S
M
T
W
T
F
S
26
63°
42°
27
59°
43°
28
56°
37°
29
61°
33°
30
56°
37°
1
56°
32°
2
70°
27°
3
74°
43°
4
73°
43°
5
57°
37°
6
60°
29°
7
70°
36°
8
81°
41°
9
72°
42°
10
75°
34°
11
87°
36°
12
80°
53°
13
80°
42°
14
85°
51°
15
95°
51°
16
85°
48°
17
86°
56°
18
57°
50°
19
58°
40°
20
59°
35°
21
69°
49°
22
73°
50°
23
76°
45°
24
86°
50°
25
95°
62°
26
93°
65°
27
92°
61°
28
90°
64°
29
81°
69°
30
77°
64°
31
80°
61°
1
85°
60°
2
83°
59°
3
83°
63°
4
78°
62°
5
84°
60°
6
83°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Sioux Township
Big Sioux Township's May 2026 forecast shows daily high temperatures ranging from 77° to 85°, with overnight lows between 59° and 64°. The average high for May is 82° with an average low of 61°. 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 Big Sioux Township. See also: June | July | August.
