S
M
T
W
T
F
S
30
69°
54°
31
72°
54°
1
73°
53°
2
73°
50°
3
70°
51°
4
71°
53°
5
70°
48°
6
71°
51°
7
69°
50°
8
71°
51°
9
68°
50°
10
66°
49°
11
66°
45°
12
65°
46°
13
65°
46°
14
66°
50°
15
66°
50°
16
68°
49°
17
67°
50°
18
68°
46°
19
69°
44°
20
64°
49°
21
64°
47°
22
65°
44°
23
64°
44°
24
63°
47°
25
64°
49°
26
66°
48°
27
67°
44°
28
65°
42°
29
63°
42°
30
61°
43°
1
62°
41°
2
61°
43°
3
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Old Windsor
Old Windsor's September 2026 forecast shows daily high temperatures ranging from 61° to 73°, with overnight lows between 41° and 54°. The average high for September is 67° 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 Old Windsor. See also: October | November | December.
