McHenry County, IL: Current UV Index and Hourly Forecast

As of 2:25 PM CDT on April 1, 2025, all 40 cities in McHenry County, IL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Crystal Lake, IL with a reading of 3.1.

Over the next 24 hours, the highest UV Index reading in McHenry County, IL is expected to be 3.1 in Crystal Lake between 2:00 PM - 3:00 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 2:25 PM CDT, April 1, 2025

Current UV Index in Cities in McHenry County, IL

2:25 PM CDT, April 1, 2025