UV Index in Tucson, Arizona, United States

· America/Phoenix

5.6
Moderate · clear-sky maximum Tuesday, October 20, 2026

At solar noon (12:08:33 PM) the sun reaches 47.2° above the horizon in Tucson. Without clouds, that corresponds to a maximum UV index of about 5.6 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.

☀️ Sun Safety: When the UV index is high, protect yourself with sunscreen, shade, and a hat. Values of 6 or more indicate increased sunburn risk!

UV index in Tucson, next 14 days

DateSun at noonClear-sky maxForecast max
47.2° 5.6 Moderate —
46.9° 5.5 Moderate —
46.5° 5.4 Moderate —
46.2° 5.4 Moderate —
45.8° 5.3 Moderate —
45.5° 5.2 Moderate —
45.2° 5.1 Moderate —
44.8° 5.1 Moderate —
44.5° 5.0 Moderate —
44.2° 4.9 Moderate —
43.8° 4.9 Moderate —
43.5° 4.8 Moderate —
43.2° 4.7 Moderate —
42.9° 4.6 Moderate —

Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.

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The UV index in Tucson measures the intensity of ultraviolet radiation reaching the ground. Values below 3 are considered low risk, while 6 and above require sun protection such as sunscreen, sunglasses, and shade. The clear-sky value shows how strong the sun can get on each day; the forecast shows what is expected with clouds. See today's sunrise and sunset times for Tucson or discover the best light for photos during the golden hour in Tucson.

About Tucson

Tucson has existed as a municipality since 1775 and serves as the county seat of Pima County, Arizona. Covering an area of 598.6 square kilometers at an elevation of 728 meters, the city is situated on the Santa Cruz River. As of 2020, the population was 542,629. Key features include the University of Arizona, which operates as a public land-grant university, alongside the Tucson International Airport and the Cathedral of Saint Augustine. The city maintains formal international connections with Pécs, Nouakchott, Fiesole, Segovia, and Hermosillo. Its infrastructure includes the Tucson station and cultural venues such as the Rialto Theatre.

AI-assisted description based on geographic data and editorial notes.