S
M
T
W
T
F
S
29
35°
31°
30
35°
35°
1
39°
33°
2
43°
28°
3
41°
27°
4
36°
27°
5
38°
24°
6
34°
24°
7
34°
26°
8
35°
30°
9
37°
23°
10
37°
21°
11
33°
20°
12
35°
22°
13
36°
23°
14
35°
23°
15
35°
24°
16
36°
22°
17
35°
23°
18
34°
24°
19
35°
23°
20
34°
21°
21
34°
21°
22
35°
22°
23
34°
23°
24
35°
24°
25
32°
22°
26
33°
19°
27
33°
21°
28
32°
20°
29
32°
22°
30
31°
31°
31
Hist. Avg.
36°
27°
1
Hist. Avg.
36°
28°
2
Hist. Avg.
36°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Altdorf
Altdorf's December 2026 forecast shows daily high temperatures ranging from 31° to 43°, with overnight lows between 19° and 35°. The average high for December is 35° 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 Altdorf. See also: January | February | March.
