S
M
T
W
T
F
S
30
45°
31°
1
40°
36°
2
44°
32°
3
36°
32°
4
41°
34°
5
42°
30°
6
46°
28°
7
47°
41°
8
54°
38°
9
50°
35°
10
50°
35°
11
47°
38°
12
44°
38°
13
39°
35°
14
35°
32°
15
34°
31°
16
36°
30°
17
45°
31°
18
38°
28°
19
42°
31°
20
46°
33°
21
37°
30°
22
36°
33°
23
33°
32°
24
35°
31°
25
33°
32°
26
32°
30°
27
31°
29°
28
32°
29°
29
31°
27°
30
34°
26°
31
33°
18°
1
35°
17°
2
40°
28°
3
33°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Bern
Bern's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Bern. See also: January | February | March.
