S
M
T
W
T
F
S
30
99°
73°
31
98°
75°
1
98°
74°
2
95°
74°
3
96°
73°
4
97°
74°
5
100°
75°
6
102°
75°
7
101°
76°
8
101°
76°
9
99°
77°
10
98°
74°
11
96°
73°
12
96°
72°
13
97°
73°
14
96°
70°
15
91°
69°
16
91°
69°
17
90°
70°
18
93°
65°
19
91°
66°
20
86°
62°
21
91°
68°
22
90°
67°
23
90°
68°
24
89°
68°
25
89°
67°
26
88°
67°
27
88°
66°
28
87°
66°
29
86°
65°
30
86°
64°
1
83°
57°
2
75°
54°
3
74°
54°
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 74° to 101°, with overnight lows between 54° and 77°. The average high for September is 90° with an average low of 68°. 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.
