S
M
T
W
T
F
S
30
79°
53°
31
79°
54°
1
69°
61°
2
75°
61°
3
78°
61°
4
84°
59°
5
76°
55°
6
73°
49°
7
80°
54°
8
80°
54°
9
78°
67°
10
82°
58°
11
74°
48°
12
76°
54°
13
81°
58°
14
79°
56°
15
74°
55°
16
72°
54°
17
72°
51°
18
70°
51°
19
72°
52°
20
71°
48°
21
66°
52°
22
65°
52°
23
65°
51°
24
69°
51°
25
69°
50°
26
72°
48°
27
64°
45°
28
67°
47°
29
71°
50°
30
71°
50°
1
70°
49°
2
69°
50°
3
68°
48°
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 64° to 82°, with overnight lows between 45° and 67°. The average high for September is 72° with an average low of 52°. 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.
