S
M
T
W
T
F
S
29
33°
25°
30
34°
28°
1
33°
32°
2
36°
32°
3
39°
31°
4
41°
32°
5
39°
32°
6
43°
31°
7
41°
31°
8
39°
30°
9
37°
30°
10
35°
29°
11
41°
26°
12
36°
26°
13
35°
15°
14
34°
14°
15
29°
18°
16
31°
19°
17
28°
25°
18
34°
26°
19
34°
20°
20
35°
25°
21
35°
26°
22
34°
27°
23
39°
26°
24
41°
21°
25
38°
16°
26
33°
17°
27
27°
21°
28
32°
24°
29
38°
23°
30
38°
26°
31
39°
27°
1
40°
20°
2
41°
14°
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 43°, with overnight lows between 14° and 32°. The average high for December is 36° 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 Mount Pleasant. See also: January | February | March.
