S
M
T
W
T
F
S
26
87°
72°
27
89°
72°
28
86°
73°
29
85°
72°
30
87°
73°
31
89°
74°
1
91°
73°
2
92°
74°
3
92°
74°
4
91°
73°
5
92°
74°
6
91°
73°
7
89°
73°
8
90°
74°
9
90°
72°
10
86°
69°
11
86°
71°
12
87°
72°
13
90°
73°
14
89°
73°
15
88°
72°
16
88°
72°
17
91°
72°
18
92°
72°
19
90°
70°
20
89°
71°
21
91°
72°
22
92°
71°
23
91°
70°
24
91°
69°
25
90°
69°
26
90°
68°
27
87°
70°
28
87°
70°
29
86°
67°
30
86°
67°
31
90°
68°
1
90°
69°
2
89°
68°
3
88°
70°
4
89°
70°
5
90°
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 74°. The average high for August is 89° with an average low of 71°. 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.
