S
M
T
W
T
F
S
30
62°
50°
31
66°
51°
1
60°
47°
2
59°
45°
3
58°
45°
4
59°
44°
5
58°
42°
6
57°
46°
7
58°
46°
8
57°
44°
9
57°
43°
10
58°
43°
11
56°
42°
12
57°
43°
13
56°
42°
14
55°
41°
15
54°
42°
16
54°
43°
17
53°
45°
18
54°
45°
19
55°
43°
20
52°
44°
21
52°
46°
22
Hist. Avg.
54°
40°
23
Hist. Avg.
54°
40°
24
Hist. Avg.
53°
40°
25
Hist. Avg.
53°
39°
26
Hist. Avg.
52°
39°
27
Hist. Avg.
52°
38°
28
Hist. Avg.
51°
38°
29
Hist. Avg.
51°
38°
30
Hist. Avg.
50°
37°
1
Hist. Avg.
50°
37°
2
Hist. Avg.
49°
36°
3
Hist. Avg.
49°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rainbow
Rainbow's September 2026 forecast shows daily high temperatures ranging from 52° to 66°, with overnight lows between 41° and 51°. The average high for September is 57° with an average low of 44°. 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.
