S
M
T
W
T
F
S
30
80°
52°
31
76°
66°
1
77°
66°
2
73°
65°
3
83°
70°
4
84°
63°
5
79°
59°
6
72°
52°
7
79°
47°
8
80°
52°
9
79°
55°
10
86°
66°
11
77°
53°
12
76°
48°
13
76°
63°
14
75°
51°
15
68°
48°
16
74°
47°
17
79°
60°
18
81°
58°
19
68°
55°
20
71°
62°
21
68°
57°
22
65°
53°
23
64°
57°
24
65°
52°
25
65°
57°
26
66°
53°
27
67°
49°
28
69°
52°
29
66°
53°
30
67°
53°
1
68°
51°
2
67°
48°
3
65°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westhampton
Westhampton's September 2026 forecast shows daily high temperatures ranging from 64° to 71°, with overnight lows between 48° and 62°. The average high for September is 67° with an average low of 54°. 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 Westhampton. See also: October | November | December.
