Wednesday, 1 September 2021 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in August 2021: dry despite of above average numbers of rain day
August rainfall was below average across Greater Perth, and the Perth Metro site had the second-driest August on record. Both mean maximum and minimum temperatures were above average.
Below average rainfall
- Monthly rainfall was 40–80% of August average at most sites, with August rainfall totals in the 50–90 mm range, to 100–160 mm in the Perth hills.
- Perth Metro recorded 56.6 mm in total, which was the second-driest August on record at the Mount Lawley site, behind 2008 (27.8 mm); it was the eighth-driest August on record for the Perth city official records commencing in 1876.
- Perth Metro recorded 17 days with daily rainfall of at least 0.2 mm, which was above its August average of 16 rain days; daily rainfall totals in 16 of 17 days were less than 10 mm, with the exception of 11.8 mm on the 20th.
- Strong cold fronts produced damaging wind gusts in excess of 90 km/h recorded in Perth on the 1st and 10th; daily rainfall of 20-50 mm was recorded in the Perth hills on the 10th.
Above average temperatures
- Mean maximum temperatures were 0.5–1.0 °C above average at most sites, but were close to average in the Perth hills.
- The warmest days were on the 16th and 17th, with daily maximum temperatures mostly in the mid-20s.
- Mean minimum temperatures were mostly 0.5–1.5 °C above average.
- The warmest night was on the 17th with daily minima mostly in the mid-10s; Pearce RAAF had its highest daily minimum temperature in August on record.
Perth Metro
- The mean daily maximum temperature for Perth Metro was 19.6 °C, which is 0.5 °C above the long-term average of 19.1 °C, although August 2021 was cooler than August 2020.
- The warmest day was 25.1 °C on the 17th, and the coolest day was on the 10th when the temperature reached 14.4 °C.
- The mean daily minimum temperature for Perth Metro was 9.3 °C, which is 1.0 °C above the long-term average of 8.3 °C, and the warmest August nights since 2017.
- The coldest morning was 3.6 °C on the 6th, and the warmest morning was on the 9th when the minimum temperature was 13.8 °C.
Further information
- Media
- media@bom.gov.au (03) 9669 4057
Extremes Maps Records Summaries Daily observations Important notes the top
| Extremes in August 2021 | |
|---|---|
| Hottest day | 26.1 °C at Perth Airport on the 17th |
| Warmest days on average | 19.6 °C at Perth Metro |
| Coolest days on average | 16.0 °C at Bickley |
| Coldest day |
