Boulder County, CO: Current UV Index and Hourly Forecast

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As of 1:28 PM MDT on April 1, 2025, all 31 cities in Boulder County, CO in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Nederland, CO with a reading of 6.4.

Over the next 24 hours, the highest UV Index reading in Boulder County, CO is expected to be 6.4 in Nederland between 1:00 PM - 2:00 PM MDT today.

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Current UV Index in Cities in Boulder County, CO

• Allenspark - 6.1
• Altona - 5.6
• Bark Ranch - 6.4
• Bonanza Mountain Estates - 6.4
• Boulder - 5.5
• Crisman - 5.5
• Eldora - 6.4
• Eldorado Springs - 5.5
• Gold Hill - 6.4
• Gunbarrel - 5.5
• Hidden Lake - 6.4
• Jamestown - 6.4
• Lafayette - 5.6
• Lazy Acres - 5.5
• Leyner - 5.6
• Longmont - 5.6
• Louisville - 5.5
• Lyons - 5.6
• Mountain Meadows - 6.4
• Nederland - 6.4
• Niwot - 5.5
• Paragon Estates - 5.5
• Pine Brook Hill - 5.5
• Seven Hills - 5.5
• St. Ann Highlands - 6.4
• Sugarloaf - 6.4
• Sunshine - 5.5
• Superior - 5.5
• Tall Timber - 5.5
• Valmont - 5.5
• Ward - 6.4