S
M
T
W
T
F
S
30
61°
51°
31
62°
51°
1
62°
50°
2
58°
49°
3
60°
49°
4
57°
48°
5
59°
47°
6
60°
46°
7
63°
46°
8
59°
44°
9
59°
45°
10
56°
44°
11
58°
41°
12
58°
40°
13
57°
48°
14
55°
46°
15
54°
44°
16
56°
43°
17
53°
44°
18
54°
45°
19
52°
46°
20
54°
46°
21
52°
38°
22
50°
40°
23
50°
40°
24
49°
36°
25
52°
36°
26
49°
35°
27
47°
36°
28
49°
37°
29
49°
36°
30
48°
34°
1
47°
35°
2
46°
35°
3
47°
36°
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 46° to 63°, with overnight lows between 34° and 51°. The average high for September is 54° with an average low of 42°. 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.
