S
M
T
W
T
F
S
29
43°
29°
30
42°
28°
1
40°
27°
2
41°
29°
3
41°
30°
4
42°
30°
5
43°
31°
6
42°
29°
7
39°
27°
8
38°
30°
9
38°
31°
10
39°
35°
11
39°
36°
12
42°
37°
13
44°
37°
14
44°
36°
15
43°
39°
16
48°
36°
17
48°
34°
18
44°
33°
19
41°
29°
20
41°
27°
21
38°
27°
22
37°
28°
23
37°
31°
24
38°
34°
25
40°
35°
26
42°
34°
27
42°
32°
28
41°
33°
29
38°
31°
30
41°
34°
31
35°
25°
1
35°
24°
2
Hist. Avg.
45°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Monroe
Monroe's December 2026 forecast shows daily high temperatures ranging from 35° to 48°, with overnight lows between 24° and 39°. The average high for December is 41° with an average low of 31°. 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 Monroe. See also: January | February | March.