Johnson County, IA: Current UV Index and Hourly Forecast

As of 12:03 AM CDT on July 31, 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 7.4 in Iowa City between 2:00 PM - 3:00 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 12:03 AM CDT, July 31, 2025

Current UV Index in Cities in Johnson County, IA

12:03 AM CDT, July 31, 2025