UV Index Today in Alameda County, California (CA)

Wednesday, November 4, 2026 -9:18 AM PST (GMT-8)

The average maximum UV Index today across 29 locations in Alameda County, California (CA), is 3.4. The highest projected maximum is 3.8 in San Jose at 12:00 PM PST, while the lowest projected maximum is 3.2 in Richmond at 12:00 PM PST.

Tomorrow, the average maximum UV Index across those same locations is expected to be 3.4. The highest projected maximum is 3.6 in San Jose at 12:00 PM PST, and the lowest projected maximum is 3.3 in Richmond at 12:00 PM PST.

29 Places in Alameda County, California (CA)

Maximum UV Index Today
  • Fremont - 3.6
  • Oakland - 3.5
  • San Francisco - 3.5
  • San Jose - 3.8