S
M
T
W
T
F
S
26
46°
34°
27
54°
27°
28
62°
25°
29
65°
31°
30
66°
28°
1
63°
33°
2
66°
28°
3
69°
36°
4
58°
44°
5
52°
31°
6
65°
28°
7
70°
28°
8
79°
34°
9
79°
40°
10
78°
42°
11
81°
34°
12
82°
48°
13
75°
42°
14
73°
34°
15
75°
41°
16
71°
39°
17
67°
34°
18
62°
35°
19
65°
26°
20
68°
27°
21
71°
31°
22
73°
34°
23
74°
36°
24
74°
43°
25
61°
40°
26
67°
44°
27
67°
37°
28
68°
38°
29
68°
37°
30
75°
42°
31
77°
43°
1
76°
45°
2
76°
45°
3
76°
44°
4
77°
45°
5
75°
43°
6
76°
39°
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 61° to 77°, with overnight lows between 37° and 45°. The average high for May is 72° with an average low of 42°. 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.
