Western Australia in 2019: a very dry year with record warm temperatures

2019 was the warmest year and second-driest on record for Western Australia. For each month of the year, the State mean maximum temperature was above average, and record warm in January, July, September, November and December. Monthly rainfall was below average for all months for WA, and record dry in spring. Severe tropical cyclone Veronica produced heavy rainfall along the Pilbara coast and adjacent inland in late March.

Dry across most of WA

  • Annual rainfall was 49% below average for WA and the second-driest year on record and driest since 1924
  • Severe tropical cyclone Veronica brought heavy rainfall to the Pilbara coast in late March, including Indee which received 263 mm in 24 hours on the 25th, and 634 mm over the 3-day period to the 26th, about twice of its normal annual rainfall
  • The rain from Veronica ensured areas near the Pilbara coast and adjacent inland had above average annual rain
  • Monthly rainfall was below average for all months for WA as a whole, and amongst top five driest in May, September and November
  • Marble Bar recorded its highest daily rainfall on record with 138 mm on 25 March in 20 years of record, though Marble Bar Comparison had higher daily totals and the highest was 304.8 mm in 2 March 1941
  • The driest locations were in central and inland southeastern WA with annual rainfall less than 50 mm; an annual total of 46.2 mm at Giles was its second-driest year on record and driest since 1961
  • Several sites in the north, central and southeast of the State either had their driest year on record or driest for several decade
  • The wettest locations were in the Perth hills and along the State's far southwest with annual rainfall of 900 mm-1050 mm; Northcliffe recorded the highest annual total of the year at 1055.6 mm

Record warm daytime temperatures for most of WA

  • 2019 was Western Australia's warmest year on record, with the State mean temperature 1.67 °C above average and half a degree warmer than the previous record in 2013
  • Days were particularly warm, with the State mean maximum temperature being the highest on record at 2.50 °C above average and a degree warmer than the previous record in 2014
  • Almost the entire State saw record high mean maximum temperatures, and numerous sites had their warmest year on record, with several sites' observations going back more than 50 years
  • The State mean maximum temperature was above average in every month, and record warm in January, July, September, November and December
  • Monthly high temperature records were broken at numerous sites in March, April, August, November and December
  • Several all-time high temperature records were reported in early January and December in the north and southeast of the State
  • Eucla on the State's southeast border with observations going back to 1910, recorded its highest temperature at 49.8 °C on 19 December, which was also the State's equal second-highest temperature on record
  • A maximum temperature of 49.5 °C at Forrest (north of Eucla) on 19 December was the State's sixth-highest temperature on record; Marble Bar and Red Rock Point (west of Eucla) recorded the State's equal tenth-highest temperature at 49.1 °C on 13 and 23 January respectively
  • Eyre (west of Eucla) had broken its previous annual temperature record twice in January (48.5 °C on the 2nd and 48.2 °C on the 24th)
  • May was very cold in the south, with monthly low temperature records at several sites
  • Nights in the far north were relatively cool from August to November
  • Despite the cold nights, the State's annual mean minimum temperatures was 0.83 °C above average, the third-warmest on record
  • There was widespread frost in southern WA from 5 to 7 September; Esperance Aero had its lowest temperature in 29 years of record

Further information

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Extremes in 2019
Hottest day 49.8 °C at Eucla on 19 Dec
49.5 °C at Forrest on 19 Dec
49.1 °C at Marble Bar on 13 Jan
49.1 °C at Red Rocks Point on 23 Jan
Warmest days on average 38.0 °C at Fitzroy Crossing Aero
Coolest days on average 19.9 °C at Albany
Coldest day 9.2 °C at Rocky Gully on 19 Apr
Coldest night -6.2 °C at Eyre on 20 Jun
Coolest nights on average 8.2 °C at Bridgetown
8.2 °C at Collie East
8.2 °C at Wandering
Warmest nights on average 25.7 °C at Troughton Island
Warmest night 35.1 °C at Telfer Aero on 29 Dec
Warmest on average overall 29.7 °C at Argyle Aerodrome
Coolest on average overall 15.2 °C at Shannon
Wettest overall 1055.6 mm at Northcliffe
Driest overall 33.2 mm at Cunyu
Wettest day 263.4 mm at Indee on 25 Mar
Strongest wind gust 154 km/h at Roebourne Aero on 24 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
Marble Bar 138.0 on 25 Mar 132.8 on 1 Mar 2009 20



