S
M
T
W
T
F
S
29
58°
33°
30
74°
50°
31
70°
45°
1
47°
37°
2
70°
35°
3
67°
50°
4
63°
43°
5
46°
35°
6
48°
33°
7
41°
22°
8
62°
29°
9
63°
53°
10
56°
37°
11
57°
34°
12
79°
46°
13
81°
60°
14
79°
61°
15
71°
59°
16
72°
54°
17
79°
46°
18
72°
41°
19
48°
27°
20
49°
39°
21
70°
48°
22
75°
52°
23
77°
56°
24
73°
48°
25
64°
44°
26
65°
44°
27
64°
47°
28
61°
43°
29
55°
41°
30
54°
40°
1
55°
42°
2
59°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Ontario
Ontario's April 2026 forecast shows daily high temperatures ranging from 48° to 77°, with overnight lows between 27° and 56°. The average high for April is 62° with an average low of 44°. 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 Ontario. See also: May | June | July.
