S
M
T
W
T
F
S
27
72°
49°
28
73°
50°
29
76°
61°
30
68°
64°
1
69°
60°
2
65°
55°
3
64°
56°
4
65°
54°
5
64°
51°
6
65°
55°
7
64°
56°
8
64°
55°
9
62°
53°
10
63°
52°
11
62°
53°
12
63°
49°
13
59°
48°
14
56°
45°
15
56°
49°
16
62°
54°
17
65°
54°
18
66°
53°
19
66°
53°
20
63°
52°
21
64°
48°
22
53°
45°
23
56°
50°
24
63°
52°
25
64°
51°
26
63°
48°
27
52°
46°
28
55°
49°
29
62°
52°
30
62°
51°
31
61°
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 52° to 76°, with overnight lows between 45° and 64°. 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.
