As of 3:20 PM MDT on September 18, 2025, out of 8 cities in Larimer County, CO in our database, 6 cities (75%) have a UV Index reading of Moderate, while 2 cities (25%) have a UV Index reading of High. The city with the highest UV Index reading right now is Estes Park, CO with a reading of 5.7.
Over the next 24 hours, the highest UV Index reading in Larimer County, CO is expected to be 7.5 in Estes Park 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 |