S
M
T
W
T
F
S
26
97°
76°
27
98°
76°
28
97°
75°
29
98°
75°
30
99°
76°
31
99°
76°
1
98°
75°
2
97°
75°
3
97°
74°
4
96°
75°
5
97°
75°
6
98°
74°
7
98°
74°
8
97°
73°
9
97°
74°
10
96°
74°
11
97°
73°
12
97°
72°
13
95°
73°
14
93°
70°
15
94°
70°
16
97°
71°
17
98°
69°
18
97°
70°
19
96°
69°
20
97°
67°
21
96°
67°
22
91°
65°
23
91°
66°
24
93°
66°
25
97°
65°
26
96°
65°
27
96°
66°
28
97°
70°
29
97°
70°
30
96°
71°
31
96°
70°
1
93°
69°
2
92°
67°
3
94°
65°
4
95°
69°
5
96°
66°
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 91° to 99°, with overnight lows between 65° and 76°. The average high for August is 96° 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.
