S
M
T
W
T
F
S
27
73°
45°
28
74°
44°
29
78°
48°
30
67°
59°
1
70°
60°
2
65°
48°
3
69°
42°
4
72°
49°
5
69°
43°
6
73°
47°
7
79°
52°
8
72°
47°
9
70°
49°
10
80°
57°
11
77°
48°
12
87°
58°
13
78°
65°
14
65°
58°
15
65°
56°
16
56°
41°
17
56°
36°
18
63°
38°
19
67°
38°
20
69°
37°
21
72°
44°
22
74°
46°
23
72°
48°
24
70°
51°
25
72°
49°
26
66°
46°
27
57°
39°
28
58°
38°
29
55°
37°
30
56°
39°
31
54°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Naperville
Naperville's October 2026 forecast shows daily high temperatures ranging from 54° to 74°, with overnight lows between 37° and 51°. The average high for October is 64° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Naperville. See also: November | December | January.
