S
M
T
W
T
F
S
26
58°
37°
27
65°
40°
28
62°
50°
29
50°
40°
30
54°
39°
1
50°
34°
2
47°
35°
3
55°
46°
4
61°
51°
5
56°
43°
6
54°
39°
7
49°
35°
8
50°
40°
9
53°
41°
10
55°
42°
11
54°
42°
12
57°
43°
13
57°
45°
14
56°
42°
15
59°
40°
16
58°
41°
17
60°
44°
18
61°
49°
19
66°
49°
20
67°
48°
21
68°
50°
22
66°
45°
23
62°
48°
24
66°
43°
25
61°
42°
26
62°
50°
27
63°
52°
28
72°
51°
29
66°
49°
30
65°
47°
31
65°
43°
1
63°
45°
2
62°
44°
3
64°
46°
4
65°
45°
5
65°
48°
6
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mississauga
Mississauga's May 2026 forecast shows daily high temperatures ranging from 47° to 72°, with overnight lows between 34° and 52°. 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 Mississauga. See also: June | July | August.
