S
M
T
W
T
F
S
26
84°
66°
27
90°
69°
28
83°
62°
29
64°
57°
30
66°
53°
1
68°
50°
2
76°
43°
3
80°
48°
4
82°
54°
5
84°
55°
6
64°
50°
7
75°
45°
8
79°
51°
9
88°
63°
10
72°
57°
11
77°
54°
12
81°
54°
13
87°
59°
14
89°
63°
15
88°
69°
16
86°
70°
17
86°
73°
18
89°
77°
19
79°
58°
20
78°
59°
21
74°
65°
22
83°
66°
23
85°
62°
24
86°
61°
25
88°
62°
26
84°
66°
27
80°
64°
28
82°
64°
29
84°
64°
30
85°
64°
31
79°
61°
1
82°
61°
2
83°
60°
3
81°
60°
4
84°
64°
5
87°
65°
6
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Illinois Bend
Illinois Bend's May 2026 forecast shows daily high temperatures ranging from 79° to 88°, with overnight lows between 60° and 69°. The average high for May is 84° with an average low of 63°. 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 Illinois Bend. See also: June | July | August.
