S
M
T
W
T
F
S
30
83°
62°
31
83°
62°
1
86°
61°
2
87°
61°
3
86°
54°
4
79°
57°
5
78°
61°
6
85°
58°
7
82°
53°
8
77°
52°
9
76°
59°
10
77°
60°
11
84°
59°
12
84°
59°
13
83°
58°
14
84°
53°
15
82°
53°
16
74°
55°
17
75°
48°
18
74°
48°
19
74°
45°
20
72°
45°
21
72°
47°
22
73°
53°
23
75°
50°
24
79°
54°
25
79°
54°
26
78°
53°
27
79°
54°
28
78°
50°
29
77°
49°
30
73°
49°
1
74°
50°
2
77°
51°
3
70°
42°
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 70° to 87°, with overnight lows between 42° and 62°. The average high for September is 79° with an average low of 54°. 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.
