Jefferson County, CO: Current UV Index and Hourly Forecast

As of 11:39 AM MST on January 18, 2025, all 23 cities in Jefferson County, CO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Arvada, CO with a reading of 1.6.

Over the next 24 hours, the highest UV Index reading in Jefferson County, CO is expected to be 1.9 in Arvada between 12:00 PM - 1:00 PM MST today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Jefferson County, CO as of 11:39 AM MST, January 18, 2025

Current UV Index in Cities in Jefferson County, CO

11:39 AM MST, January 18, 2025