Western Australia in October 2017: Above average temperatures in the north and east

Daytime temperatures were warmer than normal in the north and east of Western Australia in October 2017. Averaged across the State, the mean maximum temperature was 1.4 °C above average. Overnight temperatures were warmer than normal near the west coast, and across most of northern and eastern WA, while cooler nights were reported in parts of the Goldfields and adjacent areas. The mean minimum temperature for the state as a whole was 1.2 °C above average. Monthly rainfall was mostly near average or below average in western and southern parts of the State, while the eastern half was mostly above average. State-wide averaged October rainfall was above average, and the wettest since 2011.

Below average to near average rainfall in western half, above average in eastern half

  • Rainfall for WA was above average and the wettest for six years, since 2011
  • Rainfall for the South West Land Division (SWLD) was below average
  • Isolated thunderstorms in the west Kimberley in the afternoon and evening of the 12th produced a few record high daily rainfalls on the 13th
  • A deep trough produced thunderstorms with moderate to heavy rainfall in central WA, from the southern Pilbara to the eastern SWLD from the 13th to 15th; a number of sites recorded their wettest October day on record
  • A few sites in the Central Wheat Belt had their wettest October for at least 70 years, mainly as the result of the thundertorms on the 13th and 14th
  • Monthly rainfall was mostly less than 10 mm in most of the Eucla, and a total of 3.4 mm at Eyre was its lowest October total rainfall since 1988

Hot days and warm nights in the north and east; mild nights near the west coast

  • The mean maximum temperature for WA was 1.4 °C above average, and 0.9 °C above average for the SWLD
  • It was extreme hot in the Kimberley at the end of the month; West Roebuck recorded a national highest temperature of the month with 45.0 °C on the 30th
  • Broome Airport recorded a maximum temperature of 43.4 °C on the 30th, which was its hottest October day in 78 years of record
  • Derby Aerodrome recorded 44.4 °C on the 19th and 44.8 °C on the 30th, both exceeded its previous October record of 44.1 °C
  • Several locations in the Kimberley and Pilbara recorded 10 to 20 days with maximum temperatures of 40 °C or higher
  • Kunnuurra Aerodrome recorded 20 days with maximum temperatures at 40 °C or higher, which exceeded its previous record of 19 such days in October set in 2013 and 1987; it also set a new record for October mean maximum temperature as a result
  • Leinster Aerodrome registered its record cold October day on the 5th due to persistent rain and cloud over the northern Goldfields that day
  • Swanbourne registered its record cold October day on the 7th after the passage of a cold front that was followed by cold southerly winds
  • The mean minimum temperature for WA was 1.2 °C above average, whilst the SWLD was 0.7 °C above average
  • Fresh easterly winds following previous hot daytime temperatures resulted in Bidyadanga and Mandora in the west Kimberley recording their highest October daily minimum temperature on record on the 20th

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Extremes in October 2017
Hottest day 45.0 °C at West Roebuck on the 30th
Warmest days on average 41.5 °C at Fitzroy Crossing Aero
Coolest days on average 18.5 °C at Shannon
Coldest day 11.6 °C at Mount Barker on the 4th
Coldest night -1.2 °C at Eyre on the 12th
Coolest nights on average 6.7 °C at Wandering
Warmest nights on average 27.6 °C at Troughton Island
26.4 °C at Argyle Aerodrome
Warmest night 30.5 °C at Bidyadanga on the 20th
Warmest on average overall 33.3 °C at Wyndham Aero
Coolest on average overall 13.5 °C at Bridgetown
Wettest overall 128.5 mm at Theda
Driest overall 0 mm at Badgingarra Research Stn and others
Wettest day 53.0 mm at Ygnattering on the 14th
Strongest wind gust 107 km/h at Newman Aero on the 14th

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 October daily rainfall
New record
(mm)
Old
record
Years of
record
Yeeda 42.0 on the 13th 38.1 on the 10th in 1954 113
Kellerberrin 45.0 on the 14th 36.6 on the 1st in 1919 111
Tammin 47.4 on the 14th 30.0 on the 1st in 1919 107
Yorkrakine 49.0 on the 14th 29.2 on the 18th in 1995 92
Bungulla 45.0 on the 14th 27.9 on the 26th in 1947 90
Nanyanine 32.0 on the 14th 30.2 on the 25th in 1947 79
Carnegie 29.6 on the 15th 29.0 on the 4th in 1975 62
Spring Valley 51.0 on the 14th 28.0 on the 18th in 1995 58
Coodernuppin 40.0 on the 14th 29.0 on the 18th in 1995 50
Newman Aero 23.2 on the 15th 19.8 on the 25th in 2012 42
Curtin Aero 26.8 on the 13th 21.6 on the 29th in 2015 24



Highest October total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
October
Tammin 54.8 58.3 in 1941 19.3
Doongin Peak 48.0 57.7 in 1947 19.1
Yeeda 42.0 45.2 in 1975* 4.3

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





Lowest October total rainfall for at least 20 years
Eyre 3.4 2.0 in 1988 19.2

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




Record highest October temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Broome Airport 43.4 on the 30th 42.8 on the 30th in 1953 79 32.9
Derby Aero 44.8 on the 30th 44.1 on the 7th in 2014 33 37.2



Record lowest October daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Swanbourne 15.8 on the 7th 15.9 on the 6th in 1994 25 22.3
Leinster Aero 14.0 on the 5th 16.0 on the 7th in 2001 24 30.0



Record highest October mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Derby Aero 39.4 39.0 in 2013 32 37.2
Kununurra Aero 40.4 40.2 in 1987 31 38.7



Record highest October daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Bidyadanga 30.5 on the 20th 28.0 on the 29th in 2016 59 21.1
Mandora 29.8 on the 20th 28.6 on the 27th in 1996 55 19.1
Esperance 19.8 on the 16th 19.2 on the 18th in 1991 49 10.8



Record highest October mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Troughton Island 27.6 = 27.6 in 2016 39 26.3



Record highest October mean temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Broome Airport 29.9 = 29.9 in 2013 78 27.7
Derby Aero 31.9 31.7 in 1998 32 30.2
Doongan 30.6 = 30.6 in 2005 27 29.0
Argyle Aerodrome 33.1 33.0 in 2013 23 31.7



Summary statistics for October 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
October
2017
Diff
from
average
Highest for
October
2017
Mean for
October
2017
Diff
from
average
Lowest for
October
2017
Total for
October
2017
Average
for
October
Rank of
October
2017
Fraction of
October
average
North Kimberley (district 01)
Doongan 38.3 +1.4 40.2 18th 22.9 +1.7 20.5 1st 82.3 38.4 high 214%
Kalumburu 37.4 +0.6 40.6 16th 24.4 +1.9 22.3 5th 58.6 39.1 high 150%
Mount Elizabeth 36.9 +0.9 39.5 25th     17.5 22nd 70.8 32.7 high 217%
Troughton Island 32.6 +0.8 33.4 31st 27.6 +1.3 25.7 3rd 0.4 2.5 average 16%
Truscott 34.9 +0.6 37.7 22nd 25.9 +1.4 22.4 14th 13.6 22.0 average 62%
Wyndham Aero 40.5 +1.1 43.2 18th 26.1 +1.4 21.2 16th 41.2 19.7 high 209%
East Kimberley (district 02)
Argyle Aerodrome 39.9 +1.5 42.5 28th 26.4 +1.3 22.4 23rd 7.4 32.6 low 23%
Halls Creek Airport 38.5   42.2 26th 22.5   17.9 23rd 13.6
Kununurra Aero 40.4 +1.7 43.3 18th 24.5 +1.1 19.2 24th 12.8 22.2 average 58%
Warmun 40.2 +1.5 43.5 28th 24.1 +1.1 17.4 25th 12.8 23.4 average 55%
West Kimberley (district 03)
Bidyadanga 37.0 +2.7 44.5 30th 22.9 +1.8 19.5 2nd 8.6 1.2 v high 717%
Broome Airport 35.0 +2.1 43.4 30th 24.7 +2.3 18.9 1st 1.0 1.4 high 71%
Curtin Aero 39.9 +1.0 44.0 19th 23.3 +1.5 18.9 30th 30.0 7.5 v high 400%
Cygnet Bay 35.5 +1.3 37.6 19th     19.5 2nd 0 1.6 lowest 0%
Derby Aero 39.4 +2.2 44.8 30th 24.5 +1.3 19.6 30th 3.4 2.8 high 121%
Fitzroy Crossing Aero 41.5 +1.5 44.6 20th 24.3 +1.3 20.3 23rd 10.2 16.2 average 63%
De Grey (district 04)
Bedout Island 31.6   37.4 30th 24.4   22.4 1st
Karratha Aero 34.1 0.0 40.5 26th 21.1 +0.3 15.3 1st 0 0.4 lowest 0%
Legendre Island 30.7   37.3 24th 22.6   19.4 1st
Mandora 37.7 +1.7 44.6 31st 21.2 +2.1 15.4 29th 0.2 1.2 high 17%
Marble Bar 39.6 +0.8 44.4 21st 23.0 +1.3 17.6 2nd 0.4 3.5 average 11%
Pardoo Station       21.1 +1.5 15.5 1st 0 0.9 lowest 0%
Port Hedland Airport 36.5 +1.5 44.0 20th 20.3 +1.7 15.0 1st 0 1.0 lowest 0%
Roebourne Aero 37.3 -0.2 43.5 26th 19.8 -0.1 14.7 1st 0 1.7 v low 0%
Fortescue (district 05)
Barrow Island Airport 29.2 -0.4 36.5 31st 21.7 -0.1 17.3 1st 0 2.0 v low 0%
Mardie 34.8 -0.2 43.1 21st 18.1 +0.6 13.3 1st 0 0.8 lowest 0%
Onslow Airport 33.3 +0.4 41.3 21st 18.9 +1.0 15.9 1st 0 0.8 lowest 0%
Thevenard Island 29.6 -0.1 37.5 31st 20.5 -0.2 16.0 1st 0 1.2 lowest 0%
Wittenoom 37.3 +1.8 41.6 21st 21.9 +1.0 15.5 6th 0.6 3.9 average 15%
West Gascoyne (district 06)
Carnarvon Airport 26.7 +0.6 35.9 20th 17.0 +0.6 13.6 2nd 2.6 5.0 average 52%
Denham 25.3 -0.4 36.5 20th 16.8 +0.1 12.5 8th 0.2 5.9 low 3%
Murchison 30.9 +0.1 39.3 31st 14.1 +0.7 9.7 11th 0 4.6 lowest 0%
Shark Bay Airport 28.2 -0.2 37.7 20th 15.2 -0.1 11.5 11th 0.6 4.2 average 14%
East Gascoyne (district 07)
Newman Aero 35.2 0.0 38.8 21st 17.7 -0.1 11.2 8th 30.8 5.9 v high 522%
Paraburdoo Aero 36.2 +0.3 41.7 21st 18.4 +0.1 13.7 7th 2.6 4.1 average 63%
Murchison (district 07A)
Meekatharra Airport 31.2 +1.4 37.8 21st 15.4 +0.1 10.2 6th 0 6.1 lowest 0%
Mount Magnet Aero 29.5 0.0 36.6 31st 14.0 -0.5 8.7 8th 1.8 6.1 average 30%
