Mercer County, IL: Current UV Index and Hourly Forecast

As of 11:38 AM CDT on June 1, 2025, all 15 cities in Mercer County, IL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Viola, IL with a reading of 4.8.

Over the next 24 hours, the highest UV Index reading in Mercer County, IL is expected to be 6.4 in Viola between 1:00 PM - 2:00 PM CDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Mercer County, IL as of 11:38 AM CDT, June 1, 2025

Current UV Index in Cities in Mercer County, IL

11:38 AM CDT, June 1, 2025