S
M
T
W
T
F
S
27
64°
53°
28
62°
50°
29
62°
53°
30
63°
50°
1
61°
52°
2
65°
59°
3
64°
58°
4
64°
56°
5
61°
53°
6
60°
49°
7
60°
52°
8
67°
50°
9
58°
47°
10
63°
56°
11
68°
56°
12
64°
55°
13
67°
56°
14
68°
55°
15
67°
56°
16
59°
44°
17
59°
50°
18
61°
52°
19
65°
53°
20
62°
43°
21
61°
49°
22
60°
51°
23
53°
53°
24
63°
43°
25
63°
38°
26
51°
44°
27
51°
48°
28
52°
49°
29
59°
50°
30
61°
52°
31
64°
52°
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 51° to 68°, with overnight lows between 38° and 59°. The average high for October is 61° with an average low of 51°. 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.