Record lowest annual total rainfall
New record
(mm)
Old
record
Years of
record
Annual
average
Mundrabilla Station 85.3 117.2 in 1933 105 246.8
Riverside 148.4 166.6 in 1954 84 300.3
Mount Madden 183.8 192.3 in 1972 81 350.6
Neds Creek 40.0 52.4 in 1967 72 235.6
Lorna Glen 69.5 86.4 in 1976 69 262.4
Windrush 472.9 477.0 in 2006 54 666.8
Erinair 325.1 326.7 in 1994 50 550.6
Lort River 172.4 196.4 in 1994 47 355.5
Telfer Aero 65.4 113.8 in 1991 46 364.2
Tawarri West 159.8 183.1 in 1979 38 302.4
Prenti Downs 30.5 36.7 in 1989 34 205.2
Drysdale River Station 541.7 643.8 in 1991 26 1074.8
Laverton Aero 60.2 118.6 in 2005 25 293.1
Forrest 34.0 88.4 in 2012 24 219.4
Leinster Aero 139.8 = 139.8 in 2009 24 259.3
Cunyu 33.2 91.5 in 2005 21 248.5
Fitzroy Crossing Aero 250.0 306.8 in 2018 21 680.4

Lowest annual total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Annual
average
Barberton 257.0 214.0 in 1914* 448.0
Watheroo 210.0 181.1 in 1914* 412.7
Brunswick Junction 619.8 609.2 in 1940* 989.9
Wiluna 97.3 80.0 in 1950* 260.4
Eyre 176.3 132.5 in 1913* 314.6
Giles Meteorological Office 46.2 38.0 in 1961 289.4
Salmon Gums Res.Stn. 201.0 188.7 in 1957* 354.8
Bidyadanga 163.4 144.5 in 1959* 513.5
Edjudina 56.0 55.5 in 1944* 221.7
Sturt Creek 146.5 121.0 in 1964* 412.2
Munarra 86.8 61.0 in 1977* 227.1
Red Hill 173.7 159.7 in 1969* 362.8
Turee Creek 81.7 58.0 in 1977* 250.1
Gibb River 432.4 378.7 in 1970* 789.4
Kirkalocka 109.4 106.9 in 1977* 239.8
Coolgardie 137.3 126.1 in 1972* 269.6
Paraburdoo Aero 121.0 102.6 in 1976* 317.8
Murchison Downs 129.6 95.9 in 1979* 223.0
Warburton Airfield 37.6 34.9 in 1961* 243.7
Yarrabubba 111.8 88.1 in 1979* 206.3
Carnegie 68.6 52.2 in 1989 239.5
Dumbleyung 266.2 263.6 in 1979* 392.9
Charnley River 506.3 67.1 in 1976* 969.8
Mount Hart Station 496.9 341.9 in 1929* 1013.3
Boscabel 377.8 372.4 in 1987* 518.7
Broome Airport 320.2 132.0 in 1992 624.2
Karara 168.8 150.1 in 1938* 307.4
Kununurra Aero 470.8 439.4 in 1992 832.7
Adina 550.2 486.0 in 1994 713.5
Cue 126.6 89.5 in 1991* 233.0
Kilto Station 433.7 313.1 in 1965* 768.6
Meekatharra Airport 85.6 77.4 in 1994 235.8
Mount Amhurst 237.8 167.4 in 1964* 501.4
Mukinbudin 203.7 202.2 in 1979* 285.2
Pleasant Valley 379.4 305.0 in 1994* 551.5
Warmun 470.9 393.9 in 1992* 721.9
Wyndham 462.2 458.6 in 1992* 824.2
Newman Aero 115.8 36.6 in 1996 324.3
Curtin Aero 494.8 397.2 in 1995* 813.1
Cygnet Bay 310.5 170.2 in 1992* 781.0
Fossil Downs 355.9 233.2 in 1992* 541.1
Napier Downs 519.7 488.6 in 1994* 775.3
Ruby Plains 211.2 148.2 in 1992* 454.0
Wyndham Aero 520.8 456.6 in 1972* 843.0
Esperance Aero 424.2 325.2 in 1994* 569.8
The Duke 447.6 388.6 in 1994* 626.5
Karawa 202.6 185.6 in 1994* 332.9
Mettler 408.0 379.4 in 1994* 602.6
Munglinup 332.6 297.6 in 1994* 525.3

