SunticUV index in Phoenix today
Phoenix is one of the sunniest major cities in the United States, with desert skies and extreme summer UV. The only accurate figure is a live one for your exact spot: Suntic shows Phoenix's real-time UV index and a 10-day forecast.
Sun and UV in Phoenix
The Sonoran Desert gives Phoenix clear skies almost year-round and very little cloud cover to soften the sun. From late spring through early autumn, midday UV frequently reaches the very high to extreme range. The dry heat can be deceptive: your skin is exposed to powerful UV long before you feel uncomfortable.
When is UV highest in Phoenix?
UV is highest around solar noon (broadly 10am to 4pm) and strongest across May to September. The exact peak shifts with the season and the day's weather. For more on this, see when is the sun strongest.
The UV index scale
| UV index | Risk level | What to do |
|---|---|---|
| 0-2 | Low | Minimal risk. Safe to be outside; sunglasses on bright days. |
| 3-5 | Moderate | Take care at midday. Use SPF 30+, a hat and shade around noon. |
| 6-7 | High | Protection needed. SPF 30+, cover up, seek shade 10am-4pm. |
| 8-10 | Very high | Extra protection. Avoid the sun at midday; SPF, clothing and shade are essential. |
| 11+ | Extreme | Take all precautions. Unprotected skin can burn quickly; stay inside or fully covered at peak hours. |
UV index categories follow the World Health Organization / US EPA scale.
Staying sun-safe in Phoenix
- Extreme summer UV means unprotected skin can burn quickly around midday, so seek shade and cover up.
- Pavement and light desert surfaces reflect additional UV in the city.
- Early morning and evening are far gentler windows for being outdoors in summer.
Wherever you are, the basics hold: use broad-spectrum SPF 30+, seek shade around midday, cover up, and never let your skin burn. See our sunburn prevention tips.
See Phoenix's live UV index
Suntic turns the live UV index into personal safe-sun times, sunscreen reminders and vitamin D tracking on your iPhone.
