Weld County, CO: Current UV Index and Hourly Forecast

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As of 5:53 PM MDT on July 20, 2026, out of 28 cities in Weld County, CO in our database, 14 cities (50%) have a UV Index reading of Moderate, while 14 cities (50%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Fort Lupton, CO with a reading of 3.5.

Over the next 24 hours, the highest UV Index reading in Weld County, CO is expected to be 11.7 in Erie between 1:00 PM - 2:00 PM MDT tomorrow.

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Current UV Index in Cities in Weld County, CO

• Aristocrat Ranchettes - 3.5
• Ault - 1.8
• Briggsdale - 3.4
• Dacono - 2.8
• Eaton - 1.8
• Erie - 2.8
• Evans - 1.8
• Firestone - 0.4
• Fort Lupton - 3.5
• Frederick - 2.8
• Garden City - 1.8
• Gilcrest - 1.8
• Greeley - 1.8
• Grover - 3.4
• Hudson - 3.5
• Johnstown - 0.4
• Keenesburg - 3.3
• Kersey - 3
• La Salle - 1.8
• Lochbuie - 3.5
• Mead - 0.4
• Milliken - 1.8
• Nunn - 2.8
• Pierce - 2.8
• Platteville - 1.8
• Raymer - 3.3
• Severance - 1.8
• Windsor - 0.7