Western Australia in January 2015: Hot in the west, wet in the Kimberley

Mean maximum temperatures were above to very much above average across much of western and central WA in January, and a few sites in the South West and Great Southern registered record high mean maxima in January, whilst much of the Kimberley and Northern Interior, and a small area near the west Pilbara coast recorded below average day-time temperatures. Averaged across the State, the mean maximum temperature was 0.65 °C above the long-term average. Averaged across the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), the January mean maximum for the region was 1.43 °C above the long-term average, and the seventh-highest since comparable records commenced in 1910.

A large pool of hot air stagnated over northwest WA during the second half of the month and resulted in daily maxima persistently in the mid- to high-forties. Several January temperature records were broken at sites in the northern Central West, Gascoyne and Pilbara districts as a result. Carnarvon Airport recorded a daily maximum temperature of 47.8 °C on the 20th, which is the highest temperature in January at Carnarvon Airport in 69 years of record, and also the equal highest temperature for any month, equal with 47.8 °C on 6 March 2007. A daily maximum temperature of 49.0 °C at Marble Bar on the 23rd was its third highest temperature since records began in 1901, only behind 49.2 °C recorded on both 11 January 1905 and 3 January 1922.

Mean minimum temperatures were above to very much above average in a large area covering northwest, central, and southern WA, whilst areas in the west and southeast Kimberley, as well as the eastern Northern Interior saw below average mean minimum temperatures. Averaged across the State, the mean minimum temperature was 0.62 ° C above the long-term average, whilst for the Lower Southwest the mean minimum was near average at 0.10 °C above the mean.

Rainfall in January 2015 was below to very much below average in patchy areas of the Pilbara and Gascoyne, and in much of the eastern and coastal SWLD, and Goldfields. Sites in the Southwest, South Coastal, Goldfields, east Pilbara and west Kimberley recorded their driest January in at least 20 years, whilst Walpole in the South West recorded its driest January in 64 years of record. Areas of above average rainfall were reported across large parts of the Kimberley and Northern Interior, and Curtin Aerodrome in the west Kimberley recorded its wettest January in its 21 year recording history. Averaged across the state as a whole, January 2015 rainfall was near average, whilst for the SWLD, rainfall in January 2015 was below average, and the driest for five years, since 2010. The Lower Southwest also recorded below average rainfall for January.

A significant tropical low developed near the north Kimberley on 2 January and remained over the Kimberley for the next week, first tracking southwest then south before turning eastward and moving through the east Kimberley into the Northern Territory on the 10th. Numerous sites in the Kimberley received very heavy rainfall during the event with daily totals commonly between 80 mm to 200 mm, resulting in some minor flooding on the King, Dunham and Fitzroy Rivers. Four sites in the Kimberley recorded their wettest January day on record. Cape Leveque recorded 400.0 mm on the 8th, from a rain gauge that had overflowed so the actual daily total was almost certainly higher, which was its wettest day for any month in 94 years of recording, and was WA's 10th highest January daily fall on record. Another tropical low tracked westward across the Kimberley from the 17th to 19th before moving off the west Kimberley coast. Warmun in the east Kimberley recorded 190.0 mm on the 19th, its highest daily fall in 108 years of recording, and significant stream rises with areas of flooding occurred in parts of the east and west Kimberley.

A deep trough near the west coast and across northern WA on 29 January triggered widespread thunderstorms in the western SWLD, Gascoyne and across the north. Hail up to 3 cm in diameter was reported in Collie in the South West. Moderate to heavy daily totals were recorded in the Kimberley, though rainfall was generally light in the Gascoyne and the southwest of the state. The event brought an end to a dry spell of sixty days or more for many sites around Perth and near the west coast, with the first rainfall recorded since late November 2014.

  • Tropical lows brought heavy rainfall to the Kimberley from the 2nd to the 10th, and 17th to 19th
  • Third-highest all-time temperature on record at Marble Bar on the 23rd (49.0 °C)
  • Equal highest temperature on record at Carnarvon Airport on the 20th (47.8 °C)
  • WA's tenth-highest January daily rainfall at Cape Leveque on the 8th (400.0 mm)
  • Severe thunderstorms in the Gascoyne and the western SWLD on the 29th

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Extremes in January 2015
Hottest day 49.0 °C at Marble Bar on the 23rd
Warmest days on average 42.4 °C at Emu Creek Station
Coolest days on average 23.4 °C at Albany
Coldest day 17.3 °C at Giles Meteorological Office on the 10th
Coldest night 6.0 °C at Eyre on the 29th
Coolest nights on average 13.1 °C at Rocky Gully
Warmest nights on average 27.5 °C at Bedout Island
27.3 °C at Karratha Aero
Warmest night 33.3 °C at Paraburdoo Aero on the 7th
Warmest on average overall 34.4 °C at Paraburdoo Aero
Coolest on average overall 20.2 °C at North Walpole
Wettest overall 633.5 mm at Cygnet Bay
Wettest day 400 mm or higher (rain gauge overflowed) at Cape Leveque on the 8th
Strongest wind gust 102 km/h at Paraburdoo Aero on the 22nd

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 January daily rainfall
New record
(mm)
Old
record
Years of
record
Cape Leveque 400.0* on the 8th 239.8 on the 27th in 2012 90
Warmun 190.0 on the 19th 145.3 on the 17th in 1907 90
Udialla 171.4 on the 8th 167.0 on the 30th in 1978 58
Flora Valley 113.0 on the 5th 105.0 on the 17th in 2014 38
* rain gauge overflow


Record highest January total rainfall
New record
(mm)
Old
record
Years of
record
Average for
January
Curtin Aero 454.8 422.4 in 2011 21 224.5

Highest January total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
January
Warmun 405.5 612.6 in 1959 56 181.8
Udialla 565.8 584.3 in 1978* 35 207.1

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

Record lowest January total rainfall
New record
(mm)
Old
record
Years of
record
Average for
January
Walpole 3.7 4.0 in 1986 64 26.3

Lowest January total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Years since
lower
Average for
January
Pemberton 1.7 1.1 in 1956 59 21.4
Warrawagine 0.8 0.0 in 1948* 53 67.7
Windrush 0.4 0.0 in 1962* 52 23.6
Cowaramup 0.3 0.0 in 1981 34 13.4
Tamar 1.6 1.4 in 1984 31 23.7
Kalgoorlie-Boulder Airport 0.6 0.2 in 1989 26 25.8
Northcliffe 1.5 0.0 in 1991 24 23.4
White Gums 0.8 0.0 in 1994 21 16.9

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




Record highest January temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Carnarvon Airport 47.8 on the 20th 47.7 on the 23rd in 1953 70 31.3
Kalbarri 46.4 on the 20th 46.1 on the 21st in 1981 40 33.3
Paynes Find 48.0 on the 21st 47.2 on the 8th in 2013 36 37.3
Denham 46.5 on the 20th 45.1 on the 30th in 1989 27 30.7
Pardoo Station 46.5 on the 23rd = 46.5 on the 7th in 2003 22 36.4
Mount Magnet Aero 47.4 on the 21st = 47.4 on the 8th in 2013 20 37.8



Record lowest January daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Giles Meteorological Office 17.3 on the 10th 19.1 on the 11th in 1983 59 37.3
Curtin Aero 25.7 on the 7th 26.0 on the 26th in 2012 24 36.5



Record highest January mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Manjimup 30.1 29.4 in 2014 75 27.2
Wagin 33.1 32.9 in 2010 40 31.1
Jarrahwood 32.3 31.6 in 2012 32 29.5

Highest January mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
January
Narrogin 33.1 33.6 in 1962* 48 31.0

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




Record highest January daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Carnegie 33.2 on the 23rd 33.1 on the 9th in 2013 25 23.9


Record highest January mean temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Murchison 33.2 32.7 in 2013 24 30.8

Highest January mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
January
Narrogin 24.3 24.4 in 1962* 47 22.6
Mullewa 30.6 =30.6 in 1974* 26 28.1

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




Summary statistics for January 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2015
Diff
from
average
Highest for
January
2015
Mean for
January
2015
Diff
from
average
Lowest for
January
2015
Total for
January
2015
Average
for
January
Rank of
January
2015
Fraction of
January
average
North Kimberley (district 01)
Doongan 32.3 -0.9 36.4 24th 23.0 +0.2 19.5 10th 207.5 298.1 low 70%
Kalumburu 33.3 -0.6 36.4 24th 24.8 +0.2 22.6 10th 362.6 312.1 high 116%
Mount Elizabeth 31.6 -1.4 35.9 24th 22.3 +0.2 19.4 10th 166.7 253.4 low 66%
Troughton Island 31.3 -0.5 32.9 27th 26.5 +0.1 23.5 10th 195.0 267.2 average 73%
Truscott 31.4 -0.7 33.2 25th 25.4 +0.1 21.8 10th 339.8 335.1 high 101%
Wyndham Aero 35.2 -1.3 39.8 24th 26.1 -0.1 23.3 17th 252.2 191.9 high 131%
East Kimberley (district 02)
Argyle Aerodrome 34.6 -1.9 39.6 24th 25.2 -0.5 21.6 1st 214.0 158.5 high 135%
Halls Creek Airport 33.4 -3.4 38.1 22nd 23.5 -0.8 19.2 10th 326.2 155.3 v high 210%
Kununurra Aero 34.7 -1.2 40.0 24th 25.0 0.0 22.0 12th 263.0 203.8 high 129%
Warmun 34.1 -3.1 38.7 24th 24.2 -0.6 21.5 21st 405.5 181.8 v high 223%
West Kimberley (district 03)
Bidyadanga 34.0 -0.4 40.2 4th 26.8 +0.8 22.3 10th 130.8 127.7 average 102%
Broome Airport 33.0 -0.3 36.5 5th 26.6 +0.3 22.6 10th 194.0 181.6 high 107%
Curtin Aero 34.0 -2.5 37.7 1st 24.3 -0.7 20.7 10th 454.8 224.5 highest 203%
Derby Aero 33.5 -1.7 37.6 1st 24.9 -0.8 21.6 10th 211.4 199.0 average 106%
Fitzroy Crossing Aero 34.6 -3.2 38.6 22nd 25.0 -0.2 21.8 10th 309.0 173.9 v high 178%
De Grey (district 04)
Bedout Island 34.1   36.8 5th 27.5   21.4 13th
Karratha Aero 35.8 -0.2 43.9 6th 27.3 +0.5 24.3 11th 2.0 48.1 low 4%
Legendre Island 32.9   35.9 24th 26.5   24.9 11th
Mandora 35.8 -0.2 44.1 6th 26.0 +0.6 22.6 10th 53.2 83.8 average 63%
Marble Bar 41.7 +0.8 49.0 23rd 26.8 +0.2 20.8 11th 48.8 86.4 average 56%
Pardoo Station 37.1 +0.7 46.5 23rd 26.3 +0.4 24.1 28th 31.8 64.6 average 49%
Port Hedland Airport 36.7 +0.3 43.1 7th 26.2 +0.6 23.2 29th 12.4 63.5 average 20%
Roebourne Aero 39.1 +0.4 46.7 23rd 26.3 0.0 22.3 31st 4.8 79.5 average 6%
Fortescue (district 05)
Barrow Island Airport 33.0 -0.3 41.0 8th 25.5 -0.5 23.5 12th 6.8 22.7 average 30%
Learmonth Airport 37.7 -0.3 47.0 7th 23.5 +0.5 20.1 2nd 6.8 32.1 average 21%
Mardie 36.4 -1.6 46.8 8th 25.6 +0.6 22.2 12th 12.8 38.1 average 34%
Onslow Airport 35.5 -1.0 47.3 8th 24.8 +0.4 22.2 3rd 2.6 39.6 average 7%
Wittenoom 40.2 +0.7 45.0 23rd 26.3 +0.3 19.3 11th 67.2 114.5 average 59%
West Gascoyne (district 06)
Carnarvon Airport 33.0 +1.7 47.8 20th 23.7 +1.2 20.8 3rd 0 12.1 lowest 0%
Denham     46.5 20th 22.6 +0.5 17.0 4th 0 7.5 lowest 0%
Emu Creek Station 42.4 +1.2 47.5 19th 25.2 +0.7 21.4 27th 11.3 47.6 average 24%
Murchison 41.4 +2.1 46.5 17th 25.0 +2.6 19.5 12th 21.7 19.7 high 110%
Shark Bay Airport 35.4 +1.4 47.3 20th 22.4 +0.8 19.8 1st 0.4 8.8 average 5%
East Gascoyne (district 07)
Newman Aero 41.0 +1.9 45.5 22nd 26.2 +1.3 17.7 12th 6.6 65.3 v low 10%
Paraburdoo Aero 42.1 +1.4 45.0 17th 26.7 +0.8 20.9 11th 43.8 51.9 average 84%
Murchison (district 07A)
Meekatharra Airport 40.7 +2.4 46.7 22nd 26.1 +1.7 19.6 10th 24.2 29.8 average 81%
Mount Magnet Aero 40.2 +2.4 47.4 21st 25.0 +1.6 19.0 10th 22.8 27.5 average 83%
Paynes Find     48.0 21st 22.5 +1.5 14.5 11th 2.8 19.3 average 15%
North Coast (district 08)
Dalwallinu 36.8 +1.5 44.5 21st 18.9 +0.8 12.9 9th 11.2 22.7 average 49%
Geraldton Airport 33.6   43.6 5th 18.6   14.1 17th 0
Kalbarri 35.0 +1.7 46.4 20th 20.6 +1.1 16.0 18th 0 4.6 lowest 0%
Morawa Airport 39.7 +2.4 47.2 21st 20.6 +0.8 16.4 2nd 2.6 21.3 average 12%
Mullewa 39.8 +3.0 46.0 21st 21.5 +2.1 15.6 2nd 12.6 12.8 average 98%
North Island 28.8 +1.3 31.9 27th 22.4 +1.1 19.0 18th 0 2.2 v low 0%
Wongan Hills 36.1 +1.5 44.2 21st 18.6 +0.7 12.5 9th 1.4 14.0 average 10%
Central Coast (district 09)
Badgingarra Research Stn 36.5 +1.8 43.7 5th 17.8 +0.8 12.9 9th 0.6 9.4 average 6%
Bickley 32.1 +1.5 41.3 5th 16.1 +0.7 11.7 8th 1.4 17.3 average 8%
Garden Island HSF 28.5 +1.1 39.4 5th 19.0 0.0 15.4 3rd 0 9.4 v low 0%
Gingin Aero 34.5 +1.4 44.4 5th 16.3 -0.2 10.3 2nd 0 14.3 v low 0%
Gosnells City 33.9 +0.7 43.8 5th 19.0 +0.4 14.0 26th 8.8 11.6 high 76%
Jandakot Aero 32.9 +1.5 43.7 5th 17.0 +0.2 13.2 20th 6.4 13.8 average 46%
Jurien Bay 30.5 +0.5 38.0 17th 16.8 -0.4 12.5 12th 0 6.7 lowest 0%
Karnet 31.7 +1.0 41.0 5th 16.0 +0.7 11.5 3rd 0 16.7 lowest 0%
Lancelin 32.2 +3.0 42.0 5th     12.6 24th 2.0 8.8 average 23%
Medina Research Centre 32.2 +1.5 44.1 5th 17.2 +0.1 12.0 3rd 3.2 11.5 average 28%
Pearce RAAF 35.4 +1.9 45.4 5th 16.8 -0.2 10.4 2nd 1.2 7.6 average 16%
Perth Airport 33.8 +2.1 44.2 5th 17.7 +0.7 13.7 12th 0.2 9.4 low 2%
Perth Metro 33.0 +1.9 44.4 5th 18.2 +0.1 15.2 9th 18.6 9.6 high 154%
Rottnest Island 27.7 +1.2 39.4 5th 19.1 0.0 15.8 9th 0.4 7.6 average 5%