10.3 °C at Bickley on the 1st 10.3 °C at Bickley on the 10th |
| Coldest night | 2.1 °C at Jandakot Aero on the 2nd |
| Coolest nights on average | 7.2 °C at Karnet |
| Warmest nights on average | 12.6 °C at Rottnest Island |
| Warmest night | 16.9 °C at Rottnest Island on the 17th |
| Warmest on average overall | 15.6 °C at Rottnest Island |
| Coolest on average overall | 12.0 °C at Bickley |
| Wettest overall | 164.1 mm at Huntly |
| Wettest day | 45.8 mm at Mount Solus on the 10th |
| Strongest wind gust | 115 km/h at Rottnest Island on the 1st |
Extremes Maps Records Summaries Daily observations Important notes the top
| Record highest August daily minimum temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for August |
|||
| Pearce RAAF | 16.8 | on the 17th | 16.3 | on the 7th in 2013 | 62 | 8.2 |
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for August 2021 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for August 2021 |
Diff from average |
Highest for August 2021 |
Mean for August 2021 |
Diff from average |
Lowest for August 2021 |
Total for August 2021 |
Average for August |
Rank of August 2021 |
Fraction of August average |
|||
| Bickley | 16.0 | 0.0 | 22.8 | 17th | 8.1 | +0.5 | 4.5 | 24th | 110.4 | 174.9 | low | 63% |
| Garden Island HSF | 18.5 | +0.4 | 24.4 | 16th | 11.4 | +0.2 | 6.0 | 2nd | 67.0 | 94.3 | v low | 71% |
| Jandakot Aero | 19.2 | +0.5 | 25.3 | 16th | 8.6 | +1.4 | 2.1 | 2nd | 79.8 | 127.3 | low | 63% |
| Karnet | 16.3 | +0.3 | 22.9 | 17th | 7.2 | +0.9 | 2.4 | 4th | 135.0 | 183.3 | low | 74% |
| Mandurah | 18.2 | +0.1 | 25.0 | 16th | 11.5 | +0.5 | 6.5 | 2nd | 48.6 | 93.1 | v low | 52% |
| Millendon (Swan Valley) | 19.4 | 25.6 | 17th | 8.7 | 2.7 | 2nd | 66.2 | |||||
| Pearce RAAF | 19.3 | +0.9 | 25.5 | 17th | 9.6 | +1.4 | 3.9 | 2nd | 86.0 | 105.6 | low | 81% |
| Perth Airport | 19.5 | +0.9 | 26.1 | 17th | 9.2 | +1.1 | 2.9 | 2nd | 50.8 | 117.8 | v low | 43% |
| Perth Metro | 19.6 | +0.5 | 25.1 | 17th | 9.3 | +1.0 | 3.6 | 6th | 56.6 | 122.0 | v low | 46% |
| Rottnest Island | 18.6 | +0.7 | 23.7 | 16th | 12.6 | +0.2 | 7.2 | 2nd | 31.8 | 86.5 | lowest | 37% |
| Swanbourne | 19.0 | +0.1 | 25.3 | 16th | 10.9 | +0.8 | 6.0 | 5th | 61.2 | 115.7 | v low | 53% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for August 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 | 10.3 | 12.8 | 13.9 | 16.0 | 16.4 | 19.5 | 16.8 | 16.3 | 15.1 | 10.3 | 13.5 | 14.4 | 17.2 | 18.4 | 19.0 | 21.3 | 22.8 | 17.7 | 14.4 | 16.2 | 15.2 | 14.8 | 14.9 | 17.9 | 21.1 | 15.7 | 14.2 | 14.3 | 15.4 | 15.2 | |
