As of 2:43 PM MDT on May 17, 2026, out of 478 cities in Colorado in our database, 178 cities (37%) have a UV Index reading of Very High, 130 cities (27%) have a UV Index reading of Moderate, 125 cities (26%) have a UV Index reading of High, while 45 cities (9%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Stonewall Gap, CO with a reading of 9.6.
Over the next 24 hours, the highest UV Index reading in Colorado is expected to be 10.7 in Telluride between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |