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

As of 4:13 AM CST on January 28, 2026, all 32 cities in St. Clair County, IL in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in St. Clair County, IL is expected to be 3 in New Athens between 12:00 PM - 1:00 PM CST today.

Search Cities in St. Clair County, IL

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in St. Clair County, IL as of 4:13 AM CST, January 28, 2026

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

4:13 AM CST, January 28, 2026