Western Australia in January 2017: Wet overall, cool days in the north and east

January 2017 was the third-wettest for Western Australia; the wettest January since 2006. Throughout the month, tropical low pressure systems with embedded thunderstorms brought persistent and locally heavy rainfall to northern and inland WA. Across the south, a cloudband towards the end of the month contributed significantly to above average rainfall totals near the west coast and in the northern half of the South West Land Division. Daytime temperatures were below average in the north and east, with below average night-time temperatures in the southwest of the State.

Above average rainfall across most of Western Australia

  • January rainfall across WA was 129% above average, the third highest January rainfall, behind 1942 and the record set in 2006
  • Most of the State recorded above average rainfall, although parts of the southern South West Land Division recorded below average rainfall
  • Highest on record monthly rainfall occurred across the east Kimberley, and parts of the Northern and Southern Interior, east Pilbara and northern Goldfields
  • Record high monthly rainfall totals were also recorded in the southwest Gascoyne, Central West, and Central Wheat Belt as a result of a significant cloudband late in the month
  • Several sites in the east Kimberley recorded their highest January daily rainfall on record on the 4th as a tropical low moved through the region, whilst significant thunderstorm activity brought record high daily totals to the northern Goldfields on the 17th, and east Pilbara on the 19th, and another tropical low brought further record high daily totals to parts of the east Kimberley on the 24th and 25th
  • A number of sites across the southwest Gascoyne and northern South West Land Division registered record high daily rainfall totals between the 29th and 31st as a result of the cloudband in the region
  • Throughout the month, minor flooding occurred in the Kimberley District and along the Fitzroy, Ord and De Grey Rivers, across the Interior Districts, and along the Irwin River in the Central West

Cool days over the north and east, cool nights in the southwest

  • Below average daytime temperatures were recorded across most of the north and east, with 42% of Western Australia recording temperatures in the lowest decile (the bottom 10% of records)
  • Above average daytime temperatures were recorded across parts of the southwest
  • Averaged across WA as a whole, maximum temperatures were below average and the lowest for five years, since 2012
  • Telfer Aero recorded its lowest January mean daily maximum temperature on record
  • A number of sites in the Lower West and adjacent parts recorded their coldest January day on record on the 30th as a result of a persistent cloudband and rainfall over the region
  • Night-time temperatures were below average in the eastern Pilbara and adjoining parts of the Interior districts as well as across the Lower Southwest (southwest of a line between Jurien Bay and Bremer Bay), which recorded its coolest January since 1969
  • Minima were above average throughout eastern parts of southern Western Australia, through inland parts to the northwest coast and in the northern Kimberley
  • A few sites in southern WA recorded their lowest January temperature on record, with Warmun in the north equalling its record
  • Rocky Gully and York recorded their lowest January mean daily minimum temperature on record, and few sites in the southwest recorded their coolest January in at least 20 years.
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    Extremes in January 2017
    Hottest day 46.6 °C at Gascoyne Junction on the 4th
    Warmest days on average 40.8 °C at Emu Creek Station
    Coolest days on average 22.1 °C at Albany
    Coldest day 17.1 °C at Brookton on the 30th
    17.1 °C at Corrigin on the 30th
    Coldest night 2.5 °C at Eyre on the 25th
    Coolest nights on average 10.9 °C at Rocky Gully
    Warmest nights on average 27.3 °C at Bedout Island
    Warmest night 31.6 °C at Mount Magnet Aero on the 28th
    Warmest on average overall 33.1 °C at Paraburdoo Aero
    Coolest on average overall 18.3 °C at North Walpole
    Wettest overall 751.4 mm at El Questro
    Wettest day 179.5 mm at Kingston Rest on the 4th
    Strongest wind gust 109 km/h at Legendre Island on the 28th

    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

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    Record highest January daily rainfall
    New record
    (mm)
    Old
    record
    Years of
    record
    Northampton 55.2 on the 30th 53.3 on the 21st in 1916 126
    New Norcia 70.4 on the 29th 68.0 on the 13th in 2006 120
    Moningarin 75.6 on the 30th 69.3 on the 21st in 1916 107
    Ogilvie 63.4 on the 30th 58.2 on the 21st in 1916 104
    Yorkrakine 140.0 on the 29th 64.3 on the 29th in 1990 98
    Koorda 53.0 on the 31st 52.8 on the 30th in 1968 95
    Howatharra 67.0 on the 30th 48.0 on the 28th in 1990 89
    Nanyanine 61.0 on the 29th 56.0 on the 23rd in 2000 78
    Shackleton 65.2 on the 31st 38.4 on the 27th in 1968 75
    Muresk Institute 60.0 on the 31st 54.4 on the 22nd in 1952 66
    Highfields 84.0 on the 30th 74.8 on the 29th in 1990 58
    Wyndham 143.2 on the 4th 134.5 on the 28th in 1998 49
    Lake Argyle Resort 144.2 on the 24th 130.0 on the 26th in 1982 48
    Telfer Aero 134.8 on the 19th 65.0 on the 4th in 2007 44
    Kingston Rest 179.5 on the 4th 110.0 on the 2nd in 2004 39
    Wundi 47.8 on the 30th 47.0 on the 2nd in 1974 39
    Eurardy 60.2 on the 30th 46.8 on the 21st in 2001 32
    Wyndham Aero 137.2 on the 4th 117.0 on the 12th in 1974 32
    Diggers Rest 150.0 on the 4th 95.0 on the 25th in 2006 25
    Kachana 153.0 on the 25th 141.8 on the 17th in 2014 23
    Laverton Aero 98.8 on the 17th 89.6 on the 4th in 2007 23
    Home Valley 160.0 on the 4th 110.8 on the 25th in 2006 22
    Steep Point 24.0 on the 30th 23.0 on the 3rd in 2011 21
    Dalwallinu 63.4 on the 30th 42.0 on the 13th in 2006 20



    Record highest January total rainfall
    New record
    (mm)
    Old
    record
    Years of
    record
    Average for
    January
    Bonney Downs 414.2 401.0 in 1917 111 69.9
    Cowcowing 111.7 104.4 in 2000 110 14.7
    Carlton Hill 702.4 623.6 in 1962 107 213.0
    Ogilvie 77.8 69.9 in 1916 107 9.9
    Yorkrakine 189.0 130.4 in 2000 102 15.7
    South Holmwood 97.6 75.6 in 2006 96 12.1
    Shackleton 95.6 87.2 in 1990 75 12.9
    Carnegie 188.0 162.9 in 1967 62 33.4
    Wyndham 537.4 434.7 in 2006 49 191.1
    Lake Argyle Resort 605.8 416.6 in 1982 46 203.7
    Kununurra Aero 591.6 358.8 in 2014 45 209.6
    Telfer Aero 382.4 173.0 in 2014 44 60.6
    Wyndham Aero 528.2 525.2 in 1962 34 198.0
    El Questro 751.4 640.9 in 1984 33 231.1
    Kachana 600.4 371.2 in 2014 23 220.2
    Laverton Aero 177.2 134.8 in 2000 23 49.1
    Diggers Rest 556.1 443.4 in 1984 22 202.0
    Steep Point 42.0 38.6 in 2011 21 6.0

