S
M
T
W
T
F
S
26
83°
56°
27
83°
55°
28
84°
57°
29
84°
56°
30
85°
57°
31
85°
57°
1
84°
58°
2
85°
58°
3
84°
57°
4
84°
57°
5
83°
56°
6
83°
56°
7
82°
55°
8
82°
56°
9
83°
56°
10
83°
55°
11
82°
56°
12
79°
55°
13
80°
55°
14
74°
51°
15
76°
53°
16
80°
53°
17
81°
51°
18
77°
51°
19
76°
54°
20
80°
53°
21
81°
54°
22
81°
52°
23
82°
54°
24
82°
52°
25
80°
52°
26
81°
51°
27
80°
51°
28
81°
49°
29
81°
50°
30
80°
49°
31
79°
45°
1
80°
47°
2
81°
49°
3
81°
49°
4
80°
45°
5
78°
48°
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 74° to 85°, with overnight lows between 45° and 58°. The average high for August is 81° with an average low of 53°. 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.
