S
M
T
W
T
F
S
30
92°
66°
31
88°
64°
1
89°
56°
2
86°
50°
3
83°
54°
4
84°
57°
5
93°
55°
6
81°
66°
7
89°
70°
8
103°
71°
9
105°
72°
10
99°
73°
11
92°
69°
12
89°
67°
13
88°
64°
14
86°
61°
15
81°
61°
16
81°
61°
17
83°
63°
18
83°
56°
19
86°
58°
20
86°
72°
21
78°
65°
22
85°
64°
23
93°
58°
24
89°
58°
25
93°
61°
26
97°
61°
27
87°
67°
28
84°
67°
29
87°
54°
30
91°
56°
1
91°
67°
2
104°
75°
3
98°
74°
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 91° to 104°, with overnight lows between 67° and 75°. The average high for September is 98° with an average low of 72°. 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.
