S
M
T
W
T
F
S
30
92°
66°
31
88°
64°
1
89°
56°
2
86°
50°
3
81°
57°
4
84°
57°
5
84°
66°
6
83°
67°
7
89°
64°
8
91°
67°
9
91°
67°
10
86°
66°
11
85°
60°
12
84°
62°
13
81°
61°
14
82°
63°
15
84°
64°
16
90°
65°
17
90°
65°
18
83°
59°
19
84°
61°
20
85°
62°
21
88°
64°
22
86°
64°
23
87°
65°
24
84°
62°
25
84°
64°
26
88°
65°
27
89°
65°
28
89°
64°
29
88°
65°
30
87°
63°
1
88°
64°
2
86°
64°
3
84°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rainbow
Rainbow's September 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 57° and 67°. The average high for September is 86° with an average low of 63°. 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 Rainbow. See also: October | November | December.
