Alameda County, CA: Current UV Index and Hourly Forecast

As of 1:22 PM PDT on October 17, 2025, all 20 cities in Alameda County, CA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Livermore, CA with a reading of 5.

Over the next 24 hours, the highest UV Index reading in Alameda County, CA is expected to be 5 in Livermore between 1:00 PM - 2:00 PM PDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Alameda County, CA as of 1:22 PM PDT, October 17, 2025

Current UV Index in Cities in Alameda County, CA

1:22 PM PDT, October 17, 2025