Hourly Weather | Today Friday, October 31, 2025
San Francisco, California
11 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 90%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

11 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.8 µg/m³
  • PM10: 12.24 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.