* 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
Eucla 49.8 on 19 Dec 49.3 on 17 Dec 1912 109 22.7
Giles Meteorological Office 46.8 on 25 Dec 45.7 on 16 Jan 2013 64 29.4
Eyre 48.5 on 2 Jan 47.7 on 2 Jan 2013 37 23.0
Carnegie 47.8 on 15 Jan 47.7 on 8 Jan 2013 31 30.6
Curtin Aero 46.8 on 18 Dec 46.7 on 21 Dec 2018 29 35.5
Forrest 49.5 on 19 Dec 48.4 on 30 Jan 2011 27 26.3
Mount Elizabeth 42.1 on 8 Dec 41.5 on 30 Nov 2009 27 32.4
Fitzroy Crossing Aero 47.4 on 18 Dec 46.7 on 25 Dec 2018 23 36.1
Norseman Aero 46.5 on 13 Jan 45.6 on 28 Jan 2011 21 25.1
North Island 39.4 on 13 Dec 39.1 on 6 Mar 2007 20 24.8



Record highest annual mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Broome Airport 33.7 33.3 in 2016 79 32.2
Dwellingup 23.7 = 23.7 in 2015 79 21.9
Perth Airport 26.2 26.1 in 2011 74 24.5
Port Hedland Airport 35.0 34.8 in 2014 70 33.3
Meekatharra Airport 31.9 30.6 in 1994 67 29.0
Mullewa 30.0 29.7 in 2002 67 28.0
Salmon Gums Res.Stn. 25.3 24.9 in 2014 67 23.5
Giles Meteorological Office 32.3 30.9 in 2018 62 29.4
Pearce RAAF 27.0 26.8 in 2015 55 25.2
Eyre 25.3 24.9 in 2013 53 23.0
Merredin 27.0 26.7 in 2014 53 25.1
Ravensthorpe 24.1 = 24.1 in 1994 52 22.8
Brookton 25.7 25.6 in 1972 50 24.3
Onslow Airport 33.9 33.1 in 2007 50 32.0
Mandora 35.9 35.2 in 1994 49 34.1
Wongan Hills 27.6 26.9 in 2010 48 25.8
Learmonth Airport 33.9 33.1 in 1994 43 31.9
Hyden 27.1 26.5 in 2010 42 25.1
Telfer Aero 36.4 35.5 in 2005 41 34.2
Warburton Airfield 32.6 31.4 in 2005 39 29.9
Curtin Aero 36.9 36.7 in 2016 27 35.5
Laverton Aero 29.9 28.7 in 2013 27 27.1
Bickley 23.4 = 23.4 in 2010 25 22.6
Forrest 28.2 27.9 in 2013 25 26.3
Karratha Aero 33.8 33.1 in 2014 25 32.5
Perth Metro 25.7 = 25.7 in 2011 25 24.7
Argyle Aerodrome 36.4 36.1 in 2016 24 34.8
Jacup 23.3 23.2 in 2014 24 22.0
Leinster Aero 30.6 29.6 in 2005 24 28.2
Mount Magnet Aero 30.7 29.8 in 2013 23 28.6
Cunderdin Airfield 27.4 27.2 in 2015 22 26.0
Gingin Aero 26.7 26.3 in 2015 22 25.5
Newman Aero 34.3 33.4 in 2005 22 32.1
Paraburdoo Aero 35.7 34.6 in 2010 22 33.5
Dalwallinu 27.9 27.1 in 2014 21 26.3
Fitzroy Crossing Aero 38.0 37.2 in 2005 21 36.1
Lake Grace 24.8 24.3 in 2015 21 23.6
Morawa Airport 29.9 29.1 in 2013 21 28.2
Newdegate Research Station 24.7 24.6 in 2015 21 23.5
Wandering 24.8 24.7 in 2015 20 23.7

