S
M
T
W
T
F
S
30
65°
50°
31
64°
54°
1
67°
53°
2
68°
55°
3
68°
53°
4
67°
49°
5
66°
49°
6
65°
54°
7
66°
54°
8
67°
52°
9
67°
54°
10
66°
55°
11
67°
55°
12
67°
52°
13
66°
49°
14
62°
50°
15
61°
51°
16
62°
53°
17
63°
52°
18
65°
51°
19
63°
52°
20
64°
52°
21
66°
51°
22
64°
50°
23
60°
48°
24
60°
51°
25
61°
48°
26
61°
47°
27
60°
48°
28
59°
52°
29
62°
50°
30
61°
50°
1
62°
51°
2
63°
48°
3
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wilton
Wilton's September 2026 forecast shows daily high temperatures ranging from 57° to 68°, with overnight lows between 45° and 55°. The average high for September is 64° with an average low of 51°. 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 Wilton. See also: October | November | December.
