Monday, 1 November 2021 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in October 2021: very wet with cool daytime temperatures
October 2021 was very wet across Greater Perth. It was the wettest October on record at the Perth Metro site, and ranked the seventh-wettest October on record in Perth city's official records. Both mean maximum and minimum temperatures were below average for most sites.
Above average rainfall across Perth
- October rainfall doubled or tripled the monthly average for most sites, with totals in the 70–130 mm range, to 150–160 mm in the Perth hills.
- Several sites, mostly in the Perth hills, had their wettest October on record or wettest October for at least 20 years
- Perth Metro recorded a monthly rainfall total of 122.8 mm, which was its wettest October on record at the current site, and also ranked the seventh-wettest October on record, and wettest since 1965 in Perth city's official records commencing in 1876.
- Perth Metro recorded fourteen days of rain during October, which was above its October average of nine rain days; Perth Metro recorded daily rainfall at least 25 mm over two days (20th and 27th), which was a first for October at the Perth Metro site, and was only the fifth time in Perth city's official records. The last time the Perth city recorded a count of two days with at least 25 mm in October was 1965.
Below average daytime and night time temperatures
- Mean maximum temperatures were mostly 1–2 °C below average, and mean minimum temperatures were generally 0.5–1.5 °C below average.
- Perth Metro recorded a mean maximum temperature of 21.5 °C, which was 1.9 °C below average, and the second-lowest for October on record, behind the record low of 20.7 °C in 2005.
- Perth Metro recorded a mean minimum temperature of 10.4 °C, which was 1.2 °C below average, and the third-lowest for October on record, and the lowest since 2005.
Perth Metro
- Total rainfall for Perth Metro was 122.8 mm, which is 300% of the long-term average of 40.9 mm
- The warmest day was 33.2 °C on the 15th, and the coolest day was on the 25th when the temperature reached 17.6 °C
- The coldest morning was 4.7 °C on the 6th, and the warmest morning was on the 16th when the minimum temperature was 15.5 °C
Further information
- Media
- media@bom.gov.au (03) 9669 4057
Extremes Maps Records Summaries Daily observations Important notes the top
