S
M
T
W
T
F
S
30
87°
48°
31
78°
51°
1
74°
53°
2
76°
60°
3
71°
58°
4
78°
53°
5
81°
48°
6
84°
48°
7
91°
48°
8
98°
55°
9
98°
61°
10
99°
64°
11
81°
56°
12
88°
50°
13
84°
49°
14
87°
55°
15
85°
52°
16
78°
55°
17
79°
51°
18
84°
49°
19
85°
51°
20
80°
52°
21
81°
51°
22
85°
50°
23
82°
52°
24
79°
51°
25
80°
50°
26
82°
50°
27
85°
51°
28
82°
47°
29
78°
48°
30
80°
47°
1
83°
51°
2
78°
49°
3
80°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Windsor
Windsor's September 2026 forecast shows daily high temperatures ranging from 78° to 85°, with overnight lows between 47° and 55°. The average high for September is 81° with an average low of 50°. 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.
