S
M
T
W
T
F
S
29
39°
23°
30
26°
19°
1
24°
22°
2
38°
24°
3
38°
23°
4
33°
23°
5
32°
22°
6
30°
17°
7
22°
19°
8
36°
21°
9
37°
22°
10
36°
21°
11
36°
21°
12
35°
20°
13
36°
21°
14
29°
18°
15
30°
18°
16
29°
13°
17
30°
12°
18
23°
0°
19
22°
-1°
20
16°
15°
21
30°
17°
22
30°
13°
23
28°
13°
24
23°
12°
25
28°
14°
26
27°
12°
27
28°
1°
28
25°
-2°
29
14°
-3°
30
13°
-4°
31
12°
-3°
1
12°
10°
2
15°
13°
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 12° to 39°, with overnight lows between -4° and 24°. The average high for December is 27° with an average low of 14°. 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.
