S
M
T
W
T
F
S
26
86°
68°
27
87°
70°
28
83°
68°
29
83°
63°
30
87°
63°
31
85°
66°
1
82°
69°
2
74°
62°
3
83°
58°
4
84°
66°
5
82°
65°
6
83°
64°
7
81°
68°
8
82°
67°
9
83°
66°
10
80°
64°
11
80°
60°
12
77°
62°
13
77°
60°
14
80°
61°
15
76°
59°
16
76°
64°
17
85°
67°
18
84°
68°
19
86°
67°
20
81°
66°
21
81°
66°
22
83°
67°
23
85°
67°
24
81°
66°
25
80°
66°
26
80°
65°
27
81°
65°
28
79°
64°
29
81°
64°
30
79°
65°
31
82°
64°
1
81°
63°
2
75°
60°
3
74°
63°
4
74°
63°
5
79°
62°
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 74° to 86°, with overnight lows between 58° and 69°. The average high for August is 80° with an average low of 64°. 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.