Friday, 8 January 2021 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0
Western Australia in December 2020: wet and cool in the north and east, warm in the west
It was very wet and cool December in the north and east of Western Australia as a result of passage of a number of tropical lows. Rainfall was below average in parts of the state's south although December is typically a dry month. Mean maximum temperatures were above average in the west of the state. Mean minimum temperatures were above average for much of the west and particularly warm along the Pilbara coast, in contrast to below average minima in the Kimberley and Northern Interior districts. For the state as a whole, it was the fourth-wettest December on record and coolest December overall since 2008.
Wet in the north and east
- December rainfall was about twice (194%) the 1961-1990 average, and it was the fourth-wettest December on record for Western Australia.
- Rainfall was well above average in the north and east of the state, due to a number of tropical lows; several sites in the Kimberley and Pilbara had their wettest December on record or wettest December for at least 20 years.
- A tropical low (02U) crossed the Pilbara coast west of Port Headland on the 11th then tracked across the state's interior and southeast the following day, producing widespread moderate to heavy rainfall in excess of 50 mm, and up to 160 mm, along its passage.
- Another tropical low (03U) crossed the west Kimberley coast on the 20th then tracked eastward through the Kimberley and into the Northern Territory; sites in the southeast Kimberley recorded the second wet spell of the month between the 20th and 24th, in addition to a wet spell between the 7th and 11th.
Daytime temperatures below average in the north and east, above average in the west
- The mean temperature was 0.17 °C below the 1961-1990 average, the coolest December since 2008 for Western Australia.
- Mean maximum temperatures were below average in the north and east of the state, including several sites in the Kimberley and Pillar either had their coolest December on record or coolest December for at least 20 years.
- In contrast, mean maximum temperatures were above average in the west of the state, resulting in a statewide averaged mean maximum temperature of 0.54 °C below the 1961-1990 average, the lowest since 2007.
- Mean minimum temperatures were below average in parts of the Kimberley and Northern Interior districts, in contrast to above average mean minima in much of the western half of the state, particularly along the Pilbara coast.
- The statewide averaged mean minimum temperature was 0.18 °C below the 1961-1990 average, the lowest since 2008.
- The first morning of the month was the coldest near the west coast, with overnight temperatures dipped to 2 °C, including several sites with their record low December temperature.
- The tropical low (02U) brought unseasonably low maximum temperatures in the Kimberley and Pilbara with temperatures reached the mid-20s between the 8th and 11th, including a number of record low December maximum temperatures.
- Carnarvon Airport recorded 45.6 °C on the 21st, its highest December temperature on record and the state's highest temperature of the month, however this was the lowest Western Australia highest December maximum temperature since December 2001.
- Halls Creek Airport in the southeast Kimberley recorded a maximum temperature of 21.9 °C on the 22nd, which was one and a half degree lower than previous lowest December maximum temperature record, that was 23.6 °C recorded at the old Halls Creek Meteorolocal Office site in 14 December 1971.
- It was a scorching Christmas Day in the state's southwest, with temperatures at numerous locations over 40 °C; several sites around Perth and the adjacent Central Wheat Belt district recorded 3 consecutive days of 40 °C between 23rd and 25th, and Mora Airport and Mullewa in the Central West district had 5 consecutive days of 40 °C.
