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February is the hottest month in Perth, with an average high of 32°C / 89°F; July is the coldest (19°C / 65°F). July is the wettest month, averaging 142 mm / 5.6 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | 31 / 88 | 18 / 65 | 19 / 0.7 | 2 |
| Feb | 32 / 89 | 18 / 65 | 13 / 0.5 | 1 |
| Mar | 30 / 85 | 17 / 62 | 20 / 0.8 | 3 |
| Apr | 26 / 79 | 14 / 57 | 35 / 1.4 | 5 |
| May | 22 / 72 | 10 / 51 | 88 / 3.5 | 9 |
| Jun | 20 / 67 | 9 / 48 | 127 / 5.0 | 12 |
| Jul | 19 / 65 | 8 / 46 | 142 / 5.6 | 14 |
| Aug | 19 / 66 | 8 / 47 | 124 / 4.9 | 13 |
| Sep | 21 / 69 | 10 / 49 | 83 / 3.3 | 11 |
| Oct | 24 / 74 | 12 / 53 | 37 / 1.5 | 6 |
| Nov | 27 / 80 | 14 / 58 | 24 / 0.9 | 4 |
| Dec | 29 / 85 | 16 / 62 | 10 / 0.4 | 2 |
Extremes since 1750: highest 45°C / 112°F (February 26, 1997), lowest -1°C / 31°F (June 17, 2006).
Daylight lasts about 14.1 hours in December and 9.9 hours in June.
Data: Meteostat — Perth, 1991–2020 averages.
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