McHenry County, IL: Current UV Index and Hourly Forecast

As of 7:38 AM CDT on June 7, 2025, all 40 cities in McHenry County, IL in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Crystal Lake, IL with a reading of 0.5.

Over the next 24 hours, the highest UV Index reading in McHenry County, IL is expected to be 7.4 in Harvard between 1:00 PM - 2:00 PM CDT today.

Search Cities in McHenry County, IL

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in McHenry County, IL as of 7:38 AM CDT, June 7, 2025

Current UV Index in Cities in McHenry County, IL

7:38 AM CDT, June 7, 2025