S
M
T
W
T
F
S
29
48°
29°
30
43°
27°
1
45°
32°
2
44°
33°
3
45°
32°
4
46°
30°
5
41°
29°
6
36°
28°
7
36°
26°
8
38°
21°
9
29°
20°
10
30°
20°
11
30°
21°
12
35°
21°
13
37°
25°
14
35°
27°
15
37°
26°
16
38°
26°
17
41°
25°
18
41°
25°
19
36°
22°
20
32°
18°
21
26°
18°
22
36°
11°
23
30°
8°
24
24°
7°
25
25°
6°
26
23°
15°
27
26°
19°
28
39°
19°
29
37°
7°
30
37°
8°
31
22°
3°
1
22°
3°
2
19°
6°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Alpha
Alpha's December 2026 forecast shows daily high temperatures ranging from 19° to 48°, with overnight lows between 3° and 33°. The average high for December is 35° with an average low of 20°. 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 Alpha. See also: January | February | March.
