Arizona UV Index by City
Arizona's low latitude, clear desert skies and elevation combine to produce some of the highest UV in the country. Choose your city below for a labelled typical hourly reference and a location-aware current-UV check.
Arizona consistently records very high UV because of its southern latitude, dry cloud-free air and elevation, with Phoenix, Tucson and Scottsdale routinely peaking in the EPA very high (8+) band, and nearby Palm Springs similar. UV is strongest at midday and from late spring through early fall, and the WHO advises protecting from UV 3 and up. Each linked city page starts with a labelled typical reference and shows current and forecast UV only after a usable response; these are estimates to manage burn risk, not a promise of a safe tan or medical advice, and altitude plus desert reflection can raise real exposure further.
UV by city in Arizona
Plan from Arizona UV
Source & freshness
Each city page starts with a labelled typical clear-sky reference for Arizona and replaces it only after a usable current UV response. Failed requests remain visibly labelled as reference data. Estimates only — not medical advice.
Questions
Which Arizona city has the highest UV?
Tucson and Scottsdale often edge out Phoenix in typical peak references because of slightly higher elevation and very clear air, but all three regularly reach the EPA very high (8+) band on clear summer middays, and Palm Springs (just across the line) behaves similarly. The differences between Arizona's desert cities are small; clear skies and altitude keep UV extreme across the board, so use the current-UV check before acting. These are estimates, not medical advice.
When is UV lowest in Arizona?
UV is typically lowest in the early morning and late afternoon, and seasonally in the winter months when the sun sits lower. Because of Arizona's low latitude and clear skies, though, winter middays can still reach the EPA moderate-to-high range, and the EPA flags UV 3+ as worth protecting against even off-season. Clouds, altitude and reflective desert ground can change real exposure, so use each city page's labelled reference for orientation and its current forecast after a usable update.
Is it safe to tan in Arizona at midday?
Arizona middays (roughly 10am-4pm) very frequently sit in the EPA very high (8+) or extreme range, so the WHO advice to protect from UV 3+ strongly applies and burn risk is at its highest. No tan is truly safe because tanning is UV damage; if you're outside, the FDA recommends broad-spectrum SPF 30+ reapplied every 2 hours and after sweating, plus shade and protective clothing. Our tanning-time numbers are risk-managed estimates, not medical advice, and your Fitzpatrick skin type, medications, altitude and ground reflection all change actual risk.