Alameda County, CA: Current UV Index and Hourly Forecast

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As of 4:33 PM PST on February 20, 2026, all 20 cities in Alameda County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Oakland, CA with a reading of 0.6.

Over the next 24 hours, the highest UV Index reading in Alameda County, CA is expected to be 3.8 in Fremont between 12:00 PM - 1:00 PM PST tomorrow.

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Current UV Index in Cities in Alameda County, CA

• Alameda - 0.6
• Albany - 0.5
• Ashland - 0.5
• Berkeley - 0.6
• Castro Valley - 0.5
• Cherryland - 0.5
• Dublin - 0.5
• Emeryville - 0.6
• Fairview - 0.5
• Fremont - 0.6
• Hayward - 0.5
• Livermore - 0.5
• Newark - 0.6
• Oakland - 0.6
• Piedmont - 0.6
• Pleasanton - 0.5
• San Leandro - 0.6
• San Lorenzo - 0.6
• Sunol - 0.6
• Union City - 0.6