S
M
T
W
T
F
S
26
85°
63°
27
84°
70°
28
80°
68°
29
71°
62°
30
69°
53°
1
66°
51°
2
74°
45°
3
78°
44°
4
82°
54°
5
78°
53°
6
61°
52°
7
68°
53°
8
79°
59°
9
84°
64°
10
80°
58°
11
73°
52°
12
74°
54°
13
82°
62°
14
80°
62°
15
82°
65°
16
84°
65°
17
83°
64°
18
81°
61°
19
80°
64°
20
81°
65°
21
83°
60°
22
77°
58°
23
77°
58°
24
78°
59°
25
76°
59°
26
77°
60°
27
78°
59°
28
79°
60°
29
80°
63°
30
83°
67°
31
82°
68°
1
81°
68°
2
82°
64°
3
81°
67°
4
80°
69°
5
82°
69°
6
82°
68°
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 84°, with overnight lows between 52° and 69°. The average high for May is 79° with an average low of 61°. 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.
