The Infectious risk has fallen noticeably over the past 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has remained stable over the past 12 weeks in Madison, Illinois.
Pollution risk activity has been climbing over the past 12 weeks in Madison, Illinois.
Weather risk activity has been trending downward over the past 12 weeks in Madison, Illinois.
Last updated: August 31, 2026
Data refreshed weekly