| Garden Island HSF | 14.8 | 16.2 | 17.3 | 16.7 | 19.6 | 20.9 | 19.0 | 19.8 | 18.6 | 14.6 | 17.8 | 15.7 | 19.2 | 17.6 | 22.1 | 24.4 | 21.3 | 19.0 | 19.0 | 18.0 | 18.0 | 16.1 | 18.4 | 20.9 | 21.4 | 18.3 | 16.2 | 17.3 | 19.3 | 18.2 | 19.3 |
| Jandakot Aero | 14.6 | 16.1 | 17.2 | 18.8 | 19.5 | 22.3 | 19.1 | 19.7 | 19.6 | 14.1 | 17.3 | 17.2 | 20.2 | 20.0 | 22.6 | 25.3 | 24.0 | 18.7 | 19.1 | 18.4 | 17.4 | 17.9 | 21.0 | 23.7 | 18.8 | 17.4 | 17.7 | 19.4 | 19.1 | 19.7 | |
| Karnet | 10.9 | 13.2 | 14.2 | 17.9 | 20.1 | 17.9 | 15.1 | 10.4 | 14.9 | 14.2 | 17.6 | 17.8 | 19.3 | 22.5 | 22.9 | 18.0 | 17.8 | 15.4 | 14.6 | 14.6 | 15.5 | 18.5 | 16.2 | 14.5 | 14.7 | 16.5 | 16.2 | ||||
| Mandurah | 15.1 | 14.7 | 15.9 | 18.1 | 18.5 | 18.9 | 17.7 | 19.1 | 17.7 | 14.0 | 17.8 | 16.4 | 18.5 | 18.8 | 22.1 | 25.0 | 19.7 | 19.4 | 18.4 | 18.0 | 18.1 | 16.9 | 18.5 | 20.8 | 19.4 | 18.1 | 16.7 | 17.0 | 18.8 | 18.0 | 18.8 |
| Millendon (Swan Valley) | 14.7 | 14.8 | 17.5 | 18.9 | 19.8 | 21.4 | 18.0 | 19.8 | 18.5 | 14.5 | 16.6 | 19.6 | 20.8 | 21.2 | 21.6 | 24.5 | 25.6 | 20.9 | 18.3 | 19.3 | 18.5 | 18.5 | 17.8 | 20.4 | 24.4 | 19.0 | 18.3 | 18.3 | 20.1 | 19.1 | 20.9 |
| Pearce RAAF | 14.6 | 14.3 | 16.8 | 18.9 | 19.6 | 21.6 | 18.5 | 19.6 | 18.4 | 14.2 | 16.6 | 19.4 | 20.3 | 20.4 | 21.6 | 24.0 | 25.5 | 20.7 | 19.1 | 19.2 | 19.1 | 18.0 | 17.8 | 20.5 | 24.1 | 19.1 | 17.8 | 17.4 | 20.4 | 19.0 | 21.0 |
| Perth Airport | 15.0 | 15.4 | 18.0 | 19.3 | 19.6 | 22.3 | 18.3 | 19.8 | 19.2 | 14.5 | 17.4 | 18.1 | 20.9 | 21.1 | 22.4 | 25.1 | 26.1 | 20.7 | 18.3 | 18.9 | 18.8 | 18.8 | 18.2 | 21.1 | 24.7 | 19.3 | 18.0 | 17.9 | 19.0 | 19.3 | 20.5 |
| Perth Metro | 15.1 | 15.4 | 17.6 | 19.3 | 19.6 | 22.4 | 18.5 | 19.5 | 19.4 | 14.4 | 17.5 | 18.0 | 20.9 | 20.8 | 22.6 | 24.9 | 25.1 | 20.7 | 18.7 | 19.0 | 18.4 | 18.5 | 21.1 | 24.7 | 19.5 | 17.8 | 18.7 | 19.4 | 19.9 | 20.5 | |
| Rottnest Island | 15.3 | 15.4 | 16.8 | 17.8 | 19.0 | 20.7 | 19.5 | 19.8 | 19.1 | 14.9 | 18.2 | 16.6 | 18.7 | 17.6 | 20.4 | 23.7 | 22.1 | 19.8 | 18.7 | 18.6 | 18.6 | 16.5 | 17.3 | 20.1 | 20.9 | 18.8 | 17.4 | 17.4 | 19.0 | 18.7 | 19.5 |
| Swanbourne | 14.5 | 15.6 | 17.3 | 17.8 | 19.7 | 22.3 | 19.2 | 19.6 | 18.9 | 14.3 | 17.7 | 18.2 | 19.7 | 18.6 | 22.9 | 25.3 | 21.3 | 19.0 | 18.4 | 19.3 | 18.3 | 17.7 | 18.3 | 21.1 | 22.6 | 18.6 | 17.6 | 17.4 | 19.1 | 19.2 | 19.7 |
|
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 August 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 | 7.0 | 5.5 | 7.5 | 6.6 | 5.0 | 5.7 | 9.7 | 10.0 | 10.8 | 6.9 | 5.3 | 7.9 | 6.5 | 8.7 | 7.3 | 7.9 | 11.6 | 12.4 | 9.8 | 8.9 | 9.4 | 8.3 | 4.9 | 4.5 | 6.6 | 10.5 | 7.4 | 7.0 | 9.9 | 10.9 | 11.6 |
