S
M
T
W
T
F
S
26
66°
42°
27
74°
42°
28
75°
51°
29
63°
54°
30
54°
40°
1
55°
37°
2
50°
40°
3
56°
39°
4
66°
46°
5
70°
49°
6
49°
42°
7
54°
43°
8
55°
44°
9
66°
39°
10
61°
47°
11
56°
42°
12
57°
43°
13
51°
46°
14
55°
46°
15
67°
51°
16
74°
52°
17
75°
57°
18
71°
49°
19
83°
58°
20
76°
49°
21
61°
43°
22
68°
40°
23
69°
46°
24
59°
51°
25
70°
53°
26
82°
56°
27
72°
63°
28
67°
53°
29
61°
45°
30
65°
50°
31
68°
48°
1
68°
51°
2
69°
52°
3
73°
58°
4
79°
60°
5
78°
57°
6
74°
58°
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 61° to 79°, with overnight lows between 45° and 60°. The average high for May is 70° with an average low of 53°. 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.
