S
M
T
W
T
F
S
26
88°
75°
27
88°
75°
28
97°
75°
29
97°
79°
30
91°
72°
31
93°
70°
1
90°
75°
2
88°
75°
3
85°
73°
4
89°
74°
5
88°
74°
6
88°
71°
7
90°
72°
8
89°
71°
9
88°
70°
10
90°
72°
11
93°
71°
12
92°
70°
13
90°
72°
14
93°
71°
15
87°
71°
16
86°
69°
17
91°
73°
18
92°
72°
19
93°
74°
20
93°
73°
21
92°
72°
22
90°
71°
23
91°
70°
24
91°
72°
25
90°
73°
26
91°
72°
27
90°
72°
28
88°
71°
29
88°
71°
30
91°
72°
31
90°
72°
1
89°
71°
2
90°
71°
3
85°
68°
4
85°
66°
5
86°
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 93°, with overnight lows between 66° and 75°. The average high for August is 90° 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.
