Sunday, 1 August 2021 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in July 2021: wettest July for decades
July 2021 was the wettest July in decades across Greater Perth. Mean minimum temperatures were one and half degrees to three degrees warmer than average at most locations.
Very wet across Greater Perth
- July 2021 was very wet across Greater Perth, with monthly rainfall totals the 240–310 mm range, and up to 400–460 mm in the Perth hills.
- Many sites had their wettest July on record or wettest July for more than 20 years.
- Bickley recorded 459.2 mm, which is its annual highest monthly total; the last time that Greater Perth saw July rainfall totals of 400 mm was in 1964.
- Perth Airport and Jarrahdale had their wettest July since 1958, and several sites in the Perth hills had their wettest July since 1964.
- Perth Metro recorded 271.4 mm in total, which was the second-wettest July on record at the site, behind 278.6 mm in 1995; it was the 10th-wettest July on record in the official Perth records commencing in 1876.
- Perth Metro recorded rainfall of 0.2 mm or higher in 28 of 31 days, which was the highest count of rain days in July on record at the site, and the second-highest count in July on record in the official Perth records, behind 29 days in 1946.
- Perth Metro recorded 18 consecutive days with daily rainfall of 0.6 mm or higher between the 4th and 21st, which was the longest such spell for any month since 18 consecutive days in 1996 (between 21 July and 7 August).
- Rainfall in excess of 20 mm was recorded on the 5th, 7th, 10th, 21st and 27th at most sites; falls of 60 mm-80 mm were recorded in the Perth hills on the 27th, including a number of July daily rainfall records
Warmer than normal nights
- Mean minimum temperatures were 1.5 °C–3 °C above average at most sites.
- Perth Metro, Jandakot Airport and Swanbourne had their warmest July nights on record , and Perth Airport had its warmest July nights for 25 years.
- Mean maximum temperatures were mostly close to their July average.
Perth Metro
- Total rainfall for Perth Metro was 271.4 mm, which is 185% of the long-term average of 146.8 mm
- The mean daily maximum temperature for Perth Metro was 18.3 °C, which is 0.2 °C below the long-term average of 18.5 °C
- The warmest day was 21.7 °C on the 12th, and the coolest day was on the 4th when the temperature reached 15.9 °C
- The mean daily minimum temperature for Perth Metro was 10.6 °C, which is 2.7 °C above the long-term average of 7.9 °C