Paynes Find     36.7 31st 11.8 +0.3 5.1 8th 2.0 10.4 low 19%
North Coast (district 08)
Dalwallinu 25.7 -0.8 35.3 31st 9.5 -0.2 4.8 11th 13.8 13.3 high 104%
Geraldton Airport 25.5   37.5 20th 11.6   6.1 9th 6.6
Kalbarri 26.7 +0.4 37.9 20th 13.0 +0.4 7.6 7th 5.9 13.8 average 43%
Morawa Airport 28.0 -0.3 37.9 31st 11.5 +0.4 7.5 9th 6.4 8.7 average 74%
Mullewa 28.2 +0.9 38.0 31st 12.5 +1.3 8.3 8th 2.7 12.8 low 21%
Wongan Hills 25.2 -0.1 35.3 31st 10.0 -0.1 4.5 9th 18.4 19.6 average 94%
Central Coast (district 09)
Badgingarra Research Stn 24.0 -0.5 33.1 31st 10.0 +0.6 3.6 11th 0 27.2 lowest 0%
Bickley 20.3 -0.9 28.5 13th 9.6 -0.1 5.0 4th 83.8 65.8 high 127%
Gingin Aero 23.9 -0.5 31.3 13th 9.4 +0.2 1.9 9th 23.0 35.1 low 66%
Jandakot Aero 22.8 -0.1 30.8 13th 10.6 +0.9 4.3 6th 39.8 46.2 average 86%
Lancelin 22.1 -0.5 33.5 20th 12.2 +0.2 5.2 4th 18.1 28.2 low 64%
Medina Research Centre 23.2 +0.4 32.0 13th 11.2 +0.8 4.4 9th 23.5 39.0 low 60%
Millendon (Swan Valley) 23.9   31.3 13th 10.3   3.8 9th 30.4
Pearce RAAF 23.5 0.0 31.3 31st 10.6 +0.5 3.5 9th 26.2 35.9 average 73%
Perth Airport 23.2 +0.5 31.4 13th 10.8 +0.5 3.9 9th 25.6 43.3 low 59%
Perth Metro 23.1 -0.3 31.0 13th 11.9 +0.4 5.8 9th 42.0 51.5 average 85%
Rottnest Island 20.7 +0.2 28.4 21st 14.0 0.0 9.8 4th 14.8 28.7 low 52%
Swanbourne 21.9 -0.4 31.2 13th 12.9 +0.5 7.7 4th 26.4 42.7 low 62%
South Coast (district 09A)
Albany 19.1 +0.6 24.1 16th 11.5 +1.0 7.4 9th 54.2 78.5 low 69%
Albany Airport 19.8   25.7 14th 9.7   4.1 9th 51.6
Bridgetown 19.6 -0.9 26.4 14th 7.4 +0.3 1.0 4th 51.6 43.3 average 119%
Bunbury 21.1 0.0 30.1 21st 10.0 +0.5 2.7 9th 28.4 31.9 average 89%
Busselton Aero 20.7 -0.6 28.8 21st 9.1 +0.5 2.3 9th 23.8 29.9 average 80%
Cape Leeuwin 18.7 +0.5 26.4 22nd 13.2 +0.6 10.0 7th 40.6 64.1 low 63%
Cape Naturaliste 20.0 +1.1 27.6 21st 11.5 +0.5 6.1 4th 26.4 49.0 low 54%
Collie East 21.0 -0.7 28.7 13th 7.4 -0.1 0.4 9th 41.8 40.9 average 102%
Donnybrook 21.9 +0.7 28.5 21st 9.3 +0.9 3.6 4th 61.9 62.8 average 99%
Dwellingup 20.3 +0.2 28.4 13th 8.7 +0.7 2.8 9th 79.4 79.0 average 101%
Esperance 21.5 +0.3 31.2 16th 11.1 +0.3 6.0 6th 32.6 46.5 average 70%
Esperance Aero 22.5 +1.0 33.4 15th 9.5 -0.3 4.3 9th 31.0 46.3 average 67%
Jarrahwood 20.8 0.0 27.5 21st 7.4 -0.1 -0.2 9th 54.4 56.1 average 97%
Mandurah 21.5 -0.4 31.1 13th 13.4 0.0 8.8 5th 25.0 30.1 average 83%
Manjimup 19.8 +0.9 28.3 14th 8.8 +0.5 4.0 9th 54.0 74.9 average 72%
North Walpole 19.2 +0.2 27.7 14th 10.3 -0.2 6.1 9th 116.0 79.6 high 146%
Rocky Gully 19.4 +0.1 26.5 15th 8.5 +0.4 3.4 9th 43.6 54.7 average 80%
Shannon 18.5 -0.3 26.8 14th 8.8 +0.5 2.9 9th 64.8 75.6 average 86%
Witchcliffe 19.5 -0.1 28.1 21st 9.9 +0.6 4.5 9th 58.2 61.7 average 94%
North Central (district 10)
Bencubbin 24.6 -0.6 33.1 13th 10.3 +0.5 4.5 8th 16.6 15.5 average 107%
Cunderdin Airfield 25.4 -0.7 34.7 31st 7.9 -0.2 -0.2 9th 29.4 17.9 high 164%
Merredin 24.9 -0.1 34.0 31st 10.1 +0.4 2.9 8th 22.6 18.4 average 123%
Northam 24.6 +0.5 33.4 31st 8.5 -0.4 2.0 6th 10.4 24.5 low 42%
York       6.8 -0.4 0.2 6th 14.8 22.7 average 65%
