S
M
T
W
T
F
S
28
90°
70°
29
93°
75°
30
95°
77°
1
95°
73°
2
95°
72°
3
93°
70°
4
86°
70°
5
86°
68°
6
86°
64°
7
86°
64°
8
88°
71°
9
82°
68°
10
80°
64°
11
86°
65°
12
86°
67°
13
90°
67°
14
91°
70°
15
92°
66°
16
90°
65°
17
85°
66°
18
84°
63°
19
85°
67°
20
84°
64°
21
81°
63°
22
80°
65°
23
82°
67°
24
82°
65°
25
81°
67°
26
86°
67°
27
86°
66°
28
88°
69°
29
88°
69°
30
87°
68°
31
86°
69°
1
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Illinois City
Illinois City's July 2026 forecast shows daily high temperatures ranging from 80° to 92°, with overnight lows between 63° and 71°. 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 Illinois City. See also: August | September | October.
