S
M
T
W
T
F
S
28
80°
59°
29
85°
65°
30
90°
77°
1
91°
79°
2
91°
80°
3
90°
70°
4
85°
70°
5
81°
67°
6
79°
70°
7
78°
66°
8
83°
63°
9
84°
67°
10
80°
71°
11
82°
66°
12
80°
62°
13
82°
61°
14
87°
61°
15
87°
75°
16
82°
67°
17
81°
61°
18
89°
71°
19
75°
58°
20
78°
54°
21
82°
66°
22
72°
59°
23
74°
58°
24
80°
64°
25
82°
69°
26
81°
69°
27
85°
69°
28
80°
65°
29
78°
66°
30
76°
64°
31
78°
65°
1
76°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mentor-on-the-Lake
Mentor-on-the-Lake's July 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 58° and 69°. The average high for July is 78° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Mentor-on-the-Lake. See also: August | September | October.