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UV Index in San Jose, US

UV index


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Today's UV index in San Jose, United States United States will be up to 2.2, indicating low 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

Today, the UV index suggests low sun danger (0-2) in San Jose, reaching up to 2.2. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.

San Jose Weather

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

UV Index in San Jose

San Jose has a moderate UV index ranging from 4 to 6 (moderate to high) throughout the year due to its sunny climate. Sunscreen and protective clothing are necessary to prevent sunburn and skin damage.

Weather Seasons

UV index

San Jose experiences a Mediterranean climate with warm, dry summers and mild, wet winters. Summer temperatures average around 27 °C (80 °F) but can reach the high 30s °C (up to 100 °F). Winters are mild with temperatures averaging around 13 °C (55 °F), and occasional rainfall.

San Jose's Climate

Compared to its region, San Jose receives more sun exposure due to its location in the center of Silicon Valley. The region enjoys approximately 300 sunny days per year. However, coastal influences can bring foggy conditions in the mornings, especially during spring and early summer.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in San Jose. 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 San Jose (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.