    Highest January total rainfall for at least 20 years
    Observed
    (mm)
    Most recent
    higher
    Average for
    January
    Mullewa 87.4 91.9 in 1896* 13.5
    Northampton 67.6 72.4 in 1916 7.2
    Ruby Plains 439.0 574.8 in 1926* 130.8
    Warmun 461.2 612.6 in 1959* 181.5
    Riverside 62.9 70.3 in 1963* 11.0
    Yaringa Station 70.8 124.2 in 1967* 11.1
    Beebyn 146.7 236.5 in 1915* 31.2
    Kalbarri 30.8 43.0 in 1974 5.4
    Gibb River 417.8 419.3 in 1986 194.0
    Kingston Rest 378.0 379.2 in 1986* 183.3
    Coolangatta 61.0 66.0 in 1990 12.0
    Howatharra 72.0 87.0 in 1990 6.7
    Jurien Bay 49.0 91.6 in 1990 7.6
    Lancelin 87.6 101.4 in 1990 10.8
    Nabawa 40.0 54.6 in 1990 7.2
    Useless Loop 33.6 38.0 in 1990 4.1
    Wundi 56.8 61.0 in 1990 9.2
    Ygnattering 104.0 106.2 in 1990 15.3
    Eradu 43.0 54.4 in 1990* 9.7
    Eurardy 64.0 75.3 in 1990* 16.5
    Highfields 93.8 113.6 in 1990* 13.5
    Sandsprings 35.4 109.0 in 1990* 9.1
    Yulmbu 365.6 397.6 in 1986* 181.4
    Coorow 79.6 98.7 in 1995 12.9

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




    Record lowest January daily maximum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    January
    Perth Airport 19.7 on the 30th 20.1 on the 3rd in 2007 73 31.8
    Lancelin 19.6 on the 30th = 19.6 on the 13th in 1988 51 29.2
    Brookton 17.1 on the 30th 17.6 on the 22nd in 2000 50 33.0
    Beverley 17.4 on the 30th 18.0 on the 22nd in 2000 47 34.3
    Swanbourne 19.5 on the 30th 20.4 on the 3rd in 2007 24 30.0
    Cunderdin Airfield 18.0 on the 30th 18.1 on the 3rd in 2007 21 34.8
    Gingin Aero 19.1 on the 30th 20.1 on the 3rd in 2007 21 33.2



    Record lowest January mean daily maximum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    January
    Telfer Aero 35.8 36.3 in 2000 42 40.4

    Lowest January mean daily maximum temperature for at least 20 years
    Observed
    (°C)
    Most recent
    lower
    Average for
    January
    Warmun 33.8 33.6 in 1984 37.2
    Argyle Aerodrome 33.9 33.5 in 1997 36.5
    Curtin Aero 33.7 33.0 in 1997 36.4



    Record highest January daily minimum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    January
    Murchison 31.2 on the 28th = 31.2 on the 19th in 1991 27 22.5



    Record lowest January temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    January
    Warmun 19.0 on the 25th = 19.0 on the 9th in 2014 55 24.8
    Eyre 2.5 on the 25th 2.8 on the 6th in 1991 29 15.3
    Cunderdin Airfield 8.5 on the 6th 9.3 on the 5th in 2007 21 17.4
    York 7.5 on the 13th 7.8 on the 25th in 2001 21 16.6



    Record lowest January mean daily minimum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    January
    Rocky Gully 10.9 11.0 in 2003 21 12.8
    York 14.2 14.9 in 2007 20 16.6

    Lowest January mean daily minimum temperature for at least 20 years
    Observed
    (°C)
    Most recent
    lower
    Average for
    January
    Beverley 14.9 14.7 in 1987* 16.4
    Wagin 13.5 12.8 in 1994 14.6
    Albany 14.6 14.2 in 1960* 15.2

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




    Lowest January mean temperature for at least 20 years
    Observed
    (°C)
    Most recent
    lower
    Average for
    January
    Argyle Aerodrome 29.4 28.9 in 1997 31.1



