The Infectious risk has stayed within a narrow range over the past 12 weeks, with high levels persisting through the latest week..
Allergy risk activity has remained stable over the past 12 weeks in Boone, Illinois.
No Pollution activity has been reported over the past 12 weeks in Boone, Illinois.
Weather risk activity has been decreasing over the past 12 weeks in Boone, Illinois.
Last updated: August 24, 2026
Data refreshed weekly