S
M
T
W
T
F
S
30
84°
53°
31
79°
52°
1
76°
53°
2
77°
59°
3
77°
53°
4
80°
59°
5
77°
59°
6
82°
54°
7
80°
52°
8
73°
51°
9
75°
51°
10
73°
57°
11
75°
51°
12
78°
49°
13
72°
50°
14
71°
55°
15
74°
57°
16
76°
47°
17
78°
47°
18
69°
48°
19
68°
48°
20
68°
47°
21
69°
49°
22
67°
48°
23
66°
49°
24
68°
51°
25
70°
50°
26
73°
53°
27
72°
50°
28
74°
44°
29
66°
44°
30
64°
49°
1
65°
50°
2
70°
51°
3
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rock
Rock's September 2026 forecast shows daily high temperatures ranging from 64° to 84°, with overnight lows between 44° and 59°. The average high for September is 73° with an average low of 51°. 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 Rock. See also: October | November | December.