S
M
T
W
T
F
S
30
96°
75°
31
97°
74°
1
99°
68°
2
97°
74°
3
96°
72°
4
95°
71°
5
97°
69°
6
96°
69°
7
92°
72°
8
93°
71°
9
95°
69°
10
88°
63°
11
82°
64°
12
83°
64°
13
81°
61°
14
78°
59°
15
79°
56°
16
84°
62°
17
83°
63°
18
77°
59°
19
80°
61°
20
82°
61°
21
78°
60°
22
80°
60°
23
79°
59°
24
80°
59°
25
80°
58°
26
71°
52°
27
68°
47°
28
67°
46°
29
68°
50°
30
72°
47°
1
71°
55°
2
73°
52°
3
66°
53°
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 66° to 97°, with overnight lows between 46° and 74°. The average high for September is 82° with an average low of 61°. 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.
