The Infectious risk has risen noticeably over the past 12 weeks, ending the period at its highest level..
Allergy risk activity has held steady over the past 12 weeks in Knox, Illinois.
Pollution risk activity has been increasing over the past 12 weeks in Knox, Illinois.
Weather risk activity has been increasing over the past 12 weeks in Knox, Illinois.
Last updated: July 6, 2026
Data refreshed weekly