S
M
T
W
T
F
S
30
83°
57°
31
79°
55°
1
78°
55°
2
78°
57°
3
79°
57°
4
79°
58°
5
84°
60°
6
77°
61°
7
80°
55°
8
77°
55°
9
77°
56°
10
78°
53°
11
76°
53°
12
75°
54°
13
74°
53°
14
75°
57°
15
76°
58°
16
77°
57°
17
79°
54°
18
80°
52°
19
78°
57°
20
81°
51°
21
73°
50°
22
Hist. Avg.
77°
54°
23
Hist. Avg.
77°
54°
24
Hist. Avg.
77°
54°
25
Hist. Avg.
76°
53°
26
Hist. Avg.
76°
53°
27
Hist. Avg.
75°
53°
28
Hist. Avg.
75°
52°
29
Hist. Avg.
75°
52°
30
Hist. Avg.
74°
52°
1
Hist. Avg.
74°
51°
2
Hist. Avg.
73°
51°
3
Hist. Avg.
73°
51°
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 73° to 84°, with overnight lows between 50° and 61°. The average high for September is 78° with an average low of 55°. 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.
