S
M
T
W
T
F
S
26
82°
66°
27
92°
72°
28
82°
64°
29
82°
58°
30
83°
61°
31
80°
65°
1
73°
68°
2
81°
65°
3
82°
63°
4
84°
63°
5
85°
66°
6
78°
68°
7
88°
66°
8
90°
72°
9
89°
71°
10
90°
75°
11
91°
71°
12
86°
70°
13
89°
69°
14
83°
70°
15
83°
73°
16
87°
72°
17
81°
65°
18
82°
62°
19
82°
68°
20
82°
64°
21
82°
61°
22
81°
63°
23
79°
58°
24
76°
54°
25
81°
56°
26
88°
65°
27
82°
62°
28
83°
62°
29
83°
60°
30
90°
67°
31
94°
70°
1
98°
73°
2
98°
74°
3
98°
74°
4
98°
73°
5
96°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Charleston
Charleston's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August 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 August weather will actually feel in Charleston. See also: September | October | November.
