As of 3:36 PM EDT on October 15, 2026, out of 13 cities in St. Johns County, FL in our database, 11 cities (85%) have a UV Index reading of High, while 2 cities (15%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is St. Augustine Shores, FL with a reading of 5.6.
Over the next 24 hours, the highest UV Index reading in St. Johns County, FL is expected to be 6.7 in St. Augustine 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 |