S
M
T
W
T
F
S
29
49°
23°
30
61°
29°
31
41°
33°
1
38°
28°
2
42°
26°
3
69°
36°
4
39°
31°
5
50°
32°
6
40°
24°
7
31°
18°
8
44°
15°
9
65°
28°
10
47°
35°
11
47°
30°
12
47°
24°
13
64°
41°
14
48°
39°
15
50°
40°
16
63°
44°
17
69°
43°
18
75°
45°
19
46°
24°
20
39°
22°
21
42°
32°
22
56°
38°
23
60°
39°
24
62°
43°
25
60°
41°
26
57°
40°
27
57°
40°
28
54°
41°
29
59°
42°
30
55°
40°
1
52°
38°
2
58°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Ottawa International Airport
Ottawa International Airport's April 2026 forecast shows daily high temperatures ranging from 39° to 62°, with overnight lows between 22° and 43°. The average high for April is 54° with an average low of 37°. 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 Ottawa International Airport. See also: May | June | July.
