S
M
T
W
T
F
S
30
67°
51°
31
71°
57°
1
73°
58°
2
69°
59°
3
74°
59°
4
75°
52°
5
76°
52°
6
67°
51°
7
65°
50°
8
70°
55°
9
72°
55°
10
74°
54°
11
72°
53°
12
69°
56°
13
69°
54°
14
73°
53°
15
67°
52°
16
66°
53°
17
64°
54°
18
67°
50°
19
69°
51°
20
65°
50°
21
68°
43°
22
62°
49°
23
61°
47°
24
67°
51°
25
69°
46°
26
67°
50°
27
64°
52°
28
66°
47°
29
67°
42°
30
59°
50°
1
65°
43°
2
68°
39°
3
57°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Owen Sound
Owen Sound's September 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 39° and 59°. The average high for September is 68° with an average low of 51°. 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 Owen Sound. See also: October | November | December.
