S
M
T
W
T
F
S
29
40°
25°
30
42°
27°
1
41°
26°
2
39°
27°
3
41°
25°
4
40°
24°
5
40°
24°
6
37°
25°
7
40°
23°
8
37°
21°
9
31°
22°
10
33°
22°
11
35°
21°
12
34°
20°
13
33°
13°
14
35°
9°
15
29°
7°
16
22°
8°
17
24°
7°
18
22°
17°
19
29°
16°
20
33°
14°
21
30°
9°
22
27°
10°
23
28°
3°
24
27°
9°
25
24°
10°
26
26°
4°
27
24°
5°
28
19°
5°
29
24°
6°
30
21°
8°
31
23°
14°
1
32°
12°
2
32°
7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Monson
Monson's December 2026 forecast shows daily high temperatures ranging from 19° to 42°, with overnight lows between 3° and 27°. The average high for December is 31° with an average low of 15°. 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 Monson. See also: January | February | March.
