S
M
T
W
T
F
S
29
35°
22°
30
34°
23°
1
35°
29°
2
35°
32°
3
40°
27°
4
40°
26°
5
38°
25°
6
38°
27°
7
36°
28°
8
35°
30°
9
36°
29°
10
37°
23°
11
36°
20°
12
35°
20°
13
36°
25°
14
39°
29°
15
38°
21°
16
41°
29°
17
37°
28°
18
43°
32°
19
44°
31°
20
41°
30°
21
42°
31°
22
42°
31°
23
41°
29°
24
41°
29°
25
38°
18°
26
40°
16°
27
30°
18°
28
25°
21°
29
30°
18°
30
34°
26°
31
31°
31°
1
39°
30°
2
40°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Monitor
Monitor's December 2026 forecast shows daily high temperatures ranging from 25° to 44°, with overnight lows between 16° and 32°. The average high for December is 37° with an average low of 26°. 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 Monitor. See also: January | February | March.
