S
M
T
W
T
F
S
26
55°
40°
27
52°
39°
28
54°
39°
29
52°
37°
30
53°
35°
1
54°
34°
2
51°
33°
3
53°
37°
4
52°
36°
5
53°
36°
6
55°
39°
7
55°
39°
8
56°
40°
9
57°
39°
10
56°
40°
11
56°
39°
12
57°
40°
13
59°
41°
14
58°
41°
15
57°
45°
16
58°
48°
17
59°
44°
18
59°
41°
19
62°
51°
20
71°
53°
21
72°
48°
22
62°
43°
23
62°
44°
24
64°
47°
25
69°
51°
26
73°
53°
27
74°
51°
28
73°
45°
29
70°
49°
30
74°
51°
31
66°
54°
1
70°
50°
2
67°
47°
3
67°
45°
4
64°
50°
5
67°
54°
6
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Montreal–Trudeau
Montreal–Trudeau's May 2026 forecast shows daily high temperatures ranging from 51° to 74°, with overnight lows between 33° and 56°. The average high for May is 61° 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 Montreal–Trudeau. See also: June | July | August.
