S
M
T
W
T
F
S
30
81°
72°
31
93°
73°
1
93°
73°
2
97°
72°
3
97°
75°
4
97°
72°
5
95°
75°
6
84°
70°
7
81°
64°
8
89°
71°
9
79°
58°
10
81°
54°
11
84°
61°
12
81°
59°
13
75°
59°
14
76°
56°
15
74°
54°
16
73°
54°
17
75°
55°
18
72°
54°
19
72°
53°
20
75°
52°
21
76°
58°
22
76°
56°
23
78°
57°
24
78°
57°
25
79°
58°
26
78°
57°
27
78°
57°
28
77°
56°
29
77°
57°
30
75°
56°
1
73°
50°
2
64°
45°
3
64°
42°
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 89°, with overnight lows between 42° and 71°. The average high for September is 76° with an average low of 56°. 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.
