As of 10:30 AM MDT on April 28, 2025, all 31 cities in Boulder County, CO in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Nederland, CO with a reading of 3.2.
Over the next 24 hours, the highest UV Index reading in Boulder County, CO is expected to be 7.4 in Nederland between 2:00 PM - 3:00 PM MDT today.
Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
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Color | |||||
Risk | Low | Moderate | High | Very High | Extreme |