S
M
T
W
T
F
S
28
81°
62°
29
92°
76°
30
N/A
1
95°
77°
2
95°
75°
3
88°
73°
4
86°
68°
5
80°
64°
6
83°
66°
7
82°
66°
8
83°
67°
9
84°
66°
10
84°
65°
11
85°
65°
12
84°
66°
13
83°
63°
14
78°
60°
15
78°
61°
16
81°
65°
17
83°
67°
18
85°
65°
19
79°
63°
20
80°
66°
21
84°
67°
22
86°
68°
23
86°
69°
24
87°
68°
25
87°
69°
26
86°
68°
27
86°
68°
28
87°
69°
29
86°
68°
30
83°
65°
31
79°
62°
1
80°
66°
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 78° to 95°, with overnight lows between 60° and 77°. The average high for July is 84° 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 Oak Brook. See also: August | September | October.
