S
M
T
W
T
F
S
30
73°
43°
31
72°
42°
1
71°
41°
2
72°
41°
3
66°
40°
4
63°
40°
5
63°
39°
6
64°
40°
7
62°
38°
8
62°
38°
9
63°
37°
10
62°
39°
11
63°
39°
12
63°
37°
13
62°
38°
14
64°
38°
15
61°
40°
16
62°
36°
17
61°
37°
18
62°
38°
19
65°
39°
20
63°
35°
21
61°
30°
22
58°
34°
23
59°
33°
24
59°
29°
25
60°
32°
26
64°
35°
27
60°
33°
28
61°
33°
29
63°
29°
30
57°
32°
1
61°
35°
2
61°
35°
3
56°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Avon
Avon's September 2026 forecast shows daily high temperatures ranging from 56° to 73°, with overnight lows between 29° and 43°. The average high for September is 63° with an average low of 37°. 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 Avon. See also: October | November | December.