| Extremes in October 2021 | |
|---|---|
| Hottest day | 33.6 °C at Perth Airport on the 15th |
| Warmest days on average | 22.1 °C at Millendon (Swan Valley) |
| Coolest days on average | 18.7 °C at Bickley |
| Coldest day | 13.8 °C at Bickley on the 26th |
| Coldest night | 2.4 °C at Jandakot Aero on the 6th |
| Coolest nights on average | 7.7 °C at Karnet |
| Warmest nights on average | 13.4 °C at Rottnest Island |
| Warmest night | 17.7 °C at Mandurah on the 16th |
| Warmest on average overall | 16.6 °C at Rottnest Island |
| Coolest on average overall | 13.5 °C at Karnet |
| Wettest overall | 165.2 mm at Bickley |
| Wettest day | 44.6 mm at Swanbourne on the 1st |
| Strongest wind gust | 98 km/h at Rottnest Island on the 19th |
Extremes Maps Records Summaries Daily observations Important notes the top
| Record highest October daily rainfall | ||||||
|---|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
||||
| Anketell | 27.8 | on the 27th | 27.6 | on the 8th in 2007 | 20 | |
| Record highest October total rainfall | |||||
|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
Average for October |
||
| Pearce RAAF | 133.2 | 84.5 | in 1965 | 68 | 37.2 |
| Bickley | 165.2 | 142.4 | in 1977 | 53 | 67.2 |
| Roleystone | 153.8 | 144.0 | in 1965 | 53 | 63.2 |
| Maida Vale | 107.8 | 104.4 | in 1999 | 38 | 42.4 |
| Huntly | 156.0 | 155.4 | in 1999 | 29 | 70.4 |
| Perth Metro | 122.8 | 96.4 | in 1999 | 27 | 40.9 |
| Swanbourne | 129.4 | 106.2 | in 1995 | 27 | 45.1 |
| Pinjarra South | 83.8 | 75.6 | in 2002 | 21 | 37.3 |
| Anketell | 105.4 | 86.2 | in 2007 | 20 | 45.4 |
| Garden Island HSF | 83.8 | 59.8 | in 2005 | 20 | 29.3 |
| Mandurah | 75.2 | 71.2 | in 2007 | 20 | 32.5 |
| Highest October total rainfall for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (mm) |
Most recent higher |
Average for October |
|||
| Mundaring | 148.4 | 220.5 | in 1955* | 69.4 | |
| Chidlow | 121.7 | 159.3 | in 1955* | 53.3 | |
| Wanneroo | 114.7 | 122.5 | in 1965* | 47.3 | |
| Gidgegannup | 130.6 | 148.7 | in 1965* | 51.7 | |
| Perth Airport | 95.0 | 124.8 | in 1971 | 43.3 | |
| Karragullen North | 157.4 | 168.9 | in 1965* | 65.0 | |
| Jandakot Aero | 125.8 | 138.6 | in 1995 | 47.1 | |
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for October 2021 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for October 2021 |
