Alameda County, CA: Current UV Index and Hourly Forecast

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As of 2:52 PM PDT on July 15, 2026, all 20 cities in Alameda County, CA in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Hayward, CA with a reading of 9.6.

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

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Current UV Index in Cities in Alameda County, CA

• Alameda - 9.5
• Albany - 9.4
• Ashland - 9.6
• Berkeley - 9.5
• Castro Valley - 9.6
• Cherryland - 9.6
• Dublin - 9.6
• Emeryville - 9.5
• Fairview - 9.6
• Fremont - 9.4
• Hayward - 9.6
• Livermore - 9.5
• Newark - 9.4
• Oakland - 9.5
• Piedmont - 9.5
• Pleasanton - 9.6
• San Leandro - 9.5
• San Lorenzo - 9.5
• Sunol - 9.4
• Union City - 9.4