Weld County, CO: Current UV Index and Hourly Forecast

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As of 11:40 AM MDT on September 17, 2025, all 28 cities in Weld County, CO in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Erie, CO with a reading of 4.9.

Over the next 24 hours, the highest UV Index reading in Weld County, CO is expected to be 6.9 in Greeley between 1:00 PM - 2:00 PM MDT today.

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Current UV Index in Cities in Weld County, CO

• Aristocrat Ranchettes - 4.9
• Ault - 4.8
• Briggsdale - 4.8
• Dacono - 4.9
• Eaton - 4.8
• Erie - 4.9
• Evans - 4.8
• Firestone - 4.8
• Fort Lupton - 4.9
• Frederick - 4.9
• Garden City - 4.8
• Gilcrest - 4.8
• Greeley - 4.8
• Grover - 4.8
• Hudson - 4.9
• Johnstown - 4.8
• Keenesburg - 4.8
• Kersey - 4.8
• La Salle - 4.8
• Lochbuie - 4.9
• Mead - 4.8
• Milliken - 4.8
• Nunn - 4.8
• Pierce - 4.8
• Platteville - 4.8
• Raymer - 4.8
• Severance - 4.8
• Windsor - 4.8