S
M
T
W
T
F
S
27
76°
45°
28
78°
46°
29
82°
47°
30
68°
61°
1
84°
61°
2
70°
46°
3
71°
45°
4
77°
46°
5
71°
44°
6
75°
44°
7
80°
49°
8
70°
42°
9
73°
50°
10
83°
58°
11
76°
53°
12
75°
53°
13
67°
47°
14
64°
48°
15
66°
49°
16
62°
44°
17
59°
41°
18
59°
41°
19
63°
40°
20
61°
45°
21
56°
44°
22
58°
41°
23
62°
41°
24
54°
38°
25
53°
36°
26
53°
37°
27
54°
36°
28
60°
44°
29
63°
45°
30
62°
45°
31
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Grant Park
Grant Park's October 2026 forecast shows daily high temperatures ranging from 53° to 83°, with overnight lows between 36° and 58°. The average high for October is 64° with an average low of 44°. 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 Grant Park. See also: November | December | January.
