Johnson County, IA: Current UV Index and Hourly Forecast

As of 2:53 PM CDT on October 29, 2025, all 12 cities in Johnson County, IA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Iowa City, IA with a reading of 2.8.

Over the next 24 hours, the highest UV Index reading in Johnson County, IA is expected to be 3.1 in Lone Tree between 1:00 PM - 2:00 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 2:53 PM CDT, October 29, 2025

Current UV Index in Cities in Johnson County, IA

2:53 PM CDT, October 29, 2025