Johnson County, IA: Current UV Index and Hourly Forecast

As of 3:46 AM CDT on October 10, 2025, all 12 cities in Johnson County, IA 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 Johnson County, IA is expected to be 2.5 in Lone Tree between 12:00 PM - 1:00 PM CDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Johnson County, IA as of 3:46 AM CDT, October 10, 2025

Current UV Index in Cities in Johnson County, IA

3:46 AM CDT, October 10, 2025