Hourly Weather | Today › Monday, October 12, 2026
St. Charles, Missouri
10 PM
Cloudy Night
79°
Feels Like 75°
0
Humidity: 54%
UV Index: 0
Wind: 9 mph
11 PM
Night
75°
Feels Like 73°
0
Humidity: 60%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.13 µg/m³
  • PM10: 5.99 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.07 µg/m³
  • PM10: 5.67 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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