S
M
T
W
T
F
S
26
87°
69°
27
87°
69°
28
88°
70°
29
87°
70°
30
89°
69°
31
90°
70°
1
90°
70°
2
91°
71°
3
91°
71°
4
92°
70°
5
92°
72°
6
91°
71°
7
92°
70°
8
92°
70°
9
91°
71°
10
90°
70°
11
90°
70°
12
91°
71°
13
91°
71°
14
92°
70°
15
91°
70°
16
90°
69°
17
91°
69°
18
92°
67°
19
92°
68°
20
91°
69°
21
92°
68°
22
88°
69°
23
92°
68°
24
91°
65°
25
89°
63°
26
87°
62°
27
86°
62°
28
86°
61°
29
85°
62°
30
86°
62°
31
87°
63°
1
87°
61°
2
86°
62°
3
90°
64°
4
90°
66°
5
89°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Winona
Winona's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 61° and 72°. The average high for August is 90° with an average low of 68°. 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 Winona. See also: September | October | November.
