S
M
T
W
T
F
S
30
93°
68°
31
92°
67°
1
91°
66°
2
91°
66°
3
89°
65°
4
88°
61°
5
88°
65°
6
89°
64°
7
90°
65°
8
89°
64°
9
88°
65°
10
89°
64°
11
88°
62°
12
83°
61°
13
82°
63°
14
83°
63°
15
82°
62°
16
83°
62°
17
82°
61°
18
83°
61°
19
81°
55°
20
80°
54°
21
79°
54°
22
80°
55°
23
82°
58°
24
83°
59°
25
84°
60°
26
83°
58°
27
82°
57°
28
78°
53°
29
77°
51°
30
79°
57°
1
81°
58°
2
Hist. Avg.
79°
56°
3
Hist. Avg.
79°
56°
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 77° to 93°, with overnight lows between 51° and 68°. The average high for September is 85° with an average low of 61°. 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.
