S
M
T
W
T
F
S
26
91°
74°
27
93°
74°
28
93°
75°
29
92°
75°
30
94°
74°
31
94°
75°
1
93°
75°
2
94°
76°
3
94°
76°
4
95°
75°
5
96°
76°
6
95°
76°
7
95°
75°
8
94°
75°
9
94°
74°
10
92°
74°
11
93°
75°
12
94°
75°
13
94°
74°
14
93°
75°
15
94°
74°
16
94°
72°
17
94°
69°
18
94°
69°
19
93°
70°
20
90°
67°
21
93°
71°
22
90°
70°
23
89°
69°
24
88°
66°
25
87°
65°
26
87°
65°
27
86°
64°
28
86°
64°
29
87°
65°
30
86°
64°
31
88°
65°
1
89°
64°
2
90°
64°
3
91°
69°
4
91°
69°
5
90°
68°
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 96°, with overnight lows between 64° and 76°. The average high for August is 92° with an average low of 71°. 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.
