Mercer County, IL: Current UV Index and Hourly Forecast

As of 4:24 AM CDT on May 17, 2025, all 15 cities in Mercer 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 Mercer County, IL is expected to be 6.4 in North Henderson 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 4:24 AM CDT, May 17, 2025

Current UV Index in Cities in Mercer County, IL

4:24 AM CDT, May 17, 2025