S
M
T
W
T
F
S
30
90°
74°
31
91°
73°
1
89°
73°
2
86°
72°
3
87°
73°
4
86°
73°
5
87°
72°
6
89°
73°
7
88°
72°
8
84°
69°
9
85°
68°
10
84°
68°
11
84°
70°
12
87°
71°
13
87°
71°
14
88°
67°
15
87°
66°
16
83°
65°
17
82°
66°
18
84°
67°
19
86°
66°
20
87°
65°
21
86°
69°
22
86°
69°
23
85°
67°
24
84°
64°
25
83°
63°
26
83°
63°
27
82°
67°
28
85°
67°
29
85°
66°
30
86°
66°
1
84°
65°
2
84°
67°
3
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Charleston Afb
Charleston Afb's September 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 63° and 74°. The average high for September is 86° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Charleston Afb. See also: October | November | December.
