UV index in Denver, Colorado
Change place
Popular places
Place search by OpenStreetMap. Your location is only used to look up UV and isn’t stored on our servers.
Loading today’s UV…
- Low 0 to 2
- Moderate 3 to 5
- High 6 to 7
- Very high 8 to 10
- Extreme 11+
Hour-by-hour numbers
| Time | UV index | Level |
|---|
The next few days
Each day’s UV curve and peak, drawn on the same scale so you can compare. The forecast reaches roughly four days ahead.
What to do today
How to read the UV index
The UV index runs from 0 upward. Sun protection is recommended once it reaches 3.
| Level | UV index | What to do |
|---|---|---|
| Low | 0 to 2 | Little risk for most people. Sunglasses on bright days. Take extra care on snow. |
| Moderate | 3 to 5 | Sun protection recommended: hat, sunglasses and sunscreen. Seek shade around midday. |
| High | 6 to 7 | Protection needed. Cut back on midday sun, cover up and use SPF 30+ sunscreen. |
| Very high | 8 to 10 | Extra protection needed. Unprotected skin can burn quickly. Avoid the midday sun. |
| Extreme | 11+ | Take every precaution. Unprotected skin can burn in minutes. |
Guides
- What Is the UV Index? A Plain-English Guide to the Scale
The 0 to 11+ scale explained: what each level means, why 3 is the number to remember, and what changes the reading.
- What to Wear Hiking for Sun Protection: A Practical Guide
Clothing, hats, sunglasses and sunscreen for the trail, what UPF means, and the spots hikers forget.
- UV at Altitude, on Snow and Under Clouds: Why You Burn Faster
Why the sun burns faster on a mountain, how snow and water reflect UV, and what clouds really do.
- When Is UV Strongest During the Day? Best Times to Hike
UV peaks near midday, not at the hottest hour. How to read the daily curve and time your hike around it.