S
M
T
W
T
F
S
30
87°
68°
31
87°
67°
1
88°
69°
2
90°
69°
3
90°
68°
4
89°
69°
5
85°
69°
6
85°
64°
7
88°
64°
8
89°
67°
9
89°
66°
10
90°
67°
11
90°
67°
12
89°
66°
13
89°
65°
14
87°
66°
15
88°
66°
16
88°
66°
17
Hist. Avg.
84°
64°
18
Hist. Avg.
84°
63°
19
Hist. Avg.
84°
63°
20
Hist. Avg.
84°
63°
21
Hist. Avg.
83°
62°
22
Hist. Avg.
83°
62°
23
Hist. Avg.
82°
62°
24
Hist. Avg.
82°
61°
25
Hist. Avg.
82°
61°
26
Hist. Avg.
81°
60°
27
Hist. Avg.
81°
60°
28
Hist. Avg.
81°
60°
29
Hist. Avg.
80°
59°
30
Hist. Avg.
80°
59°
1
Hist. Avg.
80°
58°
2
Hist. Avg.
79°
58°
3
Hist. Avg.
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Wilton
Wilton's September 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 64° and 69°. The average high for September is 88° with an average low of 67°. 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.
