S
M
T
W
T
F
S
26
86°
64°
27
87°
65°
28
87°
65°
29
88°
66°
30
87°
66°
31
86°
65°
1
87°
65°
2
91°
66°
3
91°
68°
4
90°
67°
5
91°
69°
6
91°
64°
7
86°
63°
8
86°
63°
9
87°
64°
10
86°
63°
11
87°
64°
12
86°
63°
13
89°
66°
14
90°
67°
15
90°
66°
16
90°
66°
17
90°
67°
18
89°
66°
19
89°
66°
20
88°
65°
21
89°
66°
22
89°
66°
23
88°
65°
24
89°
65°
25
88°
66°
26
88°
65°
27
89°
65°
28
88°
64°
29
87°
65°
30
88°
66°
31
89°
65°
1
88°
64°
2
88°
63°
3
87°
64°
4
88°
64°
5
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Flat Rock
Flat Rock's August 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 63° and 69°. The average high for August is 88° with an average low of 65°. 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 Flat Rock. See also: September | October | November.