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

As of 6:57 PM PDT on April 4, 2025, all 1 cities in San Francisco County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is San Francisco, CA with a reading of 0.6.

Over the next 24 hours, the highest UV Index reading in San Francisco County, CA is expected to be 6.2 in San Francisco between 1:00 PM - 2:00 PM PDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in San Francisco County, CA as of 6:57 PM PDT, April 4, 2025

Current UV Index in Cities in San Francisco County, CA

6:57 PM PDT, April 4, 2025