S
M
T
W
T
F
S
30
80°
52°
31
78°
55°
1
79°
56°
2
80°
58°
3
80°
51°
4
78°
48°
5
76°
53°
6
79°
48°
7
77°
55°
8
78°
57°
9
79°
56°
10
80°
56°
11
79°
55°
12
77°
55°
13
78°
53°
14
77°
51°
15
72°
49°
16
72°
51°
17
70°
46°
18
70°
50°
19
73°
48°
20
70°
49°
21
70°
41°
22
69°
40°
23
67°
44°
24
66°
49°
25
63°
50°
26
69°
51°
27
71°
51°
28
70°
47°
29
72°
41°
30
71°
36°
1
61°
35°
2
57°
35°
3
56°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North Branch
North Branch's September 2026 forecast shows daily high temperatures ranging from 56° to 80°, with overnight lows between 35° and 58°. The average high for September is 73° with an average low of 49°. 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 North Branch. See also: October | November | December.