S
M
T
W
T
F
S
26
70°
34°
27
68°
48°
28
61°
34°
29
55°
37°
30
54°
34°
1
54°
32°
2
64°
30°
3
72°
48°
4
70°
45°
5
54°
39°
6
46°
32°
7
57°
30°
8
72°
32°
9
63°
41°
10
63°
34°
11
64°
32°
12
77°
50°
13
68°
46°
14
77°
39°
15
88°
57°
16
88°
54°
17
72°
68°
18
78°
57°
19
57°
41°
20
60°
41°
21
66°
47°
22
66°
51°
23
76°
53°
24
77°
54°
25
71°
53°
26
77°
56°
27
75°
55°
28
76°
54°
29
77°
51°
30
74°
57°
31
77°
59°
1
78°
58°
2
71°
58°
3
69°
55°
4
70°
56°
5
75°
60°
6
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Winona
Winona's May 2026 forecast shows daily high temperatures ranging from 57° to 88°, with overnight lows between 41° and 68°. The average high for May is 73° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Winona. See also: June | July | August.
