S
M
T
W
T
F
S
29
45°
34°
30
46°
34°
1
45°
33°
2
45°
33°
3
42°
32°
4
44°
32°
5
43°
31°
6
38°
28°
7
35°
24°
8
31°
21°
9
31°
25°
10
37°
29°
11
38°
29°
12
40°
28°
13
37°
29°
14
31°
25°
15
34°
24°
16
37°
26°
17
38°
27°
18
35°
23°
19
34°
21°
20
31°
15°
21
32°
17°
22
26°
20°
23
36°
24°
24
33°
22°
25
35°
12°
26
32°
12°
27
26°
10°
28
26°
10°
29
27°
14°
30
25°
20°
31
28°
15°
1
34°
10°
2
25°
8°
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 25° to 46°, with overnight lows between 8° and 34°. The average high for December is 35° with an average low of 23°. 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.
