S
M
T
W
T
F
S
28
80°
66°
29
83°
68°
30
87°
69°
1
82°
66°
2
83°
64°
3
81°
65°
4
82°
64°
5
79°
66°
6
76°
59°
7
78°
60°
8
78°
62°
9
79°
64°
10
78°
67°
11
81°
67°
12
81°
66°
13
82°
65°
14
80°
66°
15
79°
65°
16
79°
63°
17
80°
64°
18
81°
64°
19
80°
67°
20
80°
61°
21
77°
60°
22
78°
62°
23
79°
64°
24
81°
66°
25
83°
67°
26
83°
67°
27
78°
65°
28
78°
63°
29
79°
64°
30
83°
68°
31
84°
67°
1
81°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Willowbrook
Willowbrook's July 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 59° and 69°. The average high for July is 80° with an average low of 65°. 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 Willowbrook. See also: August | September | October.