- The coldest morning was 4.4 °C on the 3rd, and the warmest morning was on the 13th when the minimum temperature was 13.9 °C
Further information
- Media
- media@bom.gov.au (03) 9669 4057
Extremes Maps Records Summaries Daily observations Important notes the top
| Extremes in July 2021 | |
|---|---|
| Hottest day | 21.9 °C at Gosnells City on the 30th |
| Warmest days on average |
18.3 °C at Millendon (Swan Valley) 18.3 °C at Perth Airport 18.3 °C at Perth Metro 18.3 °C at Rottnest Island |
| Coolest days on average | 14.6 °C at Bickley |
| Coldest day |
11.6 °C at Karnet on the 20th 11.6 °C at Karnet on the 30th |
| Coldest night | 3.4 °C at Jandakot Aero on the 3rd |
| Coolest nights on average | 8.7 °C at Bickley |
| Warmest nights on average | 13.1 °C at Rottnest Island |
| Warmest night | 17.3 °C at Garden Island HSF on the 26th |
| Warmest on average overall | 15.7 °C at Rottnest Island |
| Coolest on average overall | 11.7 °C at Bickley |
| Wettest overall | 459.2 mm at Bickley |
| Wettest day | 77.0 mm at Huntly on the 27th |
| Strongest wind gust |
113 km/h at Rottnest Island on the 6th 113 km/h at Pearce RAAF on the 26th |
Extremes Maps Records Summaries Daily observations Important notes the top
| Record highest July daily rainfall | ||||||
|---|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
||||
| Huntly | 77.0 | on the 27th | 60.8 | on the 22nd in 2004 | 32 | |
| Anketell | 67.2 | on the 27th | 53.4 | on the 5th in 2019 | 20 | |
| Record highest July total rainfall | |||||
|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
Average for July |
||
| Pearce RAAF | 247.0 | 242.6 | in 1995 | 67 | 134.5 |
| Roleystone | 391.9 | 381.1 | in 1964 | 54 | 201.2 |
| Bickley | 459.2 | 364.4 | in 2000 | 53 | 219.7 |
| Karragullen North | 418.2 | 414.3 | in 1964 | 48 | 205.6 |
| Jandakot Aero | 315.0 | 284.6 | in 1974 | 47 | 174.7 |
| Maida Vale | 290.8 | 278.2 | in 1978 | 39 | 162.2 |
| Pinjarra Refinery | 285.7 | 273.2 | in 2000 | 37 | 158.8 |
| Huntly | 430.2 | 381.9 | in 2000 | 29 | 230.8 |
| Swanbourne | 285.4 | 240.0 | in 1995 | 28 | 152.0 |
| Pinjarra South | 218.2 | 184.6 | in 2003 | 21 | 127.2 |
| Anketell | 346.7 | 233.4 | in 2008 | 20 | 160.5 |
| Werribee | 263.6 | 157.6 | in 2018 | 20 | 115.1 |
| Highest July total rainfall for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (mm) |
Most recent higher |
Average for July |
|||
| Perth Airport | 251.2 | 446.7 | in 1958 | 155.5 | |
