S
M
T
W
T
F
S
26
88°
79°
27
89°
80°
28
90°
80°
29
90°
79°
30
89°
79°
31
90°
78°
1
89°
79°
2
89°
78°
3
88°
77°
4
89°
75°
5
87°
75°
6
86°
76°
7
85°
75°
8
86°
76°
9
88°
75°
10
89°
76°
11
89°
75°
12
89°
75°
13
Hist. Avg.
87°
77°
14
Hist. Avg.
87°
77°
15
Hist. Avg.
87°
77°
16
Hist. Avg.
86°
77°
17
Hist. Avg.
86°
76°
18
Hist. Avg.
86°
76°
19
Hist. Avg.
86°
76°
20
Hist. Avg.
86°
76°
21
Hist. Avg.
86°
76°
22
Hist. Avg.
86°
76°
23
Hist. Avg.
86°
76°
24
Hist. Avg.
86°
76°
25
Hist. Avg.
86°
76°
26
Hist. Avg.
86°
76°
27
Hist. Avg.
86°
76°
28
Hist. Avg.
85°
76°
29
Hist. Avg.
85°
76°
30
Hist. Avg.
85°
75°
31
Hist. Avg.
85°
75°
1
Hist. Avg.
85°
75°
2
Hist. Avg.
85°
75°
3
Hist. Avg.
85°
75°
4
Hist. Avg.
84°
75°
5
Hist. Avg.
84°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Charleston
Charleston's August 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 75° and 80°. The average high for August is 88° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Charleston. See also: September | October | November.
