Grundy County, IL: Current UV Index and Hourly Forecast

As of 4:01 AM CDT on October 10, 2025, all 11 cities in Grundy 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 Grundy County, IL is expected to be 2.6 in Coal City between 11:00 AM - 12:00 PM CDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Grundy County, IL as of 4:01 AM CDT, October 10, 2025

Current UV Index in Cities in Grundy County, IL

4:01 AM CDT, October 10, 2025