Western Australia in 2015: second-warmest year on record; dry in southwest

2015 was the second-warmest year on record for Western Australia. Rainfall for the year was near average when averaged across WA, however, rainfall was below average for the South West Land Division (SWLD).

  • Second-warmest year on record for WA, warmest for SWLD
  • Mean maximum temperature second-highest for WA, highest for SWLD
  • Mean minimum temperature third-highest for WA; third-highest for SWLD
  • Rainfall near average for WA; below average for SWLD and eighth-driest for the Lower Southwest
  • Three tropical cyclones (Olwyn, Ikola, Quang) and two tropical lows, with Olwyn and Quang crossing the northwest coast
  • Spring: warmest spring on record for WA & SWLD

Western Australia's annual mean temperature in 2015 was 0.96 °C above-average, ranking as the second-highest, since comparable temperature records commenced in 1910, closely following the warmest year in 2013. For the South West Land Division (SWLD) as a whole, the annual mean temperature in 2015 was 1.22 °C above average, which was the highest on record.

Western Australia's annual mean maximum temperature in 2015 was 1.12 °C above-average, ranking as the second-highest since comparable temperature records commenced in 1910, closely following the warmest year in 2014. Aside from cooler than normal autumn months, the remaining nine months in 2015 saw warmer than normal day-time temperatures, and five months were ranked in their respective top ten: February (2nd-highest); June (highest); September (8th-highest); October (highest); and November (4th-highest). Consequently, the seasonal mean maximum temperature for winter was the second-highest on record, while it was the warmest spring on record.

For the South West Land Division (SWLD) as a whole, the annual mean maximum temperature in 2015 was 1.55 °C above average, which was the highest on record. The SWLD followed a similar pattern to WA, in that only the autumn months saw cooler than normal daytime maxima, and six of the remaining months ranked in the top ten warmest for their respective month: January (4th-highest); February (2nd-highest); June (highest); September (4th-highest); October(highest); and November (4th-highest). The seasonal mean maximum temperature for spring was the highest on record as a result.

Western Australia's annual mean minimum temperature in 2015 was 0.78 °C above average, ranking as the third-highest on record. Apart from cooler than normal nights in April, May and September, mean overnight temperatures for the remaining months were above average. February (2nd-highest), August (9th-highest), October (highest) and November(equal highest) were all ranked in the top ten highest for their respective month. The seasonal mean minimum temperature for spring was the second-highest on record as a result.

For the SWLD, the annual mean minimum temperature in 2015 was 0.89 °C above average, the third-highest on record. Apart from cooler than normal nights in March, most months saw above average overnight temperatures in the SWLD. February (5th-highest), August (9th-highest), October (2nd-highest) and November (highest) all ranked in the top ten warmest for their respective month. Consequently, the seasonal mean minimum temperature for spring was the highest on record.

The annual rainfall in 2015 for WA was 354 mm, which was close to average, but was the lowest annual total since 2010. For the SWLD, rainfall in 2015 was below average, and the lowest since 2012. For the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), rainfall in 2015 was 390 mm, ranking as the eighth-driest year on record, with a number of coastal sites either recording their lowest annual rainfall in more than 100 years of record or lowest since 1987.

Notable events in 2015

Tropical lows and cyclones

  • Two tropical lows moved through the Kimberley region during early to mid-January, resulting in the record high daily rainfall for January at a number of locations. Cape Leveque recorded over 400 mm (rain gauge was overflowed) on the 8th, which was the 2nd-highest daily rainfall in Australia in 2015, and WA's tenth-highest January daily rainfall on record
  • Tropical cyclone Olwyn developed off the northwest coast on 11 March, and tracked southward near the west coast between Exmouth and Shark Bay on the 13th, before weakening rapidly while moving inland. Learmonth Airport recorded a gust of 180 km/h on the 13th, the highest wind gust in WA in 2015
  • An extensive cloudband and the passage of ex-tropical cyclone Ikola brought moderate to heavy daily rainfall in parts of the SWLD on 9-10 April. Mount Barker North (South Coastal) recorded a daily total of 100.6 mm on the 10th, which was the all-time highest daily total at this site
  • Late season tropical cyclone Quang formed well off the northwest coast towards late April, reaching category 4 intensity before weakening to a low as it crossed the coast between Exmouth and Onslow. Ex-tropical cyclone Quang produced moderate to heavy rainfall in the Pilbara on 1-2 May, while a tornado was reported near Karratha, well away from the centre of the low

