S
M
T
W
T
F
S
29
88°
59°
30
79°
57°
31
68°
58°
1
70°
55°
2
67°
54°
3
80°
50°
4
85°
53°
5
85°
57°
6
77°
58°
7
78°
53°
8
80°
56°
9
76°
56°
10
73°
58°
11
70°
55°
12
64°
50°
13
63°
48°
14
71°
47°
15
74°
52°
16
71°
54°
17
76°
50°
18
82°
57°
19
80°
54°
20
78°
53°
21
67°
48°
22
67°
50°
23
72°
52°
24
75°
53°
25
71°
55°
26
69°
53°
27
68°
53°
28
72°
56°
29
74°
54°
30
77°
55°
1
78°
53°
2
73°
51°
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 67° to 82°, with overnight lows between 48° and 57°. The average high for April is 74° with an average low of 53°. 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.
