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