Western Australia climate guide

Temperature in Western Australia (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
31°C maximum daytime temperature in January in Western Australia (Perth)31
31°C maximum daytime temperature in February in Western Australia (Perth)31
29°C maximum daytime temperature in March in Western Australia (Perth)29
25°C maximum daytime temperature in April in Western Australia (Perth)25
21°C maximum daytime temperature in May in Western Australia (Perth)21
19°C maximum daytime temperature in June in Western Australia (Perth)19
18°C maximum daytime temperature in July in Western Australia (Perth)18
18°C maximum daytime temperature in August in Western Australia (Perth)18
20°C maximum daytime temperature in September in Western Australia (Perth)20
22°C maximum daytime temperature in October in Western Australia (Perth)22
25°C maximum daytime temperature in November in Western Australia (Perth)25
28°C maximum daytime temperature in December in Western Australia (Perth)28
Min temperature (night-time)
18°C minimum night-time temperature in January in Western Australia (Perth)18
18°C minimum night-time temperature in February in Western Australia (Perth)18
17°C minimum night-time temperature in March in Western Australia (Perth)17
14°C minimum night-time temperature in April in Western Australia (Perth)14
11°C minimum night-time temperature in May in Western Australia (Perth)11
10°C minimum night-time temperature in June in Western Australia (Perth)10
9°C minimum night-time temperature in July in Western Australia (Perth)9
9°C minimum night-time temperature in August in Western Australia (Perth)9
10°C minimum night-time temperature in September in Western Australia (Perth)10
11°C minimum night-time temperature in October in Western Australia (Perth)11
13°C minimum night-time temperature in November in Western Australia (Perth)13
16°C minimum night-time temperature in December in Western Australia (Perth)16
Sea temperature
22°C sea temperature in January in Western Australia (Perth)22
22°C sea temperature in February in Western Australia (Perth)22
22°C sea temperature in March in Western Australia (Perth)22
21°C sea temperature in April in Western Australia (Perth)21
21°C sea temperature in May in Western Australia (Perth)21
20°C sea temperature in June in Western Australia (Perth)20
19°C sea temperature in July in Western Australia (Perth)19
18°C sea temperature in August in Western Australia (Perth)18
18°C sea temperature in September in Western Australia (Perth)18
18°C sea temperature in October in Western Australia (Perth)18
19°C sea temperature in November in Western Australia (Perth)19
21°C sea temperature in December in Western Australia (Perth)21

Sunshine & Daylight in Western Australia

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
14 hours of daylight per day in January in Western Australia (Perth)14
13 hours of daylight per day in February in Western Australia (Perth)13
12 hours of daylight per day in March in Western Australia (Perth)12
11 hours of daylight per day in April in Western Australia (Perth)11
10 hours of daylight per day in May in Western Australia (Perth)10
10 hours of daylight per day in June in Western Australia (Perth)10
10 hours of daylight per day in July in Western Australia (Perth)10
11 hours of daylight per day in August in Western Australia (Perth)11
12 hours of daylight per day in September in Western Australia (Perth)12
13 hours of daylight per day in October in Western Australia (Perth)13
14 hours of daylight per day in November in Western Australia (Perth)14
14 hours of daylight per day in December in Western Australia (Perth)14

Rainfall in Western Australia

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
3 days with some rainfall in January in Western Australia (Perth)3
5 days with some rainfall in February in Western Australia (Perth)5
6 days with some rainfall in March in Western Australia (Perth)6
9 days with some rainfall in April in Western Australia (Perth)9
12 days with some rainfall in May in Western Australia (Perth)12
14 days with some rainfall in June in Western Australia (Perth)14
15 days with some rainfall in July in Western Australia (Perth)15
13 days with some rainfall in August in Western Australia (Perth)13
10 days with some rainfall in September in Western Australia (Perth)10
9 days with some rainfall in October in Western Australia (Perth)9
4 days with some rainfall in November in Western Australia (Perth)4
4 days with some rainfall in December in Western Australia (Perth)4
Average monthly rainfall (mm)
8 mm monthly rainfall in January in Western Australia (Perth)8
18 mm monthly rainfall in February in Western Australia (Perth)18
15 mm monthly rainfall in March in Western Australia (Perth)15
45 mm monthly rainfall in April in Western Australia (Perth)45
112 mm monthly rainfall in May in Western Australia (Perth)112
177 mm monthly rainfall in June in Western Australia (Perth)177
169 mm monthly rainfall in July in Western Australia (Perth)169
118 mm monthly rainfall in August in Western Australia (Perth)118
71 mm monthly rainfall in September in Western Australia (Perth)71
52 mm monthly rainfall in October in Western Australia (Perth)52
25 mm monthly rainfall in November in Western Australia (Perth)25
12 mm monthly rainfall in December in Western Australia (Perth)12

More climate for Western Australia

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in Western Australia (Perth)11
UV (maximum) index 11+ (Extreme) in February in Western Australia (Perth)11
UV (maximum) index 9 (Very High) in March in Western Australia (Perth)9
UV (maximum) index 6 (High) in April in Western Australia (Perth)6
UV (maximum) index 4 (Moderate) in May in Western Australia (Perth)4
UV (maximum) index 3 (Moderate) in June in Western Australia (Perth)3
UV (maximum) index 3 (Moderate) in July in Western Australia (Perth)3
UV (maximum) index 4 (Moderate) in August in Western Australia (Perth)4
UV (maximum) index 6 (High) in September in Western Australia (Perth)6
UV (maximum) index 8 (Very High) in October in Western Australia (Perth)8
UV (maximum) index 10 (Very High) in November in Western Australia (Perth)10
UV (maximum) index 11+ (Extreme) in December in Western Australia (Perth)11
Heat & Humidity
Moderate heat & humidity in January in Western Australia (Perth)M
Moderate heat & humidity in February in Western Australia (Perth)M
Moderate heat & humidity in March in Western Australia (Perth)M
No heat & humidity in April in Western Australia (Perth)0
No heat & humidity in May in Western Australia (Perth)0
No heat & humidity in June in Western Australia (Perth)0
No heat & humidity in July in Western Australia (Perth)0
No heat & humidity in August in Western Australia (Perth)0
No heat & humidity in September in Western Australia (Perth)0
No heat & humidity in October in Western Australia (Perth)0
No heat & humidity in November in Western Australia (Perth)0
Low heat & humidity in December in Western Australia (Perth)L

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

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The climate guide for Western Australia, represented by Perth, shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Western Australia climate overview

This immense state covers a third of the Australian continent and a diversity of different landscapes, where remote indigenous communities contrast with the cosmopolitan city of Perth with its impressive skyline and relaxed atmosphere.

A huge expanse of sandy plains and scrub dominate the interior of Western Australia, with the Great Sandy Desert to the north and the Great Victoria Desert to the south. Summer temperatures are hot, becoming extreme in the north where occasional summer rains temporarily fill shallow salt lakes. Daytime winter temperatures are comfortable but can become cold at night under clear skies.

Bordering the Great Sandy Desert to the north are the impressive Kimberly Ranges. This is home to the Wolf Creek meteorite crater and the Bungle Bungles, an ancient sandstone massif. Tropical summer downpours over the northern mountains feed seasonal raging rivers from December to March, which cut deep gorges through striking red plains leading down to a heavily indented coast. Summers are also prone to occasional cyclones along the whole Northwest coast. Winters are dry and temperatures remain warm or hot all year.

There are also low, undulating mountains bordering the desert in the west. Hot summer temperatures spark off occasional summer showers, which temporarily fill dried riverbeds and support some highland greenery. The mountains run down to a wide coastal plain, which is fertile enough in the south to support vast wheat-lands, vineyards and impressive eucalypt forests.

The long Indian Ocean coastline is also where most of the population lives, particularly in the south around state capital Perth, where there are stunning sandy beaches. Summers here are dry, hot, and sunny with a welcome sea breeze on most afternoons. Winters are cool and wet at times.

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