S
M
T
W
T
F
S
30
80°
58°
31
77°
66°
1
74°
63°
2
73°
63°
3
80°
67°
4
83°
68°
5
79°
62°
6
71°
58°
7
79°
52°
8
79°
56°
9
80°
59°
10
85°
68°
11
77°
58°
12
76°
52°
13
76°
66°
14
74°
64°
15
69°
52°
16
75°
54°
17
79°
63°
18
81°
64°
19
68°
59°
20
67°
62°
21
72°
57°
22
69°
52°
23
69°
50°
24
68°
52°
25
68°
56°
26
63°
56°
27
64°
56°
28
64°
57°
29
69°
57°
30
72°
58°
1
73°
59°
2
72°
57°
3
70°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sachem Head
Sachem Head's September 2026 forecast shows daily high temperatures ranging from 63° to 73°, with overnight lows between 52° and 59°. The average high for September is 68° 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 Sachem Head. See also: October | November | December.
