S
M
T
W
T
F
S
26
67°
51°
27
62°
46°
28
53°
41°
29
63°
35°
30
64°
41°
1
66°
40°
2
68°
35°
3
79°
52°
4
85°
49°
5
55°
46°
6
60°
43°
7
78°
43°
8
79°
52°
9
82°
48°
10
74°
51°
11
83°
52°
12
86°
59°
13
83°
48°
14
89°
62°
15
95°
68°
16
94°
64°
17
94°
59°
18
81°
50°
19
63°
44°
20
66°
43°
21
62°
50°
22
74°
58°
23
77°
50°
24
85°
53°
25
90°
64°
26
87°
57°
27
82°
64°
28
77°
63°
29
79°
63°
30
77°
63°
31
80°
61°
1
81°
56°
2
83°
57°
3
82°
55°
4
81°
60°
5
86°
62°
6
90°
64°
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 77° to 90°, with overnight lows between 55° and 64°. The average high for May is 82° 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 Mankato. See also: June | July | August.
