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

As of 7:00 AM PDT on October 4, 2024, 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 5.8 in Portola Valley between 1:00 PM - 2:00 PM PDT today.

Search Cities in San Mateo County, CA

UV Index Risk Levels
Range 0 - 23 - 56 - 78 - 1011+
Color
Risk LowModerateHighVery HighExtreme
UV Index in San Mateo County, CA as of 7:00 AM PDT, October 4, 2024

Current UV Index in Cities in San Mateo County, CA

7:00 AM PDT, October 4, 2024