Washington climate guide

Temperature in Washington (°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 (Seattle)7
10°C maximum daytime temperature in February in Washington (Seattle)10
12°C maximum daytime temperature in March in Washington (Seattle)12
14°C maximum daytime temperature in April in Washington (Seattle)14
18°C maximum daytime temperature in May in Washington (Seattle)18
21°C maximum daytime temperature in June in Washington (Seattle)21
24°C maximum daytime temperature in July in Washington (Seattle)24
24°C maximum daytime temperature in August in Washington (Seattle)24
21°C maximum daytime temperature in September in Washington (Seattle)21
16°C maximum daytime temperature in October in Washington (Seattle)16
11°C maximum daytime temperature in November in Washington (Seattle)11
8°C maximum daytime temperature in December in Washington (Seattle)8
Min temperature (night-time)
2°C minimum night-time temperature in January in Washington (Seattle)2
3°C minimum night-time temperature in February in Washington (Seattle)3
3°C minimum night-time temperature in March in Washington (Seattle)3
5°C minimum night-time temperature in April in Washington (Seattle)5
8°C minimum night-time temperature in May in Washington (Seattle)8
11°C minimum night-time temperature in June in Washington (Seattle)11
13°C minimum night-time temperature in July in Washington (Seattle)13
13°C minimum night-time temperature in August in Washington (Seattle)13
11°C minimum night-time temperature in September in Washington (Seattle)11
8°C minimum night-time temperature in October in Washington (Seattle)8
4°C minimum night-time temperature in November in Washington (Seattle)4
2°C minimum night-time temperature in December in Washington (Seattle)2

Sunshine & Daylight in Washington

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
2 hours of sunshine per day (25% of daylight hours) in January in Washington2
4 hours of sunshine per day (36% of daylight hours) in February in Washington4
5 hours of sunshine per day (44% of daylight hours) in March in Washington5
7 hours of sunshine per day (48% of daylight hours) in April in Washington7
8 hours of sunshine per day (52% of daylight hours) in May in Washington8
9 hours of sunshine per day (55% of daylight hours) in June in Washington9
10 hours of sunshine per day (64% of daylight hours) in July in Washington10
9 hours of sunshine per day (63% of daylight hours) in August in Washington9
7 hours of sunshine per day (57% of daylight hours) in September in Washington7
5 hours of sunshine per day (42% of daylight hours) in October in Washington5
2 hours of sunshine per day (26% of daylight hours) in November in Washington2
2 hours of sunshine per day (21% of daylight hours) in December in Washington2
Daily hours of daylight
9 hours of daylight per day in January in Washington (Seattle)9
10 hours of daylight per day in February in Washington (Seattle)10
12 hours of daylight per day in March in Washington (Seattle)12
14 hours of daylight per day in April in Washington (Seattle)14
15 hours of daylight per day in May in Washington (Seattle)15
16 hours of daylight per day in June in Washington (Seattle)16
16 hours of daylight per day in July in Washington (Seattle)16
14 hours of daylight per day in August in Washington (Seattle)14
13 hours of daylight per day in September in Washington (Seattle)13
11 hours of daylight per day in October in Washington (Seattle)11
9 hours of daylight per day in November in Washington (Seattle)9
8 hours of daylight per day in December in Washington (Seattle)8

Rainfall in Washington

  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 (Seattle)18
15 days with some rainfall in February in Washington (Seattle)15
16 days with some rainfall in March in Washington (Seattle)16
13 days with some rainfall in April in Washington (Seattle)13
11 days with some rainfall in May in Washington (Seattle)11
9 days with some rainfall in June in Washington (Seattle)9
5 days with some rainfall in July in Washington (Seattle)5
6 days with some rainfall in August in Washington (Seattle)6
9 days with some rainfall in September in Washington (Seattle)9
12 days with some rainfall in October in Washington (Seattle)12
17 days with some rainfall in November in Washington (Seattle)17
18 days with some rainfall in December in Washington (Seattle)18
Average monthly rainfall (mm)
149 mm monthly rainfall in January in Washington (Seattle)149
105 mm monthly rainfall in February in Washington (Seattle)105
95 mm monthly rainfall in March in Washington (Seattle)95
66 mm monthly rainfall in April in Washington (Seattle)66
46 mm monthly rainfall in May in Washington (Seattle)46
41 mm monthly rainfall in June in Washington (Seattle)41
20 mm monthly rainfall in July in Washington (Seattle)20
31 mm monthly rainfall in August in Washington (Seattle)31
49 mm monthly rainfall in September in Washington (Seattle)49
87 mm monthly rainfall in October in Washington (Seattle)87
149 mm monthly rainfall in November in Washington (Seattle)149
151 mm monthly rainfall in December in Washington (Seattle)151

More climate for Washington

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Washington (Seattle)1
UV (maximum) index 2 (Low) in February in Washington (Seattle)2
UV (maximum) index 3 (Moderate) in March in Washington (Seattle)3
UV (maximum) index 5 (Moderate) in April in Washington (Seattle)5
UV (maximum) index 6 (High) in May in Washington (Seattle)6
UV (maximum) index 7 (High) in June in Washington (Seattle)7
UV (maximum) index 7 (High) in July in Washington (Seattle)7
UV (maximum) index 6 (High) in August in Washington (Seattle)6
UV (maximum) index 5 (Moderate) in September in Washington (Seattle)5
UV (maximum) index 3 (Moderate) in October in Washington (Seattle)3
UV (maximum) index 1 (Low) in November in Washington (Seattle)1
UV (maximum) index 1 (Low) in December in Washington (Seattle)1
Heat & Humidity
No heat & humidity in January in Washington (Seattle)0
No heat & humidity in February in Washington (Seattle)0
No heat & humidity in March in Washington (Seattle)0
No heat & humidity in April in Washington (Seattle)0
No heat & humidity in May in Washington (Seattle)0
No heat & humidity in June in Washington (Seattle)0
No heat & humidity in July in Washington (Seattle)0
No heat & humidity in August in Washington (Seattle)0
No heat & humidity in September in Washington (Seattle)0
No heat & humidity in October in Washington (Seattle)0
No heat & humidity in November in Washington (Seattle)0
No heat & humidity in December in Washington (Seattle)0

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

Going to Washington? Find the best month to visit Washington based on the weather.

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

Check climate guides for Washington showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for Seattle.

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More about Washington

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

The climate guide for Washington, represented by 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.

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

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