| Jarrahdale | 443.8 | 520.9 | in 1958* | 226.9 | |
| Chidlow | 336.2 | 340.9 | in 1964* | 177.8 | |
| Gidgegannup | 304.2 | 408.8 | in 1964* | 179.8 | |
| Serpentine | 312.4 | 316.8 | in 1964* | 180.5 | |
| Perth Metro | 271.4 | 278.6 | in 1995 | 146.8 | |
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported
| Record highest July daily minimum temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for July |
|||
| Garden Island HSF | 17.3 | on the 26th | 17.0 | on the 4th in 2002 | 20 | 11.3 |
| Mandurah | 16.7 | on the 26th | 16.4 | on the 31st in 2015 | 20 | 10.7 |
| Record highest July mean daily minimum temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for July |
||
| Jandakot Aero | 10.1 | 9.7 | in 2017 | 31 | 7.0 |
| Perth Metro | 10.6 | = 10.6 | in 1996 | 27 | 7.9 |
| Swanbourne | 11.8 | 11.6 | in 2007 | 27 | 9.8 |
| Highest July mean daily minimum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent higher |
Average for July |
|||
| Perth Airport | 10.2 | 10.5 | in 1996 | 8.0 | |
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for July 2021 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for July 2021 |
Diff from average |
Highest for July 2021 |
Mean for July 2021 |
Diff from average |
Lowest for July 2021 |
Total for July 2021 |
Average for July |
Rank of July 2021 |
Fraction of July average |
|||
| Bickley | 14.6 | -0.5 | 17.3 | 3rd | 8.7 | +1.4 | 5.1 | 31st | 459.2 | 219.7 | highest | 209% |
| Garden Island HSF | 18.0 | +0.1 | 20.5 | 3rd | 12.8 | +1.5 | 8.7 | 3rd | 239.6 | 122.9 | v high | 195% |
| Jandakot Aero | 18.1 | +0.1 | 21.3 | 12th | 10.1 | +3.1 | 3.4 | 3rd | 315.0 | 174.7 | highest | 180% |
| Mandurah | 17.5 | 0.0 | 19.6 | 12th | 12.2 | +1.5 | 8.0 | 31st | ||||
| Millendon (Swan Valley) | 18.3 | 21.1 | 12th | 9.7 | 5.1 | 3rd | 248.8 | |||||
| Pearce RAAF | 18.0 | +0.1 | 20.8 | 12th | 10.2 | +1.8 | 5.4 | 22nd | 247.0 | 134.5 | highest | 184% |
| Perth Airport | 18.3 | +0.3 | 21.4 | 12th | 10.2 | +2.2 | 5.0 | 22nd | 251.2 | 155.5 | v high | 162% |
| Perth Metro | 18.3 | -0.2 | 21.7 | 12th | 10.6 | +2.7 | 4.4 | 3rd | 271.4 | 146.8 | v high | 185% |
| Rottnest Island | 18.3 | +0.5 | 20.6 | 12th | 13.1 | +0.7 | 10.1 | 31st | 166.6 | 112.8 | v high | 148% |
| Swanbourne | 18.0 | -0.4 | 20.7 | 3rd | 11.8 | +2.0 | 8.2 | 3rd | 285.4 | 152.0 | highest | 188% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for July 2021 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
