S
M
T
W
T
F
S
29
70°
49°
30
70°
43°
1
63°
35°
2
54°
34°
3
56°
36°
4
60°
46°
5
62°
40°
6
55°
35°
7
55°
36°
8
53°
33°
9
52°
32°
10
53°
32°
11
57°
35°
12
58°
39°
13
62°
43°
14
57°
35°
15
54°
34°
16
53°
38°
17
57°
34°
18
53°
30°
19
52°
29°
20
52°
31°
21
54°
33°
22
58°
31°
23
54°
30°
24
51°
30°
25
53°
31°
26
52°
31°
27
55°
33°
28
56°
31°
29
53°
30°
30
51°
31°
31
53°
29°
1
51°
29°
2
53°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Heidenheimer
Heidenheimer's December 2026 forecast shows daily high temperatures ranging from 51° to 70°, with overnight lows between 29° and 49°. The average high for December is 56° with an average low of 34°. 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 Heidenheimer. See also: January | February | March.
