As of 1:24 PM MST on January 18, 2026, all 24 cities in Arapahoe County, CO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Aurora, CO with a reading of 2.
Over the next 24 hours, the highest UV Index reading in Arapahoe County, CO is expected to be 2.1 in Deer Trail between 11:00 AM - 12:00 PM MST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |