S
M
T
W
T
F
S
29
34°
21°
30
36°
21°
1
34°
19°
2
35°
7°
3
31°
2°
4
25°
2°
5
19°
3°
6
18°
4°
7
20°
-1°
8
19°
-2°
9
14°
-1°
10
14°
1°
11
17°
3°
12
18°
6°
13
22°
14°
14
26°
17°
15
31°
15°
16
31°
17°
17
30°
16°
18
32°
16°
19
31°
14°
20
31°
12°
21
27°
12°
22
26°
11°
23
26°
9°
24
27°
10°
25
22°
3°
26
21°
5°
27
21°
12°
28
27°
13°
29
29°
11°
30
14°
-9°
31
9°
-5°
1
Hist. Avg.
20°
1°
2
Hist. Avg.
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 9° to 36°, with overnight lows between -9° and 21°. The average high for December is 25° 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.
