S
M
T
W
T
F
S
30
81°
32°
31
74°
38°
1
75°
37°
2
81°
36°
3
74°
35°
4
74°
33°
5
75°
35°
6
77°
36°
7
79°
33°
8
77°
29°
9
70°
32°
10
73°
34°
11
70°
33°
12
71°
32°
13
72°
31°
14
71°
28°
15
65°
30°
16
68°
28°
17
70°
28°
18
67°
27°
19
65°
31°
20
66°
27°
21
67°
27°
22
71°
30°
23
72°
31°
24
74°
32°
25
66°
25°
26
64°
33°
27
66°
25°
28
61°
23°
29
59°
30°
30
60°
36°
1
65°
33°
2
70°
25°
3
74°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Banner
Banner's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 22° and 38°. The average high for September is 70° with an average low of 31°. 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 Banner. See also: October | November | December.
