S
M
T
W
T
F
S
26
55°
44°
27
73°
43°
28
71°
48°
29
54°
42°
30
52°
37°
1
45°
37°
2
46°
36°
3
62°
35°
4
74°
51°
5
69°
47°
6
51°
43°
7
55°
40°
8
56°
46°
9
70°
52°
10
56°
44°
11
55°
38°
12
63°
32°
13
62°
45°
14
57°
45°
15
65°
38°
16
73°
54°
17
84°
62°
18
89°
65°
19
88°
64°
20
69°
49°
21
58°
46°
22
64°
46°
23
67°
57°
24
72°
59°
25
70°
60°
26
78°
63°
27
74°
62°
28
72°
55°
29
69°
53°
30
66°
52°
31
67°
56°
1
68°
59°
2
69°
59°
3
70°
60°
4
73°
61°
5
75°
58°
6
72°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mentor
Mentor's May 2026 forecast shows daily high temperatures ranging from 66° to 78°, with overnight lows between 52° and 63°. The average high for May is 71° with an average low of 58°. 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 Mentor. See also: June | July | August.