The Infectious risk has shown little change over the last 12 weeks, with the most recent week close to the 12-week average..
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 stayed relatively flat over the past 12 weeks in Madison, Illinois.
Last updated: August 24, 2026
Data refreshed weekly