S
M
T
W
T
F
S
28
81°
62°
29
92°
76°
30
94°
79°
1
95°
80°
2
95°
71°
3
88°
70°
4
83°
67°
5
76°
66°
6
80°
67°
7
85°
64°
8
89°
68°
9
87°
72°
10
81°
67°
11
82°
66°
12
87°
67°
13
93°
69°
14
96°
74°
15
96°
76°
16
95°
73°
17
87°
73°
18
87°
72°
19
86°
69°
20
85°
66°
21
79°
63°
22
77°
61°
23
76°
59°
24
81°
65°
25
82°
65°
26
84°
63°
27
83°
64°
28
84°
64°
29
78°
61°
30
76°
61°
31
79°
66°
1
83°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Oak Brook
Oak Brook's July 2026 forecast shows daily high temperatures ranging from 76° to 96°, with overnight lows between 59° and 76°. The average high for July is 84° with an average low of 66°. 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 Oak Brook. See also: August | September | October.
