S
M
T
W
T
F
S
31
83°
61°
1
87°
57°
2
84°
54°
3
82°
58°
4
87°
64°
5
86°
66°
6
87°
65°
7
89°
68°
8
85°
66°
9
84°
65°
10
84°
64°
11
83°
63°
12
82°
61°
13
84°
61°
14
83°
62°
15
78°
58°
16
76°
58°
17
76°
59°
18
78°
62°
19
78°
63°
20
79°
64°
21
80°
64°
22
82°
66°
23
80°
63°
24
83°
66°
25
83°
66°
26
85°
67°
27
83°
66°
28
81°
62°
29
81°
63°
30
82°
62°
1
81°
64°
2
81°
67°
3
82°
67°
4
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Illiopolis
Illiopolis's June 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 54° and 68°. The average high for June is 82° 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 June weather will actually feel in Illiopolis. See also: July | August | September.
