As of 12:23 AM EDT on May 13, 2025, all 29 cities in Loudoun County, VA in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Loudoun County, VA is expected to be 0.8 in Waterford between 12:00 PM - 1:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |