Alameda County, CA: Current UV Index and Hourly Forecast

As of 12:58 PM PDT on August 29, 2025, all 20 cities in Alameda County, CA in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Fremont, CA with a reading of 7.4.

Over the next 24 hours, the highest UV Index reading in Alameda County, CA is expected to be 8.2 in Fremont 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 12:58 PM PDT, August 29, 2025

Current UV Index in Cities in Alameda County, CA

12:58 PM PDT, August 29, 2025