S
M
T
W
T
F
S
30
74°
49°
31
73°
48°
1
74°
49°
2
72°
47°
3
72°
46°
4
73°
52°
5
75°
52°
6
74°
53°
7
70°
49°
8
73°
45°
9
70°
46°
10
75°
53°
11
77°
51°
12
76°
53°
13
76°
50°
14
75°
46°
15
70°
43°
16
68°
43°
17
66°
50°
18
70°
49°
19
75°
48°
20
72°
42°
21
76°
40°
22
69°
38°
23
63°
39°
24
Hist. Avg.
67°
44°
25
Hist. Avg.
67°
43°
26
Hist. Avg.
66°
43°
27
Hist. Avg.
66°
42°
28
Hist. Avg.
65°
42°
29
Hist. Avg.
65°
42°
30
Hist. Avg.
64°
42°
1
Hist. Avg.
64°
41°
2
Hist. Avg.
63°
41°
3
Hist. Avg.
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Branch
West Branch's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 38° and 53°. The average high for September is 72° with an average low of 47°. 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 West Branch. See also: October | November | December.
