S
M
T
W
T
F
S
26
79°
64°
27
78°
61°
28
79°
62°
29
77°
61°
30
77°
63°
31
79°
64°
1
80°
64°
2
84°
66°
3
83°
66°
4
84°
64°
5
78°
62°
6
77°
64°
7
80°
64°
8
79°
63°
9
78°
65°
10
79°
62°
11
76°
59°
12
77°
64°
13
82°
64°
14
79°
58°
15
74°
57°
16
75°
59°
17
75°
63°
18
77°
64°
19
75°
64°
20
77°
63°
21
80°
63°
22
75°
61°
23
74°
62°
24
78°
57°
25
79°
62°
26
83°
55°
27
78°
53°
28
72°
55°
29
70°
53°
30
72°
53°
31
73°
61°
1
76°
62°
2
72°
63°
3
78°
63°
4
80°
55°
5
81°
57°
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 70° to 84°, with overnight lows between 53° and 66°. The average high for August is 78° with an average low of 61°. 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.
