Arizona, United States · 33.45, -112.07
Today's peak is extreme. Unprotected skin burns in about 15 min at the worst hour. Treat the sun as a hazard: stay indoors or fully covered.
About the UV index in Phoenix
Phoenix sits at 33.5° N, in the northern hemisphere. Today's UV peaks at 11.3: the "extreme" band, which uvlevel.net treats as extreme danger for unprotected skin at the worst hour.
In the Northern Hemisphere at this latitude, UV climbs highest around June and July and eases, without disappearing, around December and January. Even the winter trough here can still cross the moderate band near midday.
Altitude here
Phoenix sits about 335 m above sea level. Thinner air scatters and absorbs less UV on the way down, so uvlevel.net adds roughly 3% 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.
Hour by hour today
| 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 | 0.1 | No danger |
| 07:00 | 0.6 | No danger |
| 08:00 | 2.1 | No danger |
| 09:00 | 4.4 | Caution |
| 10:00 | 7.3 | Danger |
| 11:00 | 9.8 | Serious danger |
| 12:00 | 11.3 | Extreme danger |
| 13:00 | 11.2 | Extreme danger |
| 14:00 | 9.5 | Serious danger |
| 15:00 | 7.6 | Danger |
| 16:00 | 6 | Caution |
| 17:00 | 4.1 | Caution |
| 18:00 | 2.2 | No danger |
| 19:00 | 0.7 | No danger |
| 20:00 | 0.1 | 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 | 12 min |
| II · burns easily | 15 min |
| III · burns sometimes | 21 min |
| IV · rarely burns | 27 min |
| V · brown skin | 35 min |
| VI · deeply pigmented | 59 min |
Next 7 days · daily peak
Frequently asked
Is the UV index dangerous in Phoenix today?
Yes. UV in Phoenix is forecast to reach 3 or higher from 08:24 to 17:33 local time today, peaking at 11.3.
What time is UV highest in Phoenix?
UV is highest in Phoenix at around 12:00 local time today, reaching 11.3.
How long can unprotected skin stay out in Phoenix today?
At today's peak of 11.3, fair skin (Fitzpatrick type II) with no sunscreen burns in about 15 min. Darker skin types take longer. See the table above for every type.
Does the UV index in Phoenix change with the seasons?
In the Northern Hemisphere at this latitude, UV climbs highest around June and July and eases, without disappearing, around December and January. Even the winter trough here can still cross the moderate band near midday.
Nearby cities
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.