Thunderstorms

  • 28 January - 3 February: widespread thunderstorms occurred in northern and western WA. A number of locations in the Gascoyne and SWLD reported hail up to 3cm in diameter. Strong winds caused power outages in the Perth metropolitan area on the 29th, and the Geraldton area on the 2nd
  • 25 February - 3 March: thunderstorms were frequent in northern and central WA, as well as eastern and northern SWLD. A number of gusts in excess of 100 km/h were recorded in the Pilbara, and daily rainfall totals between 50 mm and 120 mm were reported in the Gascoyne, Pilbara and Kimberley in early March
  • 16-18 May: a deep cut-off low followed by a cold front produced severe wind gusts along the SWLD coast and widespread moderate to heavy rainfall
  • 30-31 July: a rain band with embedded thunderstorms produced widespread moderate to heavy rainfall over the Gascoyne and SWLD, causing minor to moderate flooding in the Moore River, and minor flooding along the Busselton Coast. A number of sites in the southeast Gascoyne and Central Wheat Belt recorded their all-time highest daily rainfall on record
  • 29 August: a convergence line ahead of a cold front produced a tornado in the Bunbury area. Damage to trees and property was reported in the southern suburbs of Bunbury
  • 17 October: thunderstorms tracked through eastern parts of the SWLD and the Goldfields. Hail up to 3cm in diameter damaged crops at Newdegate and Dunn Rock in the Great Southern district
  • 6-7 November: a complex low with embedded thunderstorms produced record high November daily falls in the SWLD. Spring Valley's daily total of 123.4 mm on the 7th was the 3rd-highest November daily total in the SWLD, and its all-time highest daily rainfall on record

Bushfire

  • A fire started by lightning in the Boddington area late January 2015 and burnt approximately 52,000 ha of forest and farmland over seven days
  • Widespread thunderstorms on the afternoon of 28 January 2015 ignited numerous fires over southwest WA, including the Northcliffe bushfire, which burnt a total area of close to 100 000 ha, including approximately 4500 ha of private land and two homes, making it the largest individual fire in the south-west forests since the Dwellingup fire of January 1961
  • Lightning contributed to the ignition of a number of fires around Esperance in Western Australia on 15 November. These fires continued to burn and became uncontained on the 17th in catastrophic fire weather with very hot, dry and windy conditions followed by a significant wind change. Four people perished in the fires, which collectively burnt approximately 145 000 hectares, including vast areas of cropping land

Extreme temperatures

  • 20-23 January: extreme hot maximum temperatures in the high-forties were reported in the Pilbara and Gascoyne. Marble Bar recorded a maximum temperature of 49.0 °C on the 23rd, which was the 2nd-highest temperature in Australia in 2015, and its 3rd-highest all-time temperature on record
  • 19-21 February: a hot airmass stagnated in the northwest, resulting in extreme high maximum temperatures and minimum temperatures in the Pilbara. Roebourne Aero recorded 3 consecutive days with temperature over 48 °C, ranking in the top four highest temperatures in Australia in 2015 (highest: 49.2 °C on the 21st, 3rd-highest: 48.6 °C on the 19th, equal 4th-highest: 48.0 °C on the 20th). A minimum temperature of 35.1 °C on the 21st at Wittenoom is the highest minimum temperature in Australia in 2015

Further information

Media
(03) 9669 4057
Enquiries

Extremes in 2015
Hottest day 49.2 °C at Roebourne Aero on 21 Feb
Warmest days on average 36.5 °C at Fitzroy Crossing Aero
Coolest days on average 20.3 °C at Albany
Coldest day 9.5 °C at Ravensthorpe on 8 Jul
Coldest night -4.0 °C at Norseman Aero on 22 Jul
Coolest nights on average 8.6 °C at Wandering
Warmest nights on average 26.6 °C at Browse Island
22.5 °C at Argyle Aerodrome
Warmest night 35.1 °C at Wittenoom on 21 Feb
Warmest on average overall 29.3 °C at Wyndham Aero
Coolest on average overall 15.5 °C at Shannon
Wettest overall 1274.4 mm at Theda
Driest overall 149.2 mm at Forrest
Wettest day 400 mm (rain gauge overflowed) at Cape Leveque on 8 Jan
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


Monthly maps
Rainfall rankMaximum temperature rankMinimum temperature rank
January Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
February Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
March Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
April Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
May Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
June Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
July Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
August Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
September Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
October Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
November Map of Rainfall deciles Map of Decile rank of mean maximum temperature Map of Decile rank of mean minimum temperature
December Map of Rainfall deciles Map of Decile rank of mean maximum 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 daily rainfall
New record
(mm)
Old
record
Years of
record
Wongan Hills 86.2 on 31 Jul 81.3 on 19 Mar 1942 109
Miling 98.0 on 31 Jul 73.7 on 14 Apr 1961 88
Spring Valley 123.4 on 7 Nov 80.2 on 29 Jan 1990 57
Eneabba 95.2 on 31 Jul 78.4 on 7 Feb 2008 50
Eurardy 103.0 on 14 Mar 90.0 on 21 May 1988 33
Mount Barker North 100.6 on 10 Apr 96.0 on 17 Apr 2002 31
Mingah Springs 121.2 on 4 Mar 106.6 on 25 Mar 1999 26



Record lowest annual total rainfall
New record
(mm)
Old
record
Years of
record
Annual
average
Albany 596.3 628.5 in 1972 137 929.1

Lowest annual total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Annual
average
Derby Aero 401.8 319.6 in 1972* 691.0
Barrett Meadows 691.0 641.2 in 1987 1004.1
Argyle Aerodrome 526.6 352.9 in 1992* 760.8
Jubilee Downs 401.6 200.2 in 1992* 547.1

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




Record highest temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Carnarvon Airport 47.8 on 20 Jan = 47.8 on 6 Mar 2007 71 27.3
Cocos Island Airport 32.8 on 7 Apr = 32.8 on 11 Apr 1998 64 29.1
Paynes Find 48.0 on 21 Jan 47.2 on 8 Jan 2013 38 27.8
Curtin Aero 45.9 on 30 Nov 45.7 on 15 Dec 2004 25 35.5
Mount Magnet Aero 47.4 on 21 Jan = 47.4 on 8 Jan 2013 21 28.6



Record lowest daily maximum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Kalbarri 14.1 on 13 Jul 14.6 on 19 Jul 1991 44 27.7
Murchison 12.0 on 13 Jul 13.2 on 30 Jun 1998 27 30.3



Record highest annual mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Narrogin 24.2 23.8 in 2014 84 22.4
Dwellingup 23.7 23.6 in 2010 75 21.9
Manjimup 22.3 22.1 in 2012 74 20.4
Corrigin 25.5 25.3 in 2014 63 23.8
Pearce RAAF 26.8 26.5 in 2013 51 25.2
Ongerup 23.0 = 23.0 in 2012 44 21.8
Beverley 26.7 26.6 in 2010 42 25.4
Pingelly 24.9 24.6 in 2010 42 23.4
Hyden 26.5 = 26.5 in 2010 38 25.1
Wagin 24.3 24.0 in 1972 38 23.0
Narembeen 26.5 26.4 in 2010 37 25.3
Jarrahwood 24.1 23.9 in 2011 29 22.6
Derby Aero 35.7 35.6 in 2005 28 34.5
Perth Metro 25.7 = 25.7 in 2011, 2012 117* 24.7

*Highest for current or previous Perth sites


Highest annual mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Annual
average
Brookton 25.5 25.6 in 1972* 24.3
Christmas Island Aero 28.0 28.4 in 1983* 27.3
Broome Airport 33.1 33.3 in 1988 32.2

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




Record highest daily minimum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Telfer Aero 33.2 on 23 Nov 33.0 on 19 Feb 1992 42 19.4
Cygnet Bay 30.5 on 2 Dec 29.9 on 24 Dec 2005 31 20.9
Carnegie 33.2 on 23 Jan 33.1 on 9 Jan 2013 27 15.2
Murchison 34.0 on 11 Feb 33.5 on 24 Feb 1991 27 14.4
Karratha Aero 32.6 on 21 Feb 31.9 on 17 Jan 2009 23 20.8
Mount Magnet Aero 32.4 on 11 Feb = 32.4 on 3 Jan 2008 21 15.1



Record highest annual mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Kalgoorlie-Boulder Airport 12.9 12.7 in 2013 72 11.7
Mardie 20.3 20.2 in 2010 55 18.8
Merredin 12.6 = 12.6 in 2014 49 11.4
Ravensthorpe 11.4 = 11.4 in 2011 46 10.5
Paynes Find 14.2 13.9 in 2014 32 12.9
Warburton Airfield 16.9 16.5 in 2013 31 14.8



Record highest annual mean temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Narrogin 17.3 17.2 in 2014 81 15.9
Manjimup 16.3 = 16.3 in 2011 74 15.1
Kalgoorlie-Boulder Airport 19.7 19.5 in 2007 72 18.5
Carnarvon Airport 23.4 = 23.4 in 2013 67 22.2
Port Hedland Airport 27.7 27.6 in 2010 66 26.4
Brookton 18.1 17.9 in 2011 46 17.0
Ongerup 16.6 = 16.6 in 2014 44 15.8
Christmas Island Aero 25.7 = 25.7 in 2014 38 25.1
Hyden 18.6 = 18.6 in 2011 38 17.5
Wagin 17.3 = 17.3 in 2013 37 16.4
Paynes Find 21.5 21.4 in 2014 32 20.4
Warburton Airfield 23.9 = 23.9 in 2013 31 22.3
Karratha Aero 27.3 = 27.3 in 2010 21 26.6

Highest annual mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Annual
average
Northam 19.1 =19.1 in 1994 18.2



Summary statistics for 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean
for
2015
Diff
from
average
Highest
for
2015
Mean
for
2015
Diff
from
average
Lowest
for
2015
Total
for
2015
Average
annual
total
Rank
of
2015
Fraction
of annual
average
North Kimberley (district 01)
Doongan 33.4 +0.4 40.3 30 Nov 17.9 -0.5 4.0 20 Jul 886.5 1142.4 low 78%
Mount Elizabeth     40.8 29 Nov 16.4 -0.1 2.1 16 May 903.1 993.7 average 91%
Wyndham Aero 36.4 +0.6 43.0 18 Feb 22.2 0.0 10.6 6 Aug 840.4 846.8 average 99%
East Kimberley (district 02)
Argyle Aerodrome 35.5 +0.8 43.4 27 Nov 22.5 +0.4 10.4 19 Jul 526.6 760.8 low 69%
Halls Creek Airport 33.8 +0.2 42.7 29 Nov 19.8 -0.2 8.8 16 Jul 660.6 571.5 high 116%
Kununurra Aero 35.7 +0.8 43.0 27 Nov 20.6 -0.6 8.7 21 Jul 682.0 835.2 low 82%
Warmun 35.7 +0.7 43.4 27 Nov     6.1 21 Jul
West Kimberley (district 03)
Bidyadanga 34.0 +0.7 43.4 10 Feb     10.6 7 Aug 368.3 514.3 low 72%
Broome Airport 33.1 +0.9 41.8 9 Feb 22.0 +0.8 7.7 16 May 425.6 611.0 low 70%
Curtin Aero 35.9 +0.4 45.9 30 Nov 21.1 +0.1 10.8 10 Aug 663.2 851.4 low 78%
Derby Aero 35.7 +1.2 44.3 28 Nov 21.6 +0.1 8.5 6 Jul 401.8 691.0 low 58%
Fitzroy Crossing Aero 36.5 +0.5 45.6 30 Nov 20.3 +0.2 6.4 19 Jul 680.8 705.4 average 97%
De Grey (district 04)
Bedout Island 30.7   40.2 20 Nov 24.4   17.9 25 May
Karratha Aero 32.9 +0.5 47.0 21 Feb 21.6 +0.8 9.6 30 Jun 185.2 298.6 low 62%
Legendre Island     44.5 21 Feb 23.2   16.5 18 Jul
Mandora 34.6 +0.5 46.7 10 Feb 20.1 +0.7 6.5 6 Jul 292.2 376.0 average 78%
Port Hedland Airport 34.3 +1.0 46.7 21 Feb 21.1 +1.7 9.8 30 Jun
Roebourne Aero 35.2 +0.5 49.2 21 Feb 20.3 +0.6 7.4 7 Aug 216.4 297.4 average 73%
Fortescue (district 05)
Barrow Island Airport 29.5 +0.3 41.0 8 Jan 22.6 +0.4 14.9 29 Jun 388.8 298.9 average 130%
Learmonth Airport 31.9 0.0 47.0 7 Jan 17.9 +0.2 6.6 1 Jul 464.4 260.1 v high 179%
Mardie 34.0 +0.1 47.6 21 Feb 20.3 +1.5 9.5 9 Jul 233.0 277.0 average 84%
Onslow Airport 32.6 +0.6 47.8 21 Feb 20.4 +1.4 10.9 1 Jul 381.6 316.7 average 120%
Wittenoom     46.0 16 Dec 20.6 +0.9 7.1 24 Jun 482.4 464.8 average 104%
West Gascoyne (district 06)
Carnarvon Airport 28.8 +1.5 47.8 20 Jan 18.0 +0.8 5.2 11 Jul 207.5 226.0 average 92%
Denham 27.6 +0.8 46.5 20 Jan 18.5 +0.7 8.5 10 Jul 335.2 224.6 high 149%
Emu Creek Station 34.3 +0.5 48.0 11 Feb 18.4 +0.1 6.0 10 Jul 388.5 301.4 high 129%
Murchison 30.7 +0.4 47.0 11 Feb 15.9 +1.5 1.0 10 Jul 262.7 232.3 average 113%
Shark Bay Airport 29.5 +0.4 47.3 20 Jan 17.1 +0.7 6.7 3 Sep 375.4 213.9 high 176%
East Gascoyne (district 07)
Newman Aero 32.2 +0.2 45.5 31 Dec 17.5 +1.2 0.7 19 Jul 448.8 330.1 high 136%
Paraburdoo Aero 33.6 +0.1 45.7 11 Feb 18.7 +0.6 5.8 30 Jun 441.8 324.0 high 136%
Murchison (district 07A)
Meekatharra Airport 30.0 +1.0 46.7 22 Jan 16.9 +1.0 2.3 10 Jul 264.0 239.1 average 110%
Mount Magnet Aero 29.3 +0.7 47.4 21 Jan 16.0 +0.9 2.1 10 Jul 298.0 257.5 high 116%
Paynes Find 28.9 +1.1 48.0 21 Jan 14.2 +1.3 -1.5 10 Jul 222.6 289.7 low 77%
North Coast (district 08)
Dalwallinu 26.8 +0.5 44.5 21 Jan 12.4 +0.7 1.0 2 Sep 354.6 294.4 high 120%
Geraldton Airport 27.3   45.1 28 Dec 14.3   2.3 9 Jul 360.2
Kalbarri 28.4 +0.7 46.4 20 Jan     2.4 9 Jul 379.2 347.1 average 109%
Morawa Airport 28.8 +0.6 47.2 21 Jan 14.0 +1.2 -0.1 10 Jul
North Island 25.1 +0.3 33.9 21 Nov 18.9 +0.3 10.0 30 Jun 336.2 286.0 high 118%
Wongan Hills 26.8 +1.1 44.2 21 Jan 12.6 +0.6 0.7 9 Jul 358.7 387.1 average 93%
Central Coast (district 09)
Bickley 23.3 +0.7 41.3 5 Jan 11.8 +0.6 2.4 9 Jul 877.8 1076.6 low 82%
Garden Island HSF 23.0 +0.2 39.4 5 Jan 15.3 +0.3 5.0 22 Aug 476.0 598.0 low 80%
Gingin Aero 26.3 +0.8 44.4 5 Jan 11.3 +0.3 -2.5 9 Jul 525.8 620.2 low 85%
Jandakot Aero 25.4 +0.8 43.7 5 Jan 12.0 +0.6 -1.5 9 Jul 651.2 824.3 v low 79%
Karnet 23.5 +0.9 41.0 5 Jan     -0.5 9 Aug 892.2 1162.0 v low 77%
Pearce RAAF 26.8 +1.6 45.4 5 Jan 12.5 +0.3 0.2 9 Jul 500.6 651.1 low 77%
Perth Airport 26.0 +1.5 44.2 5 Jan 13.0 +0.9 0.1 9 Jul 577.8 767.4 v low 75%
Perth Metro 25.7 +1.0 44.4 5 Jan 13.3 +0.5 0.8 9 Jul 617.8 846.6 low 73%
Rottnest Island 22.7 +0.5 39.4 5 Jan 16.0 +0.3 7.3 9 Aug 542.6 691.7 average 78%
Swanbourne 25.0 +0.9 43.2 5 Jan 14.3 +0.4 3.7 9 Jul 667.0 721.2 low 92%
South Coast (district 09A)
Albany 20.3 +0.8 37.5 13 Mar 13.2 +1.5 5.0 24 Jun 596.3 929.1 lowest 64%
Albany Airport 21.3   40.1 13 Mar 10.9   1.3 27 Jul 722.4
Bridgetown 23.1 +0.7 40.8 5 Jan 8.9 +0.3 -2.3 13 Jul 584.6 721.4 low 81%
Busselton Aero 23.6 +0.5 39.6 5 Jan 10.4 +0.1 0.1 23 Jun 567.4 680.0 low 83%
Cape Leeuwin 20.7 +0.9 34.2 4 Feb 14.9 +0.8 7.8 16 Jul 648.2 962.5 v low 67%
Cape Naturaliste 22.2 +1.5 37.0 30 Jan 13.2 +0.5 5.7 2 Sep 619.0 805.3 low 77%
Collie East 24.2 +1.0 41.2 5 Jan 8.8 +0.3 -2.4 9 Jul 475.4 709.1 v low 67%
Dwellingup 23.7 +1.8 41.7 5 Jan 10.5 +1.0 -1.2 9 Jul 779.0 1234.1 v low 63%
Esperance 22.5 +0.6 41.8 9 Feb 12.6 +0.5 4.3 3 Sep 521.4 616.7 low 85%
Esperance Aero 23.2 +1.0 43.8 9 Feb 11.7 +0.4 3.3 3 Sep 542.2 566.9 average 96%
Hopetoun North 21.2 -1.0 42.0 13 Mar 10.8 -0.7 0.6 17 Jul 473.4 496.3 average 95%
Jarrahwood 24.1 +1.5 41.0 5 Jan 8.9 +0.3 -2.8 13 Jul 754.0 924.8 low 82%
Mandurah 24.1 +0.8 40.2 30 Jan 14.9 +0.1 4.4 9 Jul
Manjimup 22.3 +1.9 40.7 5 Jan 10.4 +0.7 2.0 12 Jul 673.2 994.2 v low 68%
North Walpole 20.8 +0.5 38.5 4 Feb 12.0 +0.3 4.5 5 Aug 939.0
Rocky Gully 21.5 +0.6 39.7 5 Jan 9.9 +0.3 0.8 13 Jul 668.2 698.3 average 96%
Shannon 20.9 +0.4 38.3 13 Mar 10.1 +0.4 1.6 29 Jun 833.4 1013.3 v low 82%
Witchcliffe 21.8 +0.4 36.8 28 Jan 10.8 +0.1 1.7 29 May 836.4 947.4 low 88%
North Central (district 10)
Bencubbin 26.0 +0.6 45.3 21 Jan 12.6 +1.0 0.3 2 Sep 374.0 316.0 high 118%
Cunderdin Airfield 27.2 +1.2 45.4 29 Dec 11.2 +0.7 -1.5 24 Jul 241.6 296.3 low 82%
Merredin     45.5 21 Jan 12.6 +1.2 -1.0 24 Jul 360.9 325.8 average 111%
Northam 26.7 +1.3 44.0 5 Jan 11.4 +0.5 -0.6 9 Jul 324.3 427.1 low 76%
York 26.7 +1.1 43.5 21 Jan     -3.0 9 Jul 336.0 379.7 low 88%
South Central (district 10A)
