S
M
T
W
T
F
S
26
67°
39°
27
74°
41°
28
75°
48°
29
66°
53°
30
53°
39°
1
56°
36°
2
49°
38°
3
55°
36°
4
65°
43°
5
72°
49°
6
49°
43°
7
55°
44°
8
55°
40°
9
66°
37°
10
62°
45°
11
55°
43°
12
58°
40°
13
53°
42°
14
55°
50°
15
70°
52°
16
74°
59°
17
74°
48°
18
73°
60°
19
86°
63°
20
73°
46°
21
62°
46°
22
65°
49°
23
64°
51°
24
70°
54°
25
72°
55°
26
70°
57°
27
73°
59°
28
64°
50°
29
65°
53°
30
66°
53°
31
68°
52°
1
65°
52°
2
65°
49°
3
66°
47°
4
66°
47°
5
67°
55°
6
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Longueuil
Longueuil's May 2026 forecast shows daily high temperatures ranging from 55° to 86°, with overnight lows between 46° and 63°. The average high for May is 69° 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 Longueuil. See also: June | July | August.
