Fall Color Calendar 2025 Illinois. Those within the city of chicago can expect to see peak fall foliage by the second week of october, with lincoln park, jackson park and millennium park all cited as great spots. Our fall color season lasts for several weeks, normally starting in northern illinois counties by the third or fourth week in september.
Find out when foliage foliage starts, how long fall foliage lasts, and where to go to. Illinois teems with places that beautifully define the ephemeral nature of fall foliage.