Monday, 1 May 2023 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0
Western Australia in April 2023
Rainfall
- April rainfall was above average to very much above average for the eastern two-thirds of Western Australia and the state's southwest. In contrast, little to nil rainfall was recorded in the western Pilbara, Gascoyne and Central West districts.
- State-wide, April rainfall was the ninth-highest monthly rainfall on record, and wettest since 2000.
- Severe tropical cyclone Ilsa at mid-April, combined with a low pressure system during the late April resulting in many sites in the north and south-west of the state had their wettest wettest April on record., or wettest April for over 20 years.
- Ilsa and the low also brought a number of April daily rainfall record; a trough across the north at the start of April saw Derby and others having their highest April daily rainfall on record.
Temperature
- Mean maximum temperatures were above average for western and northern half of Western Australia, but mean maxima were generally close to average in the southeast of the state.
- State-wide, the mean maximum temperature was 0.84 °C below the 1961–1990 average, coolest since 2015.
- Mean minimum temperatures were below to very much below average in the western parts, whilst mean minima were generally close to average for the remainder of the state.
- State-wide, the mean minimum temperature was 0.48 °C below the 1961–1990 average, coolest since 2006.
- Mean maximum temperatures were in the low 20s, which were 2–3 °C below average, in the southwest of the state; several sites in the Perth hills, the Central Wheat Belt and South West districts had their coolest April on record.
- Several sites in the northwest, including Carnavon Airport, had their lowest April mean daily minimum temperature on record.
Extremes Maps Records Summaries Important notes the top
| Extremes in April 2023 | |
|---|---|
| Hottest day | 39.7 °C at Port Hedland Airport on the 11th |
| Warmest days on average | 35.5 °C at Fitzroy Crossing Aero |
| Coolest days on average |
20.5 °C at Bickley 20.5 °C at Rocky Gully |
| Coldest day | 13.8 °C at Shannon on the 14th |
| Coldest night | 0.5 °C at Salmon Gums Res.Stn. on the 19th |
| Coolest nights on average | 7.8 °C at Jarrahwood |
| Warmest nights on average | 25.3 °C at Varanus Island |
| Warmest night | 29.6 °C at Broome Airport on the 2nd |
| Warmest on average overall | 29.1 °C at Wyndham Aero |
| Coolest on average overall | 14.6 °C at Wandering |
| Wettest overall | 261.5 mm at Walpole Forestry |
| Wettest day | 194.8 mm at Bamboo Creek on the 14th |
| Strongest wind gust | 126 km/h at Telfer Aero on the 14th |
Extremes Maps Records Summaries Important notes the top
| Maps | |||
|---|---|---|---|
| Observed | Anomaly | Decile rank | |
| Total rainfall |
