S
M
T
W
T
F
S
26
49°
38°
27
63°
42°
28
64°
45°
29
51°
41°
30
55°
41°
1
50°
39°
2
50°
38°
3
59°
38°
4
68°
47°
5
65°
46°
6
49°
41°
7
56°
40°
8
58°
41°
9
64°
45°
10
57°
43°
11
54°
44°
12
51°
40°
13
63°
46°
14
47°
43°
15
68°
43°
16
72°
53°
17
80°
52°
18
83°
47°
19
81°
59°
20
65°
47°
21
55°
44°
22
57°
47°
23
59°
45°
24
N/A
25
70°
54°
26
77°
59°
27
73°
51°
28
68°
51°
29
68°
49°
30
63°
48°
31
66°
50°
1
69°
54°
2
67°
52°
3
70°
57°
4
71°
55°
5
71°
57°
6
69°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Thorold
Thorold's May 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 48° and 59°. 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 Thorold. See also: June | July | August.
