Washington climate guide

Temperature in Washington (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
5°C maximum daytime temperature in January in Washington5
7°C maximum daytime temperature in February in Washington7
13°C maximum daytime temperature in March in Washington13
19°C maximum daytime temperature in April in Washington19
24°C maximum daytime temperature in May in Washington24
29°C maximum daytime temperature in June in Washington29
31°C maximum daytime temperature in July in Washington31
30°C maximum daytime temperature in August in Washington30
26°C maximum daytime temperature in September in Washington26
20°C maximum daytime temperature in October in Washington20
14°C maximum daytime temperature in November in Washington14
8°C maximum daytime temperature in December in Washington8
Min temperature (night-time)
-4°C minimum night-time temperature in January in Washington-4
-3°C minimum night-time temperature in February in Washington-3
2°C minimum night-time temperature in March in Washington2
7°C minimum night-time temperature in April in Washington7
12°C minimum night-time temperature in May in Washington12
17°C minimum night-time temperature in June in Washington17
20°C minimum night-time temperature in July in Washington20
20°C minimum night-time temperature in August in Washington20
15°C minimum night-time temperature in September in Washington15
9°C minimum night-time temperature in October in Washington9
4°C minimum night-time temperature in November in Washington4
-1°C minimum night-time temperature in December in Washington-1

Sunshine & Daylight in Washington

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Washington10
11 hours of daylight per day in February in Washington11
12 hours of daylight per day in March in Washington12
13 hours of daylight per day in April in Washington13
14 hours of daylight per day in May in Washington14
15 hours of daylight per day in June in Washington15
15 hours of daylight per day in July in Washington15
14 hours of daylight per day in August in Washington14
12 hours of daylight per day in September in Washington12
11 hours of daylight per day in October in Washington11
10 hours of daylight per day in November in Washington10
9 hours of daylight per day in December in Washington9

Rainfall in Washington

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in Washington10
10 days with some rainfall in February in Washington10
10 days with some rainfall in March in Washington10
10 days with some rainfall in April in Washington10
11 days with some rainfall in May in Washington11
10 days with some rainfall in June in Washington10
10 days with some rainfall in July in Washington10
9 days with some rainfall in August in Washington9
7 days with some rainfall in September in Washington7
7 days with some rainfall in October in Washington7
9 days with some rainfall in November in Washington9
9 days with some rainfall in December in Washington9
Average monthly rainfall (mm)
71 mm monthly rainfall in January in Washington71
70 mm monthly rainfall in February in Washington70
85 mm monthly rainfall in March in Washington85
75 mm monthly rainfall in April in Washington75
96 mm monthly rainfall in May in Washington96
88 mm monthly rainfall in June in Washington88
99 mm monthly rainfall in July in Washington99
103 mm monthly rainfall in August in Washington103
87 mm monthly rainfall in September in Washington87
78 mm monthly rainfall in October in Washington78
83 mm monthly rainfall in November in Washington83
82 mm monthly rainfall in December in Washington82

More climate for Washington

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Washington2
UV (maximum) index 3 (Moderate) in February in Washington3
UV (maximum) index 5 (Moderate) in March in Washington5
UV (maximum) index 7 (High) in April in Washington7
UV (maximum) index 8 (Very High) in May in Washington8
UV (maximum) index 9 (Very High) in June in Washington9
UV (maximum) index 9 (Very High) in July in Washington9
UV (maximum) index 8 (Very High) in August in Washington8
UV (maximum) index 7 (High) in September in Washington7
UV (maximum) index 4 (Moderate) in October in Washington4
UV (maximum) index 3 (Moderate) in November in Washington3
UV (maximum) index 2 (Low) in December in Washington2
Heat & Humidity
No heat & humidity in January in Washington0
No heat & humidity in February in Washington0
No heat & humidity in March in Washington0
No heat & humidity in April in Washington0
No heat & humidity in May in Washington0
Moderate heat & humidity in June in WashingtonM
High heat & humidity in July in WashingtonH
High heat & humidity in August in WashingtonH
Low heat & humidity in September in WashingtonL
No heat & humidity in October in Washington0
No heat & humidity in November in Washington0
No heat & humidity in December in Washington0

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

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The climate guide for Washington, D.C. 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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