    Summary statistics for January 2017
    Maximum temperatures
    (°C)
    Minimum temperatures
    (°C)
    Rainfall
    (millimetres)
    Mean for
    January
    2017
    Diff
    from
    average
    Highest for
    January
    2017
    Mean for
    January
    2017
    Diff
    from
    average
    Lowest for
    January
    2017
    Total for
    January
    2017
    Average
    for
    January
    Rank of
    January
    2017
    Fraction of
    January
    average
    North Kimberley (district 01)
    Doongan 31.7 -1.5 34.5 1st 22.9 +0.1 17.9 20th 556.2 302.8 v high 184%
    Kalumburu 33.4 -0.5 36.8 10th 25.0 +0.4 23.4 21st 363.4 306.6 high 119%
    Troughton Island 31.3 -0.5 32.9 13th 26.9 +0.5 23.7 4th 323.6 264.1 average 123%
    Truscott 31.5 -0.7 33.0 10th 25.9 +0.6 23.1 25th 268.4 307.6 average 87%
    Wyndham Aero 34.4 -2.1 37.2 8th 25.7 -0.6 23.3 24th 528.2 198.0 highest 267%
    East Kimberley (district 02)
    Argyle Aerodrome 33.9 -2.6 36.9 30th 24.9 -0.8 23.1 18th 243.8 161.0 high 151%
    Halls Creek Airport 32.8   36.3 30th 23.6   20.7 25th
    Kununurra Aero 33.6 -2.3 36.9 8th 24.9 -0.2 22.6 16th 591.6 209.6 highest 282%
    Warmun 33.8 -3.4 37.0 9th 24.6 -0.2 19.0 25th 461.2 181.5 v high 254%
    West Kimberley (district 03)
    Bidyadanga 33.4 -1.0 42.0 3rd 26.6 +0.6 23.2 6th 107.2 127.5 average 84%
    Broome Airport 32.8 -0.5 38.6 3rd 27.0 +0.7 23.3 6th 221.4 181.6 high 122%
    Curtin Aero 33.7 -2.7 38.4 3rd 25.0 0.0 22.9 19th 2.6 212.3 lowest 1%
    Cygnet Bay 32.5 -1.2 36.6 3rd 25.6 0.0 22.8 6th 268.4 238.9 average 112%
    Derby Aero 33.6 -1.7 38.7 3rd 25.8 +0.1 23.3 26th 192.8 196.6 average 98%
    Fitzroy Crossing Aero 34.6 -3.0 40.0 3rd 24.9 -0.3 22.8 10th 295.0 182.5 v high 162%
    De Grey (district 04)
    Bedout Island 33.1   35.6 5th 27.3   25.7 28th
    Karratha Aero 34.3 -1.7 43.0 5th 26.3 -0.4 23.3 15th 130.4 49.1 high 266%
    Legendre Island 32.0   35.5 5th 25.9   23.6 15th
    Mandora 34.4 -1.6 45.4 4th 25.9 +0.5 23.3 3rd 150.2 84.4 high 178%
    Marble Bar 37.8 -3.1 45.5 4th 25.4 -1.2 23.2 12th 220.0 94.8 high 232%
    Port Hedland Airport 34.9 -1.5 44.4 5th 26.6 +1.0 24.9 14th 92.0 63.2 high 146%
    Roebourne Aero 37.1 -1.6 45.5 5th 25.7 -0.5 23.6 14th 91.4 77.5 average 118%
    Fortescue (district 05)
    Barrow Island Airport 32.3 -0.9 36.7 1st 25.2 -0.6 23.3 19th 89.8 25.8 high 348%
    Learmonth Airport 37.5 -0.4 43.9 1st 23.4 +0.4 18.9 13th 10.0 31.2 average 32%
    Mardie 35.6 -2.3 46.3 6th 25.5 +0.5 21.9 19th 0 38.1 lowest 0%
    Onslow Airport 35.4 -1.0 45.7 5th 24.5 +0.1 20.9 22nd 42.6 39.0 high 109%
