S
M
T
W
T
F
S
26
90°
72°
27
90°
71°
28
87°
70°
29
85°
71°
30
86°
68°
31
85°
66°
1
84°
66°
2
85°
69°
3
83°
71°
4
84°
68°
5
85°
66°
6
85°
66°
7
88°
71°
8
85°
70°
9
85°
71°
10
89°
68°
11
85°
65°
12
85°
68°
13
86°
69°
14
89°
70°
15
90°
69°
16
90°
70°
17
89°
70°
18
90°
69°
19
89°
63°
20
86°
63°
21
83°
64°
22
83°
63°
23
84°
62°
24
83°
62°
25
83°
63°
26
84°
64°
27
84°
63°
28
85°
66°
29
86°
63°
30
83°
62°
31
83°
67°
1
87°
63°
2
88°
61°
3
82°
62°
4
83°
63°
5
82°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Windsor
Windsor's August 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 61° and 72°. The average high for August is 86° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Windsor. See also: September | October | November.