Williamson County, IL: Current UV Index and Hourly Forecast

As of 12:16 PM CDT on May 12, 2025, all 16 cities in Williamson County, IL in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Hurst, IL with a reading of 7.

Over the next 24 hours, the highest UV Index reading in Williamson County, IL is expected to be 7.4 in Marion between 2:00 PM - 3:00 PM CDT today.

Search Cities in Williamson County, IL

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Williamson County, IL as of 12:16 PM CDT, May 12, 2025

Current UV Index in Cities in Williamson County, IL

12:16 PM CDT, May 12, 2025