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