S
M
T
W
T
F
S
26
88°
73°
27
88°
73°
28
86°
72°
29
87°
73°
30
89°
72°
31
87°
69°
1
87°
69°
2
88°
72°
3
87°
73°
4
87°
71°
5
88°
71°
6
88°
72°
7
90°
73°
8
87°
73°
9
91°
72°
10
92°
72°
11
91°
72°
12
91°
73°
13
90°
71°
14
89°
70°
15
92°
71°
16
92°
72°
17
91°
72°
18
91°
71°
19
90°
68°
20
91°
67°
21
87°
68°
22
86°
67°
23
87°
67°
24
87°
68°
25
88°
67°
26
87°
67°
27
87°
68°
28
88°
67°
29
90°
67°
30
90°
68°
31
89°
67°
1
89°
68°
2
90°
67°
3
88°
66°
4
85°
67°
5
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Summerville
Summerville's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 66° and 73°. The average high for August is 89° with an average low of 70°. 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 Summerville. See also: September | October | November.
