S
M
T
W
T
F
S
26
62°
31°
27
66°
35°
28
59°
47°
29
47°
34°
30
49°
34°
1
47°
34°
2
43°
29°
3
50°
44°
4
60°
46°
5
50°
38°
6
49°
36°
7
48°
35°
8
47°
35°
9
49°
38°
10
54°
39°
11
55°
38°
12
57°
42°
13
56°
44°
14
55°
42°
15
57°
39°
16
58°
42°
17
58°
44°
18
59°
48°
19
62°
48°
20
67°
47°
21
66°
49°
22
65°
45°
23
60°
47°
24
64°
43°
25
60°
42°
26
61°
49°
27
61°
51°
28
69°
50°
29
65°
48°
30
62°
44°
31
62°
42°
1
61°
43°
2
61°
43°
3
63°
44°
4
63°
45°
5
64°
49°
6
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Orillia
Orillia's May 2026 forecast shows daily high temperatures ranging from 43° to 69°, with overnight lows between 29° and 51°. The average high for May is 58° 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 Orillia. See also: June | July | August.
