As of 10:33 AM EDT on August 11, 2026, all 9 cities in Sullivan County, TN in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Kingsport, TN with a reading of 2.9.
Over the next 24 hours, the highest UV Index reading in Sullivan County, TN is expected to be 8.1 in Kingsport 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 |