S
M
T
W
T
F
S
30
102°
72°
31
101°
76°
1
99°
75°
2
99°
74°
3
94°
74°
4
99°
73°
5
101°
75°
6
100°
72°
7
100°
74°
8
100°
77°
9
101°
82°
10
98°
75°
11
99°
73°
12
101°
75°
13
100°
75°
14
99°
76°
15
101°
80°
16
101°
74°
17
100°
76°
18
99°
73°
19
99°
73°
20
99°
73°
21
90°
70°
22
89°
66°
23
88°
64°
24
92°
66°
25
89°
68°
26
89°
67°
27
88°
65°
28
88°
64°
29
87°
65°
30
86°
62°
1
83°
63°
2
84°
60°
3
84°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockwell
Rockwell's September 2026 forecast shows daily high temperatures ranging from 83° to 99°, with overnight lows between 60° and 73°. The average high for September is 89° with an average low of 66°. 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 Rockwell. See also: October | November | December.