Boulder County, CO: Current UV Index and Hourly Forecast

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As of 7:14 PM MDT on July 14, 2026, 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 Boulder, CO with a reading of 0.5.

Over the next 24 hours, the highest UV Index reading in Boulder County, CO is expected to be 12.3 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 - 0.5
• Altona - 0.5
• Bark Ranch - 0.5
• Bonanza Mountain Estates - 0.5
• Boulder - 0.5
• Crisman - 0.5
• Eldora - 0.5
• Eldorado Springs - 0.5
• Gold Hill - 0.5
• Gunbarrel - 0.5
• Hidden Lake - 0.5
• Jamestown - 0.5
• Lafayette - 0.5
• Lazy Acres - 0.5
• Leyner - 0.5
• Longmont - 0.5
• Louisville - 0.5
• Lyons - 0.5
• Mountain Meadows - 0.5
• Nederland - 0.5
• Niwot - 0.5
• Paragon Estates - 0.5
• Pine Brook Hill - 0.5
• Seven Hills - 0.5
• St. Ann Highlands - 0.5
• Sugarloaf - 0.5
• Sunshine - 0.5
• Superior - 0.5
• Tall Timber - 0.5
• Valmont - 0.5
• Ward - 0.5