S
M
T
W
T
F
S
30
75°
55°
31
76°
58°
1
68°
62°
2
70°
63°
3
79°
62°
4
76°
58°
5
69°
56°
6
68°
50°
7
74°
45°
8
71°
51°
9
70°
56°
10
79°
62°
11
70°
49°
12
73°
60°
13
72°
55°
14
64°
40°
15
68°
53°
16
72°
56°
17
72°
57°
18
67°
49°
19
63°
47°
20
62°
44°
21
60°
42°
22
60°
44°
23
65°
44°
24
66°
45°
25
64°
42°
26
60°
39°
27
61°
46°
28
69°
45°
29
65°
41°
30
60°
38°
1
63°
44°
2
64°
45°
3
63°
42°
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 60° to 73°, with overnight lows between 38° and 60°. The average high for September is 65° with an average low of 46°. 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.
