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UV Index in Phoenix, US

UV index


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Today's UV index in Phoenix, United States United States will be up to 3.1, indicating moderate risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

With a UV index reaching up to 3.1 in Phoenix, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.

Phoenix Weather

Read more here about the climate and sun exposure in and around Phoenix.

UV Index in Phoenix

The UV index in Phoenix, United States, can be quite high. During summer, when temperatures soar, the UV index can reach extreme levels, often exceeding 10 out of a possible 11. This means that sun protection is crucial to avoid harmful effects of the sun's rays. It is recommended to use sunscreen with a high SPF, wear protective clothing, and limit sun exposure during peak hours from 10 am to 4 pm.

Weather Seasons

UV index

Phoenix experiences two primary weather seasons: a hot and dry season, and a milder and slightly wetter season. From May to September, temperatures in Phoenix can reach scorching levels, often exceeding 100 °F (38 °C). This period is characterized by clear skies and minimal rainfall. The cooler season, from October to April, brings more moderate temperatures, with highs ranging from 65-80 °F (18-27 °C). Rains are infrequent, but occasional showers occur during this time.

Phoenix's Climate

Compared to its region, Phoenix receives ample sunshine throughout the year. The city benefits from its desert location with over 300 sunny days annually. Its proximity to the Sonoran Desert and lack of nearby mountains also contribute to its high sun exposure. This makes Phoenix a popular destination for outdoor activities, but also requires residents and visitors to take precautions against sunburn and heat-related illnesses.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Phoenix. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in Phoenix (United States) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.