- Sunshine hrs/yr
- 3,200
Updated July 2026 · Sources cited: en.wikipedia.org, climatestotravel.com
Good to know
Good to Know
- April–May and September–October offer the best balance of weather and outdoor activities without extreme heat.
- December–February has intense summer heat (up to 40°C (104°F)+); the 'Fremantle Doctor' afternoon sea breeze is essential relief.
- Winter (June–August) brings the bulk of annual rainfall and shortest daylight (~10 hours in June); many houses lack heating.
- March–April see remnants of ex-tropical cyclones, bringing heavy rain and strong winds more often than January–February.
- Perth has extreme UV exposure in summer; SPF30+ sunscreen and sun-smart clothing essential year-round.
- Sea temperatures are coolest in winter (19.4°C (67°F)); December–January are best for swimming at 22–23°C (73°F).
Seasons
Autumn
- Months
- March–May
- Summary
- Warm, sunny days and cooler nights. May sees significant rainfall increase and can get quite cold. March–April common for ex-tropical cyclone remnants.
- Rainfall Mm
- 54
- Temp Low Celsius
- 13.7
- Temp High Celsius
- 26
- Temp Low Fahrenheit
- 57
- Temp High Fahrenheit
- 79
Spring
- Months
- September–November
- Summary
- Warm, sunny days with little rainfall. Temperatures rise and rainfall lessens as spring progresses. Wildflower bloom peaks during this season.
- Rainfall Mm
- 40
- Temp Low Celsius
- 11.7
- Temp High Celsius
- 23
- Temp Low Fahrenheit
- 53
- Temp High Fahrenheit
- 73
Summer
- Months
- December–February
- Summary
- Hot and dry with very little rainfall. Afternoon sea breeze called 'Fremantle Doctor' provides relief. Heat waves common, especially in March (extending into late summer).
- Rainfall Mm
- 43
- Temp Low Celsius
- 18.4
- Temp High Celsius
- 31.7
- Temp Low Fahrenheit
- 65
- Temp High Fahrenheit
- 89
Winter
- Months
- June–August
- Summary
- Relatively cool and wet. Rainfall concentrates here: 77.7% of annual rain falls May–September. July is coldest and wettest month.
- Rainfall Mm
- 109
- Temp Low Celsius
- 8.1
- Temp High Celsius
- 18
- Temp Low Fahrenheit
- 47
- Temp High Fahrenheit
- 64
Snowfall
- Occurs
- No
- Note
- Perth has never recorded snow on the ground
Sea Temperature
- Warmest Months
- January–May
- Coolest Celsius
- 19.4
- Warmest Celsius
- 22.8
- Coolest Fahrenheit
- 67
- Warmest Fahrenheit
- 73
- Note
- Sea is never warm for swimming but becomes acceptable January–May.
Sunshine And UV
- Annual Hours
- 3200
- Daily Average
- 8.8
- UV Note
- January, February, December have extreme UV (index 12–14). May–July are moderate/high (index up to 6).
Sunniest Months
- October–December
Climate Classification
Mediterranean (Köppen Csa) – hot, dry summers and mild, wet winters
Peak And Driest Months
- Driest Month Detail
- December: only 12 mm rainfall, 4 rainy days
- Wettest Month Detail
- July: 100–145 mm rainfall, 12–15 rainy days
Best To Visit
- Reason
- Pleasant temperatures (19–27°C (66–81°F)), moderate rainfall, and fewer extreme heat events. Balance of good weather and outdoor activities.
Months
- April–May
- September–October
Driest Months
- December–February
Wettest Months
- June–August
AI-generated estimateData refreshed July 2026
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Perth
Data last updated July 2026 · Verify anything important.