As of 3:07 PM EDT on September 21, 2025, all 10 cities in Harrison County, OH in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Cadiz, OH with a reading of 4.1.
Over the next 24 hours, the highest UV Index reading in Harrison County, OH is expected to be 4.8 in Cadiz between 12:00 PM - 1:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |