S
M
T
W
T
F
S
26
56°
41°
27
53°
41°
28
52°
35°
29
60°
38°
30
57°
33°
1
59°
33°
2
68°
43°
3
68°
46°
4
72°
49°
5
63°
42°
6
69°
43°
7
63°
35°
8
63°
42°
9
64°
41°
10
61°
44°
11
58°
35°
12
64°
42°
13
64°
41°
14
65°
41°
15
71°
50°
16
76°
52°
17
77°
54°
18
79°
53°
19
76°
54°
20
76°
55°
21
74°
55°
22
78°
56°
23
77°
57°
24
78°
56°
25
75°
52°
26
79°
56°
27
81°
58°
28
81°
59°
29
80°
59°
30
81°
60°
31
82°
60°
1
83°
61°
2
84°
60°
3
82°
59°
4
80°
59°
5
78°
60°
6
74°
61°
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 52° to 84°, with overnight lows between 33° and 61°. The average high for May is 72° with an average low of 50°. 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.
