Places / Aspen, Colorado
UV index in Aspen, Colorado
Check another placeLoading 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
About Aspen
Aspen is a mountain town with lifts and trails reaching well above its streets. This forecast point is in town; it is not a summit or ski-slope measurement.
When to check the UV here
Summer hikes and winter snow days both deserve a UV check. Snow can add reflected exposure, while the air temperature gives little guidance about sunburn risk.
Planning your time outside
Pack sunglasses that block UV and cover exposed skin for a long day on snow. If you are heading higher, search the destination and leave room in your plan for shelter.
How to read this forecast
The chart loads hourly model data from currentuvindex.com for 39.1911, -106.8175. Times are local to this forecast point. Open Hour-by-hour numbers for the values, or compare the next few days below the main chart.
The forecast describes UV for the area, not the dose on your skin. Buildings, trees, cloud and reflective surfaces can change your exposure. It does not measure a particular beach chair, trail or street.
What time does UV drop below 3?
Read the descending side of today’s curve, then check that the later hours remain below 3. The time changes with the date and weather. See how to find the afternoon drop instead of using a fixed clock time.
What should I bring?
Plan sun protection when the forecast reaches 3 or higher. Shade, covering, a hat, sunglasses and sunscreen work together. At very high UV, arrange outdoor time around the peak rather than relying on sunscreen alone.
Nearby or similar forecasts
Related guides
Sources and local information
UV forecasts are model estimates and can differ from conditions on the ground. Live data requires JavaScript and a connection to the provider; no typical UV values are substituted if it fails. Page updated October 15, 2026. See how the data works.