S
M
T
W
T
F
S
26
68°
39°
27
70°
50°
28
63°
50°
29
52°
36°
30
54°
32°
1
48°
34°
2
57°
30°
3
70°
45°
4
81°
41°
5
57°
41°
6
54°
30°
7
63°
32°
8
70°
32°
9
72°
39°
10
63°
32°
11
63°
37°
12
73°
39°
13
64°
39°
14
72°
34°
15
81°
52°
16
82°
59°
17
84°
63°
18
81°
64°
19
75°
52°
20
64°
45°
21
59°
41°
22
70°
46°
23
75°
52°
24
80°
55°
25
87°
58°
26
86°
58°
27
87°
55°
28
81°
54°
29
76°
52°
30
74°
51°
31
73°
52°
1
75°
55°
2
73°
53°
3
75°
55°
4
76°
55°
5
77°
56°
6
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Beloit
South Beloit's May 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 51° and 58°. The average high for May is 78° with an average low of 54°. 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 South Beloit. See also: June | July | August.
