S
M
T
W
T
F
S
30
85°
53°
31
85°
54°
1
84°
53°
2
82°
53°
3
83°
51°
4
81°
50°
5
79°
48°
6
78°
46°
7
80°
51°
8
82°
53°
9
84°
51°
10
82°
42°
11
76°
51°
12
79°
50°
13
80°
51°
14
81°
52°
15
82°
49°
16
80°
40°
17
69°
45°
18
78°
49°
19
68°
40°
20
77°
46°
21
Hist. Avg.
74°
43°
22
Hist. Avg.
73°
43°
23
Hist. Avg.
73°
42°
24
Hist. Avg.
72°
42°
25
Hist. Avg.
72°
42°
26
Hist. Avg.
72°
42°
27
Hist. Avg.
71°
41°
28
Hist. Avg.
71°
41°
29
Hist. Avg.
70°
41°
30
Hist. Avg.
70°
40°
1
Hist. Avg.
69°
40°
2
Hist. Avg.
69°
40°
3
Hist. Avg.
68°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mentor
Mentor's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 40° and 54°. The average high for September is 80° with an average low of 49°. 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.
