Hourly Weather | Today Thursday, February 5, 2026
Decatur, Illinois
9 PM
Cloudy Night
27°
Feels Like 18°
0
Humidity: 88%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
27°
Feels Like 19°
0
Humidity: 92%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
27°
Feels Like 19°
0
Frost Risk: 84%
Humidity: 91%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.11 µg/m³
  • PM10: 20.14 µg/m³
  • O3: 0.026 ppm
  • NO2: 8.4 ppb
  • SO2: 1.4 ppb
  • CO: 0.23 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.27 µg/m³
  • PM10: 20.29 µg/m³
  • O3: 0.025 ppm
  • NO2: 8.6 ppb
  • SO2: 1.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.79 µg/m³
  • PM10: 19.71 µg/m³
  • O3: 0.023 ppm
  • NO2: 8.8 ppb
  • SO2: 1 ppb
  • CO: 0.24 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.