Diff from average |
Highest for October 2021 |
Mean for October 2021 |
Diff from average |
Lowest for October 2021 |
Total for October 2021 |
Average for October |
Rank of October 2021 |
Fraction of October average |
|||
| Bickley | 18.7 | -2.6 | 30.6 | 15th | 8.7 | -1.1 | 4.5 | 6th | 165.2 | 67.2 | highest | 246% |
| Garden Island HSF | 19.5 | -1.6 | 31.9 | 15th | 12.4 | -1.3 | 8.2 | 6th | 83.8 | 29.3 | highest | 286% |
| Jandakot Aero | 21.3 | -1.7 | 32.7 | 15th | 9.6 | -0.3 | 2.4 | 6th | 125.8 | 47.1 | v high | 267% |
| Karnet | 18.9 | -2.0 | 28.8 | 15th | 7.7 | -1.4 | 3.5 | 4th | 118.4 | 75.5 | high | 157% |
| Mandurah | 19.9 | -2.1 | 31.8 | 15th | 12.4 | -1.1 | 7.3 | 6th | 75.2 | 32.5 | highest | 231% |
| Millendon (Swan Valley) | 22.1 | 33.0 | 15th | 9.3 | 3.7 | 7th | 76.2 | |||||
| Pearce RAAF | 22.0 | -1.6 | 33.1 | 15th | 9.7 | -0.5 | 3.5 | 7th | 133.2 | 37.2 | highest | 358% |
| Perth Airport | 21.8 | -1.0 | 33.6 | 15th | 9.7 | -0.6 | 3.3 | 6th | 95.0 | 43.3 | v high | 219% |
| Perth Metro | 21.5 | -1.9 | 33.2 | 15th | 10.4 | -1.2 | 4.7 | 6th | 122.8 | 40.9 | highest | 300% |
| Rottnest Island | 19.8 | -0.8 | 25.8 | 15th | 13.4 | -0.7 | 9.9 | 6th | 49.6 | 28.4 | high | 175% |
| Swanbourne | 20.2 | -2.1 | 33.0 | 15th | 11.6 | -0.9 | 6.3 | 6th | 129.4 | 45.1 | highest | 287% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for October 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 | 15.4 | 15.5 | 15.0 | 16.6 | 15.4 | 16.1 | 18.0 | 17.1 | 20.3 | 17.0 | 15.4 | 20.4 | 21.4 | 30.6 | 20.8 | 18.9 | 23.4 | 16.8 | 15.7 | 16.5 | 19.5 | 23.1 | 28.5 | 14.2 | 13.8 | 14.6 | 16.8 | 18.9 | 22.1 | 24.0 | |
| Garden Island HSF | 19.2 | 18.9 | 16.9 | 19.9 | 16.2 | 17.1 | 19.5 | 17.6 | 17.4 | 21.5 | 19.8 | 16.1 | 16.8 | 22.2 | 31.9 | 21.5 | 21.1 | 22.4 | 20.1 | 18.6 | 19.5 | 19.1 | 20.9 | 23.4 | 16.4 | 16.8 | 17.0 | 16.9 | 19.0 | 22.2 | 18.5 |
| Jandakot Aero | 19.8 | 19.8 | 18.7 | 20.1 | 18.0 | 18.0 | 19.9 | 19.6 | 19.9 | 22.4 | 21.3 | 18.1 | 21.0 | 23.9 | 32.7 | 22.2 | 21.9 | 24.0 | 21.6 | 19.8 | 20.3 | 21.7 | 25.0 | 28.7 | 16.9 | 17.7 | 18.2 | 19.2 | 21.2 | 24.3 | 23.1 |
| Karnet | 17.0 | 15.9 | 15.5 | 17.0 | 14.9 | 15.6 | 17.2 | 16.9 | 17.5 | 20.7 | 17.2 | 15.1 | 19.2 | 21.8 | 28.8 | 18.6 | 23.0 | 23.0 | 16.4 | 16.0 | 19.5 | 23.0 | 27.4 | 14.7 | 15.9 | 16.3 | 18.5 | 22.5 | 22.3 | ||
