S
M
T
W
T
F
S
29
36°
31°
30
45°
34°
1
47°
31°
2
49°
28°
3
47°
24°
4
36°
27°
5
39°
29°
6
43°
28°
7
45°
28°
8
38°
24°
9
36°
24°
10
38°
26°
11
40°
28°
12
38°
27°
13
39°
29°
14
42°
21°
15
43°
25°
16
33°
25°
17
42°
14°
18
42°
12°
19
29°
12°
20
Hist. Avg.
35°
19°
21
Hist. Avg.
35°
19°
22
Hist. Avg.
35°
18°
23
Hist. Avg.
34°
18°
24
Hist. Avg.
34°
18°
25
Hist. Avg.
34°
18°
26
Hist. Avg.
34°
17°
27
Hist. Avg.
34°
17°
28
Hist. Avg.
33°
17°
29
Hist. Avg.
33°
17°
30
Hist. Avg.
33°
16°
31
Hist. Avg.
33°
16°
1
Hist. Avg.
33°
16°
2
Hist. Avg.
32°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Monadnock State Park
Monadnock State Park's December 2026 forecast shows daily high temperatures ranging from 29° to 49°, with overnight lows between 12° and 34°. The average high for December is 40° with an average low of 25°. 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 Monadnock State Park. See also: January | February | March.
