S
M
T
W
T
F
S
27
72°
49°
28
73°
52°
29
78°
54°
30
70°
60°
1
71°
56°
2
65°
51°
3
68°
51°
4
71°
50°
5
65°
48°
6
68°
53°
7
71°
55°
8
73°
53°
9
68°
52°
10
70°
54°
11
66°
51°
12
65°
49°
13
60°
48°
14
75°
57°
15
58°
47°
16
66°
51°
17
68°
51°
18
67°
50°
19
60°
45°
20
54°
42°
21
54°
40°
22
55°
43°
23
63°
50°
24
65°
49°
25
64°
48°
26
55°
44°
27
52°
42°
28
59°
46°
29
58°
43°
30
57°
47°
31
61°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in O'Hare
O'Hare's October 2026 forecast shows daily high temperatures ranging from 52° to 75°, with overnight lows between 40° and 57°. The average high for October is 64° 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 O'Hare. See also: November | December | January.
