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