As of 2:27 PM EDT on May 18, 2025, out of 10 cities in Clay County, FL in our database, 8 cities (80%) have a UV Index reading of Very High, while 2 cities (20%) have a UV Index reading of Extreme. The city with the highest UV Index reading right now is Keystone Heights, FL with a reading of 10.6.
Over the next 24 hours, the highest UV Index reading in Clay County, FL is expected to be 10.9 in Fleming Island between 1:00 PM - 2:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |