Weather in Perth

Swan River, Perth, WA. © Tourism Western Australia

Weather in Perth

Western Australia has a number of climate zones due to its enormous size. The southwest has mild, wet winters and hot, dry summers. Perth has more sunny days annually than any other Australian capital city. Rainfall is highest between May and September. February is usually the hottest month of the year, with temperatures averaging 31°C. A sea breeze called ‘The Fremantle Doctor’ provides some relief from the heat. Winters are relatively cool and wet with daytime temperatures ranging from 18-21°C. Here you will find some information on temperature, rainfall and seasonal activities to help you plan your holiday in Perth.

Perth has a Mediterranean-style climate, which means that for most of the year, the weather is warm and sunny. Perth has more sunny days per year than any other Australian capital city. Even during the short mild winter the sun is often shining. These long summers mean many Perth activities revolve around the outdoors. Almost any time of year is great for sight-seeing, outdoor activities or lazing on Perth’s clean sandy beaches.

The weather is warm to hot over the summer months (December – February) in Perth. The hottest months are usually January and February. The weather is fine and dry, and rain at this time of year is unusual. Perth also enjoys a refreshing afternoon sea breeze known as the Fremantle Doctor which brings welcome relief on hot days. Average summer temperatures range from 27°C -30°C during the day to 15°C minimum at night. Kings Park, Perth’s inner city park is the perfect place to spend a sunny afternoon in Perth.

Autumn (March – May) in Perth is like an extension of summer, with similar temperatures and warm sunny days and cooler nights. Although the weather is still mostly fine, there may be an occasional shower or humidity. The annual Sculpture by the Sea free arts festival is held at Cottesloe Beach in March. It’s a lovely time of year to take a cruise down the river to Fremantle; visit the vineyards of the Swan Valley; or head to Rottnest Island.

The mild Perth winter (June – August) is the rainy season, with cool sunny days. There are occasional storms, characterised by downpours of rain and thunderstorms. Daily temperatures in winter range from 18-21°C to a minimum of 12°C at night. Even if it is raining there are plenty of indoor activities to enjoy. Northbridge is Perth’s cultural centre where you can spend the days at the Western Australian Museum, Art Gallery of Western Australia and the Perth Institute of Contemporary Art. The Fremantle Prison, Fremantle Museum and Maritime Museum are also great places to visit in winter.

In spring (September – November) days are warm and sunny, especially from October and November with daily temperatures of around 20 – 25°C. There is little rainfall at this time of year and Western Australia comes alive with colourful wildflowers. Follow the Wilderness and Wildflowers Trail in the Botanic Gardens or one of the many trails throughout the region.


Climate Chart

Temperature

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

Mean maximum temperature (°C)

31.7 

 31.9

 29.7

 25.5

21.8 

18.9 

17.9 

 18.5

20.1 

22.6 

25.8 

28.9 

24.4 

Mean minimum temperature (°C)

 17

17.5 

15.9 

 12.9

 10.4

 9

 8

8.8 

10.2 

12.7 

14.9 

 12.1

Source: Bureau of Meteorology, 2013

Precipitation Chart

Rainfall

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

Mean rainfall (mm)

 9.7

14.4 

15.7 

41.4 

99.3 

162 

 157.3

 117.3

72.2 

 44.3

26.9 

11.4 

 773

Decile 5 (median) rainfall (mm)

2.3 

5.4 

34.3 

88.6 

158.2 

 154.6

119.2 

 66.8

38.4 

22.2 

 8.2

 777.6

Mean number of days of rain ≥ 1 (mm)

1.4 

1.5 

2.2 

5.4 

 9.9

14.2 

14.9 

13 

10.2 

6.7 

 4.4

2.3 

86.1 

Source: Bureau of Meteorology, 2013

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