Alameda County, CA: Current UV Index and Hourly Forecast

As of 1:14 PM PDT on April 21, 2025, 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 7.7.

Over the next 24 hours, the highest UV Index reading in Alameda County, CA is expected to be 7.7 in Hayward between 1:00 PM - 2:00 PM PDT today.

Search Cities in Alameda County, CA

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Alameda County, CA as of 1:14 PM PDT, April 21, 2025

Current UV Index in Cities in Alameda County, CA

1:14 PM PDT, April 21, 2025