S
M
T
W
T
F
S
29
50°
24°
30
61°
30°
31
46°
36°
1
37°
29°
2
40°
27°
3
64°
34°
4
46°
32°
5
46°
29°
6
39°
25°
7
27°
16°
8
41°
16°
9
64°
30°
10
40°
30°
11
45°
29°
12
41°
28°
13
60°
36°
14
66°
41°
15
62°
41°
16
70°
49°
17
67°
47°
18
59°
34°
19
41°
28°
20
37°
25°
21
49°
33°
22
60°
34°
23
60°
41°
24
54°
41°
25
54°
36°
26
56°
40°
27
60°
43°
28
50°
42°
29
52°
41°
30
52°
39°
1
49°
37°
2
52°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Orillia
Orillia's April 2026 forecast shows daily high temperatures ranging from 49° to 60°, with overnight lows between 33° and 43°. The average high for April is 54° with an average low of 39°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Orillia. See also: May | June | July.