S
M
T
W
T
F
S
29
47°
39°
30
56°
39°
1
54°
38°
2
54°
34°
3
44°
30°
4
49°
31°
5
52°
38°
6
50°
32°
7
42°
29°
8
41°
24°
9
41°
26°
10
42°
25°
11
40°
24°
12
40°
23°
13
42°
22°
14
43°
23°
15
43°
30°
16
45°
33°
17
44°
32°
18
49°
26°
19
47°
22°
20
42°
20°
21
39°
20°
22
40°
23°
23
44°
25°
24
40°
22°
25
40°
21°
26
39°
20°
27
40°
21°
28
39°
21°
29
40°
24°
30
43°
24°
31
45°
21°
1
41°
17°
2
38°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Altamont
Altamont's December 2026 forecast shows daily high temperatures ranging from 38° to 56°, with overnight lows between 16° and 39°. The average high for December is 44° with an average low of 26°. 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 Altamont. See also: January | February | March.