| Bickley | 15.9 | 16.2 | 17.3 | 12.2 | 12.8 | 14.6 | 13.9 | 15.0 | 15.5 | 14.2 | 15.0 | 17.2 | 15.0 | 14.3 | 13.3 | 14.9 | 15.0 | 13.7 | 14.3 | 14.5 | 15.5 | 14.8 | 14.9 | 13.7 | 16.6 | 14.7 | 13.1 | 14.7 | 15.9 | 12.2 | 11.7 |
| Garden Island HSF | 17.7 | 17.8 | 20.5 | 18.5 | 17.3 | 18.9 | 17.6 | 18.5 | 17.4 | 16.9 | 18.5 | 20.2 | 18.8 | 17.3 | 17.2 | 18.0 | 17.9 | 18.2 | 17.7 | 15.4 | 17.3 | 17.0 | 18.1 | 18.0 | 19.5 | 19.6 | 16.4 | 18.5 | 19.6 | 15.9 | 16.6 |
| Jandakot Aero | 18.0 | 18.2 | 20.7 | 16.3 | 17.0 | 19.5 | 18.2 | 18.8 | 19.2 | 17.1 | 18.6 | 21.3 | 19.7 | 17.4 | 17.6 | 17.8 | 18.0 | 18.0 | 17.3 | 13.7 | 18.2 | 17.7 | 18.2 | 17.5 | 20.1 | 19.0 | 16.8 | 18.7 | 20.5 | 16.2 | 15.8 |
| Karnet | 15.8 | 15.6 | 18.6 | 13.6 | 16.2 | 16.5 | 14.0 | 16.6 | 17.9 | 16.0 | 14.5 | 14.1 | 15.2 | 16.4 | 15.0 | 15.8 | 11.6 | 14.0 | 14.2 | 14.2 | 15.6 | 17.1 | 16.1 | 13.6 | 14.6 | 17.2 | 11.6 | 12.7 | |||
| Mandurah | 17.8 | 17.1 | 18.8 | 18.0 | 16.9 | 18.4 | 17.4 | 18.3 | 17.7 | 16.6 | 17.8 | 19.6 | 18.3 | 17.6 | 17.0 | 17.4 | 17.7 | 17.4 | 16.9 | 13.7 | 17.0 | 16.8 | 17.1 | 17.5 | 18.9 | 18.6 | 16.2 | 17.7 | 19.1 | 15.5 | 16.2 |
| Millendon (Swan Valley) | 19.2 | 19.8 | 19.8 | 16.5 | 17.5 | 18.4 | 17.6 | 18.4 | 18.6 | 17.6 | 18.2 | 21.1 | 19.6 | 18.1 | 17.5 | 17.1 | 17.8 | 17.3 | 17.1 | 17.4 | 18.8 | 18.1 | 19.0 | 18.6 | 20.3 | 18.8 | 16.8 | 19.1 | 20.1 | 16.0 | 15.9 |
| Pearce RAAF | 18.5 | 19.4 | 20.2 | 16.3 | 16.9 | 17.6 | 17.5 | 18.1 | 18.7 | 17.3 | 18.2 | 20.8 | 19.2 | 16.9 | 17.6 | 17.0 | 17.6 | 17.9 | 17.1 | 17.6 | 18.5 | 17.1 | 18.8 | 18.5 | 20.2 | 18.9 | 16.1 | 18.4 | 20.1 | 16.3 | 15.3 |
| Perth Airport | 18.2 | 19.0 | 20.3 | 15.4 | 17.1 | 19.7 | 17.9 | 18.9 | 19.2 | 17.3 | 18.7 | 21.4 | 19.1 | 17.9 | 18.3 | 17.4 | 18.2 | 17.6 | 17.1 | 16.9 | 18.3 | 17.5 | 18.8 | 18.2 | 20.0 | 19.1 | 16.7 | 19.2 | 20.5 | 16.6 | 16.0 |
| Perth Metro | 19.5 | 18.9 | 20.0 | 15.9 | 16.8 | 19.5 | 17.8 | 18.7 | 19.3 | 18.0 | 18.3 | 21.7 | 18.9 | 18.3 | 17.9 | 17.4 | 18.0 | 18.1 | 17.0 | 16.1 | 18.5 | 17.8 | 19.1 | 18.1 | 20.2 | 18.7 | 16.9 | 19.1 | 20.6 | 16.3 | 16.2 |
| Rottnest Island | 19.1 | 19.0 | 20.0 | 19.1 | 17.4 | 19.3 | 18.5 | 18.9 | 20.0 | 17.8 | 18.3 | 20.6 | 19.2 | 17.6 | 17.8 | 19.0 | 17.9 | 17.8 | 18.1 | 15.9 | 17.5 | 16.8 | 18.3 | 17.8 | 19.9 | 19.6 | 16.6 | 18.6 | 19.8 | 15.6 | 16.6 |
| Swanbourne | 18.1 | 18.8 | 20.7 | 17.3 | 17.1 | 19.3 | 17.9 | 19.2 | 18.8 | 17.1 | 18.6 | 20.6 | 18.8 | 17.3 | 17.4 | 17.3 | 17.1 | 17.8 | 17.4 | 14.4 | 17.4 | 17.0 | 18.5 | 18.1 | 19.9 | 18.4 | 16.7 | 18.7 | 19.8 | 16.1 | 16.4 |
|
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated, and typically occurred in the afternoon of that day. | |||||||||||||||||||||||||||||||
| Temperatures coloured according to their difference from the long-term average for the period |
-10.0 | -9.0 | -8.0 | -7.0 | -6.0 | -5.0 | -4.0 | -3.0 | -2.0 | -1.0 | 0.0 | +1.0 | +2.0 | +3.0 | +4.0 | +5.0 | +6.0 | +7.0 | +8.0 | +9.0 | +10.0 | °C | Grey outline marks highest and lowest for the period |
||||||||
| Daily minimum temperatures for July 2021 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
| Bickley | 9.2 | 7.5 | 5.6 | 7.4 | 8.0 | 8.3 | 8.5 | 9.4 | 10.2 | 6.4 | 8.3 | 8.5 | 12.0 | 10.2 | 8.7 | 8.9 | 9.8 | 10.0 | 8.6 | 10.0 | 10.3 | 6.8 | 7.9 | 8.0 | 10.2 | 10.3 | 9.9 | 7.7 | 9.6 | 8.9 | 5.1 |
| Garden Island HSF | 12.7 | 10.9 | 8.7 | 13.1 | 13.5 | 13.5 | 13.3 | 14.1 | 14.4 | 10.5 | 11.4 | 13.8 | 14.9 | 14.3 | 14.0 | 13.9 | 12.8 | 12.6 | 13.3 | 13.1 | 12.9 | 8.9 | 11.7 | 13.5 | 15.3 | 17.3 | 12.9 | 12.1 | 12.7 | 12.6 | 9.2 |
| Jandakot Aero | 6.9 | 3.4 | 10.0 | 9.1 | 8.5 | 11.7 | 10.4 | 11.7 | 5.3 | 8.8 | 12.3 | 13.6 | 12.5 | 12.4 | 10.6 | 11.5 | 9.0 | 8.5 | 11.3 | 11.6 | 5.2 | 10.4 | 10.2 | 11.0 | 11.2 | 13.1 | 10.6 | 11.9 | 12.6 | 7.2 | |
| Karnet | 8.4 | 6.0 | 8.8 | 7.9 | 6.5 | 8.7 | 5.7 | 9.8 | 12.2 | 10.6 | 9.0 | 7.6 | 10.0 | 7.0 | 6.5 | 9.6 | 10.2 | 5.5 | 8.4 | 6.2 | 9.7 | 11.6 | 5.8 | 9.9 | 9.0 | 3.5 | |||||
| Mandurah | 12.1 | 10.6 | 9.2 | 11.3 | 13.2 | 13.5 | 12.5 | 13.9 | 13.9 | 8.7 | 11.1 | 12.7 | 15.1 | 14.6 | 11.0 | 12.5 | 12.9 | 12.9 | 11.6 | 12.4 | 12.3 | 8.6 | 10.4 | 12.9 | 14.3 | 16.7 | 12.6 | 12.4 | 12.6 | 12.6 | 8.0 |
| Millendon (Swan Valley) | 10.6 | 6.0 | 5.1 | 10.8 | 8.7 | 7.1 | 8.9 | 8.1 | 10.5 | 6.9 | 8.9 | 13.3 | 13.9 | 9.7 | 11.6 | 10.9 | 10.6 | 8.9 | 7.6 | 11.5 | 12.5 | 5.6 | 9.2 | 8.3 | 11.8 | 10.5 | 13.2 | 9.3 | 12.4 | 12.6 | 6.8 |
| Pearce RAAF | 11.0 | 7.0 | 8.1 | 12.4 | 9.1 | 8.8 | 10.0 | 9.4 | 10.3 | 8.5 | 8.9 | 13.2 | 13.1 | 10.5 | 11.2 | 9.9 | 10.9 | 9.5 | 9.0 | 11.8 | 12.6 | 5.4 | 8.3 | 8.8 | 11.2 | 11.1 | 12.6 | 9.9 | 12.9 | 12.0 | 8.1 |
| Perth Airport | 10.6 | 9.1 | 7.2 | 11.9 | 8.9 | 7.8 | 11.5 | 7.9 | 11.2 | 6.1 | 10.6 | 13.1 | 13.6 | 9.5 | 11.7 | 11.3 | 11.7 | 10.0 | 7.9 | 11.8 | 12.5 | 5.0 | 10.3 | 8.7 | 11.1 | 11.0 | 13.0 | 9.5 | 11.9 | 12.7 | 7.0 |
| Perth Metro | 10.7 | 7.9 | 4.4 | 9.7 | 8.8 | 9.1 | 11.8 | 10.1 | 11.7 | 7.5 | 9.8 | 11.6 | 13.9 | 13.3 | 12.8 | 11.8 | 11.8 | 10.8 | 9.1 | 11.8 | 12.6 | 6.1 | 10.5 | 9.8 | 11.8 | 12.0 | 13.5 | 10.7 | 11.8 | 12.5 | 7.9 |
