Hourly Weather | Today › Friday, October 23, 2026
Chicago, Illinois
10 PM
Cloudy Night
61°
Feels Like 57°
0
Humidity: 69%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 76%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 17.25 µg/m³
  • PM10: 18.37 µg/m³
  • O3: 0.048 ppm
  • NO2: 3.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.98 µg/m³
  • PM10: 19.15 µg/m³
  • O3: 0.047 ppm
  • NO2: 3.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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