S
M
T
W
T
F
S
27
74°
51°
28
72°
49°
29
63°
51°
30
62°
50°
1
63°
52°
2
64°
49°
3
64°
48°
4
68°
49°
5
69°
55°
6
70°
56°
7
64°
47°
8
65°
46°
9
58°
44°
10
57°
45°
11
56°
43°
12
58°
42°
13
55°
44°
14
56°
51°
15
57°
51°
16
59°
52°
17
59°
52°
18
58°
49°
19
66°
45°
20
56°
47°
21
55°
40°
22
56°
46°
23
56°
49°
24
64°
47°
25
62°
40°
26
53°
40°
27
Hist. Avg.
58°
42°
28
Hist. Avg.
58°
42°
29
Hist. Avg.
57°
42°
30
Hist. Avg.
57°
41°
31
Hist. Avg.
56°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Chicago
Chicago's October 2026 forecast shows daily high temperatures ranging from 53° to 74°, with overnight lows between 40° and 56°. The average high for October is 61° with an average low of 48°. 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.
