Low Covid-19 risk in LaSalle, Illinois.
Low Flu risk in LaSalle, Illinois.
Low Rsv risk in LaSalle, Illinois.
Low Infectious risk in LaSalle, Illinois.
Very high Allergy risk in LaSalle, Illinois.
Low Pollution risk in LaSalle, Illinois.
Low Weather risk in LaSalle, Illinois.
Last updated: April 20, 2026
Data refreshed weekly