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

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As of 12:15 PM PDT on September 8, 2026, all 23 cities in Santa Clara County, CA in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Gilroy, CA with a reading of 7.4.

Over the next 24 hours, the highest UV Index reading in Santa Clara County, CA is expected to be 8.3 in Gilroy between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Santa Clara County, CA

• Alum Rock - 7
• Cambrian Park - 6.8
• Campbell - 6.8
• Cupertino - 6.8
• East Foothills - 7.1
• Fruitdale - 6.8
• Gilroy - 7.4
• Lexington Hills - 6.8
• Los Altos - 6.8
• Los Altos Hills - 6.9
• Los Gatos - 6.8
• Loyola - 6.8
• Milpitas - 6.8
• Monte Sereno - 6.8
• Morgan Hill - 7
• Mountain View - 6.8
• Palo Alto - 6.8
• San Jose - 7
• San Martin - 7.4
• Santa Clara - 6.8
• Saratoga - 6.8
• Stanford - 6.8
• Sunnyvale - 6.8