Boulder County, CO: Current UV Index and Hourly Forecast

• USA →
• Colorado →
• Boulder County

As of 6:00 PM MDT on June 30, 2025, all 31 cities in Boulder County, CO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Lafayette, CO with a reading of 1.3.

Over the next 24 hours, the highest UV Index reading in Boulder County, CO is expected to be 11.6 in Nederland between 1:00 PM - 2:00 PM MDT tomorrow.

Search Cities in Boulder County, CO

Current UV Index in Cities in Boulder County, CO

• Allenspark - 1.2
• Altona - 0.6
• Bark Ranch - 0.6
• Bonanza Mountain Estates - 0.6
• Boulder - 0.3
• Crisman - 0.3
• Eldora - 0.6
• Eldorado Springs - 0.3
• Gold Hill - 0.6
• Gunbarrel - 0.3
• Hidden Lake - 0.6
• Jamestown - 0.6
• Lafayette - 1.3
• Lazy Acres - 0.3
• Leyner - 1.3
• Longmont - 1
• Louisville - 0.3
• Lyons - 0.6
• Mountain Meadows - 0.6
• Nederland - 0.6
• Niwot - 0.3
• Paragon Estates - 0.3
• Pine Brook Hill - 0.3
• Seven Hills - 0.3
• St. Ann Highlands - 0.6
• Sugarloaf - 0.6
• Sunshine - 0.3
• Superior - 0.3
• Tall Timber - 0.3
• Valmont - 0.3
• Ward - 0.6