| Garden Island HSF | 10.9 | 6.0 | 9.6 | 7.0 | 7.4 | 8.9 | 12.4 | 13.9 | 14.8 | 11.0 | 9.8 | 11.0 | 7.9 | 7.1 | 10.6 | 13.3 | 14.2 | 12.3 | 11.8 | 13.1 | 14.4 | 13.3 | 9.1 | 9.7 | 13.0 | 14.8 | 13.8 | 10.0 | 13.2 | 14.4 | 15.1 |
| Jandakot Aero | 9.2 | 2.1 | 7.5 | 5.0 | 3.2 | 2.5 | 6.8 | 12.2 | 13.8 | 10.1 | 5.8 | 8.0 | 3.5 | 2.8 | 6.4 | 13.0 | 14.0 | 10.0 | 9.4 | 10.0 | 10.2 | 11.2 | 5.9 | 7.2 | 10.8 | 10.7 | 10.8 | 7.4 | 12.2 | 13.8 | 12.2 |
| Karnet | 4.4 | 7.5 | 3.5 | 2.4 | 3.5 | 6.2 | 11.0 | 6.8 | 3.9 | 7.5 | 5.9 | 3.0 | 6.6 | 9.5 | 12.0 | 11.9 | 8.0 | 7.4 | 8.7 | 8.4 | 4.0 | 5.5 | 9.0 | 6.5 | 5.0 | 10.5 | 11.4 | 11.7 | |||
| Mandurah | 9.8 | 6.5 | 9.2 | 8.0 | 7.9 | 8.8 | 13.4 | 14.1 | 14.2 | 10.6 | 9.4 | 11.8 | 10.1 | 8.6 | 10.6 | 12.3 | 16.2 | 14.3 | 12.8 | 13.1 | 13.3 | 13.1 | 8.3 | 8.9 | 12.9 | 13.8 | 11.6 | 10.8 | 13.0 | 14.1 | 14.9 |
| Millendon (Swan Valley) | 9.6 | 2.7 | 7.8 | 5.3 | 4.2 | 3.6 | 9.7 | 11.9 | 12.6 | 10.5 | 5.5 | 7.8 | 4.9 | 3.4 | 7.3 | 11.7 | 15.2 | 12.8 | 7.2 | 10.3 | 8.9 | 9.7 | 6.4 | 7.6 | 12.6 | 12.7 | 6.3 | 6.4 | 11.0 | 11.2 | 11.7 |
| Pearce RAAF | 9.7 | 3.9 | 9.0 | 7.2 | 6.9 | 5.5 | 12.6 | 11.7 | 13.0 | 9.3 | 5.8 | 9.7 | 7.6 | 3.9 | 8.4 | 13.4 | 16.8 | 12.4 | 8.0 | 10.0 | 9.1 | 11.5 | 7.6 | 9.0 | 11.7 | 12.1 | 9.0 | 8.5 | 11.1 | 11.6 | 12.3 |
| Perth Airport | 9.5 | 2.9 | 8.6 | 4.9 | 5.6 | 8.2 | 10.5 | 11.4 | 13.1 | 9.8 | 6.4 | 8.4 | 7.9 | 3.3 | 8.5 | 10.8 | 15.9 | 13.2 | 8.0 | 10.0 | 9.2 | 9.8 | 6.1 | 8.4 | 11.7 | 12.2 | 8.7 | 6.7 | 11.4 | 12.7 | 11.9 |
| Perth Metro | 9.7 | 3.7 | 8.8 | 6.3 | 3.8 | 3.6 | 6.5 | 11.8 | 13.8 | 9.7 | 6.8 | 9.0 | 5.1 | 4.1 | 7.1 | 11.1 | 13.3 | 11.3 | 9.8 | 11.4 | 9.7 | 12.1 | 5.3 | 7.8 | 12.6 | 12.5 | 12.6 | 9.4 | 12.1 | 13.7 | 12.9 |
| Rottnest Island | 10.7 | 7.2 | 10.7 | 12.1 | 11.2 | 12.3 | 14.7 | 14.5 | 13.8 | 10.5 | 8.7 | 12.0 | 12.2 | 12.6 | 12.1 | 13.5 | 16.9 | 15.5 | 14.6 | 13.8 | 13.4 | 13.2 | 10.4 | 10.8 | 13.0 | 13.9 | 12.2 | 12.2 | 13.6 | 14.0 | 14.2 |
| Swanbourne | 9.5 | 6.2 | 8.6 | 8.0 | 6.0 | 6.9 | 11.5 | 12.6 | 13.6 | 9.7 | 8.3 | 10.4 | 7.8 | 7.5 | 9.3 | 12.9 | 16.2 | 13.4 | 11.1 | 11.9 | 14.3 | 13.2 | 7.3 | 8.9 | 12.1 | 14.1 | 13.2 | 10.4 | 13.6 | 14.4 | 14.4 |
|
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 |
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| Daily rainfall for August 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 | 10.6 | 6.4 | 0.2 | - | - | - | - | 1.1 | 5.9 | 14.7 | 3.8 | 1.8 | 0.2 | - | - | - | - | - | 4.2 | 12.3 | 5.9 | 1.7 | 0.1 | - | - | 1.6 | 5.2 | 0.8 | 2.3 | 6.3 | 2.7 | |
