S
M
T
W
T
F
S
29
35°
14°
30
36°
18°
1
35°
18°
2
37°
17°
3
36°
12°
4
33°
11°
5
34°
17°
6
32°
6°
7
29°
8°
8
36°
11°
9
37°
10°
10
35°
11°
11
22°
3°
12
24°
11°
13
30°
14°
14
29°
13°
15
32°
12°
16
35°
11°
17
33°
8°
18
33°
3°
19
27°
4°
20
26°
7°
21
25°
6°
22
33°
-1°
23
25°
-2°
24
20°
14°
25
32°
14°
26
33°
12°
27
33°
5°
28
32°
2°
29
29°
0°
30
26°
-1°
31
24°
-3°
1
22°
-3°
2
20°
-1°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Garrison
Garrison's December 2026 forecast shows daily high temperatures ranging from 20° to 37°, with overnight lows between -3° and 18°. The average high for December is 30° with an average low of 8°. 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 Garrison. See also: January | February | March.
