St. Clair County, IL: Current UV Index and Hourly Forecast

As of 5:42 PM CDT on June 2, 2025, all 32 cities in St. Clair County, IL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is East St. Louis, IL with a reading of 2.7.

Over the next 24 hours, the highest UV Index reading in St. Clair County, IL is expected to be 9.3 in East St. Louis between 1:00 PM - 2:00 PM CDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in St. Clair County, IL as of 5:42 PM CDT, June 2, 2025

Current UV Index in Cities in St. Clair County, IL

5:42 PM CDT, June 2, 2025