S
M
T
W
T
F
S
30
71°
62°
31
76°
65°
1
81°
68°
2
78°
61°
3
75°
54°
4
74°
52°
5
71°
51°
6
72°
51°
7
75°
48°
8
76°
52°
9
73°
64°
10
68°
56°
11
70°
42°
12
80°
52°
13
68°
55°
14
63°
46°
15
70°
55°
16
67°
48°
17
71°
54°
18
65°
50°
19
60°
53°
20
64°
51°
21
63°
52°
22
65°
51°
23
66°
50°
24
68°
52°
25
65°
52°
26
63°
51°
27
64°
52°
28
65°
48°
29
63°
50°
30
64°
51°
1
64°
51°
2
66°
50°
3
64°
50°
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 60° to 71°, with overnight lows between 48° and 55°. The average high for September is 65° 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.
