S
M
T
W
T
F
S
29
61°
36°
30
60°
28°
1
58°
28°
2
44°
29°
3
44°
29°
4
45°
39°
5
51°
38°
6
57°
30°
7
47°
30°
8
45°
38°
9
50°
33°
10
52°
29°
11
45°
28°
12
43°
27°
13
47°
26°
14
42°
25°
15
41°
25°
16
41°
29°
17
Hist. Avg.
48°
34°
18
Hist. Avg.
48°
34°
19
Hist. Avg.
48°
34°
20
Hist. Avg.
48°
34°
21
Hist. Avg.
47°
34°
22
Hist. Avg.
47°
33°
23
Hist. Avg.
47°
33°
24
Hist. Avg.
47°
33°
25
Hist. Avg.
47°
33°
26
Hist. Avg.
46°
33°
27
Hist. Avg.
46°
32°
28
Hist. Avg.
46°
32°
29
Hist. Avg.
46°
32°
30
Hist. Avg.
46°
32°
31
Hist. Avg.
46°
32°
1
Hist. Avg.
46°
32°
2
Hist. Avg.
45°
31°
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 41° to 61°, with overnight lows between 25° and 39°. The average high for December is 49° with an average low of 30°. 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.
