As of 6:01 PM EDT on April 30, 2026, all 17 cities in Charleston County, SC in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Hollywood, SC with a reading of 1.2.
Over the next 24 hours, the highest UV Index reading in Charleston County, SC is expected to be 4.7 in Seabrook Island between 3:00 PM - 4:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |