S
M
T
W
T
F
S
26
85°
65°
27
83°
67°
28
86°
68°
29
86°
68°
30
85°
67°
31
86°
68°
1
87°
67°
2
85°
68°
3
86°
67°
4
84°
66°
5
85°
68°
6
87°
67°
7
81°
62°
8
78°
61°
9
80°
63°
10
81°
67°
11
86°
68°
12
85°
68°
13
87°
67°
14
86°
67°
15
85°
66°
16
83°
66°
17
80°
66°
18
84°
66°
19
84°
64°
20
85°
66°
21
84°
62°
22
81°
57°
23
76°
56°
24
76°
56°
25
77°
57°
26
78°
57°
27
81°
59°
28
80°
64°
29
79°
63°
30
77°
64°
31
79°
62°
1
82°
62°
2
82°
55°
3
74°
56°
4
74°
62°
5
73°
61°
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 73° to 87°, with overnight lows between 55° and 68°. The average high for August is 82° 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.
