As of 6:33 PM MDT on April 27, 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 Coal Creek, CO with a reading of 0.9.
Over the next 24 hours, the highest UV Index reading in Jefferson County, CO is expected to be 8.6 in Brook Forest between 1:00 PM - 2:00 PM MDT tomorrow.
Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
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Color | |||||
Risk | Low | Moderate | High | Very High | Extreme |