S
M
T
W
T
F
S
26
77°
56°
27
70°
59°
28
73°
58°
29
65°
53°
30
62°
43°
1
59°
44°
2
54°
40°
3
64°
34°
4
78°
53°
5
68°
48°
6
60°
46°
7
63°
41°
8
71°
44°
9
77°
55°
10
73°
57°
11
74°
50°
12
79°
46°
13
74°
57°
14
68°
44°
15
76°
46°
16
80°
65°
17
85°
64°
18
84°
66°
19
85°
65°
20
73°
59°
21
67°
56°
22
64°
61°
23
72°
61°
24
76°
63°
25
79°
61°
26
72°
65°
27
81°
69°
28
86°
61°
29
81°
64°
30
79°
58°
31
78°
60°
1
82°
59°
2
82°
56°
3
82°
59°
4
84°
65°
5
82°
63°
6
85°
65°
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 78° to 86°, with overnight lows between 56° and 65°. The average high for May is 82° with an average low of 61°. 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.