Swanbourne 31.9 +2.1 43.2 5th 18.3 +0.1 14.2 3rd 1.2 14.6 average 8%
South Coast (district 09A)
Albany 23.4 +0.6 28.9 29th 17.1 +1.9 11.8 4th 5.5 23.7 low 23%
Albany Airport 26.2   38.6 28th 14.9   8.9 4th 9.8
Bridgetown 31.6 +1.8 40.8 5th 13.3 +0.2 6.8 16th 0 13.7 v low 0%
Bunbury 31.2 +1.5 39.7 5th 15.4 0.0 8.2 3rd 0 10.6 lowest 0%
Busselton Aero 31.6 +1.5 39.6 5th 13.9 -0.4 7.2 24th 0 10.8 v low 0%
Cape Leeuwin 23.5 +0.4 28.3 28th 17.8 +0.8 14.9 9th 0.8 16.0 v low 5%
Cape Naturaliste 27.7 +2.3 37.0 30th 15.6 +0.4 11.0 16th 0.2 10.4 v low 2%
Collie East     41.2 5th 13.5 +0.1 6.8 3rd 3.0 15.3 average 20%
Donnybrook 32.7 +2.2 42.5 5th 15.7 +1.7 10.2 3rd 0 11.9 lowest 0%
Dwellingup 32.6 +3.0 41.7 5th 15.2 +0.9 10.3 3rd 0 15.3 lowest 0%
Esperance 26.1 -0.1 40.4 18th 15.9 +0.2 11.8 12th 2.2 26.6 v low 8%
Esperance Aero 28.6 +0.9 40.7 21st 14.8 -0.1 10.9 12th 10.2 27.2 average 38%
Hopetoun North 25.6 +0.2 36.4 18th 15.5 +0.2 9.9 12th 2.6 39.9 low 7%
Jarrahwood 32.3 +2.8 41.0 5th 13.6 +1.0 6.5 16th 0.8 13.7 low 6%
Mandurah 30.9 +1.6 40.2 30th 19.1 +0.2 15.1 3rd 0.4 15.1 low 3%
Manjimup 30.1 +2.9 40.7 5th 13.5 +0.4 9.5 26th 13.2 19.4 average 68%
North Walpole 25.6 +1.3 37.3 28th 14.9 +0.4 10.4 4th 6.6 25.3 v low 26%
Pemberton 28.6 +2.4 39.0 5th 13.3 +0.1 9.0 26th 1.7 21.4 v low 8%
Rocky Gully 28.7 +1.2 39.7 5th 13.1 +0.4 7.0 3rd 12.2 16.3 average 75%
Shannon 27.8 +1.3 38.3 5th 13.2 +0.5 9.1 16th 10.0 16.3 average 61%
Witchcliffe 27.5 +1.0 36.8 28th 13.9 0.0 8.5 16th 0.2 10.4 v low 2%
North Central (district 10)
Bencubbin 35.6 +1.1 45.3 21st 19.5 +1.4 12.6 9th 43.6 16.9 high 258%
Cunderdin Airfield 36.4 +1.6 44.5 21st 17.3 0.0 12.8 9th 0.8 21.8 average 4%
Merredin 35.8 +1.9 45.5 21st 18.6 +0.8 13.0 9th 4.0 14.5 average 28%
Northam 35.5 +1.3 44.0 5th 17.8 +0.6 13.6 9th 0.4 10.3 average 4%
York 35.7 +1.5 43.5 21st 16.0 -0.5 12.1 12th 0.4 25.9 average 2%
South Central (district 10A)
Beverley 36.1 +1.8 43.8 5th 16.5 +0.1 13.0 8th 4.2 11.8 average 36%
Brookton 34.5 +1.5 43.3 5th 16.4 +0.9 11.3 3rd 6.5 12.5 average 52%
Corrigin 34.2 +1.6 42.4 5th 16.4 +0.5 12.3 11th 1.0 16.7 average 6%
Hyden 35.3 +1.6 44.4 21st 16.3 +0.7 11.2 9th 0.2 19.0 low 1%
Jacup 29.5 +1.8 44.1 6th 13.3 +0.2 7.1 16th 5.4 32.4 low 17%
Katanning 32.0 +2.0 41.2 5th 14.0 +0.3 9.1 3rd 1.0 25.0 low 4%
Lake Grace 32.5 +1.4 41.6 6th 15.8 +0.5 11.2 3rd 2.8 37.8 low 7%
Narembeen     43.6 21st 17.4 +0.8 11.0 26th 1.7 16.1 average 11%
Narrogin 33.1 +2.1 41.4 5th 15.5 +1.3 11.4 3rd 3.2 12.7 average 25%
