S
M
T
W
T
F
S
28
83°
56°
29
81°
57°
30
80°
59°
1
82°
65°
2
86°
66°
3
84°
66°
4
87°
65°
5
87°
58°
6
83°
57°
7
81°
59°
8
84°
65°
9
86°
65°
10
87°
67°
11
88°
67°
12
90°
58°
13
87°
56°
14
81°
63°
15
82°
61°
16
85°
65°
17
86°
66°
18
87°
66°
19
88°
65°
20
89°
66°
21
88°
65°
22
88°
66°
23
87°
66°
24
89°
65°
25
88°
65°
26
86°
64°
27
84°
66°
28
86°
64°
29
88°
66°
30
88°
66°
31
87°
65°
1
88°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Naperville
Naperville's July 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 56° and 67°. The average high for July is 86° with an average low of 63°. 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 Naperville. See also: August | September | October.
