As of 10:42 AM EDT on April 12, 2026, all 10 cities in Mercer County, WV in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Bluefield, WV with a reading of 3.1.
Over the next 24 hours, the highest UV Index reading in Mercer County, WV is expected to be 8.3 in Bluefield between 1:00 PM - 2:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |