S
M
T
W
T
F
S
30
86°
54°
31
78°
55°
1
78°
62°
2
83°
56°
3
83°
62°
4
84°
62°
5
86°
54°
6
84°
53°
7
77°
52°
8
76°
52°
9
76°
58°
10
80°
58°
11
81°
51°
12
75°
51°
13
76°
50°
14
75°
59°
15
78°
49°
16
82°
48°
17
73°
47°
18
72°
48°
19
72°
48°
20
73°
49°
21
71°
47°
22
71°
47°
23
72°
48°
24
75°
51°
25
77°
54°
26
78°
53°
27
79°
45°
28
71°
53°
29
71°
53°
30
77°
49°
1
72°
50°
2
71°
48°
3
67°
44°
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 86°, with overnight lows between 44° and 62°. The average high for September is 77° with an average low of 52°. 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.
