Six Flags Great America, IL

Weather Forecast Legend
Low risk of rain/snow.
Medium risk of rain/snow.
High risk of rain/snow.
% Forecast risk of rain/snow.
September 2015 Summary
Avg High Temps 65 to 85 °F
Avg Low Temps 45 to 65 °F
Rain Frequency 4 to 6 days
S M T W T F S
1
62%
2
56%
3
69%
4
44%
5
64%
6
63%
7
67%
8
77%
9
45%
10
71%
11
61%
12
38%
13
33%
14
31%
15
12%
16
31%
17
53%
18
52%
19
64%
20
08%
21
19%
22
46%
23
72%
24
72%
25
76%
26
69%
27
76%
28
80%
29
46%
30
38%
Want more? Check out the detailed forecast.