S
M
T
W
T
F
S
26
73°
54°
27
68°
48°
28
58°
40°
29
65°
43°
30
65°
37°
1
60°
39°
2
67°
46°
3
74°
49°
4
72°
46°
5
68°
45°
6
69°
50°
7
67°
41°
8
65°
43°
9
66°
45°
10
66°
50°
11
72°
50°
12
71°
48°
13
66°
47°
14
67°
47°
15
68°
50°
16
74°
56°
17
78°
58°
18
79°
59°
19
78°
59°
20
79°
60°
21
80°
60°
22
79°
59°
23
80°
61°
24
78°
60°
25
78°
57°
26
77°
58°
27
81°
61°
28
81°
62°
29
82°
63°
30
83°
63°
31
83°
62°
1
84°
64°
2
84°
65°
3
85°
65°
4
84°
64°
5
82°
65°
6
78°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hiawatha
Hiawatha's May 2026 forecast shows daily high temperatures ranging from 58° to 85°, with overnight lows between 37° and 65°. The average high for May is 74° 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 Hiawatha. See also: June | July | August.