Highest annual mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Annual
average
Badgingarra Research Stn 27.3 27.5 in 1978* 25.9
Bencubbin 27.0 27.4 in 1994* 25.4

* 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
Broome Airport 30.9 on 1 Dec 30.7 on 24 Dec 2005 81 21.3
Meekatharra Airport 33.0 on 15 Jan 32.9 on 3 Jan 2004 70 15.9
Giles Meteorological Office 32.1 on 26 Dec = 32.1 on 3 Jan 1990 64 15.9
Bidyadanga 33.0 on 15 Mar 31.5 on 22 Feb 1977 63 20.9
Hyden 26.5 on 13 Jan = 26.5 on 2 Feb 2012 49 10.0
Telfer Aero 35.1 on 29 Dec 33.7 on 25 Dec 2018 46 19.5
Warburton Airfield 32.8 on 29 Dec 32.5 on 17 Jan 2013 35 14.9
Curtin Aero 32.9 on 1 Dec 30.5 on 9 Dec 2016 29 21.0
Kalumburu 29.7 on 28 Dec 29.3 on 13 Dec 2018 22 20.4
Marble Bar 34.5 on 19 Dec 34.2 on 21 Jan 2008 20 20.4



Record lowest temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Esperance Aero 1.9 on 6 Sep 2.2 on 19 Jul 2004 29 11.3



Record highest annual mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Meekatharra Airport 17.8 17.1 in 1998 67 15.9
Warburton Airfield 16.9 = 16.9 in 2015 35 14.9
Laverton Aero 15.4 15.0 in 2013 27 14.0
Leinster Aero 15.7 15.6 in 2005 24 14.7
Mount Magnet Aero 16.3 16.0 in 2015 23 15.2
Newman Aero 18.0 17.7 in 2010 22 16.4
Thevenard Island 22.4 = 22.4 in 2013 20 21.8

Highest annual mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Annual
average
Giles Meteorological Office 17.0 17.3 in 1998 15.9



Record highest annual mean temperature
New record
(°C)
Old
record
Years of
record
Annual
average
Meekatharra Airport 24.8 23.6 in 1991 67 22.5
Giles Meteorological Office 24.6 24.0 in 1996 62 22.7
Eyre 17.8 17.7 in 2013 53 16.9
Merredin 19.6 = 19.6 in 2014 53 18.3
Onslow Airport 27.2 26.6 in 2013 50 25.6
Wongan Hills 19.7 = 19.7 in 2015 48 18.9
Learmonth Airport 25.8 25.5 in 2010 43 24.8
Telfer Aero 28.7 28.2 in 1991 41 26.8
Warburton Airfield 24.7 23.9 in 2015 35 22.4
Laverton Aero 22.7 21.8 in 2013 27 20.5
Karratha Aero 27.8 27.4 in 2016 25 26.7
Mount Magnet Aero 23.5 22.8 in 2014 23 21.9
Newman Aero 26.2 25.2 in 2010 22 24.2
Paraburdoo Aero 27.6 27.1 in 2010 22 25.9
Fitzroy Crossing Aero 29.4 29.2 in 2016 21 28.2