Beverley 26.7 +1.3 43.8 5 Jan 10.5 +0.3 -2.2 9 Jul 296.9 416.9 v low 71%
Brookton 25.5 +1.2 43.3 5 Jan 10.6 +0.9 -1.4 9 Jul 341.5 450.2 low 76%
Corrigin 25.5 +1.7 43.1 29 Dec 10.6 +0.6 -2.2 12 Jul 270.1 371.8 low 73%
Hyden 26.5 +1.4 44.4 21 Jan 10.7 +0.7 -1.0 2 Sep 265.3 339.4 low 78%
Jacup 23.0 +1.0 44.1 6 Jan 9.7 +0.4 0.4 9 Jul 411.2 458.4 low 90%
Katanning 23.4 +0.9 42.1 29 Dec 10.0 +0.4 0.4 13 Jul
Lake Grace 24.3 +0.7 42.4 29 Dec 11.0 +0.6 0.2 9 Jul 404.8 338.8 high 119%
Narembeen 26.5 +1.2 43.6 21 Jan     -0.9 24 Jul 252.7 332.0 low 76%
Narrogin 24.2 +1.8 41.4 5 Jan 10.3 +0.9 -1.6 9 Jul 361.2 492.7 low 73%
Newdegate Research Station 24.6 +1.2 43.8 6 Jan 8.9 +0.1 -1.8 21 Sep 353.0 369.9 average 95%
Ongerup 23.0 +1.2 41.4 29 Dec 10.2 +0.4 0.4 29 May 329.4 385.0 low 86%
Pingelly 24.9 +1.5 41.6 5 Jan 10.9 +0.5 0.4 24 Jul 323.2 444.9 low 73%
Ravensthorpe 23.4 +0.6 41.8 29 Dec 11.4 +0.9 1.0 3 Sep 511.0 427.6 high 120%
Wagin 24.3 +1.3 41.8 5 Jan 10.4 +0.7 -1.3 9 Jul 309.0 431.9 v low 72%
Wandering 24.7 +0.9 43.1 5 Jan 8.6 +0.1 -3.0 9 Jul 460.8 509.7 low 90%
Eucla (district 11)
Eucla 23.5 +0.6 47.6 14 Feb 12.6 +0.4 2.1 19 Jul 306.4 273.4 high 112%
Eyre 24.4 +1.5 44.4 30 Dec 10.2 -0.6 -3.4 6 Aug 338.8 314.3 high 108%
Forrest 27.0 +0.7 47.5 14 Feb 11.3 +0.3 -0.3 19 Jul 149.2 223.8 low 67%
Red Rocks Point 22.3 -0.1 43.7 14 Feb 13.3 +0.1 2.3 22 Jul 255.4 356.7 low 72%
South East (district 12)
Bulga Downs 29.2 +0.4 48.0 21 Jan 14.1 +0.5 -0.8 10 Aug 217.8 235.2 average 93%
Kalgoorlie-Boulder Airport 26.4 +1.1 44.7 18 Jan 12.9 +1.2 -0.2 2 Sep 232.8 266.4 average 87%
Laverton Aero 28.3 +1.3 45.7 22 Jan 14.8 +0.9 -0.7 10 Jul 240.0 289.5 low 83%
Leonora Aero 28.6   47.0 21 Jan 15.0   0.6 10 Jul 202.2
Munglinup West 24.0 +0.8 42.7 6 Jan 10.9 +0.3 2.8 3 Sep 456.6 448.3 average 102%
Norseman Aero 25.7 +0.6 43.7 21 Jan 10.4 +0.5 -4.0 22 Jul 250.8 305.3 average 82%
Salmon Gums Res.Stn. 24.5 +1.0 44.8 9 Feb 9.6 +0.5 -2.0 21 Sep 373.2 354.9 average 105%
Southern Cross Airfield 26.4 +0.5 46.3 21 Jan 11.5 +1.1 -2.5 24 Jul 358.4 305.5 average 117%
Yeelirrie 29.7 +0.9 47.0 21 Jan 13.4 +0.6 -3.1 19 Jul 220.5 240.5 average 92%
North East (district 13)
Carnegie 31.4 +0.9 46.5 22 Jan     0.4 20 Jul 238.8 236.7 average 101%
Giles Meteorological Office 30.4 +1.0 43.5 20 Jan 16.6 +0.7 1.6 18 Jul 251.6 287.9 average 87%
Telfer Aero 35.0 +0.9 47.1 22 Jan 20.4 +1.0 6.1 16 May 208.6 367.1 low 57%
Warburton Airfield 30.9 +1.1 44.9 11 Feb 16.9 +2.1 0.9 11 Aug 182.4 244.3 average 75%
Offshore Islands (district 200)
Adele Island 30.2   35.6 21 Mar 24.4   9.2 28 Dec
Browse Island 29.8   34.0 11 Dec 26.6   22.0 6 Feb
Christmas Island Aero 28.0 +0.7 30.6 12 Apr 23.3 +0.5 20.1 5 Jan 1722.4 2116.9 average 81%
Cocos Island Airport 29.7 +0.6 32.8 7 Apr 25.3 +0.7 21.2 11 Aug 1472.4 1983.5 low 74%
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 Annual 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 Wednesday 6 January 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

Media
(03) 9669 4057
Enquiries