Perth, Australia Climate & Monthly Averages
The climate of Perth
Weather in Perth is shaped by its Mediterranean climate - expect hot, dry summers and mild, wetter winters. February afternoons typically reach 86°F (30°C), while August highs hover near 64°F (18°C). Annual precipitation averages 25.3 inches (642 mm) over about 82 rainy days.
Climate quick facts
- Hottest month: February - highs near 86°F (30°C)
- Coldest month: August - highs near 64°F (18°C)
- Record high: 112°F (44°C) · Record low: 38°F (3°C) (2015–2024)
- Wettest month: July (15 rainy days) · Sunniest: December (13.4 h sun/day)
- Climate type: Mediterranean - hot, dry summers and mild, wetter winters
Temperatures through the year
The warmest stretch of the year centers on February. Highs average 86°F (30°C) and overnight lows stay near 67°F (19°C). The coolest month is August, with typical highs of 64°F (18°C) and lows around 50°F (10°C). Based on 2015–2024 weather data, temperatures have reached as high as 112°F (44°C) and dropped as low as 38°F (3°C).
Rain, sun and snow
July is usually the wettest month. It brings about 4.6 inches (117 mm) of rain over 15 days, while December is the driest. December brings the most sunshine, averaging 13.4 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 86° | 66° | 2 | 0.9 in | 12.8 h/day | 53% |
| February | 86° | 67° | 2 | 0.8 in | 12.3 h/day | 56% |
| March | 83° | 65° | 5 | 1.6 in | 10.9 h/day | 60% |
| April | 76° | 59° | 6 | 1.6 in | 10.0 h/day | 65% |
| May | 70° | 54° | 8 | 3.1 in | 9.0 h/day | 69% |
| June | 65° | 51° | 12 | 4.1 in | 8.5 h/day | 75% |
| July | 63° | 51° | 15 | 4.6 in | 8.4 h/day | 76% |
| August | 64° | 50° | 13 | 4.2 in | 9.5 h/day | 75% |
| September | 67° | 51° | 7 | 1.7 in | 10.8 h/day | 72% |
| October | 71° | 55° | 6 | 1.5 in | 11.4 h/day | 68% |
| November | 78° | 59° | 4 | 0.9 in | 12.9 h/day | 61% |
| December | 83° | 64° | 2 | 0.3 in | 13.4 h/day | 54% |
Perth month by month
Perth weather in January
January brings highs around 86°F (30°C), lows near 66°F (19°C), about 2 wet days.
Perth weather in February
February brings highs around 86°F (30°C), lows near 67°F (19°C), about 2 wet days - typically the hottest month of the year in Perth.
Perth weather in March
March brings highs around 83°F (28°C), lows near 65°F (18°C), about 5 wet days.
Perth weather in April
April brings highs around 76°F (25°C), lows near 59°F (15°C), about 6 wet days.
Perth weather in May
May brings highs around 70°F (21°C), lows near 54°F (12°C), about 8 wet days.
Perth weather in June
June brings highs around 65°F (18°C), lows near 51°F (11°C), about 12 wet days.
Perth weather in July
July brings highs around 63°F (17°C), lows near 51°F (10°C), about 15 wet days - typically the wettest month of the year in Perth.
Perth weather in August
August brings highs around 64°F (18°C), lows near 50°F (10°C), about 13 wet days - typically the coldest month of the year in Perth.
Perth weather in September
September brings highs around 67°F (19°C), lows near 51°F (11°C), about 7 wet days.
Perth weather in October
October brings highs around 71°F (22°C), lows near 55°F (13°C), about 6 wet days.
Perth weather in November
November brings highs around 78°F (25°C), lows near 59°F (15°C), about 4 wet days.
Perth weather in December
December brings highs around 83°F (28°C), lows near 64°F (18°C), about 2 wet days - typically the driest month and the sunniest month of the year in Perth.
Seasons in Perth
Spring (September through November)
Spring in Perth is pleasantly warm, with daytime highs averaging 72°F (22°C) and nights around 55°F (13°C); rain falls on about 18 days over the three months.
Summer (December through February)
Summer in Perth runs hot, with daytime highs averaging 85°F (30°C) and nights around 65°F (19°C); precipitation is infrequent.
Fall (March through May)
Fall in Perth brings comfortable warmth, with daytime highs averaging 76°F (25°C) and nights around 59°F (15°C); expect showers on roughly 18 days across the season.
Winter (June through August)
Winter in Perth is crisp but comfortable, with daytime highs averaging 64°F (18°C) and nights around 51°F (10°C); expect showers on roughly 41 days across the season.
Climate questions, answered
What is the average temperature in Perth?
Is Perth hot in summer?
Is Perth cold in winter?
How many rainy days does Perth get in a year?
Best time to visit Perth
The best time to visit Perth is generally March to May and September to November, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 74°F (23°C).
Pack for Perth with lightweight, breathable clothing and strong sun protection for the hot months; rain gear if you travel around July. Evenings can feel noticeably cooler than afternoons - February nights average 67°F (19°C).
Perth temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.