As of 3:02 PM EDT on March 22, 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 Bristol, TN with a reading of 5.4.
Over the next 24 hours, the highest UV Index reading in Sullivan County, TN is expected to be 5.4 in Bristol between 3:00 PM - 4:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |