As of 10:59 AM EST on February 11, 2026, all 11 cities in Knox County, OH in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Mount Vernon, OH with a reading of 1.7.
Over the next 24 hours, the highest UV Index reading in Knox County, OH is expected to be 3.3 in Centerburg between 12:00 PM - 1:00 PM EST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |