S
M
T
W
T
F
S
30
71°
61°
31
83°
66°
1
87°
70°
2
79°
63°
3
79°
58°
4
78°
57°
5
76°
57°
6
76°
53°
7
75°
50°
8
70°
51°
9
73°
55°
10
74°
50°
11
70°
48°
12
69°
48°
13
68°
50°
14
71°
47°
15
76°
53°
16
76°
52°
17
73°
51°
18
70°
51°
19
75°
53°
20
75°
53°
21
74°
52°
22
75°
52°
23
75°
51°
24
74°
51°
25
74°
50°
26
73°
49°
27
74°
50°
28
73°
49°
29
71°
48°
30
70°
48°
1
70°
47°
2
71°
49°
3
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Branch
West Branch's September 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 47° and 70°. The average high for September is 74° with an average low of 52°. 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.
