S
M
T
W
T
F
S
27
64°
55°
28
65°
57°
29
67°
60°
30
72°
59°
1
71°
53°
2
62°
49°
3
65°
60°
4
73°
57°
5
58°
45°
6
59°
45°
7
60°
44°
8
59°
45°
9
63°
49°
10
65°
55°
11
64°
57°
12
65°
56°
13
67°
53°
14
67°
42°
15
58°
43°
16
54°
52°
17
57°
43°
18
58°
53°
19
63°
56°
20
66°
54°
21
68°
51°
22
66°
40°
23
64°
38°
24
50°
40°
25
51°
39°
26
52°
42°
27
55°
50°
28
57°
49°
29
61°
50°
30
60°
45°
31
63°
38°
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 50° to 73°, with overnight lows between 38° and 60°. The average high for October is 62° with an average low of 49°. 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.
