S
M
T
W
T
F
S
30
78°
48°
31
73°
46°
1
70°
49°
2
71°
46°
3
71°
48°
4
72°
47°
5
70°
48°
6
71°
51°
7
71°
51°
8
72°
49°
9
71°
47°
10
70°
48°
11
69°
51°
12
70°
52°
13
69°
51°
14
72°
48°
15
71°
50°
16
75°
45°
17
73°
50°
18
74°
50°
19
75°
52°
20
Hist. Avg.
67°
47°
21
Hist. Avg.
67°
47°
22
Hist. Avg.
66°
46°
23
Hist. Avg.
66°
46°
24
Hist. Avg.
65°
46°
25
Hist. Avg.
65°
45°
26
Hist. Avg.
64°
45°
27
Hist. Avg.
64°
44°
28
Hist. Avg.
63°
44°
29
Hist. Avg.
63°
44°
30
Hist. Avg.
62°
43°
1
Hist. Avg.
62°
43°
2
Hist. Avg.
62°
42°
3
Hist. Avg.
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Onaway
Onaway's September 2026 forecast shows daily high temperatures ranging from 69° to 78°, with overnight lows between 45° and 52°. The average high for September is 72° 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 Onaway. See also: October | November | December.
