Jefferson County, KY: Current UV Index and Hourly Forecast

As of 4:52 PM EDT on September 16, 2025, all 83 cities in Jefferson County, KY in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Jeffersontown, KY with a reading of 3.8.

Over the next 24 hours, the highest UV Index reading in Jefferson County, KY is expected to be 6.7 in Louisville between 2:00 PM - 3:00 PM EDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Jefferson County, KY as of 4:52 PM EDT, September 16, 2025

Current UV Index in Cities in Jefferson County, KY

4:52 PM EDT, September 16, 2025