Santa Clara County, CA: Current UV Index and Hourly Forecast

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As of 7:27 PM PDT on July 28, 2026, all 23 cities in Santa Clara County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is San Jose, CA with a reading of 0.4.

Over the next 24 hours, the highest UV Index reading in Santa Clara County, CA is expected to be 10.2 in San Jose between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Santa Clara County, CA

• Alum Rock - 0.4
• Cambrian Park - 0.4
• Campbell - 0.4
• Cupertino - 0.4
• East Foothills - 0.4
• Fruitdale - 0.4
• Gilroy - 0.4
• Lexington Hills - 0.4
• Los Altos - 0.4
• Los Altos Hills - 0.4
• Los Gatos - 0.4
• Loyola - 0.4
• Milpitas - 0.4
• Monte Sereno - 0.4
• Morgan Hill - 0.4
• Mountain View - 0.4
• Palo Alto - 0.4
• San Jose - 0.4
• San Martin - 0.4
• Santa Clara - 0.4
• Saratoga - 0.4
• Stanford - 0.4
• Sunnyvale - 0.4