S
M
T
W
T
F
S
30
90°
57°
31
88°
56°
1
89°
57°
2
90°
58°
3
92°
58°
4
92°
60°
5
93°
60°
6
93°
59°
7
92°
60°
8
93°
60°
9
92°
59°
10
87°
59°
11
86°
60°
12
91°
60°
13
92°
61°
14
92°
60°
15
91°
59°
16
90°
58°
17
88°
59°
18
90°
59°
19
91°
59°
20
Hist. Avg.
88°
58°
21
Hist. Avg.
88°
58°
22
Hist. Avg.
88°
58°
23
Hist. Avg.
88°
58°
24
Hist. Avg.
87°
58°
25
Hist. Avg.
87°
58°
26
Hist. Avg.
87°
57°
27
Hist. Avg.
86°
57°
28
Hist. Avg.
86°
57°
29
Hist. Avg.
86°
57°
30
Hist. Avg.
85°
57°
1
Hist. Avg.
85°
56°
2
Hist. Avg.
85°
56°
3
Hist. Avg.
84°
56°
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 86° to 93°, with overnight lows between 56° and 61°. The average high for September is 91° with an average low of 59°. 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.
