The Infectious risk has climbed over the last 12 weeks, ending the period at its highest level..
Allergy risk activity has been trending upward over the past 12 weeks in Stephenson, Illinois.
Pollution risk activity has been climbing over the past 12 weeks in Stephenson, Illinois.
Weather risk activity has been trending upward over the past 12 weeks in Stephenson, Illinois.
Last updated: July 6, 2026
Data refreshed weekly