S
M
T
W
T
F
S
26
85°
65°
27
85°
69°
28
82°
67°
29
83°
63°
30
85°
61°
31
89°
66°
1
81°
69°
2
78°
65°
3
75°
62°
4
80°
64°
5
84°
65°
6
82°
66°
7
83°
66°
8
81°
65°
9
82°
64°
10
79°
63°
11
76°
62°
12
77°
63°
13
76°
63°
14
78°
62°
15
76°
58°
16
76°
60°
17
85°
67°
18
84°
67°
19
86°
66°
20
82°
65°
21
82°
65°
22
83°
64°
23
85°
66°
24
83°
66°
25
80°
65°
26
81°
65°
27
81°
64°
28
79°
64°
29
80°
63°
30
79°
64°
31
80°
63°
1
82°
62°
2
75°
59°
3
74°
60°
4
76°
61°
5
79°
61°
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.