South Central (district 10A)
Beverley 24.7 +0.2 34.0 31st 8.0 0.0 1.6 6th 12.0 23.3 low 52%
Brookton 23.8 +0.4 31.9 13th 7.6 +0.1 1.2 8th 22.0 25.2 average 87%
Corrigin 24.0 +0.7 32.7 31st 8.3 +0.1 1.4 9th
Hyden 24.4 -0.5 32.1 13th 8.3 0.0 2.6 8th 26.1 21.6 average 121%
Jacup 22.4 +0.5 32.4 15th 7.3 -0.4 2.9 19th 33.4 39.7 average 84%
Katanning 21.2 -0.7 29.1 15th 8.4 +0.9 2.8 9th 30.8 30.8 average 100%
Lake Grace 23.0 -0.4 30.8 15th 9.3 +0.3 4.0 11th 17.8 26.6 average 67%
Narembeen 25.2 +0.1 33.9 31st 9.2 +0.1 3.8 9th 27.1 19.2 high 141%
Narrogin 21.8 +0.6 29.8 13th 8.1 +0.6 1.9 9th 42.0 30.9 high 136%
Newdegate Research Station 23.4 -0.1 31.0 15th 7.5 +0.6 1.0 9th 26.2 23.7 average 111%
Ongerup 21.5 +0.2 30.4 15th 8.5 +0.3 3.4 19th 22.8 33.2 average 69%
Pingelly 23.2 +0.8 30.6 31st 8.0 -0.4 2.0 11th 2.6 24.6 v low 11%
Ravensthorpe 22.3 -0.2 29.3 21st 9.2 +0.1 4.0 9th 32.6 38.0 average 86%
Wagin 22.0 0.0 29.9 13th 8.0 +0.1 1.5 9th 27.5 28.9 average 95%
Wandering 21.7 -0.7 29.0 21st 6.7 +0.4 0.5 9th 38.6 28.3 high 136%
Eucla (district 11)
Eucla 24.8 +1.7 37.7 16th 12.1 +0.8 5.4 12th 18.2 18.2 average 100%
Eyre 26.1 +2.9 42.2 16th 10.0 -0.1 -1.2 12th 3.4 19.2 low 18%
Forrest 28.4 +0.9 38.6 23rd 11.4 +0.8 5.1 1st 7.6 9.9 average 77%
Red Rocks Point 23.8 +0.8 40.2 16th 12.4 +0.2 6.1 12th 1.8 16.5 v low 11%
South East (district 12)
Bulga Downs 30.0 -0.5 37.0 22nd 12.7 -1.3 6.2 6th 5.2 8.2 average 63%
Kalgoorlie-Boulder Airport 26.7 +0.8 32.9 16th 11.7 +0.5 4.2 6th
Laverton Aero 29.6 +1.0 38.3 16th 14.1 -0.2 7.4 8th 12.0 13.6 average 88%
Leinster Aero 30.0 0.0 36.3 15th 14.2 -0.8 8.3 1st 15.0 12.4 high 121%
Leonora Aero 29.4 -1.0 36.6 15th 13.6 -1.9 7.5 8th 12.8 11.1 high 115%
Munglinup West 23.2 -0.3 33.9 15th 8.5 -0.9 4.0 8th 32.8 39.5 average 83%
Norseman Aero 25.8 -0.2 33.6 31st 8.8 -0.7 1.9 8th 9.2 21.2 low 43%
Salmon Gums Res.Stn. 24.2 +0.7 33.4 15th 7.7 +0.1 -0.2 9th 16.6 27.4 average 61%
Southern Cross Airfield 25.9 -0.7 34.0 31st 9.4 0.0 2.5 8th 5.2 15.8 low 33%
North East (district 13)
Carnegie 32.8 -0.3 38.3 16th 16.8 +0.3 10.6 6th 53.3 6.5 v high 820%
Giles Meteorological Office 32.4 +0.6 39.1 26th 18.4 +1.2 12.4 1st 52.4 15.8 high 332%
Telfer Aero 38.2 +1.0 42.1 26th 23.1 +2.1 15.2 1st 13.6 3.1 v high 439%
Warburton Airfield 32.9 +1.0 39.0 25th 17.5 +1.8 11.6 1st 11.6 14.2 average 82%
Wiluna     38.5 22nd 14.3 +0.4 9.0 13th 10.7 7.3 high 147%
Offshore Islands (district 200)
Browse Island 30.0   32.4 13th 27.3   26.5 1st
Varanus Island 28.7 -0.6 34.3 31st 22.5 -0.1 20.7 1st 0 1.0 v low 0%
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.
From 2017 on, information about Cocos and Christmas Islands can be found in the climate summary for the Remote Islands and Antarctica

Notes

The Monthly climate summary, generally published on the first working day of each month, 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This statement has been prepared based on information available at 10 am on Wednesday 1 November 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
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