S
M
T
W
T
F
S
30
96°
75°
31
97°
74°
1
100°
72°
2
97°
73°
3
97°
71°
4
95°
71°
5
97°
69°
6
93°
69°
7
92°
72°
8
93°
71°
9
95°
69°
10
88°
65°
11
82°
58°
12
81°
57°
13
82°
61°
14
79°
57°
15
84°
63°
16
84°
62°
17
83°
63°
18
84°
63°
19
84°
64°
20
83°
63°
21
84°
63°
22
83°
62°
23
83°
62°
24
82°
61°
25
82°
61°
26
81°
59°
27
82°
60°
28
82°
59°
29
81°
60°
30
81°
59°
1
80°
58°
2
80°
58°
3
79°
57°
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 79° to 100°, with overnight lows between 57° and 73°. The average high for September is 86° with an average low of 63°. 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.
