S
M
T
W
T
F
S
26
85°
63°
27
84°
67°
28
77°
67°
29
76°
63°
30
70°
57°
1
62°
54°
2
71°
47°
3
75°
44°
4
79°
49°
5
76°
57°
6
77°
56°
7
72°
54°
8
70°
51°
9
76°
61°
10
79°
60°
11
76°
61°
12
80°
54°
13
83°
53°
14
79°
54°
15
85°
54°
16
85°
66°
17
86°
58°
18
88°
69°
19
89°
69°
20
79°
69°
21
82°
69°
22
83°
67°
23
83°
66°
24
79°
67°
25
79°
68°
26
79°
69°
27
86°
71°
28
80°
68°
29
77°
64°
30
80°
63°
31
81°
64°
1
80°
63°
2
81°
63°
3
82°
60°
4
81°
63°
5
84°
65°
6
85°
62°
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 77° to 86°, with overnight lows between 60° and 71°. The average high for May is 81° with an average low of 65°. 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.
