S
M
T
W
T
F
S
26
55°
40°
27
52°
41°
28
54°
33°
29
57°
33°
30
55°
35°
1
55°
31°
2
68°
30°
3
72°
49°
4
64°
38°
5
54°
33°
6
56°
25°
7
65°
33°
8
77°
38°
9
64°
39°
10
68°
33°
11
79°
36°
12
75°
51°
13
78°
40°
14
81°
51°
15
89°
44°
16
84°
44°
17
78°
52°
18
55°
47°
19
56°
34°
20
62°
44°
21
65°
49°
22
59°
48°
23
70°
54°
24
83°
57°
25
85°
58°
26
83°
61°
27
81°
61°
28
82°
63°
29
83°
63°
30
82°
62°
31
81°
58°
1
84°
57°
2
72°
60°
3
73°
58°
4
75°
61°
5
79°
61°
6
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in East Sioux Falls
East Sioux Falls's May 2026 forecast shows daily high temperatures ranging from 56° to 85°, with overnight lows between 34° and 63°. The average high for May is 75° with an average low of 56°. 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 East Sioux Falls. See also: June | July | August.
