S
M
T
W
T
F
S
29
49°
33°
30
49°
31°
1
48°
37°
2
48°
36°
3
58°
35°
4
54°
36°
5
48°
30°
6
47°
29°
7
44°
27°
8
41°
28°
9
42°
28°
10
44°
31°
11
44°
33°
12
56°
29°
13
Hist. Avg.
49°
35°
14
Hist. Avg.
49°
35°
15
Hist. Avg.
49°
35°
16
Hist. Avg.
49°
34°
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 58°, with overnight lows between 27° and 37°. The average high for December is 48° with an average low of 32°. 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.
