Hourly Weather | Today Wednesday, December 24, 2025
Chicago, Illinois
11 AM
Cloudy Weather
41°
Feels Like 37°
3
Humidity: 77%
Wind: 9 mph
UV Index: 2
12 PM
Cloudy Weather
41°
Feels Like 37°
6
Humidity: 69%
Wind: 9 mph
UV Index: 2
1 PM
Cloudy Weather
43°
Feels Like 37°
15
Humidity: 68%
Wind: 9 mph
UV Index: 2
2 PM
Cloudy Weather
43°
Feels Like 39°
15
Humidity: 66%
Wind: 9 mph
UV Index: 1
3 PM
Cloudy Weather
45°
Feels Like 39°
19
Humidity: 64%
Wind: 9 mph
UV Index: 0
4 PM
Cloudy Weather
43°
Feels Like 37°
37
Humidity: 68%
Wind: 9 mph
UV Index: 0
5 PM
Rainy Weather
43°
Feels Like 36°
41
Humidity: 73%
Wind: 7 mph
UV Index: 0
6 PM
Rainy Weather
43°
Feels Like 36°
41
Humidity: 76%
Wind: 7 mph
UV Index: 0
7 PM
Rainy Weather
39°
Feels Like 34°
43
Humidity: 88%
Wind: 8 mph
UV Index: 0
8 PM
Rainy Weather
39°
Feels Like 34°
43
Humidity: 92%
Wind: 7 mph
UV Index: 0
9 PM
Cloudy Weather
39°
Feels Like 36°
39
Humidity: 95%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Weather
39°
Feels Like 36°
34
Humidity: 96%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Weather
39°
Feels Like 37°
37
Humidity: 97%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

11 AM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.64 µg/m³
  • PM10: 17.3 µg/m³
  • O3: 0.016 ppm
  • NO2: 9.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

12 PM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.89 µg/m³
  • PM10: 16.5 µg/m³
  • O3: 0.018 ppm
  • NO2: 8.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

1 PM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.38 µg/m³
  • PM10: 16.07 µg/m³
  • O3: 0.018 ppm
  • NO2: 10.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

2 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.76 µg/m³
  • PM10: 15.49 µg/m³
  • O3: 0.019 ppm
  • NO2: 10.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

3 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.28 µg/m³
  • PM10: 15.04 µg/m³
  • O3: 0.019 ppm
  • NO2: 9.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

4 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14 µg/m³
  • PM10: 15.56 µg/m³
  • O3: 0.020 ppm
  • NO2: 9.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.21 µg/m³
  • PM10: 16.45 µg/m³
  • O3: 0.019 ppm
  • NO2: 9.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

6 PM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.39 µg/m³
  • PM10: 17.4 µg/m³
  • O3: 0.018 ppm
  • NO2: 9.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.23 µg/m³
  • PM10: 18.04 µg/m³
  • O3: 0.017 ppm
  • NO2: 9.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.66 µg/m³
  • PM10: 18.3 µg/m³
  • O3: 0.015 ppm
  • NO2: 9.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.95 µg/m³
  • PM10: 18.46 µg/m³
  • O3: 0.013 ppm
  • NO2: 9.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.49 µg/m³
  • PM10: 18.93 µg/m³
  • O3: 0.012 ppm
  • NO2: 9.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.96 µg/m³
  • PM10: 19.36 µg/m³
  • O3: 0.010 ppm
  • NO2: 9.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.28 ppm

Health Recommendations:

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