S
M
T
W
T
F
S
30
65°
46°
31
68°
51°
1
73°
48°
2
72°
50°
3
72°
50°
4
73°
49°
5
73°
48°
6
65°
41°
7
62°
48°
8
68°
44°
9
62°
47°
10
66°
40°
11
62°
42°
12
63°
39°
13
60°
38°
14
59°
38°
15
57°
37°
16
59°
35°
17
56°
37°
18
Hist. Avg.
61°
41°
19
Hist. Avg.
61°
41°
20
Hist. Avg.
60°
40°
21
Hist. Avg.
60°
40°
22
Hist. Avg.
60°
40°
23
Hist. Avg.
60°
40°
24
Hist. Avg.
59°
39°
25
Hist. Avg.
59°
39°
26
Hist. Avg.
59°
39°
27
Hist. Avg.
59°
39°
28
Hist. Avg.
58°
38°
29
Hist. Avg.
58°
38°
30
Hist. Avg.
58°
38°
1
Hist. Avg.
57°
38°
2
Hist. Avg.
57°
37°
3
Hist. Avg.
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in The Hamptons
The Hamptons's September 2026 forecast shows daily high temperatures ranging from 56° to 73°, with overnight lows between 35° and 51°. The average high for September is 65° with an average low of 44°. 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 The Hamptons. See also: October | November | December.
