S
M
T
W
T
F
S
30
83°
62°
31
83°
67°
1
87°
63°
2
88°
61°
3
82°
62°
4
83°
63°
5
82°
65°
6
87°
66°
7
87°
67°
8
86°
66°
9
86°
66°
10
85°
65°
11
86°
65°
12
85°
66°
13
85°
64°
14
86°
63°
15
82°
63°
16
79°
61°
17
80°
58°
18
79°
58°
19
81°
59°
20
82°
63°
21
83°
62°
22
78°
58°
23
82°
61°
24
81°
62°
25
82°
56°
26
82°
60°
27
80°
60°
28
82°
60°
29
81°
60°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
54°
2
Hist. Avg.
78°
53°
3
Hist. Avg.
77°
53°
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 78° to 88°, with overnight lows between 56° and 67°. The average high for September is 83° with an average low of 62°. 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.
