The Infectious risk has trended steadily upward over the past 12 weeks, reaching a notably higher level in the most recent week compared to prior weeks..
Allergy risk activity has been easing over the past 12 weeks in Williamson, Illinois.
Pollution risk activity has been trending upward over the past 12 weeks in Williamson, Illinois.
Weather risk activity has been climbing over the past 12 weeks in Williamson, Illinois.
Last updated: July 6, 2026
Data refreshed weekly