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