S
M
T
W
T
F
S
26
56°
41°
27
53°
41°
28
53°
36°
29
61°
33°
30
55°
39°
1
56°
32°
2
71°
30°
3
73°
46°
4
66°
43°
5
54°
32°
6
59°
26°
7
67°
32°
8
78°
49°
9
67°
39°
10
70°
40°
11
83°
59°
12
80°
47°
13
79°
54°
14
87°
58°
15
85°
55°
16
80°
54°
17
82°
58°
18
80°
57°
19
80°
58°
20
79°
56°
21
78°
57°
22
67°
51°
23
67°
51°
24
69°
56°
25
72°
56°
26
70°
55°
27
71°
57°
28
75°
57°
29
78°
58°
30
80°
58°
31
81°
57°
1
79°
58°
2
82°
61°
3
83°
60°
4
80°
55°
5
70°
53°
6
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Yankton
Yankton's May 2026 forecast shows daily high temperatures ranging from 67° to 87°, with overnight lows between 39° and 61°. The average high for May is 77° with an average low of 55°. 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 Yankton. See also: June | July | August.
