S
M
T
W
T
F
S
29
41°
30°
30
42°
30°
1
43°
34°
2
42°
38°
3
46°
38°
4
44°
35°
5
48°
31°
6
38°
30°
7
47°
38°
8
48°
40°
9
51°
40°
10
50°
34°
11
47°
37°
12
45°
35°
13
45°
34°
14
44°
35°
15
43°
35°
16
45°
34°
17
43°
31°
18
42°
34°
19
39°
34°
20
41°
37°
21
43°
36°
22
45°
34°
23
43°
32°
24
44°
35°
25
44°
37°
26
45°
34°
27
44°
31°
28
43°
35°
29
43°
36°
30
44°
35°
31
44°
36°
1
44°
36°
2
45°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mannheim
Mannheim's December 2026 forecast shows daily high temperatures ranging from 38° to 51°, with overnight lows between 30° and 40°. The average high for December is 44° with an average low of 35°. 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 Mannheim. See also: January | February | March.
