S
M
T
W
T
F
S
30
91°
70°
31
92°
71°
1
92°
70°
2
93°
71°
3
93°
70°
4
92°
71°
5
92°
68°
6
93°
64°
7
89°
64°
8
88°
66°
9
86°
67°
10
89°
67°
11
89°
59°
12
86°
62°
13
80°
68°
14
90°
68°
15
89°
57°
16
90°
56°
17
78°
57°
18
77°
57°
19
77°
55°
20
78°
54°
21
77°
54°
22
77°
55°
23
78°
55°
24
78°
56°
25
79°
59°
26
81°
60°
27
84°
62°
28
84°
61°
29
83°
54°
30
78°
54°
1
75°
57°
2
82°
54°
3
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rocky
Rocky's September 2026 forecast shows daily high temperatures ranging from 75° to 93°, with overnight lows between 54° and 71°. The average high for September is 84° with an average low of 62°. 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 Rocky. See also: October | November | December.