As of 2:58 PM EDT on July 17, 2025, all 8 cities in Washington County, TN in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Johnson City, TN with a reading of 10.
Over the next 24 hours, the highest UV Index reading in Washington County, TN is expected to be 10.1 in Oak Grove 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 |