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