S
M
T
W
T
F
S
30
84°
64°
31
83°
67°
1
86°
68°
2
85°
63°
3
82°
63°
4
81°
62°
5
80°
61°
6
82°
61°
7
82°
63°
8
83°
64°
9
81°
66°
10
85°
64°
11
85°
64°
12
84°
65°
13
85°
66°
14
85°
66°
15
84°
65°
16
84°
64°
17
85°
65°
18
83°
63°
19
82°
62°
20
81°
61°
21
82°
62°
22
82°
58°
23
81°
60°
24
Hist. Avg.
80°
56°
25
Hist. Avg.
80°
56°
26
Hist. Avg.
79°
55°
27
Hist. Avg.
79°
55°
28
Hist. Avg.
79°
55°
29
Hist. Avg.
78°
54°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
53°
2
Hist. Avg.
78°
53°
3
Hist. Avg.
77°
52°
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 80° to 86°, with overnight lows between 58° and 68°. The average high for September is 83° with an average low of 63°. 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.
