Washington State weather by month

Check out Washington State 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
7°C maximum daytime temperature in January in Seattle7
10°C maximum daytime temperature in February in Seattle10
12°C maximum daytime temperature in March in Seattle12
14°C maximum daytime temperature in April in Seattle14
18°C maximum daytime temperature in May in Seattle18
21°C maximum daytime temperature in June in Seattle21
24°C maximum daytime temperature in July in Seattle24
24°C maximum daytime temperature in August in Seattle24
21°C maximum daytime temperature in September in Seattle21
16°C maximum daytime temperature in October in Seattle16
11°C maximum daytime temperature in November in Seattle11
8°C maximum daytime temperature in December in Seattle8
Hours of sunshine (daily)
Days with some rainfall
18 days with some rainfall in January in Seattle18
15 days with some rainfall in February in Seattle15
16 days with some rainfall in March in Seattle16
13 days with some rainfall in April in Seattle13
11 days with some rainfall in May in Seattle11
9 days with some rainfall in June in Seattle9
5 days with some rainfall in July in Seattle5
6 days with some rainfall in August in Seattle6
9 days with some rainfall in September in Seattle9
12 days with some rainfall in October in Seattle12
17 days with some rainfall in November in Seattle17
18 days with some rainfall in December in Seattle18

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Washington State by month

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

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The climate guide for Washington State (Seattle) 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.

Top Washington State destinations

Below are average maximum temperatures at popular countries, regions and places in Washington State for next month - February. Select a destination to see the climate guide for all months of the year.

All Washington State destinations

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

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Washington State weather averages

Temperature in Washington State (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Washington State (Seattle)7
10°C maximum daytime temperature in February in Washington State (Seattle)10
12°C maximum daytime temperature in March in Washington State (Seattle)12
14°C maximum daytime temperature in April in Washington State (Seattle)14
18°C maximum daytime temperature in May in Washington State (Seattle)18
21°C maximum daytime temperature in June in Washington State (Seattle)21
24°C maximum daytime temperature in July in Washington State (Seattle)24
24°C maximum daytime temperature in August in Washington State (Seattle)24
21°C maximum daytime temperature in September in Washington State (Seattle)21
16°C maximum daytime temperature in October in Washington State (Seattle)16
11°C maximum daytime temperature in November in Washington State (Seattle)11
8°C maximum daytime temperature in December in Washington State (Seattle)8
Min temperature (night-time)
2°C minimum night-time temperature in January in Washington State (Seattle)2
3°C minimum night-time temperature in February in Washington State (Seattle)3
3°C minimum night-time temperature in March in Washington State (Seattle)3
5°C minimum night-time temperature in April in Washington State (Seattle)5
8°C minimum night-time temperature in May in Washington State (Seattle)8
11°C minimum night-time temperature in June in Washington State (Seattle)11
13°C minimum night-time temperature in July in Washington State (Seattle)13
13°C minimum night-time temperature in August in Washington State (Seattle)13
11°C minimum night-time temperature in September in Washington State (Seattle)11
8°C minimum night-time temperature in October in Washington State (Seattle)8
4°C minimum night-time temperature in November in Washington State (Seattle)4
2°C minimum night-time temperature in December in Washington State (Seattle)2
Heat & Humidity
No heat & humidity in January in Washington State (Seattle)0
No heat & humidity in February in Washington State (Seattle)0
No heat & humidity in March in Washington State (Seattle)0
No heat & humidity in April in Washington State (Seattle)0
No heat & humidity in May in Washington State (Seattle)0
No heat & humidity in June in Washington State (Seattle)0
No heat & humidity in July in Washington State (Seattle)0
No heat & humidity in August in Washington State (Seattle)0
No heat & humidity in September in Washington State (Seattle)0
No heat & humidity in October in Washington State (Seattle)0
No heat & humidity in November in Washington State (Seattle)0
No heat & humidity in December in Washington State (Seattle)0

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

Sunshine & UV index in Washington State

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Washington State (Seattle)9
10 hours of daylight per day in February in Washington State (Seattle)10
12 hours of daylight per day in March in Washington State (Seattle)12
14 hours of daylight per day in April in Washington State (Seattle)14
15 hours of daylight per day in May in Washington State (Seattle)15
16 hours of daylight per day in June in Washington State (Seattle)16
16 hours of daylight per day in July in Washington State (Seattle)16
14 hours of daylight per day in August in Washington State (Seattle)14
13 hours of daylight per day in September in Washington State (Seattle)13
11 hours of daylight per day in October in Washington State (Seattle)11
9 hours of daylight per day in November in Washington State (Seattle)9
8 hours of daylight per day in December in Washington State (Seattle)8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Washington State (Seattle)1
UV (maximum) index 2 (Low) in February in Washington State (Seattle)2
UV (maximum) index 3 (Moderate) in March in Washington State (Seattle)3
UV (maximum) index 5 (Moderate) in April in Washington State (Seattle)5
UV (maximum) index 6 (High) in May in Washington State (Seattle)6
UV (maximum) index 7 (High) in June in Washington State (Seattle)7
UV (maximum) index 7 (High) in July in Washington State (Seattle)7
UV (maximum) index 6 (High) in August in Washington State (Seattle)6
UV (maximum) index 5 (Moderate) in September in Washington State (Seattle)5
UV (maximum) index 3 (Moderate) in October in Washington State (Seattle)3
UV (maximum) index 1 (Low) in November in Washington State (Seattle)1
UV (maximum) index 1 (Low) in December in Washington State (Seattle)1

Rainfall in Washington State

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
18 days with some rainfall in January in Washington State (Seattle)18
15 days with some rainfall in February in Washington State (Seattle)15
16 days with some rainfall in March in Washington State (Seattle)16
13 days with some rainfall in April in Washington State (Seattle)13
11 days with some rainfall in May in Washington State (Seattle)11
9 days with some rainfall in June in Washington State (Seattle)9
5 days with some rainfall in July in Washington State (Seattle)5
6 days with some rainfall in August in Washington State (Seattle)6
9 days with some rainfall in September in Washington State (Seattle)9
12 days with some rainfall in October in Washington State (Seattle)12
17 days with some rainfall in November in Washington State (Seattle)17
18 days with some rainfall in December in Washington State (Seattle)18
Average monthly rainfall (mm)
149 mm monthly rainfall in January in Washington State (Seattle)149
105 mm monthly rainfall in February in Washington State (Seattle)105
95 mm monthly rainfall in March in Washington State (Seattle)95
66 mm monthly rainfall in April in Washington State (Seattle)66
46 mm monthly rainfall in May in Washington State (Seattle)46
41 mm monthly rainfall in June in Washington State (Seattle)41
20 mm monthly rainfall in July in Washington State (Seattle)20
31 mm monthly rainfall in August in Washington State (Seattle)31
49 mm monthly rainfall in September in Washington State (Seattle)49
87 mm monthly rainfall in October in Washington State (Seattle)87
149 mm monthly rainfall in November in Washington State (Seattle)149
151 mm monthly rainfall in December in Washington State (Seattle)151

Compare Washington State weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Washington, USA (Seattle) and the UK (London).

Maximum daytime temperature (°C)

Washington, USA (Seattle)
UK (London)
7
7
10
7
12
10
14
13
18
17
21
20
24
22
24
22
21
19
16
15
11
10
8
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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