S
M
T
W
T
F
S
26
56°
38°
27
62°
45°
28
56°
44°
29
50°
39°
30
52°
35°
1
47°
36°
2
47°
35°
3
49°
38°
4
51°
39°
5
53°
41°
6
57°
43°
7
56°
43°
8
57°
42°
9
55°
40°
10
59°
43°
11
59°
44°
12
62°
49°
13
64°
41°
14
55°
39°
15
56°
39°
16
57°
40°
17
58°
43°
18
60°
50°
19
65°
44°
20
58°
42°
21
58°
41°
22
59°
42°
23
60°
43°
24
63°
52°
25
67°
48°
26
61°
46°
27
61°
44°
28
62°
49°
29
68°
53°
30
72°
52°
31
66°
50°
1
69°
53°
2
73°
56°
3
74°
55°
4
74°
50°
5
64°
49°
6
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oshawa
Oshawa's May 2026 forecast shows daily high temperatures ranging from 47° to 74°, with overnight lows between 35° and 56°. The average high for May is 60° 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 May weather will actually feel in Oshawa. See also: June | July | August.
