S
M
T
W
T
F
S
30
70°
50°
31
70°
50°
1
72°
56°
2
71°
58°
3
75°
58°
4
80°
57°
5
80°
55°
6
74°
48°
7
69°
48°
8
71°
51°
9
73°
47°
10
70°
48°
11
70°
48°
12
71°
47°
13
72°
53°
14
76°
53°
15
68°
52°
16
66°
50°
17
67°
52°
18
66°
50°
19
71°
44°
20
66°
47°
21
69°
43°
22
68°
42°
23
65°
42°
24
65°
43°
25
66°
48°
26
68°
41°
27
64°
49°
28
68°
46°
29
67°
39°
30
62°
44°
1
64°
47°
2
70°
45°
3
66°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Windsor
West Windsor's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 38° and 58°. The average high for September is 69° with an average low of 48°. 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 West Windsor. See also: October | November | December.
