Places / Phoenix, Arizona
UV index in Phoenix, Arizona
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 Phoenix
Phoenix sits in the Sonoran Desert, with broad streets and open desert parks. This point represents central Phoenix rather than a specific trail or shaded resort area.
When to check the UV here
UV and heat need separate checks. Moving an activity to a lower-UV hour does not by itself establish that the temperature or trail conditions are suitable. Check local weather and park guidance as well.
Planning your time outside
Choose a route with shelter and bring covering for exposed stretches. Use the hourly UV curve to help time the outing, while planning separately for desert heat.
How to read this forecast
The chart loads hourly model data from currentuvindex.com for 33.4484, -112.074. 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.