Newdegate Research Station 33.3 +2.3 43.8 6th 13.8 -0.1 6.6 24th 0 18.4 lowest 0%
Ongerup 30.4 +1.8 41.2 6th 14.3 +0.4 9.1 16th 1.2 18.4 low 7%
Pingelly 33.6 +1.7 41.6 5th 15.9 +0.4 11.3 3rd 6.8 10.9 average 62%
Ravensthorpe 29.2 +0.2 41.8 6th 14.9 +0.8 8.9 11th 7.0 24.7 average 28%
Wagin 33.1 +2.0 41.8 5th 15.2 +0.6 11.1 24th 11.2 12.6 high 89%
Wandering 33.8 +1.7 43.1 5th 13.9 -0.3 8.6 3rd 0 16.2 v low 0%
Eucla (district 11)
Balladonia 31.7 +0.4 42.7 21st 14.7 0.0 10.9 13th 1.6 19.6 low 8%
Eucla 25.9 0.0 43.0 19th 17.1 +0.5 11.0 24th 19.6 15.2 high 129%
Eyre 26.4 -0.1 38.0 18th 14.4 -0.9 6.0 29th 14.8 17.3 average 86%
Forrest 33.4 +0.3 44.0 19th 16.5 +0.2 11.9 14th 0.2 25.1 v low 1%
Red Rocks Point 24.2 -0.8 29.9 19th 17.9 -0.4 11.6 24th 5.8 27.5 low 21%
South East (district 12)
Bulga Downs 39.6 +1.9 48.0 21st 23.1 +0.7 14.3 10th 0 30.0 lowest 0%
Kalgoorlie-Boulder Airport 34.9 +1.3 44.7 18th 18.8 +0.5 13.7 10th 0.6 25.8 low 2%
Laverton Aero 38.0 +2.5 45.7 22nd 22.4 +0.9 14.5 9th 4.2 42.1 low 10%
Leinster Aero 39.1 +1.9 46.9 21st 24.6 +1.4 15.3 10th 0 39.5 lowest 0%
Leonora Aero 38.6   47.0 21st 23.6   15.8 10th 0.4
Munglinup West 30.5 +1.8 42.7 6th 14.3 -0.2 9.8 11th 2.6 42.3 v low 6%
Norseman Aero 33.1 +0.7 43.7 21st 15.3 -0.6 9.3 12th 0 38.2 v low 0%
Salmon Gums Res.Stn. 31.9 +1.3 42.8 21st 13.7 -0.2 6.1 11th 3.0 26.4 low 11%
Southern Cross Airfield 35.7 +1.0 46.3 21st 18.7 +0.9 12.5 10th 0 28.9 v low 0%
Yeelirrie     47.0 21st 23.7 +1.5 16.0 11th 17.9 29.6 average 60%
North East (district 13)
Carnegie 39.8 +1.0 46.5 22nd 24.8 +0.9 16.5 10th 26.1 30.9 average 84%
Giles Meteorological Office 36.8 -0.5 43.5 20th 23.5 -0.1 14.0 11th 11.0 29.6 low 37%
Telfer Aero 40.0 -0.5 47.1 22nd 25.9 -0.1 19.7 11th 80.6 52.8 high 153%
Warburton Airfield 38.7 +0.7 44.5 22nd 24.5 +1.5 16.2 10th 16.6 28.2 average 59%
Wiluna 40.2 +2.3 46.0 22nd 24.7 +1.8 16.5 10th 83.9 37.0 high 227%
Offshore Islands (district 200)
Adele Island 30.5   32.1 2nd 25.8   22.2 4th
Browse Island 29.5   30.4 27th 26.1   22.3 10th
Christmas Island Aero 28.5 +0.6 29.5 23rd 22.6 -0.1 20.1 5th 204.4 296.8 average 69%
Cocos Island Airport 30.3 +0.6 31.6 26th 25.2 +0.4 23.1 4th 92.4 162.8 average 57%

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.

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 Monday 2 February 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.

Further information

Media
(03) 9669 4057
Enquiries