As of 3:11 PM EDT on May 22, 2026, out of 10 cities in Mercer County, OH in our database, 8 cities (80%) have a UV Index reading of Low, while 2 cities (20%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Rockford, OH with a reading of 3.4.
Over the next 24 hours, the highest UV Index reading in Mercer County, OH is expected to be 6.4 in Burkettsville 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 |