UV Index
UV Index
Today's UV index in Phoenix, United States 
will be up to 9.9, indicating a very high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-10
With a UV index of 9.9 in Phoenix, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
Phoenix often has a very high UV index, especially in summer, which means strong sunlight. The UV index can reach 10 or more, making it very intense and potentially harmful without protection.
In Phoenix, summers are extremely hot with very little rain, while winters are mild and dry. Most of the rain arrives during a short monsoon season in the summer, bringing brief thunderstorms.
Compared to nearby cities like Tucson or Los Angeles, Phoenix is hotter and drier. It is one of the sunniest and warmest places in the southwestern United States and is much warmer than northern states.
See the UV index hour by hour for Phoenix, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.