UV Index
UV Index
Today's UV index in San Jose, United States 
will be up to 8.9, 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: 2025-05-09
With a UV index of 8.9 in San Jose, 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.
San Jose's UV index is generally moderate to high, especially during summer months, often ranging from 6 to 9. This means the sun's rays can be quite strong on clear days.
San Jose experiences warm, dry summers and mild, wet winters. Most rain falls between November and March, while summers are usually sunny and dry, making it a Mediterranean climate.
Compared to other parts of California, San Jose is warmer and drier than coastal cities like San Francisco but cooler and less arid than places in the Central Valley. It has milder weather than neighboring inland areas in Nevada or Arizona.
See the UV index hour by hour for San Jose, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.