S
M
T
W
T
F
S
30
75°
59°
31
75°
59°
1
76°
61°
2
75°
62°
3
74°
60°
4
75°
64°
5
74°
64°
6
76°
65°
7
81°
65°
8
80°
64°
9
78°
63°
10
76°
64°
11
77°
64°
12
76°
63°
13
78°
63°
14
72°
62°
15
71°
61°
16
70°
59°
17
70°
60°
18
74°
61°
19
72°
60°
20
73°
59°
21
80°
61°
22
79°
54°
23
77°
51°
24
69°
50°
25
68°
58°
26
69°
57°
27
73°
59°
28
75°
57°
29
76°
55°
30
75°
53°
1
74°
56°
2
73°
56°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Haven
West Haven's September 2026 forecast shows daily high temperatures ranging from 68° to 81°, with overnight lows between 50° and 65°. The average high for September is 75° with an average low of 60°. 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 West Haven. See also: October | November | December.
