S
M
T
W
T
F
S
29
40°
25°
30
40°
25°
1
41°
27°
2
40°
33°
3
52°
26°
4
54°
21°
5
38°
27°
6
38°
27°
7
43°
28°
8
49°
30°
9
38°
21°
10
46°
36°
11
50°
37°
12
Hist. Avg.
42°
27°
13
Hist. Avg.
42°
27°
14
Hist. Avg.
42°
26°
15
Hist. Avg.
41°
26°
16
Hist. Avg.
41°
26°
17
Hist. Avg.
41°
26°
18
Hist. Avg.
41°
26°
19
Hist. Avg.
40°
25°
20
Hist. Avg.
40°
25°
21
Hist. Avg.
40°
25°
22
Hist. Avg.
40°
25°
23
Hist. Avg.
40°
24°
24
Hist. Avg.
39°
24°
25
Hist. Avg.
39°
24°
26
Hist. Avg.
39°
24°
27
Hist. Avg.
39°
23°
28
Hist. Avg.
39°
23°
29
Hist. Avg.
38°
23°
30
Hist. Avg.
38°
23°
31
Hist. Avg.
38°
22°
1
Hist. Avg.
38°
22°
2
Hist. Avg.
38°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Washington
Washington's December 2026 forecast shows daily high temperatures ranging from 38° to 54°, with overnight lows between 21° and 37°. The average high for December is 44° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Washington. See also: January | February | March.
