S
M
T
W
T
F
S
30
74°
59°
31
73°
57°
1
73°
57°
2
72°
54°
3
70°
53°
4
67°
56°
5
64°
49°
6
64°
55°
7
65°
55°
8
68°
54°
9
71°
56°
10
63°
52°
11
61°
55°
12
63°
54°
13
62°
55°
14
69°
54°
15
70°
50°
16
62°
47°
17
61°
52°
18
64°
49°
19
68°
48°
20
Hist. Avg.
63°
48°
21
Hist. Avg.
63°
48°
22
Hist. Avg.
63°
48°
23
Hist. Avg.
62°
48°
24
Hist. Avg.
62°
48°
25
Hist. Avg.
62°
47°
26
Hist. Avg.
62°
47°
27
Hist. Avg.
61°
47°
28
Hist. Avg.
61°
47°
29
Hist. Avg.
61°
46°
30
Hist. Avg.
60°
46°
1
Hist. Avg.
60°
46°
2
Hist. Avg.
60°
46°
3
Hist. Avg.
60°
46°
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 61° to 74°, with overnight lows between 47° and 59°. The average high for September is 67° with an average low of 53°. 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.
