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 5.3. The highest projected maximum is 5.8 in Tiburon at 12:00 PM PDT, while the lowest projected maximum is 5.1 in San Francisco at 12:00 PM PDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 6.3. The highest projected maximum is 6.6 in Alameda at 1:00 PM PDT, and the lowest projected maximum is 6.1 in San Francisco at 1:00 PM PDT.