S
M
T
W
T
F
S
29
43°
24°
30
43°
16°
1
40°
14°
2
41°
22°
3
46°
23°
4
42°
20°
5
40°
16°
6
41°
18°
7
39°
12°
8
38°
16°
9
40°
22°
10
45°
22°
11
47°
21°
12
49°
22°
13
47°
22°
14
45°
13°
15
41°
12°
16
43°
12°
17
39°
11°
18
40°
8°
19
39°
10°
20
42°
11°
21
46°
14°
22
42°
9°
23
40°
11°
24
45°
10°
25
43°
12°
26
45°
15°
27
51°
14°
28
41°
12°
29
41°
15°
30
46°
10°
31
44°
12°
1
45°
14°
2
51°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Alpine
Alpine's December 2026 forecast shows daily high temperatures ranging from 38° to 51°, with overnight lows between 8° and 24°. The average high for December is 43° with an average low of 15°. 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 Alpine. See also: January | February | March.
