S
M
T
W
T
F
S
30
71°
55°
31
70°
52°
1
69°
63°
2
72°
57°
3
73°
55°
4
71°
54°
5
71°
53°
6
71°
48°
7
77°
56°
8
75°
60°
9
70°
56°
10
65°
45°
11
69°
47°
12
73°
54°
13
69°
51°
14
64°
47°
15
66°
49°
16
67°
47°
17
67°
46°
18
65°
47°
19
62°
45°
20
61°
44°
21
58°
49°
22
63°
49°
23
65°
48°
24
67°
49°
25
67°
48°
26
64°
45°
27
65°
47°
28
66°
47°
29
67°
49°
30
68°
50°
1
68°
50°
2
65°
46°
3
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North Bay
North Bay's September 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 43° and 60°. The average high for September is 67° 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 Bay. See also: October | November | December.
