S
M
T
W
T
F
S
30
89°
68°
31
89°
69°
1
90°
67°
2
85°
66°
3
85°
65°
4
86°
68°
5
88°
67°
6
87°
67°
7
84°
64°
8
84°
63°
9
85°
64°
10
87°
63°
11
87°
63°
12
86°
64°
13
85°
62°
14
83°
61°
15
84°
62°
16
84°
62°
17
85°
61°
18
85°
65°
19
85°
64°
20
Hist. Avg.
86°
63°
21
Hist. Avg.
85°
63°
22
Hist. Avg.
85°
63°
23
Hist. Avg.
85°
62°
24
Hist. Avg.
85°
62°
25
Hist. Avg.
84°
62°
26
Hist. Avg.
84°
61°
27
Hist. Avg.
84°
61°
28
Hist. Avg.
84°
60°
29
Hist. Avg.
83°
60°
30
Hist. Avg.
83°
60°
1
Hist. Avg.
83°
59°
2
Hist. Avg.
83°
59°
3
Hist. Avg.
82°
58°
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 83° to 90°, with overnight lows between 61° and 69°. The average high for September is 86° with an average low of 65°. 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.
