Hourly Weather | Today › Sunday, November 1, 2026
O'Fallon, Missouri
11 PM
Cloudy Weather
59°
Feels Like 55°
9
Humidity: 90%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.38 µg/m³
  • PM10: 4.55 µg/m³
  • O3: 0.028 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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