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