S
M
T
W
T
F
S
26
88°
70°
27
88°
69°
28
87°
68°
29
87°
68°
30
86°
67°
31
85°
67°
1
85°
66°
2
84°
67°
3
86°
68°
4
85°
67°
5
85°
67°
6
82°
66°
7
81°
64°
8
83°
66°
9
77°
62°
10
80°
67°
11
83°
68°
12
84°
61°
13
85°
59°
14
82°
67°
15
84°
64°
16
87°
58°
17
78°
57°
18
75°
55°
19
75°
55°
20
76°
56°
21
76°
57°
22
77°
57°
23
76°
59°
24
76°
64°
25
81°
60°
26
79°
56°
27
75°
56°
28
75°
57°
29
80°
62°
30
82°
63°
31
83°
54°
1
76°
54°
2
74°
57°
3
73°
62°
4
79°
57°
5
82°
52°
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 88°, with overnight lows between 52° and 70°. The average high for August is 81° with an average low of 62°. 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.
