As of 10:26 AM EDT on June 21, 2026, all 3 cities in Rockcastle County, KY in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Mount Vernon, KY with a reading of 4.1.
Over the next 24 hours, the highest UV Index reading in Rockcastle County, KY is expected to be 10.5 in Mount Vernon 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 |