| Mandurah | 19.4 | 18.4 | 18.2 | 18.5 | 17.1 | 18.1 | 19.2 | 19.2 | 19.6 | 20.3 | 18.4 | 17.5 | 19.0 | 21.9 | 31.8 | 22.1 | 20.8 | 20.8 | 19.8 | 18.6 | 18.7 | 20.4 | 21.9 | 23.6 | 17.5 | 16.4 | 17.9 | 18.8 | 21.7 | 21.6 | |
| Millendon (Swan Valley) | 20.1 | 20.3 | 19.2 | 20.1 | 18.9 | 18.7 | 21.3 | 21.0 | 20.6 | 22.6 | 21.1 | 18.7 | 22.8 | 24.1 | 33.0 | 23.3 | 22.4 | 26.8 | 21.5 | 19.6 | 20.6 | 22.9 | 26.1 | 31.6 | 17.3 | 17.4 | 18.1 | 20.4 | 21.9 | 25.4 | 25.8 |
| Pearce RAAF | 19.2 | 20.0 | 19.0 | 20.1 | 18.7 | 18.4 | 20.9 | 20.3 | 20.1 | 23.2 | 21.0 | 18.1 | 22.4 | 24.2 | 33.1 | 22.6 | 22.6 | 26.9 | 21.7 | 21.1 | 21.3 | 22.2 | 26.3 | 32.0 | 17.9 | 17.5 | 18.7 | 19.9 | 21.8 | 25.5 | 25.8 |
| Perth Airport | 19.6 | 19.9 | 19.6 | 20.0 | 19.3 | 18.8 | 20.4 | 20.4 | 20.4 | 22.6 | 20.9 | 18.4 | 21.5 | 24.3 | 33.6 | 22.3 | 21.9 | 25.5 | 21.0 | 19.5 | 20.3 | 22.6 | 25.9 | 30.7 | 17.3 | 17.5 | 18.6 | 20.0 | 22.1 | 25.2 | 24.4 |
| Perth Metro | 19.5 | 20.0 | 18.9 | 20.4 | 18.4 | 18.6 | 20.1 | 20.2 | 20.1 | 22.2 | 20.4 | 17.8 | 20.9 | 24.5 | 33.2 | 22.1 | 22.3 | 24.3 | 20.8 | 20.4 | 20.4 | 22.2 | 25.9 | 28.6 | 17.6 | 17.9 | 18.1 | 20.0 | 21.1 | 24.9 | 23.9 |
| Rottnest Island | 19.3 | 19.3 | 18.7 | 20.2 | 17.5 | 17.6 | 20.2 | 19.0 | 18.4 | 20.7 | 20.3 | 16.8 | 17.6 | 20.9 | 25.8 | 20.9 | 21.3 | 22.2 | 20.2 | 20.1 | 19.8 | 19.3 | 22.2 | 24.9 | 17.2 | 17.0 | 17.8 | 17.5 | 18.8 | 21.8 | 19.3 |
| Swanbourne | 19.7 | 19.6 | 18.0 | 19.8 | 17.4 | 17.5 | 19.6 | 18.8 | 18.8 | 21.6 | 20.2 | 16.9 | 18.3 | 23.1 | 33.0 | 21.1 | 21.1 | 22.4 | 20.0 | 19.5 | 20.3 | 20.0 | 23.5 | 24.1 | 17.2 | 17.6 | 17.7 | 18.4 | 19.9 | 22.1 | 19.9 |
|
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 October 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 | 13.3 | 7.7 | 7.6 | 5.7 | 8.4 | 4.5 | 6.5 | 9.5 | 6.5 | 5.9 | 10.5 | 5.5 | 5.8 | 7.2 | 9.9 | 14.3 | 12.5 | 8.5 | 12.1 | 10.3 | 10.5 | 9.6 | 8.8 | 12.3 | 11.1 | 7.0 | 8.1 | 6.0 | 7.0 | 7.2 | 9.9 |
| Garden Island HSF | 16.3 | 13.1 | 14.0 | 9.9 | 12.4 | 8.2 | 9.0 | 13.5 | 11.6 | 10.3 | 14.2 | 9.8 | 10.4 | 11.4 | 13.3 | 15.0 | 17.2 | 10.2 | 14.9 | 14.8 | 15.2 | 12.6 | 12.2 | 15.2 | 14.2 | 9.2 | 10.3 | 11.2 | 10.7 | 10.9 | 14.0 |
| Jandakot Aero | 14.5 | 8.7 | 12.6 | 4.4 | 10.1 | 2.4 | 3.4 | 12.0 | 5.9 | 6.8 | 11.6 | 7.4 | 4.6 | 9.9 | 13.0 | 14.4 | 16.1 | 6.3 | 14.4 | 13.4 | 14.4 | 10.9 | 8.3 | 9.7 | 13.8 | 7.8 | 10.1 | 5.3 | 8.7 | 10.1 | 7.9 |
