S
M
T
W
T
F
S
29
49°
37°
30
52°
37°
1
50°
34°
2
46°
33°
3
43°
32°
4
48°
34°
5
49°
34°
6
42°
31°
7
37°
26°
8
35°
22°
9
34°
24°
10
40°
28°
11
41°
32°
12
43°
29°
13
42°
29°
14
35°
23°
15
38°
25°
16
39°
30°
17
41°
28°
18
38°
23°
19
37°
19°
20
32°
17°
21
31°
17°
22
30°
23°
23
37°
26°
24
35°
25°
25
35°
15°
26
34°
12°
27
30°
12°
28
29°
13°
29
29°
17°
30
30°
22°
31
30°
15°
1
34°
10°
2
29°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Bismarck
Bismarck's December 2026 forecast shows daily high temperatures ranging from 29° to 52°, with overnight lows between 9° and 37°. The average high for December is 38° with an average low of 24°. 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 Bismarck. See also: January | February | March.
