Hourly Weather | Today Thursday, February 5, 2026
O'Fallon, Missouri
9 PM
Cloudy Night
36°
Feels Like 28°
0
Humidity: 80%
UV Index: 0
Wind: 8 mph
10 PM
Night
34°
Feels Like 28°
0
Humidity: 81%
UV Index: 0
Wind: 8 mph
11 PM
Night
34°
Feels Like 27°
0
Humidity: 82%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.11 µg/m³
  • PM10: 8.13 µg/m³
  • O3: 0.036 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.33 µg/m³
  • PM10: 8.35 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.11 µg/m³
  • PM10: 8.14 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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