S
M
T
W
T
F
S
30
77°
64°
31
76°
65°
1
81°
60°
2
76°
60°
3
77°
59°
4
76°
58°
5
75°
58°
6
78°
62°
7
79°
61°
8
77°
63°
9
80°
63°
10
74°
62°
11
77°
62°
12
79°
61°
13
79°
62°
14
78°
62°
15
79°
61°
16
79°
55°
17
77°
58°
18
70°
61°
19
76°
60°
20
78°
60°
21
77°
59°
22
76°
52°
23
74°
51°
24
Hist. Avg.
72°
54°
25
Hist. Avg.
72°
54°
26
Hist. Avg.
71°
54°
27
Hist. Avg.
71°
53°
28
Hist. Avg.
70°
53°
29
Hist. Avg.
70°
52°
30
Hist. Avg.
70°
52°
1
Hist. Avg.
69°
52°
2
Hist. Avg.
69°
51°
3
Hist. Avg.
69°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Haven
West Haven's September 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 51° and 65°. The average high for September is 77° 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.
