S
M
T
W
T
F
S
30
83°
64°
31
82°
64°
1
83°
60°
2
75°
56°
3
74°
57°
4
75°
55°
5
75°
55°
6
77°
61°
7
81°
62°
8
80°
61°
9
76°
61°
10
78°
60°
11
80°
60°
12
80°
61°
13
81°
61°
14
80°
51°
15
73°
51°
16
69°
51°
17
72°
50°
18
78°
56°
19
79°
58°
20
79°
57°
21
77°
52°
22
76°
46°
23
68°
47°
24
67°
48°
25
68°
54°
26
72°
54°
27
74°
53°
28
73°
53°
29
73°
52°
30
72°
53°
1
74°
52°
2
72°
46°
3
71°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ansonia
Ansonia's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 42° and 64°. The average high for September is 76° with an average low of 55°. 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 Ansonia. See also: October | November | December.