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| Mean daily maximum temperatures |
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| Mean daily minimum temperatures |
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Click on a map to show it full size in a pop-up window
| Record highest April daily rainfall | ||||||
|---|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
||||
| Bamboo Creek | 194.8 | on the 14th | 110.0 | on the 6th in 2012 | 97 | |
| Doolgunna | 94.0 | on the 2nd | 60.0 | on the 8th in 2003 | 93 | |
| Derby Aero | 79.8 | on the 3rd | 66.0 | on the 3rd in 2003 | 63 | |
| Culford | 52.2 | on the 26th | 45.0 | on the 22nd in 1967 | 56 | |
| Yulmbu | 85.4 | on the 3rd | 58.8 | on the 7th in 2020 | 54 | |
| Walpole Forestry | 73.0 | on the 26th | 61.8 | on the 1st in 2005 | 53 | |
| Kilto Station | 55.5 | on the 13th | =55.5 | on the 13th in 2019 | 39 | |
| Bunbury | 51.6 | on the 26th | 48.4 | on the 10th in 2015 | 28 | |
| Larrawa | 103.8 | on the 13th | 52.0 | on the 17th in 2000 | 27 | |
| Liveringa Station | 51.0 | on the 7th | 47.2 | on the 6th in 2003 | 23 | |
| Tjukayirla | 58.0 | on the 14th | 39.4 | on the 17th in 2017 | 23 | |
| Mount William | 85.6 | on the 26th | 67.6 | on the 16th in 2007 | 20 | |
| Yealering East | 28.8 | on the 1st | 25.4 | on the 1st in 2006 | 20 | |
| Record highest April total rainfall | |||||
|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
Average for April |
||
| Dwellingup | 174.4 | 157.5 | in 2008 | 90 | 66.2 |
| Carnegie | 153.1 | 148.0 | in 2003 | 68 | 23.5 |
| Telfer Aero | 129.4 | 115.2 | in 2000 | 50 | 19.6 |
| Walpole Forestry | 261.5 | 196.2 | in 2005 | 50 | 84.2 |
| Kilto Station | 140.9 | 82.8 | in 2019 | 40 | 25.4 |
| Huntly | 175.6 | 160.5 | in 2008 | 33 | 60.6 |
| Larrawa | 135.8 | 135.0 | in 2000 | 28 | 15.8 |
| Tjukayirla | 75.0 | 73.0 | in 2004 | 25 | 26.2 |
| Wandering | 97.2 | 78.6 | in 2008 | 24 | 31.7 |
| Derby Main Roads | 126.4 | 86.8 | in 2011 | 23 | 24.7 |
| Liveringa Station | 140.5 | 71.2 | in 2011 | 23 | 21.0 |
| Jindong | 111.2 | 101.0 | in 2008 | 21 | 41.9 |
| Coondee | 74.4 | 56.0 | in 2016 | 20 | 21.1 |
| Mount William | 186.4 | 162.4 | in 2008 | 20 | 65.1 |
| Yealering East | 72.8 | 46.6 | in 2008 | 20 | 18.1 |
| Highest April total rainfall for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (mm) |
Most recent higher |
Average for April |
|||
| Bamboo Creek | 226.4 | 412.2 | in 1898* | 22.1 | |
| Roy Hill | 95.0 | 254.1 | in 1920* | 22.8 | |
| Derby Aero | 165.0 | 276.1 | in 1954* | 25.6 | |
| Pemberton | 164.9 | 212.9 | in 1961 | 75.3 | |
| Cape Naturaliste | 124.4 | 187.6 | in 1961* | 44.2 | |
| Meda | 145.4 | 257.8 | in 1954* | 28.7 | |
| Colorado | 83.0 | 133.8 | in 1974 | 22.0 | |
| Mount Walker | 49.8 | 93.8 | in 1974 | 22.6 | |
| Nangeenan | 62.2 | 102.4 | in 1974 | 21.5 | |
| Bulyee | 70.2 | 121.2 | in 1974* | 23.2 | |
| Cowaramup | 161.8 | 165.4 | in 1980 | 68.6 | |
| Yulmbu | 112.8 | 127.5 | in 1961* | 23.9 | |
| Ardath | 68.8 | 71.2 | in 1984* | 21.3 | |
| Hines Hill | 62.0 | 94.5 | in 1988 | 21.4 | |
| Telenning Hill | 82.0 | =82.0 | in 1992 | 23.0 | |
| Cape Leeuwin | 104.2 | 136.2 | in 1993 | 59.5 | |
| Bullfinch | 53.5 | 56.2 | in 1997 | 25.1 | |
| Graham Rock | 71.6 | 87.0 | in 1998 | 24.0 | |
| Holt Rock | 56.4 | 96.4 | in 1998 | 22.6 | |
| Hyden | 55.6 | 57.5 | in 1998 | 23.9 | |
| Newdegate Research Station | 64.0 | 109.8 | in 1998 | 26.4 | |
| Bonney Downs | 113.3 | 133.5 | in 1999 | 23.1 | |
| Doodlakine | 41.8 | 50.8 | in 1998* | 22.3 | |
| Southern Cross Airfield | 52.2 | 77.8 | in 1999 | 23.6 | |
| Country Downs | 115.1 | 155.2 | in 1996* | 41.3 | |
| Cygnet Bay | 194.5 | 327.0 | in 2000 | 41.6 | |
| Udialla | 125.2 | 138.0 | in 2000 | 22.5 | |
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported
| Record lowest April daily maximum temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
|||
| Windy Harbour | 15.1 | on the 24th | = 15.1 | on the 21st in 2005 | 33 | 22.0 |
| Record lowest April mean daily maximum temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
||
| Bickley | 20.5 | 20.9 | in 2008 | 29 | 23.6 |
| Swanbourne | 23.0 | = 23.0 | in 2006 | 29 | 25.3 |
| Bunbury | 22.3 | = 22.3 | in 2006 | 27 | 24.2 |
| Cunderdin Airfield | 23.4 | = 23.4 | in 2006 | 26 | 26.6 |
| York | 23.1 | 23.5 | in 2006 | 26 | 26.4 |
| Wandering | 20.8 | 21.7 | in 2006 | 24 | 24.6 |
| Shark Bay Airport | 29.0 | 29.2 | in 2008 | 22 | 31.1 |
| Lowest April mean daily maximum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent lower |
Average for April |
|||
| Beverley | 23.5 | 22.8 | in 1974* | 26.2 | |
| Brookton | 21.7 | 21.6 | in 1974* | 25.0 | |
| Pingelly | 21.3 | 20.6 | in 1974* | 24.1 | |
| Northam | 23.3 | 23.0 | in 1974* | 26.2 | |
| Kalbarri | 27.8 | 26.6 | in 1979* | 29.5 | |
| Mullewa | 26.5 | 26.2 | in 1968* | 28.8 | |
| Dwellingup | 20.8 | 20.2 | in 1980* | 22.6 | |
| Broome Airport | 32.2 | 32.0 | in 2000 | 34.4 | |
| Bidyadanga | 33.3 | 33.2 | in 2000* | 35.8 | |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
| Record highest April daily minimum temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
|||
| Broome Airport | 29.6 | on the 2nd | = 29.6 | on the 1st in 2020 | 84 | 22.7 |
| Record lowest April temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
|||
| Carnarvon Airport | 8.9 | on the 16th | 9.5 | on the 28th in 1968 | 77 | 19.2 |
| Karratha Aero | 14.7 | on the 17th | = 14.7 | on the 29th in 2006 | 30 | 23.0 |
| York | 2.0 | on the 29th | = 2.0 | on the 30th in 2019 | 27 | 10.9 |
| Lake Grace | 3.0 | on the 28th | = 3.0 | on the 8th in 2001 | 26 | 11.9 |
| Barrow Island Airport | 19.0 | on the 18th | 19.5 | on the 22nd in 2015 | 25 | 24.7 |
| Shark Bay Airport | 10.0 | on the 16th | 11.4 | on the 20th in 2008 | 23 | 18.4 |
| Bulga Downs | 4.9 | on the 26th | = 4.9 | on the 21st in 2019 | 21 | 14.3 |
| Record lowest April mean daily minimum temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
||
| Carnarvon Airport | 16.5 | 17.1 | in 1968 | 76 | 19.2 |
| Meekatharra Airport | 14.5 | = 14.5 | in 2006 | 73 | 17.1 |
| Hyden | 8.6 | 8.9 | in 2006 | 49 | 11.2 |
| Paynes Find | 10.8 | 11.3 | in 2006 | 41 | 14.2 |
| Cunderdin Airfield | 9.4 | = 9.4 | in 2006 | 26 | 12.0 |
| Morawa Airport | 11.4 | 11.7 | in 2006 | 26 | 14.5 |
| Dalwallinu | 10.4 | 10.6 | in 2006 | 25 | 13.2 |
| Lake Grace | 9.9 | 10.2 | in 2006 | 25 | 11.9 |
| Barrow Island Airport | 23.5 | 23.6 | in 2001 | 24 | 24.7 |
| Shark Bay Airport | 16.3 | 17.0 | in 2007 | 22 | 18.4 |
| Bulga Downs | 11.5 | 11.6 | in 2006 | 20 | 14.3 |
| Lowest April mean daily minimum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent lower |
Average for April |
|||
| Learmonth Airport | 18.2 | 18.1 | in 1976 | 20.4 | |
| Narrogin | 9.4 | 9.1 | in 1971* | 10.6 | |
| Badgingarra Research Stn | 11.5 | 10.1 | in 1980* | 13.6 | |
| Brookton | 9.0 | 8.6 | in 1986* | 11.2 | |
| Mullewa | 13.3 | 12.8 | in 1990* | 15.2 | |
| Onslow Airport | 21.2 | =21.2 | in 2001 | 21.6 | |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
| Record lowest April mean temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for April |
||
| Northam | 16.6 | 16.7 | in 2006 | 119 | 19.1 |
| Learmonth Airport | 25.0 | 25.1 | in 2015 | 48 | 26.9 |
| Cunderdin Airfield | 16.4 | = 16.4 | in 2006 | 26 | 19.3 |
| Barrow Island Airport | 26.5 | = 26.5 | in 2015 | 24 | 28.0 |
| Wandering | 14.6 | 14.9 | in 2006 | 24 | 17.0 |
| Shark Bay Airport | 22.7 | 23.4 | in 2006 | 22 | 24.8 |
| Lowest April mean temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent lower |
Average for April |
|||
| Carnarvon Airport | 22.6 | 21.4 | in 1968 | 24.2 | |
| Brookton | 15.3 | 14.9 | in 1968* | 18.1 | |
| Narrogin | 15.1 | 13.9 | in 1968* | 16.8 | |
| Kalbarri | 21.4 | 20.7 | in 1979* | 23.0 | |
| Mullewa | 19.9 | 19.7 | in 1968* | 22.0 | |
| Carnegie | 21.0 | 20.8 | in 2000* | 23.3 | |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
Extremes Maps Records Summaries Important notes the top
| Summary statistics for April 2023 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for April 2023 |
Diff from average |
Highest for April 2023 |
Mean for April 2023 |
Diff from average |
Lowest for April 2023 |
Total for April 2023 |
Average for April |
Rank of April 2023 |
Fraction of April average |
|||
| North Kimberley (district 01) | ||||||||||||
| Doongan | 32.0 | -1.4 | 36.0 | 1st | 20.3 | +1.2 | 12.0 | 19th | 74.1 | 45.3 | high | 164% |
| Wyndham Aero | 34.6 | -2.4 | 38.7 | 1st | 23.6 | +0.2 | 15.8 | 19th | 73.4 | 27.5 | v high | 267% |
| East Kimberley (district 02) | ||||||||||||
| Argyle Aerodrome | 33.7 | -1.7 | 37.7 | 1st | 23.1 | 0.0 | 15.2 | 18th | 86.6 | 24.4 | v high | 355% |
| Halls Creek Airport | 32.8 | 37.5 | 1st | 20.1 | 10.6 | 18th | 36.2 | |||||
| Kununurra Aero | 33.6 | -1.9 | 38.0 | 1st | 22.4 | +0.6 | 13.7 | 18th | 101.4 | 31.5 | v high | 322% |
| Warmun | 37.5 | 1st | 21.7 | +1.0 | 14.5 | 19th | 50.4 | 24.9 | high | 202% | ||
| West Kimberley (district 03) | ||||||||||||
| Bidyadanga | 33.3 | -2.5 | 38.2 | 2nd | 20.7 | -1.5 | 15.0 | 30th | 40.4 | 24.5 | high | 165% |
| Broome Airport | 32.2 | -2.2 | 36.5 | 2nd | 22.7 | 0.0 | 16.2 | 19th | 67.6 | 25.5 | high | 265% |
| Curtin Aero | 34.0 | -2.5 | 37.6 | 1st | 21.9 | -0.4 | 16.7 | 19th | 104.6 | 38.5 | v high | 272% |
| Derby Aero | 33.4 | -2.4 | 37.5 | 27th | 22.2 | -0.6 | 17.5 | 19th | 165.0 | 25.6 | v high | 645% |
| Fitzroy Crossing Aero | 35.5 | -1.5 | 39.4 | 1st | 20.6 | -0.2 | 13.4 | 19th | 19.0 | 23.7 | average | 80% |
| De Grey (district 04) | ||||||||||||
| Karratha Aero | 33.2 | -1.2 | 36.3 | 14th | 22.8 | -0.2 | 14.7 | 17th | 1.8 | 17.1 | average | 11% |
| Legendre Island | 31.2 | -1.4 | 33.4 | 6th | 21.4 | 18th | ||||||
| Mandora | 35.1 | -1.2 | 39.0 | 1st | 21.8 | +0.9 | 15.5 | 25th | 23.2 | 18.9 | high | 123% |
| Marble Bar | 33.7 | -2.6 | 39.4 | 10th | 21.7 | -0.4 | 14.1 | 17th | 101.4 | 23.4 | v high | 433% |
| Port Hedland Airport | 33.8 | -1.5 | 39.7 | 11th | 22.5 | +0.9 | 15.1 | 16th | 17.0 | 21.3 | high | 80% |
| Roebourne Aero | 35.3 | -1.0 | 38.7 | 7th | 22.3 | +0.4 | 15.4 | 18th | 0.4 | 8.2 | average | 5% |
| Fortescue (district 05) | ||||||||||||
| Barrow Island Airport | 29.5 | -1.9 | 32.8 | 3rd | 23.5 | -1.2 | 19.0 | 18th | 13.2 | 34.1 | average | 39% |
| Karijini North | 32.6 | 37.3 | 10th | 20.3 | 11.7 | 16th | 11.8 | |||||
| Learmonth Airport | 31.8 | -1.6 | 35.8 | 13th | 18.2 | -2.2 | 12.0 | 16th | 0.2 | 19.5 | average | 1% |
| Mardie | 34.2 | -1.7 | 37.7 | 12th | 21.1 | -0.2 | 14.5 | 17th | 0 | 19.2 | lowest | 0% |
| Onslow Airport | 33.3 | -0.7 | 36.9 | 13th | 21.2 | -0.4 | 16.2 | 18th | 0 | 12.4 | lowest | 0% |
| Thevenard Island | 31.3 | -0.9 | 33.7 | 23rd | 23.4 | -1.1 | 19.0 | 19th | 0 | 18.2 | lowest | 0% |
| West Gascoyne (district 06) | ||||||||||||
| Carnarvon Airport | 28.7 | -0.6 | 34.8 | 19th | 16.5 | -2.7 | 8.9 | 16th | 7.2 | 15.7 | average | 46% |
| Denham | 27.5 | -1.2 | 32.4 | 19th | 17.9 | -1.9 | 12.7 | 16th | 2.0 | 14.3 | average | 14% |
| Emu Creek Station | 32.7 | -2.3 | 36.7 | 13th | 19.2 | -1.6 | 13.6 | 16th | 7.8 | 20.2 | average | 39% |
| Murchison | 28.0 | -3.0 | 33.0 | 23rd | 13.9 | -2.4 | 8.0 | 20th | 0.4 | 21.3 | v low | 2% |
| Shark Bay Airport | 29.0 | -2.1 | 32.8 | 22nd | 16.3 | -2.1 | 10.0 | 16th | 0.4 | 10.3 | low | 4% |
| East Gascoyne (district 07) | ||||||||||||
| Newman Aero | 29.6 | -2.6 | 36.7 | 10th | 16.9 | -0.8 | 8.0 | 30th | 19.0 | 21.6 | average | 88% |
| Paraburdoo Aero | 32.3 | -1.5 | 36.7 | 12th | 19.0 | -0.9 | 13.2 | 18th | 4.6 | 23.6 | low | 19% |
| Murchison (district 07A) | ||||||||||||
| Meekatharra Airport | 26.4 | -3.0 | 33.0 | 13th | 14.5 | -2.6 | 7.7 | 26th | 37.2 | 18.8 | high | 198% |
| Mount Magnet Aero | 26.7 | -2.3 | 31.8 | 3rd | 13.7 | -2.7 | 8.4 | 15th | 0.6 | 17.4 | v low | 3% |
| Paynes Find | 26.1 | -2.4 | 31.2 | 3rd | 10.8 | -3.4 | 4.6 | 29th | 6.8 | 24.5 | low | 28% |
| North Coast (district 08) | ||||||||||||
| Dalwallinu | 24.2 | -2.9 | 31.0 | 23rd | 10.4 | -2.8 | 4.4 | 29th | 18.4 | 14.1 | high | 130% |
| Geraldton Airport | 26.7 | -2.1 | 31.9 | 22nd | 13.2 | -2.4 | 8.5 | 16th | 3.4 | 27.4 | low | 12% |
| Kalbarri | 27.8 | -1.7 | 33.0 | 19th | 15.1 | -1.3 | 11.4 | 10th | 1.9 | 19.2 | low | 10% |
| Morawa Airport | 26.5 | -2.5 | 32.5 | 23rd | 11.4 | -3.1 | 6.2 | 29th | 1.8 | 18.0 | low | 10% |
| Mullewa | 26.5 | -2.3 | 32.0 | 23rd | 13.3 | -1.9 | 8.8 | 26th | 2.2 | 21.5 | low | 10% |
| North Island | 25.5 | -0.9 | 28.1 | 3rd | 19.1 | -1.4 | 14.0 | 23rd | 4.4 | 14.9 | average | 30% |
| Central Coast (district 09) | ||||||||||||
| Badgingarra Research Stn | 24.7 | -2.5 | 31.7 | 23rd | 11.5 | -2.1 | 5.2 | 25th | 15.8 | 26.3 | average | 60% |
| Bickley | 20.5 | -3.1 | 27.6 | 23rd | 11.2 | -1.5 | 6.5 | 28th | 94.6 | 55.4 | high | 171% |
| Garden Island HSF | 22.6 | -1.3 | 30.1 | 22nd | 14.5 | -1.6 | 8.4 | 25th | 72.6 | 38.5 | v high | 189% |
| Gingin Aero | 24.4 | -2.4 | 31.8 | 23rd | 9.9 | -2.1 | 2.6 | 29th | 25.8 | 27.8 | average | 93% |
| Jandakot Aero | 23.4 | -2.4 | 30.1 | 22nd | 11.3 | -1.3 | 4.6 | 29th | 43.2 | 41.5 | average | 104% |
| Millendon (Swan Valley) | 24.2 | 32.0 | 23rd | 11.3 | 4.7 | 29th | 37.8 | |||||
| Pearce RAAF | 24.8 | -1.7 | 32.2 | 23rd | 12.0 | -1.4 | 4.9 | 29th | 35.4 | 33.9 | average | 104% |
| Perth Airport | 24.0 | -1.7 | 30.9 | 23rd | 11.9 | -1.1 | 5.4 | 29th | 39.2 | 39.9 | average | 98% |
| Perth Metro | 23.7 | -2.3 | 30.3 | 22nd | 12.1 | -1.7 | 5.1 | 29th | 45.4 | 37.0 | high | 123% |
| Rottnest Island | 22.2 | -1.5 | 27.3 | 22nd | 15.8 | -1.5 | 10.7 | 25th | 40.4 | 33.7 | average | 120% |
| Swanbourne | 23.0 | -2.3 | 30.1 | 22nd | 13.7 | -1.6 | 7.7 | 29th | 37.4 | 39.9 | average | 94% |
| South Coast (district 09A) | ||||||||||||
| Albany | 20.7 | -0.2 | 28.0 | 23rd | 12.6 | -0.3 | 8.1 | 19th | 133.7 | 69.3 | v high | 193% |
| Albany Airport | 21.5 | -0.7 | 29.0 | 23rd | 10.6 | -1.3 | 4.9 | 19th | 126.0 | 63.7 | v high | 198% |
| Bridgetown | 22.0 | -1.3 | 27.9 | 22nd | 8.4 | -0.9 | 2.0 | 21st | 70.6 | 51.4 | average | 137% |