| Karnet | 6.8 | 8.8 | 3.5 | 7.1 | 3.6 | 9.1 | 6.8 | 6.1 | 9.4 | 4.2 | 4.1 | 8.0 | 11.3 | 5.5 | 12.5 | 11.0 | 9.8 | 8.1 | 9.0 | 9.8 | 11.5 | 6.3 | 4.8 | 6.5 | 6.9 | 9.5 | |||||
| Mandurah | 16.2 | 12.2 | 13.6 | 10.2 | 12.3 | 7.3 | 10.8 | 12.8 | 10.7 | 9.8 | 14.6 | 8.8 | 8.7 | 11.1 | 14.2 | 17.7 | 16.7 | 12.5 | 15.0 | 14.5 | 15.4 | 12.4 | 12.0 | 15.0 | 13.5 | 10.4 | 10.5 | 10.5 | 10.4 | 11.1 | 13.2 |
| Millendon (Swan Valley) | 12.9 | 9.4 | 7.8 | 4.6 | 9.9 | 4.7 | 3.7 | 12.7 | 6.2 | 7.0 | 10.9 | 7.2 | 4.4 | 10.2 | 13.1 | 14.4 | 12.7 | 7.1 | 14.7 | 13.5 | 9.9 | 11.8 | 8.6 | 9.8 | 13.3 | 7.4 | 9.3 | 5.5 | 8.1 | 10.8 | 7.3 |
| Pearce RAAF | 13.4 | 9.1 | 9.9 | 6.4 | 11.3 | 6.4 | 3.5 | 12.7 | 6.1 | 7.2 | 11.0 | 8.1 | 3.9 | 10.1 | 14.3 | 13.6 | 14.1 | 7.3 | 15.2 | 13.2 | 12.6 | 11.1 | 8.8 | 9.6 | 13.1 | 8.5 | 7.5 | 6.1 | 7.6 | 11.1 | 8.0 |
| Perth Airport | 14.8 | 9.3 | 11.1 | 6.2 | 9.7 | 3.3 | 4.0 | 12.6 | 5.2 | 6.6 | 11.1 | 7.2 | 4.4 | 11.0 | 13.8 | 15.5 | 12.8 | 8.8 | 14.7 | 13.4 | 11.5 | 10.5 | 8.5 | 10.3 | 13.7 | 8.0 | 10.1 | 5.2 | 8.0 | 11.0 | 7.4 |
| Perth Metro | 14.5 | 10.7 | 13.4 | 6.1 | 10.8 | 4.7 | 5.0 | 13.3 | 6.7 | 7.7 | 12.4 | 8.6 | 6.3 | 10.3 | 13.0 | 15.5 | 13.7 | 8.7 | 14.9 | 13.5 | 14.6 | 9.5 | 10.6 | 14.2 | 8.4 | 10.4 | 6.7 | 8.8 | 10.6 | 9.3 | |
| Rottnest Island | 16.6 | 12.6 | 13.6 | 12.2 | 13.5 | 9.9 | 12.1 | 14.1 | 13.0 | 11.7 | 15.0 | 10.9 | 11.1 | 12.2 | 14.9 | 17.6 | 16.0 | 14.6 | 15.5 | 13.6 | 14.9 | 13.3 | 13.5 | 15.9 | 14.4 | 10.7 | 10.7 | 11.7 | 11.4 | 12.3 | 14.5 |
| Swanbourne | 15.4 | 11.9 | 13.6 | 8.6 | 11.5 | 6.3 | 7.7 | 13.4 | 9.1 | 9.5 | 13.5 | 8.5 | 8.0 | 11.2 | 14.4 | 15.5 | 15.9 | 10.4 | 14.5 | 13.7 | 15.1 | 12.8 | 11.5 | 12.9 | 13.9 | 8.8 | 11.0 | 8.8 | 10.3 | 10.5 | 11.1 |
|
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 October 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 | 8.0 | 8.4 | 9.2 | 0.1 | 3.5 | - | - | 1.1 | - | - | - | 7.4 | - | - | - | - | - | - | 11.1 | 12.3 | 4.1 | 0.5 | - | - | 4.2 | 7.5 | 27.8 | 0.2 | - | - | - | |
| Araluen | 22.0 | 15.0 | 7.0 | 4.0 | 2.0 | - | 4.0 | - | - | - | 6.0 | - | - | - | - | - | - | - | 11.5 | 26.0 | 6.4 | 0.6 | - | - | - | 5.0 | ||||||
| Bickley | 7.8 | 22.6 | 10.6 | - | 4.0 | - | - | 1.6 | - | - | 10.6 | - | - | - | - | - | - | 14.4 | 33.6 | 7.6 | 1.0 | - | - | 6.2 | 4.2 | 33.2 | 7.8 | - | - | - | ||
