The Infectious risk has shown little change over the past 12 weeks, with high levels persisting through the latest week..
Allergy risk activity has stayed relatively flat over the past 12 weeks in Stephenson, Illinois.
No Pollution activity has been reported over the past 12 weeks in Stephenson, Illinois.
Weather risk activity has been decreasing over the past 12 weeks in Stephenson, Illinois.
Last updated: August 24, 2026
Data refreshed weekly