S
M
T
W
T
F
S
26
35°
26°
27
51°
19°
28
57°
28°
29
60°
28°
30
66°
33°
1
73°
34°
2
69°
37°
3
76°
36°
4
54°
38°
5
51°
25°
6
74°
23°
7
69°
47°
8
76°
42°
9
66°
45°
10
80°
40°
11
75°
45°
12
77°
38°
13
89°
45°
14
63°
42°
15
64°
38°
16
56°
40°
17
41°
34°
18
53°
30°
19
64°
33°
20
56°
39°
21
59°
33°
22
66°
34°
23
75°
38°
24
80°
50°
25
85°
42°
26
88°
53°
27
84°
53°
28
87°
56°
29
86°
54°
30
64°
48°
31
52°
45°
1
65°
43°
2
67°
44°
3
69°
47°
4
77°
48°
5
75°
45°
6
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sun Prairie
Sun Prairie's May 2026 forecast shows daily high temperatures ranging from 52° to 87°, with overnight lows between 43° and 56°. The average high for May is 73° with an average low of 49°. 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 Sun Prairie. See also: June | July | August.