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Extremes Maps Records Summaries Important notes the top
Extremes in December 2020 | |
---|---|
Hottest day | 45.6 °C at Carnarvon Airport on the 21st |
Warmest days on average | 40.0 °C at Paraburdoo Aero |
Coolest days on average | 21.1 °C at Albany |
Coldest day | 16.2 °C at Shannon on the 1st |
Coldest night | 1.4 °C at Eyre on the 2nd |
Coolest nights on average |
10.8 °C at Jacup 10.8 °C at Rocky Gully |
Warmest nights on average | 27.0 °C at Bedout Island |
Warmest night | 30.7 °C at Telfer Aero on the 17th |
Warmest on average overall | 32.7 °C at Paraburdoo Aero |
Coolest on average overall | 17.0 °C at Windy Harbour |
Wettest overall | 695.6 mm at Cygnet Bay |
Wettest day | 191.0 mm at Cygnet Bay on the 21st |
Strongest wind gust | 135 km/h at Troughton Island on the 15th |
Extremes Maps Records Summaries Important notes the top
Maps | |||
---|---|---|---|
Observed | Anomaly | Decile rank | |
Total rainfall |
|||
Mean daily maximum temperatures |
|||
Mean daily minimum temperatures |
Click on a map to show it full size in a pop-up window
Record highest December daily rainfall | ||||||
---|---|---|---|---|---|---|
New record (mm) |
Old record |
Years of record |
||||
Warburton Airfield | 83.0 | on the 12th | 60.7 | on the 31st in 1947 | 62 | |
Tjukayirla | 74.2 | on the 12th | 49.0 | on the 17th in 2007 | 21 | |
Varanus Island | 67.6 | on the 11th | 15.6 | on the 31st in 2013 | 21 |
Record highest December total rainfall | |||||
---|---|---|---|---|---|
New record (mm) |
Old record |
Years of record |
Average for December |
||
Ruby Plains | 331.4 | 243.5 | in 1930 | 77 | 79.7 |
Derby Aero | 436.8 | 350.6 | in 2016 | 66 | 83.4 |
Mount Amhurst | 306.8 | 270.6 | in 1930 | 65 | 79.8 |
Cygnet Bay | 695.6 | 621.7 | in 2017 | 55 | 98.8 |
Flora Valley | 341.0 | 204.0 | in 1998 | 43 | 100.4 |
Port Smith | 552.2 | 512.6 | in 2016 | 42 | 75.5 |
Sophie Downs | 305.2 | 215.0 | in 1999 | 37 | 99.6 |
Curtin Aero | 343.0 | 337.2 | in 2016 | 27 | 155.3 |
Billiluna | 309.8 | 211.0 | in 1998 | 26 | 85.1 |
Marble Bar | 199.4 | 122.8 | in 2013 | 21 | 37.7 |
Varanus Island | 72.6 | 24.8 | in 2010 | 21 | 5.8 |
Mount Winifred | 330.8 | 237.4 | in 2016 | 20 | 116.2 |
Highest December total rainfall for at least 20 years | |||||
---|---|---|---|---|---|
Observed (mm) |
Most recent higher |
Average for December |
|||
Sturt Creek | 254.0 | 292.4 | in 1906* | 66.4 | |
Meda | 308.4 | 396.2 | in 1920* | 90.1 | |
Bonney Downs | 212.8 | 296.0 | in 1975 | 35.1 | |
Indee | 152.0 | 367.0 | in 1975* | 24.5 | |
Gibb River | 331.0 | 354.0 | in 1987 | 126.2 | |
Mardie | 89.8 | 171.3 | in 1988 | 9.4 | |
Mundrabilla Station | 107.6 | 165.4 | in 1994 | 19.7 | |
Red Hill | 85.9 | 111.6 | in 1998 | 22.0 | |
Coolawanyah | 169.8 | 238.6 | in 1999 | 36.7 | |
Emu Creek Station | 100.1 | 106.3 | in 1998* | 14.0 | |
Mount Florance | 170.8 | 274.2 | in 1999* | 32.5 |
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported
Record highest December temperature | ||||||
---|---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
|||
Carnarvon Airport | 45.6 | on the 21st | 45.4 | on the 27th in 1976 | 75 | 29.4 |
Denham | 44.1 | on the 21st | 42.8 | on the 23rd in 2018 | 33 | 29.3 |
Windy Harbour | 36.2 | on the 10th | = 36.2 | on the 27th in 2000 | 33 | 21.9 |
Record lowest December daily maximum temperature | ||||||
---|---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
|||
Telfer Aero | 24.8 | on the 9th | 25.0 | on the 17th in 1993 | 47 | 40.4 |
Cygnet Bay | 26.0 | on the 8th | 26.9 | on the 15th in 1993 | 35 | 34.9 |
Derby Aero | 26.2 | on the 9th | 26.4 | on the 18th in 2009 | 35 | 37.3 |
Curtin Aero | 25.2 | on the 9th | 25.4 | on the 27th in 2017 | 30 | 38.5 |
Marble Bar | 27.6 | on the 11th | 27.8 | on the 30th in 2013 | 21 | 42.0 |
Record lowest December mean daily maximum temperature | |||||
---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
||
Derby Aero | 34.4 | 34.7 | in 1998 | 34 | 37.3 |
Kununurra Aero | 34.9 | 35.0 | in 1998 | 34 | 37.4 |
Curtin Aero | 35.2 | 35.5 | in 1998 | 29 | 38.5 |
Fitzroy Crossing Aero | 35.2 | 36.1 | in 1998 | 23 | 39.4 |
Marble Bar | 38.9 | 39.8 | in 2001 | 20 | 42.0 |
Wyndham Aero | 35.5 | 35.9 | in 2008 | 20 | 38.2 |
Lowest December mean daily maximum temperature for at least 20 years | |||||
---|---|---|---|---|---|
Observed (°C) |
Most recent lower |
Average for December |
|||
Telfer Aero | 37.8 | 36.5 | in 1995 | 40.4 | |
Doongan | 32.6 | 32.0 | in 2000 | 34.6 | |
Kalumburu | 33.6 | 33.5 | in 2000 | 35.6 | |
Troughton Island | 32.0 | 31.5 | in 2000 | 33.0 | |
Warmun | 36.2 | 35.6 | in 2000 | 38.4 |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
Record lowest December temperature | ||||||
---|---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
|||
Brookton | 3.0 | on the 1st | = 3.0 | on the 13th in 1984 | 54 | 13.5 |
Wongan Hills | 6.8 | on the 1st | 7.3 | on the 2nd in 1998 | 54 | 15.8 |
Pingelly | 4.5 | on the 1st | = 4.5 | on the 10th in 1984 | 49 | 13.9 |
Goomalling | 5.5 | on the 1st | 6.6 | on the 6th in 2007 | 41 | 14.9 |
Gosnells City | 8.0 | on the 1st | = 8.0 | on the 2nd in 2002 | 29 | 16.4 |
Perth Metro | 6.6 | on the 1st | 7.9 | on the 7th in 2007 | 27 | 16.4 |
Gingin Aero | 2.2 | on the 1st | 4.4 | on the 7th in 2007 | 25 | 14.4 |
Lake Grace | 5.2 | on the 1st | 6.0 | on the 1st in 2005 | 24 | 13.6 |
Record lowest December mean daily minimum temperature | |||||
---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
||
Windy Harbour | 11.1 | 11.2 | in 2001 | 32 | 13.0 |
Lowest December mean daily minimum temperature for at least 20 years | |||||
---|---|---|---|---|---|
Observed (°C) |
Most recent lower |
Average for December |
|||
Bidyadanga | 25.1 | 25.0 | in 1994* | 25.9 | |
Derby Aero | 25.5 | =25.5 | in 1995 | 26.4 |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
Record lowest December mean temperature | |||||
---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Average for December |
||
Derby Aero | 30.0 | 30.2 | in 1998 | 34 | 31.8 |
Curtin Aero | 30.0 | 30.1 | in 1998 | 29 | 31.8 |
Fitzroy Crossing Aero | 30.0 | 30.6 | in 1998 | 23 | 32.6 |
Wyndham Aero | 30.7 | 30.9 | in 2015 | 20 | 32.5 |
Lowest December mean temperature for at least 20 years | |||||
---|---|---|---|---|---|
Observed (°C) |
Most recent lower |
Average for December |
|||
Kununurra Aero | 30.0 | 29.9 | in 1996 | 31.4 | |
Carnegie | 28.2 | 27.6 | in 1999 | 30.0 | |
Doongan | 27.7 | 27.5 | in 2000 | 28.9 | |
Telfer Aero | 31.7 | =31.7 | in 2000 | 33.0 | |
Troughton Island | 29.3 | 29.2 | in 2000 | 30.2 |
Extremes Maps Records Summaries Important notes the top
Summary statistics for December 2020 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
Mean for December 2020 |
Diff from average |
Highest for December 2020 |
Mean for December 2020 |
Diff from average |
Lowest for December 2020 |
Total for December 2020 |
Average for December |
Rank of December 2020 |
Fraction of December average |
|||
North Kimberley (district 01) | ||||||||||||
Doongan | 32.6 | -2.0 | 36.0 | 4th | 22.8 | -0.4 | 20.0 | 1st | 93.8 | 216.1 | low | 43% |
Kalumburu | 33.6 | -2.0 | 37.4 | 16th | 24.7 | -0.3 | 22.8 | 16th | 348.0 | 233.4 | high | 149% |
Mount Elizabeth | 32.3 | -2.0 | 36.8 | 17th | 17.5 | 23rd | 353.7 | 172.3 | v high | 205% | ||
Troughton Island | 32.0 | -1.0 | 33.9 | 1st | 26.6 | -0.8 | 22.7 | 16th | 359.0 | 124.8 | high | 288% |
Truscott | 32.6 | -1.7 | 36.3 | 1st | 25.0 | -1.2 | 22.1 | 16th | 328.8 | 192.7 | high | 171% |
Wyndham Aero | 35.5 | -2.7 | 41.8 | 16th | 25.8 | -0.9 | 23.3 | 9th | 203.2 | 150.0 | high | 135% |
East Kimberley (district 02) | ||||||||||||
Argyle Aerodrome | 36.0 | -1.6 | 41.9 | 16th | 25.7 | -0.4 | 22.4 | 23rd | 196.0 | 135.5 | high | 145% |
Halls Creek Airport | 33.9 | 39.9 | 17th | 23.8 | 18.9 | 22nd | 250.2 | |||||
Kununurra Aero | 34.9 | -2.5 | 40.0 | 16th | 25.0 | -0.5 | 23.0 | 4th | 294.0 | 142.6 | v high | 206% |
Warmun | 36.2 | -2.2 | 42.0 | 16th | 25.6 | +0.4 | 22.0 | 23rd | 189.6 | 119.6 | high | 159% |
West Kimberley (district 03) | ||||||||||||
Bidyadanga | 34.5 | -0.5 | 39.0 | 2nd | 25.1 | -0.8 | 22.5 | 6th | 285.6 | 60.2 | v high | 474% |
Broome Airport | 33.3 | -0.6 | 37.7 | 3rd | 26.1 | -0.5 | 23.4 | 11th | 220.4 | 64.3 | v high | 343% |
