S
M
T
W
T
F
S
30
80°
52°
31
N/A
1
77°
65°
2
73°
66°
3
79°
67°
4
82°
60°
5
75°
57°
6
76°
55°
7
77°
60°
8
75°
58°
9
76°
62°
10
81°
61°
11
79°
58°
12
72°
54°
13
72°
54°
14
76°
55°
15
70°
54°
16
70°
58°
17
73°
53°
18
68°
50°
19
68°
50°
20
69°
54°
21
72°
57°
22
75°
58°
23
76°
57°
24
76°
55°
25
74°
55°
26
73°
54°
27
74°
55°
28
74°
55°
29
73°
52°
30
66°
48°
1
64°
48°
2
66°
52°
3
71°
53°
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 64° to 82°, with overnight lows between 48° and 67°. The average high for September is 73° with an average low of 56°. 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.
