As of 5:34 PM EDT on September 17, 2026, out of 19 cities in Hamilton County, TN in our database, 18 cities (95%) have a UV Index reading of Moderate, while 1 city (5%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Chattanooga, TN with a reading of 2.7.
Over the next 24 hours, the highest UV Index reading in Hamilton County, TN is expected to be 7.9 in Chattanooga between 2:00 PM - 3:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |