S
M
T
W
T
F
S
30
67°
53°
31
67°
52°
1
66°
48°
2
65°
47°
3
64°
46°
4
60°
53°
5
65°
49°
6
64°
45°
7
64°
45°
8
58°
48°
9
59°
48°
10
60°
52°
11
62°
51°
12
63°
49°
13
63°
49°
14
59°
48°
15
62°
47°
16
62°
46°
17
58°
45°
18
57°
43°
19
59°
42°
20
58°
47°
21
59°
48°
22
62°
42°
23
62°
41°
24
57°
43°
25
54°
46°
26
53°
43°
27
54°
43°
28
55°
45°
29
Hist. Avg.
56°
44°
30
Hist. Avg.
55°
44°
1
Hist. Avg.
55°
44°
2
Hist. Avg.
55°
43°
3
Hist. Avg.
54°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in South Branch
South Branch's September 2026 forecast shows daily high temperatures ranging from 53° to 67°, with overnight lows between 41° and 53°. The average high for September is 61° 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 South Branch. See also: October | November | December.
