S
M
T
W
T
F
S
27
75°
62°
28
74°
62°
29
73°
61°
30
73°
58°
1
70°
55°
2
65°
60°
3
70°
59°
4
72°
61°
5
72°
60°
6
71°
58°
7
69°
60°
8
70°
58°
9
68°
58°
10
69°
56°
11
69°
48°
12
56°
44°
13
55°
45°
14
55°
46°
15
56°
45°
16
55°
44°
17
54°
42°
18
52°
42°
19
52°
44°
20
53°
46°
21
54°
46°
22
53°
50°
23
68°
45°
24
67°
45°
25
57°
41°
26
56°
39°
27
49°
36°
28
48°
42°
29
49°
48°
30
50°
39°
31
54°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Chicago
Chicago's October 2026 forecast shows daily high temperatures ranging from 48° to 75°, with overnight lows between 36° and 62°. The average high for October is 62° with an average low of 50°. 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 Chicago. See also: November | December | January.
