Boulder County, CO: Current UV Index and Hourly Forecast

As of 7:19 PM MDT on July 30, 2025, 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 0.1.

Over the next 24 hours, the highest UV Index reading in Boulder County, CO is expected to be 6.3 in Allenspark between 12:00 PM - 1:00 PM MDT tomorrow.

Search Cities in Boulder County, CO

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Boulder County, CO as of 7:19 PM MDT, July 30, 2025

Current UV Index in Cities in Boulder County, CO

7:19 PM MDT, July 30, 2025