S
M
T
W
T
F
S
29
43°
28°
30
46°
31°
1
47°
30°
2
45°
31°
3
47°
29°
4
45°
28°
5
45°
28°
6
42°
29°
7
45°
27°
8
39°
26°
9
36°
26°
10
36°
24°
11
37°
26°
12
36°
23°
13
37°
19°
14
38°
15°
15
32°
15°
16
30°
18°
17
31°
17°
18
30°
23°
19
35°
22°
20
39°
20°
21
35°
17°
22
31°
16°
23
30°
11°
24
32°
19°
25
31°
13°
26
35°
8°
27
28°
9°
28
24°
9°
29
28°
7°
30
26°
11°
31
27°
20°
1
40°
15°
2
38°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Keene
Keene's December 2026 forecast shows daily high temperatures ranging from 24° to 47°, with overnight lows between 7° and 31°. The average high for December is 36° 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 Keene. See also: January | February | March.
