S
M
T
W
T
F
S
30
82°
59°
31
81°
62°
1
80°
58°
2
81°
61°
3
80°
61°
4
79°
60°
5
79°
60°
6
78°
59°
7
78°
59°
8
77°
58°
9
77°
58°
10
76°
57°
11
78°
58°
12
78°
58°
13
78°
59°
14
77°
58°
15
76°
58°
16
77°
57°
17
76°
57°
18
74°
55°
19
73°
47°
20
69°
51°
21
69°
56°
22
70°
47°
23
69°
47°
24
67°
49°
25
69°
53°
26
73°
51°
27
67°
48°
28
67°
47°
29
66°
46°
30
66°
46°
1
67°
52°
2
68°
52°
3
67°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Speonk
Speonk's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 44° and 62°. The average high for September is 74° with an average low of 55°. 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 Speonk. See also: October | November | December.
