S
M
T
W
T
F
S
30
80°
67°
31
94°
71°
1
95°
73°
2
96°
72°
3
94°
74°
4
94°
74°
5
88°
72°
6
82°
63°
7
82°
59°
8
86°
59°
9
78°
68°
10
77°
60°
11
82°
57°
12
88°
62°
13
76°
52°
14
72°
48°
15
87°
63°
16
74°
66°
17
85°
68°
18
72°
64°
19
72°
64°
20
69°
60°
21
66°
58°
22
64°
54°
23
66°
56°
24
71°
56°
25
67°
52°
26
69°
54°
27
72°
53°
28
75°
53°
29
76°
59°
30
68°
54°
1
67°
53°
2
67°
52°
3
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chicagoland Speedway
Chicagoland Speedway's September 2026 forecast shows daily high temperatures ranging from 66° to 76°, with overnight lows between 52° and 59°. The average high for September is 70° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Chicagoland Speedway. See also: October | November | December.
