S
M
T
W
T
F
S
30
88°
64°
31
80°
65°
1
83°
58°
2
83°
55°
3
78°
60°
4
83°
64°
5
85°
65°
6
86°
62°
7
85°
63°
8
80°
62°
9
78°
59°
10
81°
55°
11
76°
54°
12
77°
57°
13
78°
60°
14
79°
61°
15
80°
62°
16
82°
61°
17
80°
56°
18
81°
49°
19
73°
50°
20
71°
53°
21
73°
56°
22
78°
59°
23
80°
60°
24
79°
57°
25
80°
48°
26
78°
49°
27
69°
47°
28
68°
46°
29
69°
48°
30
69°
46°
1
Hist. Avg.
72°
48°
2
Hist. Avg.
71°
48°
3
Hist. Avg.
71°
48°
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 68° to 88°, with overnight lows between 46° and 65°. The average high for September is 78° with an average low of 57°. 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.
