S
M
T
W
T
F
S
29
46°
32°
30
44°
28°
1
35°
31°
2
38°
30°
3
39°
33°
4
39°
27°
5
43°
26°
6
39°
23°
7
34°
22°
8
33°
21°
9
34°
20°
10
33°
21°
11
33°
23°
12
34°
24°
13
33°
24°
14
33°
26°
15
34°
28°
16
33°
30°
17
35°
30°
18
37°
30°
19
36°
30°
20
35°
29°
21
36°
25°
22
35°
23°
23
33°
21°
24
32°
20°
25
32°
18°
26
31°
17°
27
38°
27°
28
33°
25°
29
32°
21°
30
Hist. Avg.
36°
27°
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 46°, with overnight lows between 17° and 33°. The average high for December is 36° with an average low of 25°. 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.
