Annual mean 17°C · wettest around December · prevailing wind W
Warmest
31.0 °C
Coldest
9.5 °C
Wettest
92%
Windiest
4.6 m/s
Prevailing
W
3.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Washington over the whole year is 17°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 3°C. Washington has no sharply defined rainy season: the chance of rain on a given day runs from 78% in October, the driest month, to 86% in December, the wettest. Winds in Washington are highest in April, averaging 3.0 m/s (11 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the W. The clearest skies in Washington come in July, when the sky is typically 31% covered; September is the cloudiest month, at 42%.
Month by month Washington climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
10°C
3°C
6°C
81%
37%
2.3 m/s
12
0
38
February
13°C
6°C
10°C
82%
42%
2.6 m/s
26
2
50
March
16°C
8°C
13°C
82%
37%
2.9 m/s
38
4
59
April
21°C
12°C
18°C
83%
32%
3.0 m/s
60
19
56
May
25°C
17°C
24°C
81%
40%
2.6 m/s
54
42
33
June
29°C
21°C
30°C
83%
34%
2.3 m/s
27
57
8
July
31°C
24°C
33°C
81%
31%
2.3 m/s
6
38
1
August
30°C
23°C
32°C
82%
38%
1.9 m/s
12
45
3
September
27°C
20°C
28°C
86%
42%
2.1 m/s
36
53
15
October
23°C
14°C
22°C
78%
38%
1.9 m/s
65
29
50
November
17°C
8°C
14°C
84%
33%
2.0 m/s
40
6
63
December
12°C
5°C
9°C
86%
37%
2.1 m/s
21
0
51
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Washington weather by season
Year round, Washington has days of about 10°C at their warmest in January, its coolest month, and 31°C in July, its warmest; the coolest hours of the day run from 3°C to 24°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around December and least likely around October. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Washington weather in winterDecember to February
High 12°CLow 5°CRain 83%
Winter in Washington has typical daily highs of about 12°C and lows of about 5°C, with a 83% chance of rain on a given day.
Washington weather in springMarch to May
High 21°CLow 12°CRain 82%
Spring in Washington has typical daily highs of about 21°C and lows of about 12°C, with a 82% chance of rain on a given day.
Washington weather in summerJune to August
High 30°CLow 22°CRain 82%
Summer in Washington has typical daily highs of about 30°C and lows of about 22°C, with a 82% chance of rain on a given day.
Washington weather in autumnSeptember to November
High 22°CLow 14°CRain 83%
Autumn in Washington has typical daily highs of about 22°C and lows of about 14°C, with a 83% chance of rain on a given day.
When is the rainy season in Washington?
Washington has no sharply defined rainy season: the chance of rain on a given day runs from 78% in October, the driest month, to 86% in December, the wettest.
What time of year is Washington windiest?
Winds in Washington are highest in April, averaging 3.0 m/s (11 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the W.
What is the average temperature in Washington year round?
The average temperature in Washington over the whole year is 17°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 3°C.