As of 1:48 AM CDT on May 13, 2025, all 8 cities in Grundy County, TN in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Grundy County, TN is expected to be 9 in Altamont between 12:00 PM - 1:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |