S
M
T
W
T
F
S
30
83°
66°
31
83°
66°
1
84°
65°
2
79°
65°
3
81°
64°
4
81°
64°
5
83°
65°
6
83°
65°
7
84°
64°
8
85°
65°
9
81°
64°
10
78°
62°
11
82°
64°
12
83°
64°
13
83°
62°
14
72°
52°
15
71°
55°
16
72°
58°
17
73°
54°
18
70°
53°
19
74°
54°
20
78°
57°
21
79°
58°
22
77°
57°
23
78°
48°
24
71°
47°
25
71°
56°
26
75°
56°
27
75°
46°
28
74°
45°
29
67°
48°
30
69°
52°
1
69°
51°
2
71°
54°
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 67° to 85°, with overnight lows between 45° and 66°. The average high for September is 77° with an average low of 58°. 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.
