S
M
T
W
T
F
S
27
72°
49°
28
73°
50°
29
80°
53°
30
70°
61°
1
72°
61°
2
65°
55°
3
70°
49°
4
74°
52°
5
68°
49°
6
74°
51°
7
79°
58°
8
73°
53°
9
74°
57°
10
81°
63°
11
78°
59°
12
88°
62°
13
79°
66°
14
67°
60°
15
66°
58°
16
58°
44°
17
56°
40°
18
63°
47°
19
66°
52°
20
64°
53°
21
66°
53°
22
67°
54°
23
64°
53°
24
66°
54°
25
65°
52°
26
60°
53°
27
59°
51°
28
56°
49°
29
58°
51°
30
59°
52°
31
53°
49°
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 53° to 67°, with overnight lows between 47° and 54°. The average high for October is 62° with an average low of 52°. 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.
