S
M
T
W
T
F
S
26
83°
58°
27
83°
60°
28
81°
59°
29
77°
59°
30
75°
58°
1
82°
60°
2
78°
59°
3
77°
60°
4
76°
60°
5
77°
59°
6
80°
61°
7
82°
61°
8
83°
62°
9
81°
62°
10
84°
61°
11
85°
62°
12
85°
63°
13
84°
63°
14
85°
64°
15
85°
62°
16
82°
59°
17
83°
60°
18
87°
63°
19
87°
58°
20
82°
59°
21
83°
60°
22
85°
62°
23
88°
63°
24
89°
65°
25
89°
66°
26
88°
66°
27
90°
65°
28
90°
66°
29
89°
66°
30
90°
67°
31
91°
67°
1
91°
66°
2
90°
64°
3
91°
68°
4
92°
68°
5
92°
69°
6
91°
65°
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 75° to 92°, with overnight lows between 58° and 69°. The average high for May is 85° with an average low of 63°. 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.
