S
M
T
W
T
F
S
30
75°
57°
31
74°
57°
1
74°
62°
2
75°
65°
3
76°
65°
4
82°
64°
5
82°
63°
6
80°
57°
7
76°
56°
8
75°
56°
9
74°
55°
10
72°
55°
11
73°
56°
12
72°
55°
13
75°
60°
14
77°
61°
15
76°
60°
16
72°
56°
17
71°
57°
18
72°
59°
19
73°
52°
20
72°
54°
21
72°
52°
22
75°
50°
23
69°
50°
24
69°
51°
25
68°
56°
26
70°
50°
27
69°
55°
28
69°
55°
29
67°
47°
30
66°
50°
1
66°
55°
2
72°
52°
3
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Chester
Port Chester's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 47° and 65°. 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 Port Chester. See also: October | November | December.
