S
M
T
W
T
F
S
30
75°
65°
31
82°
53°
1
78°
55°
2
79°
58°
3
81°
62°
4
84°
64°
5
85°
64°
6
81°
60°
7
79°
59°
8
77°
55°
9
72°
51°
10
68°
49°
11
71°
47°
12
74°
51°
13
70°
52°
14
75°
53°
15
74°
51°
16
73°
51°
17
73°
53°
18
72°
51°
19
72°
51°
20
73°
52°
21
73°
50°
22
72°
50°
23
72°
51°
24
73°
53°
25
73°
52°
26
72°
51°
27
73°
50°
28
72°
50°
29
70°
49°
30
70°
50°
1
69°
49°
2
69°
47°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mentor
Mentor's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 46° and 64°. The average high for September is 74° 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 September weather will actually feel in Mentor. See also: October | November | December.
