San Mateo County, CA: Current UV Index and Hourly Forecast

As of 12:41 AM PST on February 24, 2025, all 33 cities in San Mateo County, CA in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in San Mateo County, CA is expected to be 4.2 in Daly City between 12:00 PM - 1:00 PM PST today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in San Mateo County, CA as of 12:41 AM PST, February 24, 2025

Current UV Index in Cities in San Mateo County, CA

12:41 AM PST, February 24, 2025