| Bungendore | 26.6 | 20.8 | 1.4 | 0.2 | 3.8 | - | 0.2 | 3.0 | - | - | - | 11.6 | 0.2 | - | - | - | - | - | 12.8 | 21.4 | 8.2 | 4.0 | 38.2 | 1.0 | 0.2 | - | - | |||||
| Chidlow | 8.2 | 17.8 | → | 2.8 | 9.0 | - | - | 1.2 | - | - | - | 6.8 | - | - | - | - | - | - | 9.1 | 28.6 | 7.6 | - | - | → | 3.2 | 4.4 | 21.0 | 2.0 | - | - | ||
| Garden Island HSF | 8.8 | 1.8 | 3.6 | 5.2 | - | - | 1.4 | 0.2 | - | - | 4.8 | - | - | - | - | - | 10.4 | 7.6 | 3.0 | 2.8 | - | - | 4.0 | 10.6 | 19.6 | - | - | - | - | |||
| Gidgegannup | 4.2 | 23.4 | 7.4 | - | 4.8 | 0.2 | - | 4.6 | - | - | - | 5.4 | - | - | - | - | - | - | 13.0 | 28.0 | 7.8 | 4.6 | 25.0 | 2.2 | ||||||||
| Gosnells City | - | 10.4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||
| Huntly | 9.0 | 8.2 | 13.0 | - | 4.0 | 2.0 | - | 2.5 | - | - | - | 16.2 | - | - | - | - | - | - | 13.0 | 31.0 | 15.0 | 3.8 | 0.1 | - | 8.0 | 4.6 | 25.4 | - | 0.2 | - | - | |
| Jandakot Aero | 29.0 | 13.4 | 9.6 | - | 3.4 | - | - | 1.0 | - | - | - | 4.8 | - | - | - | - | - | - | 11.6 | 6.2 | 1.8 | 0.4 | - | - | 3.0 | 3.4 | 37.2 | 1.0 | - | - | - | |
| Jarrahdale | 12.0 | 18.0 | 12.2 | - | 3.4 | - | 0.2 | 2.0 | - | 0.2 | - | 9.8 | - | 0.2 | - | - | - | - | 13.8 | 21.0 | 10.0 | 6.2 | 21.8 | 0.4 | 0.2 | - | - | |||||
| Karnet | 10.9 | 4.6 | 6.7 | - | 4.9 | 0.1 | - | 3.2 | - | - | - | 13.6 | - | - | - | - | 14.1 | 21.1 | 11.4 | 2.8 | - | - | 3.6 | 4.8 | → | 16.6 | - | - | - | |||
| Karragullen North | 7.4 | 24.6 | 7.4 | - | 4.4 | - | - | 2.0 | - | - | - | 10.6 | - | - | - | - | - | - | 11.6 | 32.8 | 5.0 | - | - | - | 6.0 | 5.4 | 36.2 | 4.0 | ||||
| Maida Vale | 8.8 | 15.2 | - | - | 3.4 | - | - | 3.0 | - | - | - | 5.4 | - | - | - | - | - | - | 8.4 | 21.0 | 3.0 | - | - | - | 3.2 | 3.4 | 28.6 | 4.4 | ||||
| Mandurah | 1.0 | 7.8 | 5.0 | - | 2.0 | 0.2 | - | 0.2 | - | - | - | 7.2 | - | - | - | - | - | - | 12.2 | 5.8 | 4.2 | 1.0 | 0.2 | - | 3.0 | 3.6 | 21.8 | - | - | - | - | |
| Millendon (Swan Valley) | 0.8 | 0.8 | 0.8 | 0.4 | 1.2 | 0.8 | - | - | - | 4.2 | 0.2 | - | - | - | - | - | 8.2 | 18.4 | 5.8 | 0.4 | - | - | 5.0 | 1.6 | 20.4 | 7.0 | 0.2 | - | - | |||
| Mount Solus | 7.2 | 10.6 | 12.4 | - | 3.2 | 0.2 | - | 3.0 | - | - | - | 11.6 | - | 0.2 | - | - | 0.2 | - | 11.8 | 28.2 | 13.8 | 3.2 | 17.6 | 1.4 | 0.2 | - | - | |||||
| Muchea | 1.2 | 17.0 | 4.0 | - | 6.2 | 0.2 | - | 2.4 | - | - | - | 2.6 | 0.2 | - | - | - | - | - | 11.4 | 22.6 | 6.0 | 4.6 | 31.0 | 4.0 | - | - | - | |||||
