As of 10:36 AM EDT on March 14, 2026, all 83 cities in Jefferson County, KY in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Hollyvilla, KY with a reading of 1.1.
Over the next 24 hours, the highest UV Index reading in Jefferson County, KY is expected to be 4.6 in Louisville between 2:00 PM - 3:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |