San Francisco, CA Air Quality

As of 5:38 PM
Air quality index43Good

Air quality is great — a good day to be outside.

Next 24 hours

US AQI
  1. 43Now
  2. 43
  3. 41
  4. 398 PM
  5. 37
  6. 40
  7. 4311 PM
  8. 45
  9. 45
  10. 452 AM
  11. 45
  12. 45
  13. 455 AM
  14. 45
  15. 47
  16. 498 AM
  17. 51
  18. 49
  19. 4711 AM
  20. 45
  21. 46
  22. 482 PM
  23. 49
  24. 48

Air quality outlook

Worst hour each day
  • Today43Good
  • Thu 851Moderate
  • Fri 953Moderate
  • Sat 1043Good
  • Sun 1143Good

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

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About San Francisco weather

San Francisco is in City and County of San Francisco, California, United States at 37.77°, -122.42°. Right now it’s 65° and clear; today’s high is 77° with a 0% chance of rain.

California encompasses an extraordinary range of climates, from the Mediterranean coast to alpine peaks, scorching deserts, and temperate rainforests. The state's Central Valley is one of the most productive agricultural regions in the world, benefiting from warm, dry summers and mild, wet winters. Death Valley holds the record for the highest reliably recorded air temperature on Earth at 134 degrees Fahrenheit.

More California cities

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