Summary statistics for 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean
for
2019
Diff
from
average
Highest
for
2019
Mean
for
2019
Diff
from
average
Lowest
for
2019
Total
for
2019
Average
annual
total
Rank
of
2019
Fraction
of annual
average
North Kimberley (district 01)
Troughton Island 31.4 +0.3 35.5 28 Dec 25.7 +0.2 17.2 12 May 598.8 804.7 low 74%
Truscott 33.2 +0.5 39.0 11 Oct 23.0 -0.1 13.1 25 Jun 686.6 1094.6 v low 63%
Wyndham Aero 37.2 +1.2 45.5 7 Dec 22.1 -0.2 8.6 15 Aug 520.8 843.0 v low 62%
East Kimberley (district 02)
Argyle Aerodrome 36.4 +1.6 44.6 17 Dec 23.0 +0.8 12.0 25 Jun 471.8 734.0 low 64%
Halls Creek Airport 35.5   45.0 18 Dec 19.6   6.2 15 Aug 316.2
Kununurra Aero 36.3 +1.3 44.7 6 Dec 20.4 -0.8 7.6 15 Aug 470.8 832.7 v low 57%
Warmun 35.7 +0.7 45.0 17 Dec     8.0 15 Aug 470.9 721.9 low 65%
West Kimberley (district 03)
Broome Airport 33.7 +1.5 44.6 23 Nov 21.5 +0.2 8.5 16 Jul 320.2 624.2 low 51%
Curtin Aero 36.9 +1.4 46.8 18 Dec 21.0 0.0 9.4 7 Jul 494.8 813.1 v low 61%
Cygnet Bay 33.3 +0.9 39.6 24 Dec 21.4 +0.4 10.8 24 Aug 310.5 781.0 v low 40%
Derby Aero 36.1 +1.5 45.4 18 Dec 21.5 0.0 10.1 8 Jun 418.8 696.6 low 60%
Fitzroy Crossing Aero 38.0 +1.9 47.4 18 Dec 20.9 +0.7 8.1 4 Jun 250.0 680.4 lowest 37%
De Grey (district 04)
Karratha Aero 33.8 +1.3 46.2 19 Dec 21.8 +0.9 8.0 12 Jun 110.4 292.4 low 38%
Mandora 35.9 +1.8 47.1 14 Nov 19.8 +0.4 7.0 3 Sep 117.6 377.9 v low 31%
Marble Bar 37.2 +1.6 49.1 13 Jan 20.6 +0.2 7.2 7 Jun 372.6 392.7 average 95%
Port Hedland Airport 35.0 +1.7 47.0 10 Mar 20.2 +0.7 8.5 16 Jul 439.2 319.3 high 138%
Roebourne Aero 36.0 +1.1 48.1 10 Mar 20.1 +0.3 6.3 12 Jun
Fortescue (district 05)
Barrow Island Airport 30.3 +1.0 42.4 27 Dec 22.4 +0.1 13.6 10 Aug 83.8 275.8 v low 30%
Karijini North 35.4   47.5 13 Jan 20.9   6.0 9 Aug 210.0
Learmonth Airport 33.9 +2.0 47.9 29 Dec 17.7 0.0 6.4 11 Aug 173.4 253.5 average 68%
Onslow Airport 33.9 +1.9 47.2 10 Mar 20.4 +1.3 10.0 18 Jul 135.2 308.4 low 44%
Thevenard Island 30.9 +1.1 44.0 24 Feb 22.4 +0.6 12.8 2 Jul 147.4 231.2 average 64%
West Gascoyne (district 06)
Carnarvon Airport 28.5 +1.2 45.3 27 Jan 17.5 +0.3 6.0 20 Aug
Shark Bay Airport 29.8 +0.7 46.8 20 Jan 16.3 -0.1 4.5 18 May 73.0 201.5 v low 36%
East Gascoyne (district 07)
Newman Aero 34.3 +2.2 46.1 2 Jan 18.0 +1.6 0.1 30 Jun 115.8 324.3 v low 36%
Paraburdoo Aero 35.7 +2.2 46.4 31 Dec 19.5 +1.3 3.3 12 Jun 121.0 317.8 v low 38%
Murchison (district 07A)
Meekatharra Airport 31.9 +2.9 46.0 12 Jan 17.8 +1.9 3.0 29 Jun 85.6 235.8 v low 36%
Mount Magnet Aero 30.7 +2.1 46.1 12 Jan 16.3 +1.1 1.6 30 Jun 147.0 251.2 v low 59%
