Western Australia weather by month

Check out Western Australia weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
31°C maximum daytime temperature in January in Perth31
31°C maximum daytime temperature in February in Perth31
29°C maximum daytime temperature in March in Perth29
25°C maximum daytime temperature in April in Perth25
21°C maximum daytime temperature in May in Perth21
19°C maximum daytime temperature in June in Perth19
18°C maximum daytime temperature in July in Perth18
18°C maximum daytime temperature in August in Perth18
20°C maximum daytime temperature in September in Perth20
22°C maximum daytime temperature in October in Perth22
25°C maximum daytime temperature in November in Perth25
28°C maximum daytime temperature in December in Perth28
Hours of sunshine (daily)
Days with some rainfall
3 days with some rainfall in January in Perth3
5 days with some rainfall in February in Perth5
6 days with some rainfall in March in Perth6
9 days with some rainfall in April in Perth9
12 days with some rainfall in May in Perth12
14 days with some rainfall in June in Perth14
15 days with some rainfall in July in Perth15
13 days with some rainfall in August in Perth13
10 days with some rainfall in September in Perth10
9 days with some rainfall in October in Perth9
4 days with some rainfall in November in Perth4
4 days with some rainfall in December in Perth4
Sea temperature °C
22°C sea temperature in January in Perth22
22°C sea temperature in February in Perth22
22°C sea temperature in March in Perth22
21°C sea temperature in April in Perth21
21°C sea temperature in May in Perth21
20°C sea temperature in June in Perth20
19°C sea temperature in July in Perth19
18°C sea temperature in August in Perth18
18°C sea temperature in September in Perth18
18°C sea temperature in October in Perth18
19°C sea temperature in November in Perth19
21°C sea temperature in December in Perth21

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Western Australia by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Western Australia (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.

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.

Western Australia temperature by month

Compare the average temperature by month for popular destinations in Western Australia. Select a place from below to see more long term weather averages by month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Broome
33°C maximum daytime temperature in January in Broome33
33°C maximum daytime temperature in February in Broome33
34°C maximum daytime temperature in March in Broome34
34°C maximum daytime temperature in April in Broome34
32°C maximum daytime temperature in May in Broome32
29°C maximum daytime temperature in June in Broome29
29°C maximum daytime temperature in July in Broome29
30°C maximum daytime temperature in August in Broome30
32°C maximum daytime temperature in September in Broome32
33°C maximum daytime temperature in October in Broome33
34°C maximum daytime temperature in November in Broome34
34°C maximum daytime temperature in December in Broome34
Kalgoorlie
33°C maximum daytime temperature in January in Kalgoorlie33
32°C maximum daytime temperature in February in Kalgoorlie32
29°C maximum daytime temperature in March in Kalgoorlie29
25°C maximum daytime temperature in April in Kalgoorlie25
20°C maximum daytime temperature in May in Kalgoorlie20
17°C maximum daytime temperature in June in Kalgoorlie17
16°C maximum daytime temperature in July in Kalgoorlie16
18°C maximum daytime temperature in August in Kalgoorlie18
22°C maximum daytime temperature in September in Kalgoorlie22
25°C maximum daytime temperature in October in Kalgoorlie25
29°C maximum daytime temperature in November in Kalgoorlie29
32°C maximum daytime temperature in December in Kalgoorlie32
Margaret River
26°C maximum daytime temperature in January in Margaret River26
27°C maximum daytime temperature in February in Margaret River27
25°C maximum daytime temperature in March in Margaret River25
22°C maximum daytime temperature in April in Margaret River22
19°C maximum daytime temperature in May in Margaret River19
17°C maximum daytime temperature in June in Margaret River17
16°C maximum daytime temperature in July in Margaret River16
17°C maximum daytime temperature in August in Margaret River17
18°C maximum daytime temperature in September in Margaret River18
19°C maximum daytime temperature in October in Margaret River19
22°C maximum daytime temperature in November in Margaret River22
24°C maximum daytime temperature in December in Margaret River24
Monkey Mia
34°C maximum daytime temperature in January in Monkey Mia34
35°C maximum daytime temperature in February in Monkey Mia35
33°C maximum daytime temperature in March in Monkey Mia33
29°C maximum daytime temperature in April in Monkey Mia29
26°C maximum daytime temperature in May in Monkey Mia26
23°C maximum daytime temperature in June in Monkey Mia23
22°C maximum daytime temperature in July in Monkey Mia22
22°C maximum daytime temperature in August in Monkey Mia22
25°C maximum daytime temperature in September in Monkey Mia25
27°C maximum daytime temperature in October in Monkey Mia27
29°C maximum daytime temperature in November in Monkey Mia29
32°C maximum daytime temperature in December in Monkey Mia32
Perth
31°C maximum daytime temperature in January in Perth31
31°C maximum daytime temperature in February in Perth31
29°C maximum daytime temperature in March in Perth29
25°C maximum daytime temperature in April in Perth25
21°C maximum daytime temperature in May in Perth21
19°C maximum daytime temperature in June in Perth19
18°C maximum daytime temperature in July in Perth18
18°C maximum daytime temperature in August in Perth18
20°C maximum daytime temperature in September in Perth20
22°C maximum daytime temperature in October in Perth22
25°C maximum daytime temperature in November in Perth25
28°C maximum daytime temperature in December in Perth28
The Kimberley
37°C maximum daytime temperature in January in The Kimberley37
36°C maximum daytime temperature in February in The Kimberley36
35°C maximum daytime temperature in March in The Kimberley35
33°C maximum daytime temperature in April in The Kimberley33
30°C maximum daytime temperature in May in The Kimberley30
27°C maximum daytime temperature in June in The Kimberley27
27°C maximum daytime temperature in July in The Kimberley27
30°C maximum daytime temperature in August in The Kimberley30
34°C maximum daytime temperature in September in The Kimberley34
37°C maximum daytime temperature in October in The Kimberley37
38°C maximum daytime temperature in November in The Kimberley38
38°C maximum daytime temperature in December in The Kimberley38

All Western Australia destinations

Western Australia weather averages by month

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
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
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

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

Sunshine & UV index 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
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

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

Tropical storm risk: Western Australia cyclone season

% of month affected by tropical storms
0
0
<1%
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Western Australia weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Western Australia, Australia (Perth) and the UK (London).

Maximum daytime temperature (°C)

Western Australia, Australia (Perth)
UK (London)
31
7
31
7
29
10
25
13
21
17
19
20
18
22
18
22
20
19
22
15
25
10
28
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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