S
M
T
W
T
F
S
26
70°
43°
27
70°
45°
28
59°
46°
29
66°
43°
30
73°
45°
1
73°
48°
2
66°
46°
3
64°
50°
4
59°
50°
5
61°
46°
6
59°
43°
7
61°
39°
8
64°
48°
9
68°
45°
10
57°
43°
11
57°
32°
12
61°
34°
13
57°
43°
14
55°
41°
15
57°
40°
16
N/A
17
59°
44°
18
60°
50°
19
62°
51°
20
66°
52°
21
70°
53°
22
75°
54°
23
74°
52°
24
73°
55°
25
73°
54°
26
70°
50°
27
70°
49°
28
71°
50°
29
60°
44°
30
61°
46°
31
62°
48°
1
61°
45°
2
61°
45°
3
64°
51°
4
63°
52°
5
66°
53°
6
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Welland
Welland's May 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 44° and 55°. The average high for May is 66° with an average low of 50°. 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.
