S
M
T
W
T
F
S
29
41°
23°
30
29°
21°
1
26°
20°
2
38°
24°
3
40°
23°
4
38°
23°
5
34°
22°
6
31°
19°
7
22°
19°
8
37°
22°
9
38°
22°
10
38°
21°
11
37°
21°
12
36°
20°
13
36°
22°
14
30°
17°
15
32°
19°
16
32°
13°
17
31°
11°
18
25°
1°
19
24°
-1°
20
17°
15°
21
30°
17°
22
31°
14°
23
29°
12°
24
25°
13°
25
30°
15°
26
29°
14°
27
31°
5°
28
27°
0°
29
18°
0°
30
15°
-2°
31
13°
-2°
1
14°
10°
2
16°
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 13° to 41°, with overnight lows between -2° and 24°. The average high for December is 29° with an average low of 14°. 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.