Curtin Aero | 35.2 | -3.3 | 40.8 | 1st | 24.8 | -0.4 | 22.5 | 13th | 343.0 | 155.3 | highest | 221% |
Cygnet Bay | 31.5 | -3.4 | 35.7 | 1st | 25.5 | -0.1 | 23.5 | 22nd | 695.6 | 98.8 | highest | 704% |
Derby Aero | 34.4 | -2.9 | 39.7 | 1st | 25.5 | -0.9 | 23.1 | 9th | 436.8 | 83.4 | highest | 524% |
Fitzroy Crossing Aero | 35.2 | -4.2 | 41.1 | 5th | 24.8 | -1.0 | 20.4 | 22nd | 222.6 | 138.1 | high | 161% |
Yampi Sound (Defence) | 34.4 | 40.1 | 5th | 24.8 | 22.4 | 23rd | 594.2 | |||||
De Grey (district 04) | ||||||||||||
Bedout Island | 33.0 | -0.5 | 34.7 | 31st | 27.0 | -0.2 | 24.6 | 10th | ||||
Karratha Aero | 36.0 | +0.1 | 43.8 | 19th | 26.4 | +0.8 | 20.6 | 11th | 88.8 | 15.0 | v high | 592% |
Legendre Island | 32.4 | 0.0 | 35.2 | 23rd | 26.8 | +0.9 | 20.9 | 11th | ||||
Mandora | 36.2 | -0.6 | 41.2 | 4th | 25.4 | +0.9 | 20.5 | 24th | 65.8 | 33.6 | high | 196% |
Marble Bar | 38.9 | -3.1 | 43.5 | 19th | 25.6 | -0.6 | 21.5 | 11th | 199.4 | 37.7 | highest | 529% |
Port Hedland Airport | 36.5 | -0.2 | 42.1 | 1st | 25.9 | +1.7 | 21.9 | 11th | 94.2 | 19.4 | v high | 486% |
Roebourne Aero | 37.8 | -1.7 | 43.0 | 19th | 25.5 | +0.6 | 20.6 | 11th | 81.4 | 16.2 | v high | 502% |
Fortescue (district 05) | ||||||||||||
Barrow Island Airport | 33.5 | +1.1 | 38.7 | 5th | 25.5 | +1.0 | 21.5 | 14th | 39.6 | 6.7 | v high | 591% |
Karijini North | 37.6 | 42.4 | 19th | 24.5 | 18.7 | 11th | 141.8 | |||||
Learmonth Airport | 38.1 | +1.1 | 43.7 | 6th | 22.1 | +1.2 | 17.1 | 1st | 15.2 | 6.1 | v high | 249% |
Mardie | 37.2 | -0.4 | 42.1 | 19th | 25.5 | +2.4 | 20.4 | 11th | 89.8 | 9.4 | v high | 955% |
Onslow Airport | 36.7 | +0.7 | 42.3 | 5th | 24.8 | +2.4 | 22.0 | 14th | 7.8 | 3.3 | v high | 236% |
Thevenard Island | 33.7 | +1.5 | 39.1 | 5th | 25.4 | +1.6 | 23.4 | 1st | 5.0 | 6.9 | high | 72% |
West Gascoyne (district 06) | ||||||||||||
Carnarvon Airport | 31.5 | +2.1 | 45.6 | 21st | 21.6 | +0.9 | 16.0 | 1st | 0 | 5.3 | lowest | 0% |
Denham | 30.7 | +1.4 | 44.1 | 21st | 20.6 | 0.0 | 14.0 | 1st | 0.4 | 2.2 | average | 18% |
Murchison | 38.9 | +1.4 | 44.0 | 3rd | 22.1 | +1.8 | 14.0 | 1st | 27.2 | 13.5 | high | 201% |
Shark Bay Airport | 33.4 | +1.0 | 44.7 | 28th | 20.2 | +0.5 | 14.2 | 1st | 0.2 | 8.1 | average | 2% |
East Gascoyne (district 07) | ||||||||||||
Newman Aero | 37.2 | -2.1 | 41.9 | 17th | 24.5 | +0.4 | 18.9 | 10th | 54.2 | 35.3 | high | 154% |
Paraburdoo Aero | 40.0 | -0.6 | 45.2 | 20th | 25.4 | +0.7 | 19.6 | 8th | 39.8 | 26.4 | high | 151% |
Murchison (district 07A) | ||||||||||||
Meekatharra Airport | 37.8 | +1.2 | 42.3 | 19th | 23.2 | +1.0 | 15.6 | 1st | 19.8 | 14.5 | high | 137% |
Mount Magnet Aero | 37.4 | +1.4 | 43.6 | 3rd | 22.0 | +0.7 | 12.4 | 1st | 8.4 | 19.0 | average | 44% |
Paynes Find | 36.5 | +1.4 | 42.5 | 25th | 20.1 | +1.6 | 10.6 | 1st | 18.0 | 12.3 | high | 146% |
North Coast (district 08) | ||||||||||||
Dalwallinu | 34.3 | +0.9 | 42.4 | 25th | 16.4 | +0.6 | 6.6 | 1st | 1.2 | 11.8 | low | 10% |
Geraldton Airport | 32.7 | 43.5 | 23rd | 17.1 | 9.8 | 1st | 0.2 | 5.3 | low | 4% | ||
Kalbarri | 31.9 | +0.7 | 42.7 | 22nd | 18.6 | +1.0 | 12.6 | 1st | 0 | 3.8 | lowest | 0% |
Morawa Airport | 36.9 | +1.5 | 43.7 | 25th | 18.2 | +0.7 | 8.2 | 1st | 1.2 | 14.0 | low | 9% |
Mullewa | 36.9 | +2.4 | 43.4 | 25th | 19.0 | +1.9 | 9.9 | 1st | 8.8 | 8.5 | average | 104% |
North Island | 27.1 | +0.5 | 34.9 | 23rd | 20.2 | +0.2 | 16.6 | 24th | 0.2 | 4.0 | average | 5% |
Wongan Hills | 35.1 | +2.5 | 42.7 | 25th | 16.1 | +0.3 | 6.8 | 1st | 1.0 | 9.8 | average | 10% |
Central Coast (district 09) | ||||||||||||
Badgingarra Research Stn | 34.1 | +2.0 | 43.0 | 25th | 16.2 | +1.1 | 6.8 | 1st | 0 | 8.8 | lowest | 0% |
Bickley | 30.0 | +1.8 | 39.1 | 25th | 14.3 | +0.5 | 6.5 | 1st | 10.6 | 14.5 | average | 73% |
Garden Island HSF | 27.7 | +2.2 | 38.7 | 24th | 17.8 | +0.5 | 11.2 | 1st | 0.2 | 9.9 | lowest | 2% |
Gingin Aero | 33.1 | +2.3 | 42.8 | 24th | 15.3 | +0.9 | 2.2 | 1st | ||||
Gosnells City | 32.6 | +2.1 | 40.5 | 23rd | 17.3 | +0.9 | 8.0 | 1st | 7.4 | 11.3 | average | 65% |
Jandakot Aero | 31.6 | +2.4 | 41.2 | 24th | 16.2 | +1.4 | 5.0 | 1st | 2.2 | 10.4 | average | 21% |
Jurien Bay | 30.6 | +2.3 | 40.0 | 29th | 16.7 | +1.1 | 8.4 | 1st | 1.2 | 6.4 | average | 19% |
Karnet | 30.0 | +1.8 | 38.6 | 25th | 14.3 | +0.8 | 4.8 | 1st | 4.8 | 18.6 | low | 26% |
Lancelin | 29.5 | +2.2 | 39.7 | 23rd | 16.1 | -0.1 | 9.2 | 1st | 1.0 | 8.3 | low | 12% |
Millendon (Swan Valley) | 32.8 | 42.2 | 24th | 16.3 | 6.2 | 1st | 2.0 | |||||
Pearce RAAF | 33.4 | +2.9 | 42.6 | 24th | 16.7 | +2.1 | 5.4 | 1st | ||||
Perth Airport | 32.4 | +3.3 | 41.7 | 24th | 16.4 | +1.4 | 4.9 | 1st | 4.0 | 11.1 | average | 36% |
Perth Metro | 31.7 | +2.4 | 41.1 | 24th | 16.9 | +0.5 | 6.6 | 1st | 4.4 | 10.4 | average | 42% |
Rottnest Island | 26.5 | +1.4 | 37.7 | 23rd | 17.9 | +0.2 | 12.8 | 1st | 1.4 | 10.5 | low | 13% |
Swanbourne | 29.1 | +1.2 | 39.7 | 23rd | 17.6 | +1.0 | 9.0 | 1st | 2.8 | 10.9 | average | 26% |
South Coast (district 09A) | ||||||||||||
Albany | 21.1 | -0.7 | 30.7 | 11th | 15.0 | +0.9 | 10.0 | 2nd | 24.4 | 30.1 | average | 81% |
Albany Airport | 22.9 | 31.7 | 11th | 12.3 | 6.0 | 15th | 25.8 | |||||
Bridgetown | 28.4 | +0.7 | 38.0 | 24th | 11.6 | +0.6 | 3.9 | 15th | 2.4 | 18.2 | low | 13% |
Bunbury | 29.3 | +1.9 | 37.9 | 30th | 13.8 | +0.3 | 5.5 | 1st | 5.0 | 16.6 | average | 30% |
Busselton Aero | 29.5 | +1.4 | 37.6 | 30th | 13.0 | +0.6 | 6.1 | 14th | 2.4 | 10.1 | average | 24% |
Cape Leeuwin | 22.6 | +0.8 | 30.1 | 24th | 16.1 | +0.3 | 11.3 | 2nd | 5.0 | 20.5 | low | 24% |
Cape Naturaliste | 27.5 | +3.8 | 35.5 | 23rd | 14.2 | +0.2 | 9.3 | 2nd | 4.0 | 13.4 | average | 30% |
Collie East | 30.3 | +1.5 | 39.0 | 24th | 11.7 | +0.2 | 5.1 | 1st | 3.0 | 19.9 | low | 15% |
Donnybrook | 29.9 | +1.6 | 38.5 | 24th | 34.0 | 16.5 | high | 206% | ||||
Dwellingup | 30.3 | +2.9 | 39.2 | 24th | 13.5 | +0.9 | 4.4 | 1st | 7.2 | 20.6 | average | 35% |
Esperance | 24.8 | +0.1 | 42.0 | 25th | 13.8 | -0.6 | 8.6 | 2nd | 7.4 | 19.8 | low | 37% |
Esperance Aero | 26.3 | +0.3 | 42.8 | 25th | 12.7 | -0.8 | 8.2 | 1st | 11.2 | 21.9 | low | 51% |
Hopetoun North | 23.4 | -0.7 | 34.8 | 24th | 14.1 | +0.3 | 8.1 | 2nd | 8.2 | 23.3 | average | 35% |
Jarrahwood | 28.8 | +1.5 | 36.5 | 24th | 11.9 | +0.8 | 4.5 | 2nd | 39.0 | 17.5 | high | 223% |
Manjimup | 27.3 | +2.3 | 35.5 | 23rd | 11.3 | -0.4 | 6.9 | 1st | 16.6 | 25.3 | average | 66% |
North Walpole | 23.3 | +0.7 | 33.0 | 11th | 12.7 | -0.1 | 7.1 | 15th | 25.2 | 41.9 | average | 60% |
Rocky Gully | 25.7 | 0.0 | 34.7 | 23rd | 10.8 | -0.2 | 5.8 | 15th | 32.8 | 29.4 | average | 112% |
Shannon | 25.0 | +0.5 | 34.2 | 23rd | 11.4 | +0.1 | 5.7 | 15th | 30.6 | 32.0 | average | 96% |
Windy Harbour | 23.2 | +1.3 | 36.2 | 10th | 11.1 | -1.9 | 8.5 | 16th | 9.4 | 28.0 | low | 34% |
Witchcliffe | 26.2 | +1.3 | 36.7 | 10th | 12.5 | +0.1 | 6.4 | 2nd | 4.0 | 17.9 | low | 22% |
North Central (district 10) | ||||||||||||
Bencubbin | 33.1 | +0.6 | 41.0 | 25th | 16.5 | +0.5 | 7.8 | 1st | 5.5 | 13.4 | average | 41% |
Cunderdin Airfield | 34.1 | +1.0 | 43.7 | 25th | 15.1 | +0.2 | 2.9 | 1st | 0 | 8.1 | lowest | 0% |
Merredin | 33.3 | +1.1 | 41.6 | 25th | 16.5 | +0.6 | 8.0 | 1st | 13.2 | 14.0 | average | 94% |
Northam | 33.5 | +1.3 | 43.8 | 25th | 15.8 | +0.5 | 5.5 | 1st | 3.5 | 9.2 | average | 38% |
York | 33.7 | +1.3 | 43.2 | 25th | 14.2 | +0.2 | 3.0 | 1st | 1.2 | 11.8 | low | 10% |
South Central (district 10A) | ||||||||||||
Beverley | 34.3 | +2.0 | 43.6 | 25th | 14.8 | +0.4 | 8.4 | 14th | 0.6 | 10.4 | low | 6% |
Brookton | 32.6 | +1.5 | 42.5 | 25th | 14.1 | +0.6 | 3.0 | 1st | 0.1 | 10.3 | low | 1% |
Hyden | 32.4 | +0.4 | 43.5 | 25th | 13.7 | -0.2 | 4.0 | 1st | 10.8 | 14.4 | average | 75% |
Jacup | 26.7 | +0.2 | 41.8 | 25th | 10.8 | -0.7 | 4.1 | 1st | 13.8 | 27.5 | average | 50% |
Katanning | 29.0 | +0.2 | 40.0 | 24th | 11.3 | -0.5 | 5.7 | 1st | 1.2 | 24.0 | low | 5% |
Lake Grace | 30.2 | +0.6 | 41.6 | 25th | 13.4 | -0.2 | 5.2 | 1st | 0.2 | 20.4 | lowest | 1% |
Narembeen | 33.3 | +1.2 | 42.7 | 25th | 15.3 | +0.8 | 6.8 | 15th | 23.0 | 12.9 | high | 178% |
Narrogin | 30.5 | +1.5 | 40.1 | 25th | 13.3 | +0.9 | 4.0 | 1st | 0 | 14.0 | lowest | 0% |
Newdegate Research Station | 30.4 | +0.7 | 42.3 | 25th | 12.1 | +0.4 | 4.2 | 1st | 9.6 | 15.2 | average | 63% |
Pingelly | 30.9 | +0.7 | 41.4 | 25th | 14.1 | +0.2 | 4.5 | 1st | 1.4 | 12.6 | average | 11% |
Ravensthorpe | 27.2 | -0.1 | 40.8 | 25th | 12.7 | -0.1 | 7.0 | 1st | 4.6 | 23.7 | low | 19% |
Wagin | 29.4 | 0.0 | 40.4 | 24th | 12.8 | -0.2 | 4.6 | 1st | 0.4 | 13.2 | low | 3% |
Wandering | 31.7 | +1.2 | 42.0 | 25th | 12.4 | +0.3 | 2.3 | 1st | 0.2 | 17.2 | v low | 1% |
Eucla (district 11) | ||||||||||||
Eucla | 25.5 | +0.6 | 44.4 | 4th | 15.6 | +0.4 | 9.9 | 2nd | 30.0 | 18.8 | high | 160% |
Eyre | 27.0 | +1.2 | 43.6 | 4th | 12.9 | -1.2 | 1.4 | 2nd | 27.7 | 21.0 | high | 132% |
Forrest | 29.1 | -2.7 | 44.2 | 4th | 14.0 | -1.1 | 8.5 | 2nd | 45.0 | 25.8 | high | 174% |
Red Rocks Point | 26.7 | +1.9 | 44.9 | 26th | 16.2 | -0.3 | 9.7 | 2nd | ||||
South East (district 12) | ||||||||||||
Bulga Downs | 36.1 | -0.2 | 43.1 | 26th | 19.9 | -0.4 | 12.0 | 1st | 2.4 | 12.8 | average | 19% |
Kalgoorlie-Boulder Airport | 31.7 | -0.4 | 42.8 | 26th | 17.3 | +0.6 | 9.0 | 1st | 4.4 | 16.3 | low | 27% |
Laverton Aero | 33.1 | -0.9 | 41.9 | 26th | 19.2 | -0.7 | 13.7 | 28th | 17.4 | 28.4 | average | 61% |
Leinster Aero | 35.6 | -0.1 | 41.9 | 3rd | 20.7 | -0.6 | 14.5 | 1st | 3.4 | 24.6 | low | 14% |
Leonora Aero | 34.3 | -1.3 | 43.5 | 26th | 20.2 | -0.9 | 14.3 | 1st | 3.2 | 16.0 | low | 20% |
Munglinup West | 27.8 | +0.1 | 41.9 | 25th | 12.2 | -0.5 | 7.4 | 1st | 3.4 | 25.5 | low | 13% |
Norseman Aero | 30.9 | -0.4 | 40.3 | 25th | 13.4 | -0.7 | 4.0 | 1st | 1.8 | 20.3 | low | 9% |
Salmon Gums Res.Stn. | 29.3 | +0.2 | 41.6 | 25th | 11.5 | -0.7 | 3.8 | 28th | 4.0 | 19.5 | low | 21% |
Southern Cross Airfield | 33.3 | +0.3 | 41.8 | 25th | 16.2 | +0.5 | 6.3 | 1st | 4.0 | 15.5 | low | 26% |
North East (district 13) | ||||||||||||
Carnegie | 36.1 | -1.6 | 40.9 | 31st | 20.2 | -2.1 | 15.3 | 16th | 82.3 | 25.2 | v high | 327% |
Giles Meteorological Office | 33.9 | -2.0 | 41.9 | 4th | 21.1 | -0.9 | 15.7 | 23rd | 127.0 | 47.9 | v high | 265% |
Telfer Aero | 37.8 | -2.6 | 44.0 | 17th | 25.7 | +0.1 | 19.3 | 10th | ||||
Warburton Airfield | 34.0 | -2.8 | 41.7 | 4th | 21.1 | -0.4 | 16.4 | 1st | 137.2 | 33.1 | v high | 415% |
Wiluna Aero | 36.9 | 41.9 | 26th | 22.3 | 16.9 | 1st | 10.8 | |||||
Offshore Islands (district 200) | ||||||||||||
Adele Island | 30.9 | 32.7 | 5th | 26.0 | 22.5 | 22nd | ||||||
Rowley Shoals | 30.2 | 32.2 | 25th | 27.4 | 25.2 | 10th | ||||||
Varanus Island | 31.7 | +0.5 | 34.2 | 3rd | 25.8 | +0.9 | 21.2 | 14th | 72.6 | 5.8 | highest | 1252% |
Extremes Maps Records Summaries Important notes the top
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 8 am on Monday 4 January 2021. 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
- media@bom.gov.au (03) 9669 4057
Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence