S
M
T
W
T
F
S
30
79°
64°
31
86°
60°
1
82°
54°
2
84°
61°
3
87°
64°
4
82°
63°
5
79°
61°
6
81°
62°
7
82°
61°
8
79°
64°
9
78°
48°
10
79°
61°
11
83°
58°
12
75°
49°
13
62°
56°
14
68°
49°
15
68°
45°
16
70°
54°
17
66°
46°
18
68°
48°
19
65°
47°
20
68°
47°
21
67°
46°
22
70°
45°
23
72°
52°
24
73°
51°
25
72°
52°
26
73°
50°
27
72°
51°
28
72°
52°
29
69°
50°
30
70°
48°
1
63°
47°
2
65°
47°
3
65°
46°
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 62° to 83°, with overnight lows between 45° and 61°. The average high for September is 70° with an average low of 50°. 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.