10.0 -0.8 -1.8 31 May 57.0 77.3 average 74%
Salmon Gums Res.Stn. 22.9 -0.8 39.2 13 Mar 8.9 -1.0 -1.8 30 May 89.0 87.4 average 102%
Southern Cross Airfield 24.5 -1.6 37.3 12 Mar 11.6 +0.1 0.5 31 May 106.4 89.0 average 120%
Yeelirrie 25.2 -3.4 38.3 21 Mar 12.9 -0.6 -0.5 15 May 157.9 82.0 high 193%
North East (district 13)
Carnegie 27.4 -2.4 40.8 21 Mar 15.8 +0.2 3.8 15 May 148.0 72.8 high 203%
Giles Meteorological Office 28.4 -0.5 40.9 18 Mar 15.7 -0.4 4.6 15 May 71.8 73.9 average 97%
Telfer Aero 32.4 -1.2 42.0 21 Mar 20.1 +0.1 6.1 16 May 89.2 112.9 average 79%
Warburton Airfield 27.8 -1.4 40.9 15 Mar 16.0 +0.8 6.5 15 May 52.6 65.5 average 80%
Offshore Islands (district 200)
Adele Island 30.7   35.6 21 Mar 26.4   22.1 17 May
Browse Island 30.4   32.1 17 Apr 27.4   22.5 23 Mar
Christmas Island Aero 28.6 +0.5 30.6 12 Apr 23.6 +0.2 20.4 26 May 906.8 704.3 high 129%
Cocos Island Airport 30.4 +0.7 32.8 7 Apr 25.7 +0.5 23.5 25 Apr 548.6 679.4 average 81%

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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 11 am on Tuesday 2 June 2015. 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.

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.

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