S
M
T
W
T
F
S
26
93°
72°
27
97°
72°
28
84°
66°
29
88°
64°
30
88°
68°
31
72°
63°
1
86°
63°
2
81°
64°
3
84°
61°
4
73°
64°
5
77°
55°
6
81°
52°
7
81°
63°
8
81°
59°
9
81°
63°
10
84°
66°
11
84°
70°
12
86°
66°
13
79°
66°
14
81°
66°
15
81°
66°
16
81°
61°
17
84°
57°
18
81°
63°
19
79°
55°
20
81°
52°
21
82°
63°
22
81°
57°
23
79°
50°
24
81°
52°
25
81°
61°
26
81°
61°
27
82°
55°
28
82°
52°
29
82°
69°
30
84°
70°
31
90°
67°
1
89°
68°
2
86°
67°
3
86°
68°
4
86°
67°
5
85°
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 82° to 90°, with overnight lows between 64° and 70°. The average high for August is 86° 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.