| Mundaring | 5.0 | 21.6 | 6.0 | 0.2 | 5.4 | - | - | 2.6 | - | - | - | 9.2 | - | - | - | - | - | - | 11.4 | 41.4 | 9.6 | 0.6 | - | - | 8.2 | 5.0 | 22.2 | |||||
| Pearce RAAF | 1.0 | 22.6 | 4.0 | 0.2 | 4.4 | 0.4 | - | 2.0 | 0.2 | - | - | 4.2 | - | - | - | - | - | - | 12.0 | 29.2 | 8.4 | - | - | - | 2.4 | 4.6 | 32.4 | 5.2 | - | - | - | |
| Perth Airport | 3.2 | 12.2 | 5.4 | - | 3.2 | 0.2 | - | 1.2 | - | - | - | 6.2 | - | - | - | - | - | - | 7.8 | 24.0 | 4.2 | 0.6 | - | - | 2.0 | 3.6 | 18.4 | 2.8 | - | - | - | |
| Perth Metro | 8.4 | 15.4 | 5.6 | - | 4.2 | - | - | 4.6 | - | - | - | 7.4 | - | - | - | - | - | - | 11.2 | 26.4 | 1.6 | 2.2 | - | - | 2.6 | 5.4 | 26.8 | 1.0 | - | - | - | |
| Pinjarra South | 6.4 | 4.8 | 5.6 | - | 3.6 | - | - | 0.6 | 0.2 | - | - | 4.6 | 0.2 | - | - | - | - | - | 13.0 | 12.0 | 7.2 | 1.0 | 24.6 | - | - | - | - | |||||
| Roleystone | 14.0 | 25.2 | 7.8 | - | - | - | - | 6.6 | - | - | - | 6.6 | - | - | - | - | - | - | 11.8 | 24.2 | 4.8 | - | → | → | 8.2 | 3.6 | 41.0 | |||||
| Rottnest Island | 1.8 | 1.4 | 3.2 | - | 1.2 | 0.2 | - | 0.8 | 0.2 | - | - | 2.8 | 0.2 | - | - | - | - | - | 11.4 | 8.6 | 0.8 | 4.4 | - | - | - | 1.6 | 10.2 | 0.2 | - | 0.6 | - | |
| Serpentine | 4.0 | 9.6 | 10.8 | - | 3.8 | 0.2 | - | 1.4 | - | - | - | 7.6 | - | - | 5.8 | 11.4 | 0.8 | - | - | 0.8 | - | - | - | |||||||||
| Swanbourne | 44.6 | 10.2 | 2.4 | - | 4.0 | - | - | 5.0 | - | - | - | 5.2 | - | - | - | - | - | - | 13.0 | 17.0 | 2.4 | 2.4 | - | - | 1.0 | 6.4 | 14.2 | 1.6 | - | - | - | |
| Tamala Park (Mindarie) | 1.2 | 18.2 | 3.2 | - | 7.6 | - | - | 2.6 | - | - | - | 5.6 | 0.1 | - | - | - | - | - | 10.6 | 17.1 | 3.6 | 2.1 | - | - | 2.2 | 8.6 | 14.6 | 2.4 | ||||
| Wanneroo | 10.0 | - | - | 14.0 | 6.2 | 0.1 | - | 4.6 | - | - | - | 4.6 | - | - | - | - | - | - | 10.2 | 19.0 | 5.0 | - | → | → | → | 15.6 | 25.0 | 0.4 | - | - | - | |
| Werribee | 0.8 | 12.6 | 6.4 | - | 2.6 | 0.2 | - | 1.0 | - | - | - | 3.8 | 0.2 | - | - | - | - | - | 8.8 | 28.2 | 5.4 | 2.0 | 22.2 | 1.6 | - | - | - | |||||
| Whiteman Park | 6.0 | - | - | - | 9.6 | - | - | - | - | - | - | 2.8 | - | - | - | - | - | - | 8.8 | 22.9 | 4.6 | - | → | → | 4.0 | - | 21.0 | 3.4 | - | |||
|
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 12 pm on Monday 1 November 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
