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
73°
52°
17
70°
49°
18
76°
63°
19
83°
68°
20
73°
43°
21
60°
44°
22
63°
50°
23
68°
53°
24
72°
54°
25
71°
54°
26
67°
52°
27
67°
54°
28
71°
55°
29
67°
58°
30
71°
54°
31
65°
53°
1
68°
54°
2
68°
55°
3
69°
55°
4
66°
56°
5
67°
56°
6
74°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Montréal-Ouest
Montréal-Ouest's May 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 43° and 68°. The average high for May is 69° with an average low of 54°. 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 Montréal-Ouest. See also: June | July | August.
