S
M
T
W
T
F
S
29
55°
31°
30
55°
33°
1
59°
35°
2
64°
29°
3
58°
30°
4
55°
42°
5
60°
46°
6
67°
43°
7
68°
34°
8
65°
32°
9
58°
41°
10
60°
42°
11
56°
41°
12
59°
37°
13
55°
30°
14
52°
29°
15
51°
40°
16
55°
41°
17
59°
42°
18
60°
44°
19
65°
45°
20
67°
40°
21
68°
36°
22
59°
34°
23
50°
32°
24
50°
41°
25
60°
40°
26
59°
33°
27
58°
27°
28
54°
29°
29
49°
25°
30
47°
22°
31
46°
24°
1
46°
27°
2
56°
32°
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 46° to 68°, with overnight lows between 22° and 46°. The average high for December is 57° with an average low of 35°. 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.