| Bunbury | 22.3 | -1.9 | 28.1 | 22nd | 11.2 | -0.6 | 5.7 | 28th | 112.4 | 41.1 | v high | 273% |
| Busselton Aero | 22.6 | -1.4 | 28.9 | 2nd | 10.1 | -1.1 | 4.7 | 28th | 76.2 | 38.3 | high | 199% |
| Cape Leeuwin | 21.2 | -0.1 | 24.5 | 2nd | 15.3 | -0.2 | 10.5 | 25th | 104.2 | 59.5 | high | 175% |
| Cape Naturaliste | 22.2 | +0.2 | 25.7 | 23rd | 13.1 | -0.8 | 8.6 | 28th | 124.4 | 44.2 | v high | 281% |
| Collie East | 21.8 | -2.1 | 28.0 | 23rd | 7.9 | -1.1 | 1.7 | 29th | 43.2 | 41.7 | average | 104% |
| Dwellingup | 20.8 | -1.8 | 27.0 | 23rd | 9.5 | -0.9 | 3.1 | 29th | 174.4 | 66.2 | highest | 263% |
| Esperance | 23.2 | -0.1 | 31.5 | 23rd | 13.0 | -0.3 | 8.8 | 30th | 49.2 | 44.2 | average | 111% |
| Esperance Aero | 22.9 | -0.7 | 30.5 | 23rd | 12.0 | -0.7 | 8.1 | 7th | 69.2 | 39.6 | high | 175% |
| Hopetoun North | 22.9 | -0.3 | 31.1 | 23rd | 12.2 | -0.5 | 6.0 | 20th | 41.2 | 38.8 | high | 106% |
| Jarrahwood | 22.6 | -1.2 | 29.0 | 2nd | 7.8 | -0.9 | 2.0 | 21st | 67.0 | 49.7 | average | 135% |
| Mandurah | 22.3 | -1.9 | 28.0 | 22nd | 14.5 | -1.3 | 9.9 | 29th | 53.2 | 39.9 | high | 133% |
| Manjimup | 20.8 | -0.4 | 27.0 | 23rd | 10.5 | -0.3 | 5.9 | 14th | 102.6 | 59.8 | high | 172% |
| North Walpole | 20.8 | -0.6 | 26.8 | 22nd | 12.2 | -0.6 | 7.2 | 19th | 216.6 | 90.2 | v high | 240% |
| Rocky Gully | 20.5 | -1.4 | 27.7 | 23rd | 10.0 | -0.9 | 3.7 | 19th | 62.0 | 54.2 | average | 114% |
| Windy Harbour | 20.9 | -1.1 | 24.5 | 1st | 11.6 | -0.7 | 6.5 | 19th | 147.8 | 70.3 | v high | 210% |
| Witchcliffe West | 21.2 | 26.6 | 22nd | 11.2 | 6.2 | 21st | 103.6 | |||||
| North Central (district 10) | ||||||||||||
| Bencubbin | 23.8 | -2.0 | 29.5 | 23rd | 10.5 | -2.4 | 4.5 | 15th | 34.7 | 22.3 | high | 156% |
| Cunderdin Airfield | 23.4 | -3.2 | 30.4 | 23rd | 9.4 | -2.6 | 2.4 | 29th | 50.0 | 24.2 | high | 207% |
| Merredin | 23.1 | -2.5 | 29.8 | 23rd | 10.4 | -2.5 | 3.6 | 29th | 30.2 | 22.9 | high | 132% |
| Northam | 23.3 | -2.9 | 31.1 | 23rd | 9.9 | -2.1 | 3.1 | 29th | 29.0 | 23.1 | average | 126% |
| York | 23.1 | -3.3 | 30.3 | 23rd | 8.9 | -2.0 | 2.0 | 29th | 45.0 | 21.3 | high | 211% |
| South Central (district 10A) | ||||||||||||
| Beverley | 23.5 | -2.7 | 30.0 | 23rd | 10.0 | -1.3 | 3.0 | 29th | 31.4 | 23.0 | high | 137% |
| Brookton | 21.7 | -3.3 | 28.7 | 23rd | 9.0 | -2.2 | 1.6 | 28th | 54.4 | 25.8 | v high | 211% |
| Hyden | 22.9 | -2.8 | 30.0 | 23rd | 8.6 | -2.6 | 1.0 | 29th | 55.6 | 23.9 | v high | 233% |
| Jacup | 21.3 | -1.7 | 29.6 | 23rd | 9.5 | -1.3 | 4.3 | 19th | 48.4 | 41.7 | average | 116% |
| Katanning | 20.8 | -2.5 | 28.2 | 23rd | 9.8 | -1.3 | 4.9 | 28th | 38.2 | 29.7 | average | 129% |
| Lake Grace | 21.3 | -3.0 | 29.0 | 23rd | 9.9 | -2.0 | 3.0 | 28th | 52.6 | 23.9 | high | 220% |
| Narrogin | 20.8 | -2.3 | 27.8 | 23rd | 9.4 | -1.2 | 2.6 | 28th | 49.4 | 29.1 | high | 170% |
