S
M
T
W
T
F
S
30
96°
75°
31
97°
74°
1
99°
68°
2
99°
71°
3
97°
72°
4
97°
73°
5
100°
70°
6
96°
73°
7
87°
71°
8
99°
70°
9
82°
71°
10
86°
63°
11
84°
62°
12
84°
64°
13
79°
59°
14
86°
72°
15
89°
64°
16
90°
68°
17
87°
65°
18
87°
68°
19
86°
65°
20
70°
56°
21
67°
54°
22
72°
54°
23
73°
57°
24
74°
56°
25
73°
57°
26
75°
58°
27
80°
60°
28
76°
59°
29
76°
58°
30
74°
58°
1
77°
57°
2
77°
57°
3
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mendon
Mendon's September 2026 forecast shows daily high temperatures ranging from 67° to 90°, with overnight lows between 54° and 72°. The average high for September is 78° with an average low of 60°. 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 Mendon. See also: October | November | December.
