S
M
T
W
T
F
S
26
53°
36°
27
55°
41°
28
55°
32°
29
46°
33°
30
44°
32°
1
47°
32°
2
55°
37°
3
55°
35°
4
56°
37°
5
54°
38°
6
51°
38°
7
53°
36°
8
58°
37°
9
51°
36°
10
52°
37°
11
53°
39°
12
52°
39°
13
53°
36°
14
53°
36°
15
57°
42°
16
61°
41°
17
63°
46°
18
67°
44°
19
57°
40°
20
56°
39°
21
57°
39°
22
58°
43°
23
64°
47°
24
68°
48°
25
63°
47°
26
64°
46°
27
68°
49°
28
70°
50°
29
70°
49°
30
67°
50°
31
68°
52°
1
72°
53°
2
73°
52°
3
72°
50°
4
66°
47°
5
62°
48°
6
66°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sioux
Sioux's May 2026 forecast shows daily high temperatures ranging from 44° to 73°, with overnight lows between 32° and 53°. The average high for May is 59° with an average low of 42°. 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 Sioux. See also: June | July | August.
