S
M
T
W
T
F
S
28
86°
70°
29
91°
76°
30
91°
75°
1
92°
75°
2
94°
74°
3
93°
73°
4
92°
72°
5
85°
66°
6
82°
64°
7
83°
65°
8
86°
67°
9
85°
68°
10
87°
65°
11
83°
68°
12
85°
66°
13
85°
67°
14
86°
66°
15
93°
68°
16
81°
62°
17
80°
61°
18
80°
63°
19
81°
68°
20
81°
68°
21
87°
67°
22
86°
68°
23
87°
68°
24
87°
67°
25
86°
68°
26
87°
69°
27
88°
69°
28
88°
70°
29
89°
69°
30
88°
68°
31
87°
68°
1
84°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Illiana
Illiana's July 2026 forecast shows daily high temperatures ranging from 80° to 94°, with overnight lows between 61° and 74°. The average high for July is 86° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Illiana. See also: August | September | October.
