S
M
T
W
T
F
S
26
89°
62°
27
89°
63°
28
90°
63°
29
92°
64°
30
94°
64°
31
95°
67°
1
95°
68°
2
90°
68°
3
90°
67°
4
92°
68°
5
94°
62°
6
89°
61°
7
88°
62°
8
88°
62°
9
87°
62°
10
88°
62°
11
89°
64°
12
92°
63°
13
92°
66°
14
93°
66°
15
89°
65°
16
88°
65°
17
90°
64°
18
88°
61°
19
87°
63°
20
88°
66°
21
89°
67°
22
89°
64°
23
91°
66°
24
92°
67°
25
93°
67°
26
93°
66°
27
92°
67°
28
91°
66°
29
91°
65°
30
90°
66°
31
89°
63°
1
88°
62°
2
88°
62°
3
86°
60°
4
89°
62°
5
88°
64°
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 86° to 95°, with overnight lows between 60° and 68°. The average high for August is 90° with an average low of 64°. 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.
