S
M
T
W
T
F
S
29
54°
34°
30
55°
32°
1
49°
31°
2
44°
30°
3
46°
31°
4
50°
33°
5
53°
40°
6
57°
45°
7
59°
44°
8
61°
39°
9
61°
37°
10
47°
39°
11
49°
31°
12
47°
29°
13
43°
30°
14
46°
29°
15
44°
30°
16
44°
28°
17
43°
27°
18
42°
29°
19
42°
27°
20
43°
29°
21
43°
39°
22
49°
41°
23
57°
35°
24
50°
32°
25
46°
27°
26
43°
24°
27
41°
30°
28
42°
29°
29
49°
25°
30
40°
23°
31
37°
24°
1
36°
27°
2
41°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in National Mall
National Mall's December 2026 forecast shows daily high temperatures ranging from 36° to 61°, with overnight lows between 23° and 45°. The average high for December is 47° 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 National Mall. See also: January | February | March.
