As of 8:59 AM MDT on April 27, 2026, all 478 cities in Colorado in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Walsh, CO with a reading of 1.1.
Over the next 24 hours, the highest UV Index reading in Colorado is expected to be 10.2 in Silverton between 1:00 PM - 2:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |