S
M
T
W
T
F
S
30
33°
16°
1
28°
16°
2
24°
17°
3
31°
21°
4
28°
1°
5
33°
6°
6
37°
29°
7
36°
22°
8
28°
15°
9
44°
24°
10
43°
30°
11
30°
27°
12
33°
26°
13
29°
-1°
14
3°
-7°
15
27°
-4°
16
41°
20°
17
46°
34°
18
52°
27°
19
30°
21°
20
47°
28°
21
42°
27°
22
49°
28°
23
62°
36°
24
59°
33°
25
59°
52°
26
63°
47°
27
62°
44°
28
66°
25°
29
25°
14°
30
32°
13°
31
36°
29°
1
37°
26°
2
32°
25°
3
36°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Charleston
Charleston's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Charleston. See also: January | February | March.
