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

• USA →
• California →
• San Mateo County

As of 11:35 PM PDT on March 29, 2026, 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 6 in Daly City between 2:00 PM - 3:00 PM PDT tomorrow.

Search Cities in San Mateo County, CA

Current UV Index in Cities in San Mateo County, CA

• Atherton - 0
• Baywood Park - 0
• Belmont - 0
• Brisbane - 0
• Broadmoor - 0
• Burlingame - 0
• Colma - 0
• Daly City - 0
• East Palo Alto - 0
• El Granada - 0
• Emerald Lake Hills - 0
• Foster City - 0
• Half Moon Bay - 0
• Highlands - 0
• Hillsborough - 0
• La Honda - 0
• Ladera - 0
• Loma Mar - 0
• Menlo Park - 0
• Millbrae - 0
• Montara - 0
• Moss Beach - 0
• North Fair Oaks - 0
• Pacifica - 0
• Pescadero - 0
• Portola Valley - 0
• Redwood City - 0
• San Bruno - 0
• San Carlos - 0
• San Mateo - 0
• South San Francisco - 0
• West Menlo Park - 0
• Woodside - 0