S
M
T
W
T
F
S
30
77°
65°
31
78°
68°
1
82°
69°
2
82°
67°
3
81°
64°
4
82°
68°
5
81°
66°
6
79°
62°
7
74°
66°
8
73°
67°
9
78°
60°
10
77°
58°
11
73°
66°
12
76°
61°
13
79°
65°
14
76°
63°
15
71°
65°
16
72°
58°
17
72°
62°
18
Hist. Avg.
74°
58°
19
Hist. Avg.
74°
58°
20
Hist. Avg.
74°
58°
21
Hist. Avg.
73°
57°
22
Hist. Avg.
73°
57°
23
Hist. Avg.
72°
56°
24
Hist. Avg.
72°
56°
25
Hist. Avg.
72°
56°
26
Hist. Avg.
71°
55°
27
Hist. Avg.
71°
55°
28
Hist. Avg.
71°
54°
29
Hist. Avg.
70°
54°
30
Hist. Avg.
70°
53°
1
Hist. Avg.
70°
53°
2
Hist. Avg.
69°
53°
3
Hist. Avg.
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Centereach
Centereach's September 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 58° and 69°. The average high for September is 77° with an average low of 64°. 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 Centereach. See also: October | November | December.
