UV Index Today in San Francisco County, California (CA)

The average maximum UV Index today across 5 locations in San Francisco County, California (CA), is 9. The highest projected maximum is 9.4 in Alameda at 1:00 PM PDT, while the lowest projected maximum is 8.8 in San Francisco at 1:00 PM PDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 9.1. The highest projected maximum is 9.3 in Alameda at 1:00 PM PDT, and the lowest projected maximum is 8.9 in San Francisco at 1:00 PM PDT.