As of 4:01 PM EDT on September 20, 2026, out of 11 cities in Knox County, OH in our database, 6 cities (55%) have a UV Index reading of Low, while 5 cities (45%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Apple Valley, OH with a reading of 3.
Over the next 24 hours, the highest UV Index reading in Knox County, OH is expected to be 3 in Apple Valley between 4:00 PM - 5:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |