S
M
T
W
T
F
S
26
53°
37°
27
62°
40°
28
56°
35°
29
60°
33°
30
55°
35°
1
68°
30°
2
73°
31°
3
82°
38°
4
85°
35°
5
52°
38°
6
50°
35°
7
77°
35°
8
76°
44°
9
85°
42°
10
69°
48°
11
85°
42°
12
82°
49°
13
83°
43°
14
90°
56°
15
92°
54°
16
89°
54°
17
86°
49°
18
63°
37°
19
67°
45°
20
62°
44°
21
70°
49°
22
80°
55°
23
84°
53°
24
85°
55°
25
81°
56°
26
88°
58°
27
85°
58°
28
88°
59°
29
80°
52°
30
85°
59°
31
84°
58°
1
82°
58°
2
79°
56°
3
75°
51°
4
77°
58°
5
83°
60°
6
86°
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 62° to 89°, with overnight lows between 37° and 60°. The average high for May is 80° 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.
