UV Index
UV Index
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Today's UV index in San Jose, United States 
will be up to 4.5, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.5 in San Jose, 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.
The UV index in San Jose, United States, averages around 6-7 in the summer months, which is considered high. It's recommended to protect your skin during the midday hours when the sun is at its strongest.
San Jose has a Mediterranean climate, with cool, wet winters and warm, dry summers. The city experiences around 300 sunny days per year, making it a great place for outdoor activities.
Compared to its region, San Jose is generally warmer and drier than other parts of California. It also has a more mild climate than neighboring countries like Mexico, which has a tropical climate with hotter temperatures year-round.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in San Jose. It's designed to provide you with a better understanding of the yearly weather and sun exposure.