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Perth climate by month
What the weather is like
Perth has a hot-summer Mediterranean climate (Köppen Csa): dry, sunny summers and mild, wetter winters.
The warmest month is February, when afternoons average 31° and nights 19°. July is the coolest month, with highs of 17° and lows of 10°. The difference between the warmest and the coolest month is about 12°.
About 781 mm of precipitation falls in an average year. July is the wettest month (157 mm, 16 wet days) and December the driest (8 mm, 1 wet days). Cloud cover ranges from 13% in January to 29% in May.
The sea reaches about 22° in February. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Canberra, the capital, Perth is 4.8° warmer on a February afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 31° · February
- Coldest nights
- 10° · July
- Wettest month
- July
- Driest month
- December
- Clearest skies
- January · 13% cloud
- Warmest sea
- 22° · February
- Longest day
- 14 h 13 min
- Shortest day
- 10 h 04 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 30° | 31° | 29° | 25° | 21° | 18° | 17° | 17° | 19° | 21° | 25° | 28° |
| Average low | 19° | 19° | 17° | 15° | 13° | 11° | 10° | 10° | 11° | 12° | 15° | 17° |
| Precipitation | 12 mm | 15 mm | 22 mm | 39 mm | 102 mm | 162 mm | 157 mm | 126 mm | 75 mm | 37 mm | 26 mm | 8 mm |
| Wet days (≥1 mm) | 1 | 2.5 | 3 | 4.7 | 8 | 12.3 | 15.7 | 12.5 | 8 | 6.3 | 3.7 | 0.7 |
| Cloud cover | 13% | 15% | 18% | 25% | 29% | 28% | 29% | 28% | 27% | 23% | 21% | 16% |
| Sea temperature | 22° | 22° | 22° | 22° | 22° | 21° | 20° | 19° | 19° | 19° | 20° | 21° |
| Daylight | 14h 01 | 13h 14 | 12h 19 | 11h 20 | 10h 31 | 10h 04 | 10h 14 | 10h 56 | 11h 52 | 12h 50 | 13h 44 | 14h 13 |
| Month score | 75 | 71 | 78 | 89 | 81 | 69 | 60 | 65 | 81 | 85 | 91 | 87 |