    Wittenoom 37.1 -2.4 43.0 5th 25.6 -0.4 22.6 19th 137.0 114.4 high 120%
    West Gascoyne (district 06)
    Carnarvon Airport 32.2 +0.9 42.7 26th 22.4 -0.2 18.2 13th 12.0 11.9 high 101%
    Denham 30.9 +0.2 42.0 26th 21.7 -0.4 17.0 7th 20.4 7.6 high 268%
    Emu Creek Station 40.8 -0.3 46.5 5th 25.1 +0.6 20.7 22nd 7.7 46.7 low 16%
    Murchison 39.0 -0.3 44.8 5th 23.2 +0.7 16.2 23rd 46.9 21.2 high 221%
    Shark Bay Airport 34.8 +0.9 44.0 26th 21.1 -0.5 16.3 13th 19.0 9.3 high 204%
    East Gascoyne (district 07)
    Newman Aero 36.0 -3.1 41.8 4th 24.6 -0.4 20.0 14th 150.4 67.5 high 223%
    Paraburdoo Aero 39.3 -1.4 44.1 5th 26.9 +1.0 23.3 19th 34.6 54.2 average 64%
    Murchison (district 07A)
    Meekatharra Airport 38.0 -0.3 43.6 5th 24.8 +0.4 19.5 13th 37.4 29.6 high 126%
    Mount Magnet Aero 38.5 +0.6 45.1 5th 24.1 +0.6 16.4 23rd 16.0 27.1 average 59%
    Paynes Find 37.8 +0.5 44.2 27th 21.1 +0.1 13.5 13th 36.6 20.1 high 182%
    North Coast (district 08)
    Dalwallinu 35.1 -0.2 43.0 4th 17.4 -0.8 11.2 13th 72.8 25.4 high 287%
    Geraldton Airport 32.7   44.2 26th 17.1   12.6 1st 31.2
    Kalbarri 33.1 -0.1 41.5 2nd 19.8 +0.2 15.0 13th 30.8 5.4 v high 570%
    Morawa Airport 38.6 +1.3 45.0 27th     12.7 13th 3.2 23.0 average 14%
    Mullewa 37.6 +0.8 44.4 4th 20.4 +0.9 13.2 13th 87.4 13.5 v high 647%
    North Island 27.4 -0.2 37.5 26th 20.6 -0.8 18.3 13th 1.0 2.7 average 37%
    Wongan Hills 35.1 +0.5 43.8 4th 17.3 -0.6 11.5 6th 63.0 15.2 v high 414%
    Central Coast (district 09)
    Badgingarra Research Stn 34.4 -0.3 44.5 28th 16.9 -0.2 10.6 13th 29.6 10.5 high 282%
    Bickley 30.8 +0.2 41.0 4th 15.1 -0.3 8.8 13th 10.8 17.7 average 61%
    Garden Island HSF 26.2 -1.4 38.4 26th 18.4 -0.7 14.8 13th 14.0 10.8 average 130%
    Gingin Aero 32.5 -0.7 43.6 4th 14.9 -1.7 8.0 13th 69.2 17.7 high 391%
    Gosnells City 32.7 -0.5 42.5 4th 17.7 -0.9 12.0 7th 24.3 11.7 high 208%
    Jandakot Aero 30.9 -0.5 41.7 26th 16.0 -0.9 8.0 13th 18.6 14.3 high 130%
    Jurien Bay 30.4 +0.4 40.8 26th 16.7 -0.6 11.8 13th 49.0 7.6 v high 645%
    Karnet     40.2 4th 14.9 -0.5 9.0 23rd 17.8 17.1 high 104%
    Lancelin 27.8 -1.4 40.5 26th 16.8 -0.8 13.2 24th 87.6 10.8 v high 811%
    Pearce RAAF 33.9 +0.4 44.5 4th 15.4 -1.6 9.1 23rd 54.6 9.7 v high 563%
    Perth Airport 32.0 +0.2 43.3 4th 16.3 -0.8 8.0 13th 36.0 10.0 v high 360%
    Perth Metro 31.0 -0.2 42.0 26th 16.8 -1.4 11.5 13th 45.4 16.7 high 272%
    Rottnest Island 25.9 -0.7 39.3 26th 18.5 -0.6 15.7 13th 11.2 12.0 average 93%
    Swanbourne 28.6 -1.4 40.1 26th 17.7 -0.6 12.8 13th 33.8 15.5 high 218%
    South Coast (district 09A)
    Albany 22.1 -0.7 28.2 26th 14.6 -0.6 9.8 24th 3.6 23.9 v low 15%
    Albany Airport 25.1   39.4 26th 12.0   6.1 24th 4.4
    Bunbury 29.6 -0.2 39.0 4th 14.2 -1.3 8.7 14th 0.2 12.0 low 2%
    Busselton Aero 30.5 +0.3 38.3 4th 12.7 -1.7 8.1 8th 0.6 12.9 average 5%
    Cape Leeuwin 22.8 -0.3 25.6 26th 16.6 -0.4 12.9 24th 3.6 16.3 low 22%
    Cape Naturaliste 25.8 +0.3 34.7 26th 14.5 -0.7 10.7 24th 1.0 10.8 low 9%
    Collie East 31.5 +0.7 40.4 4th 12.3 -1.3 7.3 20th 0.4 19.3 low 2%
    Donnybrook 32.1 +1.5 41.5 4th 14.2 +0.1 9.8 6th 0.8 12.6 low 6%
    Dwellingup 31.1 +1.4 40.7 4th 14.2 -0.1 8.4 13th 1.4 15.4 low 9%
    Esperance 26.8 +0.6 42.6 5th 15.4 -0.3 9.7 24th 28.8 27.1 high 106%
    Esperance Aero 29.4 +1.6 43.0 5th 14.7 -0.2 9.9 14th 41.2 27.9 high 148%
    Hopetoun North 26.8 +1.5 44.9 5th 14.6 -0.6 8.8 25th 4.4 38.8 low 11%
    Jarrahwood 31.1 +1.4 39.8 4th 11.5 -1.2 5.0 24th 4.0 16.7 average 24%
    Mandurah 29.0 -0.5 37.4 26th 18.4 -0.6 14.8 13th 3.4 15.4 average 22%
    Manjimup 28.6 +1.4 39.7 4th 12.0 -1.1 8.0 24th 4.6 20.0 low 23%
    North Walpole 23.8 -0.7 30.3 26th 12.8 -1.9 8.2 24th 12.6 29.0 average 43%
    Rocky Gully 28.3 +0.8 40.2 4th 10.9 -1.9 5.1 1st 3.8 19.8 v low 19%
    Shannon 26.7 +0.1 38.9 4th 11.8 -1.1 6.4 24th 9.4 15.9 average 59%
    Witchcliffe 26.3 -0.3 35.7 26th 12.9 -1.1 7.0 24th 4.6 10.0 average 46%
    North Central (district 10)
    Bencubbin 34.4 -0.1 42.6 5th 18.3 +0.1 12.9 6th 52.2 17.1 v high 305%
    Cunderdin Airfield 34.7 -0.1 44.4 28th 15.7 -1.7 8.5 6th 69.6 25.4 high 274%
    Northam 34.2 0.0 45.0 28th 16.2 -1.0 10.7 13th 130.1 11.6 v high 1122%
    York 34.5 +0.3 43.7 4th 14.2 -2.4 7.5 13th 67.5 30.2 high 224%
    South Central (district 10A)
    Beverley 34.4 +0.1 43.0 4th 14.9 -1.5 9.0 13th 53.8 12.6 v high 427%
    Brookton 33.5 +0.5 42.8 4th 14.8 -0.8 8.5 13th 37.7 13.3 high 283%
    Corrigin 33.8 +1.2 42.0 28th 14.9 -1.0 10.6 13th 24.8 17.3 high 143%
    Hyden 34.2 +0.5 44.2 5th 14.6 -1.0 8.9 23rd 77.2 20.4 v high 378%
    Jacup 29.9 +2.1 43.3 5th 12.3 -0.9 6.1 20th 3.4 33.3 low 10%
    Katanning 31.2 +1.1 40.3 4th 12.2 -1.6 7.6 20th 0.2 23.6 v low 1%
    Lake Grace 32.0 +0.9 42.0 5th 14.5 -0.9 9.6 24th 20.6 37.7 average 55%
    Narembeen 34.4 +0.4 42.4 28th 16.0 -0.6 11.2 13th 67.5 17.6 v high 384%
    Narrogin 32.0 +1.0 40.7 11th 14.1 -0.1 9.8 23rd 1.6 12.9 average 12%
    Newdegate Research Station 32.5 +1.4 43.7 5th 12.3 -1.7 6.3 24th 28.4 19.5 high 146%
    Ongerup 30.4 +1.7 41.0 5th 13.2 -0.7 8.4 20th 5.4 19.2 average 28%
    Ravensthorpe 29.8 +0.8 43.0 5th 14.2 +0.1 7.0 24th 13.4 24.9 average 54%
    Wagin 32.7 +1.6 41.1 4th 13.5 -1.1 8.6 21st 0.2 12.8 low 2%
    Wandering 32.6 +0.4 42.4 4th 12.7 -1.6 5.4 13th 9.6 17.4 average 55%
    Eucla (district 11)
    Balladonia 32.9 +1.6 41.0 27th 15.0 +0.3 9.0 24th 16.1 20.1 average 80%
    Eucla 27.2 +1.4 43.0 16th 17.6 +0.9 13.8 15th 50.0 15.4 v high 325%
    Eyre 27.4 +0.9 40.6 29th 14.5 -0.8 2.5 25th 35.4 17.4 high 203%
    Forrest 31.5 -1.6 43.9 6th 17.2 +0.9 12.0 25th 31.8 24.7 high 129%
    Red Rocks Point 25.3 +0.3 35.4 27th 18.2 -0.1 12.9 25th 32.0 26.1 high 123%
    South East (district 12)
    Bulga Downs 38.1 +0.4 43.5 5th 22.8 +0.4 18.7 13th 11.6 30.3 average 38%
    Kalgoorlie-Boulder Airport 33.4 -0.3 40.6 27th 18.9 +0.6 13.8 1st 83.2 27.5 high 303%
    Laverton Aero 34.9 -0.6 41.7 16th 20.7 -0.8 14.9 18th 177.2 49.1 highest 361%
    Leinster Aero 36.8 -0.4 41.9 5th 23.0 -0.2 16.4 18th 16.8 40.0 average 42%
    Leonora Aero 36.4   42.1 22nd 22.2   16.9 18th 94.8 49.4 high 192%
    Munglinup West 30.4 +1.6 44.2 5th 13.9 -0.7 8.0 24th 22.6 43.9 average 51%
    Norseman Aero 32.8 +0.4 41.6 27th 15.5 -0.4 8.7 24th 30.2 38.4 average 79%
    Salmon Gums Res.Stn. 31.2 +0.6 41.6 5th 13.3 -0.6 4.4 24th 43.8 26.7 high 164%
    Southern Cross Airfield 34.4 -0.3 44.6 5th 17.8 -0.1 12.9 1st 72.8 32.6 high 223%
    Yeelirrie 37.2 -0.7 43.0 5th 23.3 +1.0 18.5 18th 84.6 30.2 high 280%
    North East (district 13)
    Carnegie 35.2 -3.6 42.1 5th 23.3 -0.7 18.2 9th 188.0 33.4 highest 563%
    Giles Meteorological Office 35.2 -2.1 39.0 31st 23.5 0.0 19.9 15th 102.4 31.7 v high 323%
    Telfer Aero 35.8 -4.6 43.4 4th 24.7 -1.3 21.2 7th 382.4 60.6 highest 631%
    Warburton Airfield 35.0 -2.9 41.0 5th 23.3 +0.3 19.5 14th 159.6 30.8 v high 518%
    Wiluna 37.1 -0.9 42.0 5th 24.3 +1.4 18.0 18th 44.1 37.0 high 119%
    Offshore Islands (district 200)
    Adele Island 30.7   32.3 2nd     24.0 26th
    Browse Island 29.6   31.1 16th 27.0   23.7 5th
    Christmas Island Aero 28.2 +0.2 29.5 20th 22.9 +0.2 20.4 17th 310.4 297.2 average 104%
    Cocos Island Airport 30.1 +0.4 31.4 27th 24.8 -0.1 22.4 14th 38.4 162.1 low 24%
    Rowley Shoals 29.0   29.9 5th     23.9 26th
    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 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 1 pm on Wednesday 1 February 2017. 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.

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

    Further information

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