S
M
T
W
T
F
S
29
56°
38°
30
55°
38°
1
54°
30°
2
41°
27°
3
44°
30°
4
52°
33°
5
51°
35°
6
40°
26°
7
39°
22°
8
37°
21°
9
38°
24°
10
41°
28°
11
45°
27°
12
48°
28°
13
45°
27°
14
40°
23°
15
41°
25°
16
40°
29°
17
41°
26°
18
40°
20°
19
38°
19°
20
37°
17°
21
34°
20°
22
36°
26°
23
42°
24°
24
38°
23°
25
36°
17°
26
37°
18°
27
37°
18°
28
36°
19°
29
35°
22°
30
36°
20°
31
36°
17°
1
37°
13°
2
34°
14°
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 34° to 56°, with overnight lows between 13° and 38°. The average high for December is 41° 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.