| Rottnest Island | 13.7 | 13.9 | 12.7 | 14.2 | 12.1 | 13.2 | 12.5 | 13.5 | 14.2 | 11.9 | 11.7 | 14.3 | 14.9 | 13.6 | 12.7 | 13.6 | 12.2 | 12.5 | 14.1 | 12.8 | 12.8 | 11.9 | 13.4 | 13.8 | 13.4 | 16.8 | 12.4 | 12.2 | 13.5 | 12.3 | 10.1 |
| Swanbourne | 11.0 | 9.2 | 8.2 | 11.1 | 13.0 | 11.4 | 12.7 | 13.6 | 12.9 | 9.8 | 10.7 | 12.7 | 14.3 | 14.1 | 12.4 | 12.2 | 11.9 | 11.4 | 10.6 | 11.9 | 12.6 | 8.5 | 10.5 | 13.2 | 13.2 | 14.9 | 13.7 | 10.9 | 11.9 | 12.3 | 9.5 |
|
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated, and typically occurred that morning. | |||||||||||||||||||||||||||||||
| Temperatures coloured according to their difference from the long-term average for the period |
-10.0 | -9.0 | -8.0 | -7.0 | -6.0 | -5.0 | -4.0 | -3.0 | -2.0 | -1.0 | 0.0 | +1.0 | +2.0 | +3.0 | +4.0 | +5.0 | +6.0 | +7.0 | +8.0 | +9.0 | +10.0 | °C | Grey outline marks highest and lowest for the period |
||||||||
| Daily rainfall for July 2021 | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | ||
| Anketell | 0.4 | 0.9 | 0.2 | 6.4 | 29.0 | 6.6 | 32.2 | 3.9 | 1.9 | 42.4 | 0.6 | 15.4 | 13.2 | 11.8 | 11.5 | 3.6 | 1.6 | 7.1 | 3.9 | 0.5 | 45.2 | 0.2 | 1.4 | 5.6 | 0.5 | 0.4 | 67.2 | 2.2 | 11.2 | 9.5 | 10.2 | |
| Bickley | 2.8 | - | 0.4 | 1.8 | 50.2 | 11.4 | 43.4 | 6.0 | 6.8 | 37.6 | - | 18.0 | 30.0 | 23.8 | 21.2 | 2.8 | 2.0 | 8.4 | 5.2 | 3.8 | 52.2 | 0.2 | 1.4 | 5.6 | 0.8 | 0.2 | 59.8 | 4.2 | 23.2 | 25.0 | 11.0 | |
| Bungendore | 3.6 | - | - | 0.8 | 44.0 | 8.6 | 41.4 | 5.6 | 3.0 | 63.2 | - | 16.0 | 19.0 | 22.4 | 14.8 | 2.2 | 2.2 | 4.8 | 7.8 | 0.4 | 41.8 | 0.2 | 0.6 | 6.8 | 1.0 | 0.6 | 55.0 | 3.0 | 15.8 | 21.4 | 16.2 | |
| Chidlow | 0.4 | - | - | → | 36.8 | 6.0 | 32.8 | 5.2 | 7.8 | 26.3 | → | 13.6 | 46.6 | 22.5 | 15.5 | - | 2.4 | → | 4.8 | 3.0 | 29.8 | → | 2.0 | 1.0 | → | 0.2 | 37.6 | 3.4 | 7.6 | 20.2 | 10.7 | |
| Garden Island HSF | 0.4 | 1.0 | - | 4.0 | 19.8 | 7.2 | 8.4 | 1.0 | 6.2 | 29.8 | 2.2 | 16.8 | 5.6 | 5.6 | 2.4 | 4.6 | 1.6 | 15.0 | 0.8 | 0.4 | 37.0 | - | 0.6 | 2.4 | - | - | 35.4 | 5.0 | 13.4 | 5.4 | 7.6 | |
| Gidgegannup | 0.6 | 0.6 | - | - | 34.4 | 7.8 | 28.6 | 9.2 | 8.6 | 25.6 | - | 12.4 | 27.6 | 17.6 | 12.0 | 5.6 | 0.8 | 0.2 | 12.6 | 2.2 | 23.4 | 0.2 | 1.0 | 1.4 | 1.4 | - | 29.8 | 3.2 | 12.4 | 12.8 | 12.2 | |
| Huntly | 3.0 | 2.0 | - | 8.0 | 48.0 | 19.0 | 14.0 | 12.0 | 3.0 | 42.3 | - | 19.0 | 22.0 | 16.0 | 19.4 | 4.0 | 2.0 | 10.0 | 4.0 | 1.8 | 31.5 | 1.0 | 2.0 | 13.4 | 1.5 | 1.2 | 77.0 | 3.0 | 30.8 | 10.0 | 9.3 | |
| Jandakot Aero | - | - | 8.4 | 31.0 | 9.0 | 22.2 | 2.0 | 4.8 | 32.8 | 0.2 | 16.4 | 6.8 | 9.6 | 8.0 | 6.4 | 0.4 | 6.8 | 10.6 | 0.6 | 46.4 | - | 1.4 | 2.8 | 0.2 | 0.2 | 47.4 | 2.0 | 21.6 | 3.8 | 13.2 | ||
| Jarrahdale | 1.0 | - | 0.2 | 1.0 | 37.2 | 9.2 | 50.0 | 4.2 | 5.6 | 48.4 | - | 19.6 | 21.4 | 20.4 | 17.2 | 1.8 | 2.8 | 6.4 | 3.0 | 0.8 | 53.0 | 0.2 | 1.4 | 7.2 | 2.2 | 0.4 | 75.4 | 4.0 | 18.8 | 16.8 | 14.2 | |
| Karragullen North | 1.6 | - | - | - | 54.6 | 9.6 | 54.0 | 1.4 | 7.0 | 46.6 | - | 17.0 | 12.2 | 19.0 | 14.6 | 1.8 | 2.2 | 12.0 | 4.8 | 1.8 | 48.6 | - | 1.2 | 6.0 | - | 0.6 | 48.0 | 3.8 | 18.2 | 16.2 | 15.4 | |
| Maida Vale | 1.0 | - | - | 4.4 | 42.8 | 12.2 | 28.4 | 2.2 | - | 27.2 | 0.2 | 10.4 | 21.2 | 10.4 | 13.2 | 4.4 | 4.4 | 3.4 | 3.8 | 1.8 | 21.8 | 0.4 | 3.2 | 3.6 | 0.6 | 0.4 | 33.0 | 5.6 | 10.4 | 16.0 | 4.4 | |
| Millendon (Swan Valley) | 0.4 | 0.4 | - | 1.8 | 36.0 | 5.6 | 27.2 | 6.0 | 9.6 | 26.2 | - | 10.8 | 19.4 | 6.4 | 8.0 | 7.8 | 1.0 | 0.4 | 3.8 | 0.4 | 18.2 | - | 1.0 | 1.4 | 0.8 | - | 28.8 | 2.8 | 7.8 | 11.8 | 5.0 | |
| Mount Solus | 0.2 | 0.4 | 0.2 | 2.6 | 32.8 | 7.2 | 32.0 | 5.0 | 5.2 | 43.8 | 0.2 | 19.2 | 24.4 | 23.8 | 18.4 | 1.4 | 0.2 | 2.4 | 4.4 | 1.6 | 56.0 | 0.6 | 1.0 | 7.2 | 1.8 | 0.4 | 73.4 | 1.8 | 20.0 | 18.6 | 13.8 | |
| Muchea | - | 0.8 | - | 0.4 | 30.6 | 5.2 | 42.2 | 2.0 | 6.2 | 17.8 | - | 12.4 | 27.4 | 6.6 | 13.2 | 3.2 | 1.4 | 1.2 | 6.8 | 0.4 | 11.2 | - | 2.0 | 0.8 | 0.6 | - | 32.0 | 4.6 | 8.0 | 11.0 | 6.6 | |
| Mundaring | 1.0 | 0.2 | - | 5.0 | 37.0 | 7.6 | 28.4 | 3.4 | 11.0 | 28.2 | 0.2 | 12.2 | 32.0 | 21.4 | 22.4 | 2.4 | - | 2.6 | 11.4 | 3.2 | 29.0 | - | 3.8 | 2.2 | 0.4 | - | 41.0 | 5.6 | - | 16.2 | 9.2 | |
| Pearce RAAF | 0.4 | 0.2 | - | 0.4 | 31.4 | 5.4 | 29.2 | 1.4 | 7.4 | 22.4 | 0.8 | 12.6 | 14.2 | 16.0 | 8.6 | 2.4 | 1.4 | 1.4 | 8.8 | 0.2 | 13.2 | - | 2.2 | 0.4 | 0.6 | - | 23.8 | 4.8 | 9.4 | 21.6 | 6.4 | |
| Perth Airport | 0.6 | 0.2 | - | 3.6 | 35.4 | 11.2 | 22.2 | 4.0 | 4.6 | 18.8 | - | 8.6 | 23.4 | 13.0 | 7.0 | 5.0 | 1.0 | 0.6 | 4.0 | 1.0 | 23.0 | - | 1.6 | 0.2 | - | - | 27.8 | 4.4 | 8.0 | 14.6 | 7.4 | |
| Perth Metro | 1.4 | - | - | 1.4 | 44.6 | 7.4 | 23.6 | 4.6 | 4.2 | 30.0 | 0.6 | 9.6 | 13.4 | 14.0 | 2.0 | 13.4 | 2.8 | 1.2 | 5.4 | 1.6 | 29.6 | - | 1.8 | 2.0 | 0.6 | 0.2 | 30.4 | 5.8 | 6.4 | 7.0 | 6.4 | |
