S
M
T
W
T
F
S
26
63°
32°
27
65°
35°
28
61°
46°
29
46°
35°
30
47°
34°
1
47°
31°
2
46°
28°
3
53°
45°
4
67°
44°
5
50°
36°
6
46°
36°
7
45°
35°
8
46°
35°
9
47°
35°
10
50°
37°
11
53°
41°
12
51°
39°
13
54°
41°
14
56°
44°
15
56°
43°
16
55°
42°
17
63°
46°
18
62°
44°
19
58°
43°
20
59°
46°
21
62°
44°
22
57°
40°
23
55°
39°
24
56°
40°
25
55°
40°
26
57°
41°
27
57°
41°
28
58°
42°
29
58°
41°
30
59°
46°
31
60°
47°
1
60°
45°
2
61°
46°
3
65°
50°
4
62°
47°
5
63°
53°
6
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Penetanguishene
Penetanguishene's May 2026 forecast shows daily high temperatures ranging from 45° to 70°, with overnight lows between 35° and 54°. The average high for May is 57° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Penetanguishene. See also: June | July | August.
