Loudoun County, VA: Current UV Index and Hourly Forecast

• USA →
• Virginia →
• Loudoun County

As of 4:17 PM EDT on June 18, 2026, out of 29 cities in Loudoun County, VA in our database, 28 cities (97%) have a UV Index reading of High, while 1 city (3%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Purcellville, VA with a reading of 5.6.

Over the next 24 hours, the highest UV Index reading in Loudoun County, VA is expected to be 9.7 in Purcellville between 1:00 PM - 2:00 PM EDT tomorrow.

Search Cities in Loudoun County, VA

Current UV Index in Cities in Loudoun County, VA

• Aldie - 5.6
• Arcola - 5.5
• Ashburn - 5.5
• Belmont - 5.5
• Brambleton - 5.5
• Broadlands - 5.5
• Cascades - 5.5
• Countryside - 5.5
• Dulles Town Center - 5.5
• Goose Creek Village - 5.5
• Hamilton - 5.6
• Hillsboro - 5.6
• Kincora - 5.5
• Lansdowne - 5.5
• Leesburg - 5.5
• Loudoun Valley Estates - 5.5
• Lovettsville - 5.6
• Lowes Island - 5.1
• Middleburg - 5.6
• Oak Grove - 5.5
• One Loudoun - 5.5
• Purcellville - 5.6
• Round Hill - 5.6
• South Riding - 5.5
• Sterling - 5.5
• Stone Ridge - 5.5
• Sugarland Run - 5.5
• University Center - 5.5
• Waterford - 5.6