| Newdegate Research Station | 21.4 | -2.9 | 28.6 | 23rd | 8.7 | -1.6 | 1.9 | 28th | 64.0 | 26.4 | high | 242% |
| Pingelly | 21.3 | -2.8 | 28.0 | 23rd | 8.7 | -2.9 | 3.9 | 28th | 54.2 | 26.8 | high | 202% |
| Ravensthorpe | 22.5 | -1.3 | 30.5 | 23rd | 10.8 | -1.1 | 6.0 | 28th | 21.2 | 32.3 | average | 66% |
| Wandering | 20.8 | -3.8 | 27.7 | 23rd | 8.3 | -1.2 | 1.8 | 29th | 97.2 | 31.7 | highest | 307% |
| Eucla (district 11) | ||||||||||||
| Eucla | 24.4 | +0.7 | 33.6 | 25th | 13.8 | +0.4 | 8.6 | 21st | 20.0 | 26.2 | average | 76% |
| Eyre | 25.5 | +1.2 | 37.4 | 13th | 10.9 | -0.8 | 5.0 | 8th | 26.4 | 24.6 | average | 107% |
| Forrest | 25.7 | -0.8 | 33.5 | 13th | 12.5 | +0.4 | 7.3 | 21st | 24.8 | 15.7 | high | 158% |
| South East (district 12) | ||||||||||||
| Bulga Downs | 26.8 | -2.1 | 35.2 | 13th | 11.5 | -2.8 | 4.9 | 26th | 9.4 | 20.1 | average | 47% |
| Kalgoorlie-Boulder Airport | 24.3 | -1.0 | 34.5 | 13th | 11.5 | -1.3 | 4.9 | 29th | 25.6 | 20.2 | high | 127% |
| Laverton Aero | 25.6 | -1.5 | 34.0 | 10th | 13.3 | -1.8 | 6.9 | 29th | 42.8 | 18.8 | high | 228% |
| Leinster Aero | 25.3 | -2.8 | 34.5 | 13th | 13.1 | -2.3 | 7.4 | 29th | 47.8 | 23.9 | high | 200% |
| Leonora Aero | 26.2 | -2.1 | 34.9 | 13th | 13.2 | -2.2 | 6.0 | 15th | 20.2 | 14.7 | high | 137% |
| Munglinup West | 22.7 | -1.6 | 31.1 | 23rd | 10.8 | -1.3 | 6.6 | 28th | 30.0 | 35.9 | average | 84% |
| Norseman Aero | 23.4 | -2.0 | 33.1 | 13th | 9.7 | -1.4 | 2.4 | 29th | 38.8 | 25.1 | high | 155% |
| Salmon Gums Res.Stn. | 23.3 | -0.5 | 30.6 | 13th | 9.3 | -0.7 | 0.5 | 19th | 42.6 | 27.0 | high | 158% |
| Southern Cross Airfield | 23.5 | -2.8 | 29.7 | 23rd | 9.7 | -2.1 | 1.8 | 29th | 52.2 | 23.6 | v high | 221% |
| North East (district 13) | ||||||||||||
| Carnegie | 27.4 | -3.0 | 35.5 | 10th | 14.6 | -1.7 | 7.5 | 30th | 153.1 | 23.5 | highest | 651% |
| Giles Meteorological Office | 28.3 | -1.3 | 35.7 | 10th | 15.7 | -0.8 | 7.6 | 16th | 50.0 | 17.6 | v high | 284% |
| Telfer Aero | 32.1 | -2.6 | 37.7 | 10th | 20.8 | 0.0 | 12.9 | 17th | 129.4 | 19.6 | highest | 660% |
| Warburton Airfield | 28.4 | -1.2 | 37.0 | 10th | 16.0 | +0.5 | 6.8 | 27th | 21.8 | 18.0 | average | 121% |
| Wiluna Aero | 26.4 | 33.0 | 13th | 13.8 | 7.6 | 16th | 46.2 | |||||
| Offshore Islands | ||||||||||||
| Varanus Island | 30.1 | -1.2 | 33.5 | 3rd | 25.3 | -0.9 | 23.0 | 15th | 2.4 | 32.1 | average | 7% |
Extremes Maps Records Summaries Important notes the top
Notes
The Monthly climate summary, usually published in the first week of the following 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.
This statement has been prepared based on information available at 10 am on Monday 1 May 2023. 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.
Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.
Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence
