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
56°
27°
4
73°
45°
5
64°
41°
6
46°
33°
7
48°
33°
8
53°
40°
9
59°
36°
10
52°
35°
11
49°
32°
12
50°
36°
13
52°
36°
14
56°
44°
15
61°
43°
16
59°
44°
17
63°
45°
18
62°
46°
19
60°
45°
20
61°
53°
21
60°
40°
22
60°
41°
23
61°
42°
24
63°
44°
25
67°
47°
26
67°
45°
27
62°
44°
28
68°
47°
29
65°
48°
30
71°
51°
31
73°
53°
1
73°
50°
2
68°
50°
3
71°
52°
4
74°
54°
5
74°
55°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Innisfil Heights
Innisfil Heights's May 2026 forecast shows daily high temperatures ranging from 48° to 74°, with overnight lows between 32° and 55°. The average high for May is 62° with an average low of 45°. 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 Innisfil Heights. See also: June | July | August.
