S
M
T
W
T
F
S
31
73°
50°
1
77°
53°
2
75°
55°
3
83°
58°
4
69°
52°
5
73°
51°
6
67°
52°
7
68°
47°
8
66°
48°
9
72°
48°
10
75°
52°
11
77°
53°
12
78°
55°
13
73°
54°
14
78°
55°
15
80°
60°
16
82°
57°
17
79°
57°
18
82°
58°
19
78°
63°
20
79°
61°
21
76°
62°
22
75°
64°
23
76°
64°
24
73°
63°
25
74°
61°
26
75°
57°
27
77°
58°
28
79°
60°
29
75°
55°
30
80°
55°
1
73°
59°
2
72°
55°
3
74°
51°
4
80°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Flat Rock
Flat Rock's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Flat Rock. See also: October | November | December.