| Pinjarra Refinery | 1.0 | 0.2 | - | 5.4 | 31.8 | 8.2 | 7.8 | 5.8 | 6.4 | 28.4 | 0.4 | 17.2 | 18.2 | 10.0 | 9.0 | 4.2 | 0.6 | 12.2 | 4.8 | 0.8 | 11.8 | 0.4 | 1.4 | 7.6 | 0.4 | 0.6 | 48.1 | 3.6 | 24.0 | 7.4 | 8.0 | |
| Pinjarra South | 1.4 | 0.6 | 0.2 | 3.4 | 23.4 | 8.2 | 6.0 | 5.4 | 3.4 | 18.4 | 0.2 | 9.2 | 17.0 | 9.8 | 7.4 | 1.6 | 1.2 | 4.6 | 4.2 | - | 14.4 | - | - | 8.0 | 0.2 | - | 39.0 | 0.6 | 19.2 | 3.6 | 7.6 | |
| Roleystone | 1.2 | - | - | - | 42.0 | 4.2 | 37.6 | 1.6 | 7.2 | 58.2 | - | 14.8 | 27.9 | 12.2 | 15.0 | 2.2 | 2.6 | 3.4 | 4.4 | 1.4 | 39.8 | - | 1.0 | 6.2 | 0.6 | 1.0 | 61.4 | 3.8 | 13.8 | 10.0 | 18.4 | |
| Rottnest Island | 2.0 | 0.2 | - | 3.6 | 17.2 | 1.6 | 12.8 | 0.4 | 2.8 | 8.6 | 5.2 | 12.6 | 2.6 | 3.6 | 0.8 | 0.8 | 8.0 | 8.2 | 0.8 | 1.0 | 31.8 | 0.4 | 0.4 | - | - | - | 28.2 | 1.2 | 5.2 | 5.4 | 1.2 | |
| Serpentine | 1.0 | 0.2 | 0.2 | 3.8 | 30.6 | 5.8 | 29.0 | 4.0 | 6.4 | 45.4 | 0.2 | 15.6 | 8.0 | 11.2 | 10.6 | 1.6 | 3.0 | 8.2 | 2.4 | 0.2 | 39.6 | - | 0.4 | 3.6 | 1.2 | 0.4 | 43.8 | 3.6 | 9.6 | 12.6 | 10.2 | |
| Swanbourne | 1.8 | - | - | 10.4 | 29.6 | 7.4 | 17.6 | 2.4 | 11.2 | 30.8 | 0.2 | 13.2 | 6.0 | 5.4 | 5.4 | 8.8 | 4.4 | 15.2 | 14.0 | 0.8 | 34.6 | 0.4 | 2.4 | 0.2 | - | - | 37.2 | 4.4 | 8.6 | 10.2 | 2.8 | |
| Wanneroo | 3.6 | 0.3 | → | → | → | 64.6 | 19.6 | 0.8 | 11.4 | → | → | 30.6 | 12.6 | 4.8 | 6.6 | 9.8 | → | → | 13.0 | 2.6 | 30.0 | 0.4 | - | → | → | 3.4 | 17.4 | 4.8 | 8.2 | 4.4 | ||
| Werribee | 0.6 | - | 0.2 | 0.2 | 40.6 | 2.0 | 22.4 | 3.8 | 5.6 | 26.4 | - | 14.4 | 25.8 | 7.0 | 12.4 | 0.6 | 0.6 | 1.4 | 4.0 | 2.6 | 18.8 | - | 1.0 | 1.2 | 1.0 | - | 34.0 | 1.6 | 10.0 | 14.2 | 11.2 | |
|
Most values are the precipitation in the 24 hours to 9 am on the day indicated.
Days marked with → are part of a longer accumulation, which is shown on the final day. Values over 100 mm have been rounded to the nearest whole millimetre. Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell). | ||||||||||||||||||||||||||||||||
| Rainfalls coloured according to the amount |
0 | 1.0 | 5.0 | 10.0 | 15.0 | 25.0 | 50.0 | 100 | 150 | 200 | 300 | 400 | 600 | millimetres | ||||||||||||||||||
Extremes Maps Records Summaries Daily observations 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 Greater Perth 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 summary includes data from observing sites in or near the Greater Perth “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.”
This statement has been prepared based on information available at 4 pm on Sunday 1 August 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
