Colorado, United States · 39.74, -104.99
Today's peak reaches moderate levels. Unprotected skin starts to redden in about 44 min at the worst hour: shade, sunglasses and SPF 30 are enough.
Denver sits at 39.7° N, in the northern hemisphere. Today's UV peaks at 3.8: the "moderate" band, which uvlevel.net treats as caution for unprotected skin at the worst hour.
Denver sees the widest UV swing of the year of any latitude band: a sharp summer peak around June and July, and a winter trough around December and January where midday UV can sit near zero for weeks at a time.
Denver sits about 1597 m above sea level. Thinner air scatters and absorbs less UV on the way down, so uvlevel.net adds roughly 13% to the modelled index here: uv = max(weather, CAMS) × (1 + 0.08 × metres/1000). That correction is already folded into every number on this page.
| Local time | UV index | Risk |
|---|---|---|
| 00:00 | 0 | No danger |
| 01:00 | 0 | No danger |
| 02:00 | 0 | No danger |
| 03:00 | 0 | No danger |
| 04:00 | 0 | No danger |
| 05:00 | 0 | No danger |
| 06:00 | 0 | No danger |
| 07:00 | 0 | No danger |
| 08:00 | 0.5 | No danger |
| 09:00 | 1.5 | No danger |
| 10:00 | 2.6 | No danger |
| 11:00 | 3.5 | Caution |
| 12:00 | 3.8 | Caution |
| 13:00 | 3.5 | Caution |
| 14:00 | 2.6 | No danger |
| 15:00 | 1.5 | No danger |
| 16:00 | 0.5 | No danger |
| 17:00 | 0 | No danger |
| 18:00 | 0 | No danger |
| 19:00 | 0 | No danger |
| 20:00 | 0 | No danger |
| 21:00 | 0 | No danger |
| 22:00 | 0 | No danger |
| 23:00 | 0 | No danger |
| Skin type | Time to burn |
|---|---|
| I · always burns, never tans | 35 min |
| II · burns easily | 44 min |
| III · burns sometimes | 1 h 01 min |
| IV · rarely burns | 1 h 18 min |
| V · brown skin | 1 h 44 min |
| VI · deeply pigmented | 2 h 54 min |
Yes. UV in Denver is forecast to reach 3 or higher from 10:27 to 13:32 local time today, peaking at 3.8 (estimated from solar position, live forecast data was unavailable).
UV is highest in Denver at around 12:00 local time today, reaching 3.8 (estimated from solar position, live forecast data was unavailable).
At today's peak of 3.8, fair skin (Fitzpatrick type II) with no sunscreen burns in about 44 min (estimated from solar position, live forecast data was unavailable). Darker skin types take longer. See the table above for every type.
Denver sees the widest UV swing of the year of any latitude band: a sharp summer peak around June and July, and a winter trough around December and January where midday UV can sit near zero for weeks at a time.
Forecasts and elevation from Open-Meteo. The second UV opinion contains modified Copernicus Atmosphere Monitoring Service (CAMS) information; neither the European Commission nor ECMWF is responsible for how it is used here.
uvlevel.net gives general sun-safety guidance, not medical advice. Photosensitising medication, skin conditions, infants and a history of skin cancer all call for stricter limits than shown here.