North Coast (district 08)
Dalwallinu 27.9 +1.6 43.8 21 Jan 11.4 -0.3 -0.1 6 Sep 186.6 284.5 v low 66%
Geraldton Airport 27.4   45.1 20 Jan 13.5   1.1 18 May
Kalbarri 28.6 +0.9 44.0 27 Jan 15.2 +0.5 2.5 30 Jun 206.7 338.7 v low 61%
Morawa Airport 29.9 +1.7 45.0 16 Nov 12.8 -0.1 0.0 18 May 190.6 283.4 low 67%
Mullewa 30.0 +2.0 44.3 20 Jan 13.9 +0.6 2.2 16 Aug 192.9 332.3 v low 58%
North Island 24.8 0.0 39.4 13 Dec 18.6 0.0 8.0 12 Aug 209.2 270.0 low 77%
Wongan Hills 27.6 +1.8 43.2 15 Dec 11.8 -0.2 1.8 24 Aug 276.3 387.3 low 71%
Central Coast (district 09)
Badgingarra Research Stn 27.3 +1.4 44.0 20 Jan 12.3 +0.4 3.3 18 Aug 296.2 534.6 v low 55%
Bickley 23.4 +0.8 40.4 20 Jan 11.4 +0.1 2.4 5 Sep 957.4 1080.4 low 89%
Garden Island HSF 22.8 +0.1 38.3 13 Dec 15.0 0.0 7.1 18 Jun 506.2 598.0 low 85%
Gingin Aero 26.7 +1.2 44.1 20 Jan 10.6 -0.4 -2.2 18 May 526.8 620.7 low 85%
Jandakot Aero 25.5 +0.9 42.0 20 Jan 11.8 +0.3 -0.1 19 May 638.0 819.6 v low 78%
Jurien Bay 25.8 +0.9 42.6 13 Dec 13.2 +0.1 2.6 22 Aug 365.7 545.1 v low 67%
Lancelin 24.5 +0.3 41.0 12 Dec 13.2 -0.4 3.0 20 Sep 511.6 602.2 low 85%
Millendon (Swan Valley) 26.5   43.9 20 Jan 11.9   0.5 18 May 526.8
Pearce RAAF 27.0 +1.8 44.4 20 Jan 12.1 -0.1 -0.3 18 May 502.4 652.1 low 77%
Perth Airport 26.2 +1.7 42.9 20 Jan 12.3 +0.1 1.5 18 May 524.6 762.1 v low 69%
Perth Metro 25.7 +1.0 42.1 20 Jan 12.8 0.0 1.6 19 May
Rottnest Island 22.6 +0.4 37.9 13 Dec 15.8 +0.1 8.5 28 Jun 466.8 568.7 low 82%
Swanbourne 24.1 0.0 40.0 9 Nov 14.3 +0.3 4.6 19 Jun 595.4 728.2 v low 82%
South Coast (district 09A)
Albany 19.9 +0.4 31.4 15 Dec 12.7 +0.9 4.0 6 Sep 648.7 925.1 v low 70%
Bridgetown 23.3 +0.9 40.4 20 Jan 8.2 -0.4 -1.7 6 Sep
Busselton Aero 23.7 +0.6 38.7 14 Dec 10.2 -0.1 1.1 24 Aug 548.8 677.6 low 81%
Cape Leeuwin 20.3 +0.5 33.4 6 Dec 14.6 +0.5 8.0 28 Jun 694.6 956.8 v low 73%
Cape Naturaliste 22.3 +1.6 36.0 14 Dec 12.8 +0.1 4.6 5 Sep 519.4 798.3 v low 65%
Collie East 24.3 +1.1 40.5 20 Jan 8.2 -0.3 -2.3 3 Jun
Dwellingup 23.7 +1.8 39.9 20 Jan 10.0 +0.4 -0.7 19 May 886.8 1228.7 v low 72%
Esperance 22.6 +0.7 41.8 21 Jan 12.3 +0.2 3.3 26 Aug
Esperance Aero 23.5 +1.2 43.4 21 Jan 11.3 0.0 1.9 6 Sep 424.2 569.8 v low 74%
Hopetoun North 22.0 -0.1 38.5 10 Nov 11.8 +0.3 1.4 6 Sep 304.0 487.3 v low 62%
Mandurah 23.7 +0.4 39.5 12 Dec 14.7 -0.1 5.4 5 Sep 517.0 656.7 low 79%
Manjimup 22.1 +1.6 40.4 20 Jan 9.9 +0.2 1.3 5 Sep 676.4 986.8 v low 69%
North Walpole 20.5 +0.3 37.3 6 Dec 11.4 -0.3 4.9 19 May 963.0 1071.8 average 90%
Rocky Gully 21.6 +0.7 41.8 20 Jan 9.5 -0.1 1.1 6 Sep 612.8 710.2 low 86%
Shannon 20.8 +0.4 38.2 6 Dec 9.5 -0.2 0.3 6 Sep 954.6 1007.3 average 95%
Witchcliffe 21.5 +0.1 37.4 13 Dec 10.5 -0.2 1.7 6 Sep 880.6 951.7 average 93%
North Central (district 10)
Bencubbin 27.0 +1.6 44.0 21 Jan     -0.5 19 May 182.5 314.3 v low 58%
Cunderdin Airfield 27.4 +1.4 44.7 15 Dec 10.2 -0.3 -1.3 7 Sep 209.4 302.2 v low 69%
Merredin 27.0 +1.9 44.2 21 Jan 12.2 +0.8 -0.5 19 May 218.4 325.2 v low 67%
York     44.2 20 Jan 9.3 -0.3 -2.2 19 May 309.2 393.3 low 79%
South Central (district 10A)
Brookton 25.7 +1.4 43.1 20 Jan 9.7 0.0 -1.0 20 Sep 278.9 449.2 v low 62%
Hyden 27.1 +2.0 45.8 21 Jan 9.8 -0.2 -2.5 19 Jun 202.5 340.3 v low 60%
Jacup 23.3 +1.3 42.9 20 Jan 9.2 -0.1 -0.8 6 Sep 278.6 442.6 v low 63%
Katanning 23.3 +0.8 42.2 20 Jan 9.4 -0.2 0.8 20 Jun 331.0 446.0 v low 74%
Lake Grace 24.8 +1.2 42.8 21 Jan 10.2 -0.2 -1.6 5 Sep 191.6 337.2 v low 57%
Newdegate Research Station 24.7 +1.2 43.6 21 Jan     -3.5 6 Sep 209.4 367.5 v low 57%
Ravensthorpe 24.1 +1.3 42.2 26 Dec     0.5 6 Sep
Wandering 24.8 +1.1 43.0 20 Jan 8.2 -0.4 -2.5 3 Jun 481.0 508.1 low 95%
Eucla (district 11)
Eucla 24.7 +2.0 49.8 19 Dec 12.6 +0.4 1.1 20 Aug
Eyre 25.3 +2.3 48.5 2 Jan 10.4 -0.3 -6.2 20 Jun 176.3 314.6 v low 56%
Forrest 28.2 +1.9 49.5 19 Dec 11.1 +0.1 -0.9 6 Jun 34.0 219.4 lowest 15%
Red Rocks Point 23.4 +0.9 49.1 23 Jan 13.2 0.0 1.7 9 Jul 28.8 332.5 v low 9%
South East (district 12)
Laverton Aero 29.9 +2.8 46.9 13 Jan 15.4 +1.4 -0.9 1 Jul 60.2 293.1 lowest 21%
Leinster Aero 30.6 +2.4 46.9 13 Jan 15.7 +1.0 0.4 29 Jun 139.8 259.3 lowest 54%
Leonora Aero 30.2 +2.1 46.9 13 Jan 15.3 +0.9 -0.3 19 May 87.8 264.7 v low 33%
Munglinup West 24.1 +0.9 43.4 26 Dec 10.3 -0.3 0.1 6 Sep 252.8 450.8 v low 56%
Norseman Aero 26.6 +1.5 46.5 13 Jan 10.0 +0.1 -4.9 20 Jun 210.4 293.7 v low 72%
Salmon Gums Res.Stn. 25.3 +1.8 45.0 17 Nov 9.1 0.0 -5.5 6 Sep 201.0 354.8 v low 57%
North East (district 13)
Giles Meteorological Office 32.3 +2.9 46.8 25 Dec 17.0 +1.1 1.4 30 Jun 46.2 289.4 v low 16%
Telfer Aero 36.4 +2.2 47.9 27 Dec 20.9 +1.4 5.9 6 Jun 65.4 364.2 lowest 18%
Warburton Airfield 32.6 +2.7 47.2 15 Jan 16.9 +2.0 -1.1 30 Jun 37.6 243.7 v low 15%
Wiluna Aero 32.1   47.1 13 Jan 16.0   -1.9 30 Jun 69.8
Offshore Islands (district 200)
Adele Island 30.5   34.8 23 Dec 26.0   21.2 16 Jul
Browse Island 29.9   34.3 19 Dec 26.8   21.8 2 Jan

Notes

The Annual climate summary, generally published on the second working day of the year, 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 11 am on Tuesday 7 January 2020. 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.

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