Johnson County, IA: Current UV Index and Hourly Forecast

As of 11:44 PM CDT on July 18, 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 9 in Frytown between 2:00 PM - 3:00 PM CDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Johnson County, IA as of 11:44 PM CDT, July 18, 2025

Current UV Index in Cities in Johnson County, IA

11:44 PM CDT, July 18, 2025