| Bickley | 21.2 | 1.4 | - | - | 0.2 | - | 5.4 | 12.8 | 21.2 | 8.0 | 0.4 | 0.2 | - | 0.2 | - | 0.2 | 0.2 | 0.8 | 10.6 | 1.6 | 3.2 | 0.2 | - | - | 3.0 | 5.4 | - | 3.2 | 7.6 | 3.4 | ||
| Bungendore | 11.4 | 4.0 | 0.2 | 0.2 | 0.2 | 0.2 | - | 2.4 | 11.0 | 20.8 | 3.8 | 1.4 | 0.4 | 0.2 | - | - | - | - | 2.2 | 7.8 | 4.0 | 2.6 | 0.2 | - | - | 1.8 | 4.4 | - | 2.0 | 5.8 | 3.4 | |
| Chidlow | → | 20.1 | 0.2 | - | - | - | - | → | 17.2 | 26.2 | 5.1 | 0.6 | - | - | - | - | - | 0.2 | 0.2 | 5.0 | 0.1 | → | 3.2 | - | - | 0.8 | 1.5 | - | → | 4.4 | 2.1 | |
| Garden Island HSF | 7.2 | 2.8 | - | 0.2 | - | - | - | 1.4 | 4.2 | 9.6 | 3.0 | 1.8 | 2.2 | 0.2 | - | - | - | - | 4.4 | 16.4 | 2.8 | 0.2 | - | - | - | 2.0 | 0.4 | 0.6 | 2.0 | 4.6 | 1.0 | |
| Gidgegannup | 18.4 | 2.4 | - | - | - | - | - | 3.6 | 11.6 | 19.8 | 5.0 | 0.4 | - | - | 0.2 | - | - | 0.2 | 0.2 | 12.6 | 1.0 | 3.2 | - | - | - | 0.8 | 2.2 | - | 0.8 | 2.8 | 3.8 | |
| Huntly | 29.8 | 6.8 | 0.4 | - | - | - | - | 3.2 | 15.1 | 35.0 | 7.0 | 1.2 | 0.2 | - | - | - | 0.6 | - | 7.0 | 4.2 | 6.6 | 4.4 | - | - | - | 6.4 | 7.6 | 1.0 | 7.0 | 12.0 | 8.6 | |
| Jandakot Aero | 9.6 | 4.8 | 0.2 | - | - | - | - | 1.6 | 8.4 | 12.8 | 5.4 | 0.8 | 0.2 | - | - | - | - | 2.4 | 11.2 | 2.4 | 3.0 | - | - | - | 3.4 | 3.6 | 0.2 | 1.2 | 4.2 | 4.4 | ||
| Jarrahdale | 13.6 | 5.0 | 0.2 | 0.4 | - | 0.4 | - | 1.2 | 16.0 | 21.4 | 8.0 | 5.4 | 1.4 | 0.4 | 0.2 | - | - | - | 2.4 | 20.6 | 7.0 | 6.4 | 0.2 | 0.2 | - | 2.6 | 7.0 | - | 7.2 | 12.2 | 8.0 | |
| Karnet | 19.5 | 4.1 | - | - | - | - | - | → | 16.8 | 31.0 | 8.4 | 2.2 | 3.6 | - | - | - | - | 0.1 | 7.4 | 5.8 | 3.8 | 7.5 | - | - | - | 0.8 | - | 6.0 | 10.2 | 7.8 | ||
| Karragullen North | 17.2 | 5.6 | 0.2 | - | - | - | - | 4.6 | 12.6 | 31.8 | 9.8 | - | - | - | - | - | - | 1.8 | 0.6 | 13.4 | 3.0 | 3.4 | - | - | - | 3.4 | 4.6 | 0.1 | 1.4 | 6.4 | 4.0 | |
| Maida Vale | 14.2 | 3.6 | - | - | - | - | - | 4.4 | 5.0 | 9.2 | 9.4 | 1.0 | - | - | - | - | - | - | 2.0 | 17.8 | 0.8 | 1.0 | - | - | - | 2.0 | 1.6 | - | 2.6 | 2.6 | 2.0 | |
| Mandurah | 5.2 | - | 0.6 | - | - | - | - | 3.0 | 1.2 | 4.2 | 3.0 | 3.8 | - | - | - | - | - | - | 8.4 | 0.6 | 3.0 | 1.4 | - | - | - | 2.2 | 2.4 | 1.0 | 5.6 | 2.4 | 0.6 | |
| Millendon (Swan Valley) | 9.4 | 5.4 | - | - | - | - | - | 4.2 | 3.0 | 15.2 | 6.6 | 0.6 | 0.2 | - | - | - | - | 1.2 | 0.8 | 9.0 | 1.6 | 1.4 | - | - | - | 0.8 | 2.4 | - | 0.4 | 2.8 | 1.2 | |
| Mount Solus | 16.0 | 5.6 | 0.2 | - | 0.2 | - | - | 1.2 | 15.0 | 45.8 | 7.2 | 2.0 | 3.2 | 0.2 | - | - | - | - | 7.0 | 10.6 | 2.6 | 5.8 | 0.2 | - | 0.2 | 2.2 | 6.0 | 0.4 | 3.4 | 11.8 | 5.4 | |
| Muchea | 11.8 | 5.2 | - | - | - | - | 0.2 | 4.4 | 7.6 | 21.6 | 5.0 | 1.2 | 0.2 | - | - | 0.2 | - | 0.4 | 0.2 | 19.8 | 0.2 | 1.4 | - | - | - | 1.6 | 3.6 | 0.2 | 0.6 | 1.8 | 0.4 | |
| Mundaring | 11.0 | 4.8 | 0.4 | - | - | - | - | 5.2 | 12.0 | 19.6 | 6.2 | - | - | - | - | - | - | 2.0 | 0.8 | 7.0 | → | 4.3 | - | - | - | 2.0 | 6.2 | - | 2.6 | - | 2.8 | |
| Pearce RAAF | 16.2 | 7.0 | - | - | - | - | - | 3.2 | 10.6 | 16.0 | 5.2 | 0.4 | 0.2 | - | - | - | - | - | 0.2 | 19.6 | - | 1.2 | 0.4 | - | - | 0.8 | 2.6 | - | 0.2 | 1.8 | 0.4 | |
| Perth Airport | 9.0 | 0.8 | - | - | - | - | - | 3.8 | 4.0 | 10.0 | 3.2 | 0.8 | - | - | - | - | - | 0.4 | 1.4 | 8.4 | 0.2 | 0.6 | - | - | - | 1.6 | 1.6 | 0.2 | 2.0 | 2.0 | 0.8 | |
| Perth Metro | 8.8 | 2.6 | - | - | - | - | - | 3.8 | 5.2 | 6.4 | 4.2 | 1.2 | - | - | - | - | 0.2 | 1.2 | 1.0 | 11.8 | 0.8 | - | - | - | 0.6 | 2.4 | - | 2.4 | 2.8 | 1.2 | ||
| Pinjarra South | 18.6 | 3.6 | 0.4 | - | - | - | - | 0.8 | 9.4 | 15.4 | 6.6 | 2.0 | - | - | - | - | - | - | 8.0 | 1.6 | 5.2 | 1.4 | - | - | - | 2.4 | 4.2 | 0.6 | 4.2 | 5.4 | 0.6 | |
| Roleystone | 17.6 | 5.6 | - | - | - | - | - | 4.8 | 13.8 | 21.8 | 7.6 | 2.0 | - | - | - | - | - | 0.8 | 0.8 | 15.0 | 4.0 | - | - | - | - | 5.4 | - | → | 5.0 | 3.4 | 4.2 | |
| Rottnest Island | 2.0 | 5.2 | 1.6 | 0.2 | - | - | - | 1.2 | 3.4 | 5.2 | 1.8 | 1.0 | 0.4 | 0.2 | - | - | - | - | 0.4 | 2.2 | 0.4 | 0.8 | 0.2 | - | - | 1.2 | 0.6 | 0.2 | 1.8 | 0.2 | 1.6 | |
| Serpentine | 13.0 | 4.2 | - | 0.2 | - | - | - | 0.2 | 5.4 | 13.4 | 5.0 | 9.2 | 1.0 | - | - | - | 0.4 | - | 3.2 | 8.8 | 5.6 | 3.6 | 0.2 | - | - | 2.4 | 3.6 | 0.2 | 7.8 | 7.6 | 4.2 | |
| Swanbourne | 8.4 | 2.8 | 0.4 | - | - | - | - | 3.6 | 3.2 | 10.8 | 3.8 | 1.8 | 0.2 | - | - | - | - | 0.6 | 4.8 | 13.0 | 0.6 | 0.6 | - | - | - | 1.2 | 1.4 | 0.2 | 1.2 | 1.2 | 1.4 | |
| Tamala Park (Mindarie) | 6.4 | 4.4 | 0.2 | - | - | - | - | 4.4 | 2.2 | 13.8 | 2.2 | 0.5 | - | - | - | - | - | 2.8 | 9.4 | 17.2 | 0.2 | 2.0 | - | - | - | 1.6 | 1.6 | 0.2 | - | 1.4 | 1.2 | |
| Wanneroo | → | → | 22.0 | - | - | - | → | → | 6.6 | 20.2 | 4.4 | 0.8 | 0.2 | - | - | - | 0.5 | 2.2 | - | 25.4 | - | - | 1.4 | - | - | 2.4 | 4.0 | → | → | → | 3.8 | |
| Werribee | 16.8 | 3.0 | 0.6 | - | - | 0.2 | - | 3.2 | 11.6 | 20.0 | 7.0 | 0.2 | 0.4 | - | 0.2 | - | - | - | 0.2 | 5.8 | 0.2 | 2.0 | 0.2 | - | - | 0.2 | 1.6 | - | 0.2 | 2.6 | 2.6 | |
| 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 9 am on Wednesday 1 September 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
