S
M
T
W
T
F
S
30
81°
53°
31
80°
47°
1
76°
46°
2
72°
48°
3
72°
47°
4
73°
47°
5
71°
46°
6
71°
45°
7
72°
45°
8
72°
47°
9
71°
51°
10
69°
45°
11
71°
47°
12
74°
47°
13
73°
48°
14
74°
49°
15
69°
45°
16
69°
44°
17
66°
43°
18
68°
47°
19
72°
49°
20
Hist. Avg.
71°
47°
21
Hist. Avg.
71°
47°
22
Hist. Avg.
70°
47°
23
Hist. Avg.
70°
46°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
69°
46°
26
Hist. Avg.
69°
45°
27
Hist. Avg.
68°
45°
28
Hist. Avg.
68°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Windsor
Windsor's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 43° and 53°. The average high for September is 72° with an average low of 47°. 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 Windsor. See also: October | November | December.
