S
M
T
W
T
F
S
26
65°
44°
27
60°
37°
28
59°
36°
29
55°
38°
30
53°
37°
1
59°
38°
2
65°
41°
3
64°
41°
4
63°
39°
5
56°
38°
6
55°
41°
7
60°
42°
8
63°
41°
9
61°
44°
10
67°
45°
11
61°
47°
12
65°
43°
13
61°
40°
14
61°
40°
15
64°
48°
16
73°
51°
17
74°
54°
18
75°
52°
19
70°
48°
20
69°
51°
21
70°
53°
22
70°
54°
23
75°
56°
24
76°
55°
25
71°
53°
26
75°
52°
27
76°
56°
28
77°
57°
29
77°
58°
30
76°
58°
31
78°
59°
1
79°
60°
2
80°
60°
3
80°
58°
4
75°
55°
5
71°
55°
6
72°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mankato
Mankato's May 2026 forecast shows daily high temperatures ranging from 53° to 80°, with overnight lows between 36° and 60°. The average high for May is 68° with an average low of 49°. 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 Mankato. See also: June | July | August.
