Colorado UV Index by City
Colorado’s cities stretch from Branson at 37.0°N up to Julesburg at 41.0°N — the latitude band that sets how high the midday sun climbs and how fast unprotected skin burns. Each city page below leads with today’s UV index and burn-time verdict on the EPA five-band scale.
Cities in Colorado
| City | Clear-sky peak UV (est.) | Population |
|---|---|---|
| Denver | 13 in June | 2,714,768 |
| Colorado Springs | 13 in June | 643,336 |
| Aurora | 13 in June | 394,432 |
| Fort Collins | 13 in June | 336,364 |
| Lakewood | 13 in June | 156,583 |
| Thornton | 13 in June | 144,187 |
| Grand Junction | 13 in June | 140,777 |
| Greeley | 13 in June | 139,842 |
| Westminster | 13 in June | 115,484 |
| Blue Sky | 12 in June | 19 |
Our dataset lists 477 places in Colorado; the 10 above have a page. For a smaller town, the nearest city above is the closest match.