S
M
T
W
T
F
S
30
76°
62°
31
71°
65°
1
84°
65°
2
75°
64°
3
76°
57°
4
75°
54°
5
74°
53°
6
74°
54°
7
75°
51°
8
76°
52°
9
75°
63°
10
73°
51°
11
72°
46°
12
78°
47°
13
73°
53°
14
64°
45°
15
69°
45°
16
69°
53°
17
70°
52°
18
65°
43°
19
64°
42°
20
68°
42°
21
57°
44°
22
61°
34°
23
66°
39°
24
67°
39°
25
N/A
26
71°
41°
27
73°
54°
28
67°
57°
29
71°
57°
30
70°
60°
1
68°
52°
2
64°
48°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Penetanguishene
Penetanguishene's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 48° and 60°. The average high for September is 68° with an average low of 54°. 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 Penetanguishene. See also: October | November | December.
