S
M
T
W
T
F
S
29
47°
30°
30
67°
27°
31
53°
42°
1
42°
32°
2
47°
31°
3
74°
38°
4
50°
35°
5
46°
34°
6
42°
28°
7
33°
20°
8
42°
15°
9
62°
31°
10
47°
35°
11
50°
29°
12
47°
29°
13
69°
38°
14
72°
47°
15
60°
43°
16
63°
50°
17
63°
48°
18
65°
39°
19
44°
30°
20
40°
27°
21
47°
34°
22
62°
38°
23
60°
42°
24
50°
41°
25
51°
40°
26
56°
39°
27
57°
45°
28
54°
42°
29
55°
39°
30
53°
41°
1
52°
40°
2
51°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Oshawa
Oshawa's April 2026 forecast shows daily high temperatures ranging from 47° to 62°, with overnight lows between 34° and 45°. The average high for April is 54° with an average low of 40°. 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 Oshawa. See also: May | June | July.