S
M
T
W
T
F
S
26
59°
37°
27
67°
52°
28
61°
46°
29
54°
38°
30
50°
36°
1
49°
36°
2
49°
33°
3
48°
35°
4
58°
41°
5
59°
42°
6
60°
41°
7
58°
42°
8
60°
44°
9
59°
44°
10
58°
43°
11
60°
44°
12
64°
48°
13
64°
42°
14
58°
39°
15
58°
39°
16
59°
40°
17
59°
43°
18
61°
50°
19
66°
45°
20
60°
42°
21
60°
42°
22
61°
43°
23
62°
44°
24
65°
52°
25
71°
50°
26
64°
46°
27
63°
46°
28
64°
50°
29
69°
54°
30
74°
54°
31
67°
51°
1
71°
55°
2
75°
57°
3
76°
56°
4
76°
53°
5
67°
51°
6
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Welland
Welland's May 2026 forecast shows daily high temperatures ranging from 48° to 76°, with overnight lows between 33° and 57°. The average high for May is 62° with an average low of 45°. 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 Welland. See also: June | July | August.
