As of 2:21 PM EDT on June 11, 2026, out of 83 cities in Jefferson County, KY in our database, 45 cities (54%) have a UV Index reading of High, while 38 cities (46%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is Hollyvilla, KY with a reading of 9.2.
Over the next 24 hours, the highest UV Index reading in Jefferson County, KY is expected to be 9.2 in Hollyvilla 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 |