Hourly Weather | Today Wednesday, October 15, 2025
Chicago, Illinois
3 AM
Cloudy Weather
61°
Feels Like 55°
23
Humidity: 76%
Wind: 15 mph
UV Index: 0
4 AM
Cloudy Weather
61°
Feels Like 54°
28
Humidity: 76%
Wind: 15 mph
UV Index: 0
5 AM
Rainy Weather
59°
Feels Like 50°
56
Humidity: 77%
Wind: 15 mph
UV Index: 0
6 AM
Cloudy Weather
57°
Feels Like 52°
48
Humidity: 77%
Wind: 15 mph
UV Index: 0
7 AM
Rainy Weather
57°
Feels Like 48°
56
Humidity: 79%
Wind: 14 mph
UV Index: 0
8 AM
Rainy Weather
57°
Feels Like 50°
51
Humidity: 81%
Wind: 13 mph
UV Index: 1
9 AM
Rainy Weather
57°
Feels Like 52°
51
Humidity: 79%
Wind: 13 mph
UV Index: 3
10 AM
Cloudy Weather
57°
Feels Like 54°
49
Humidity: 78%
Wind: 12 mph
UV Index: 5
11 AM
Cloudy Weather
57°
Feels Like 54°
34
Humidity: 77%
Wind: 12 mph
UV Index: 6
12 PM
Cloudy Weather
59°
Feels Like 55°
34
Humidity: 76%
Wind: 12 mph
UV Index: 8
1 PM
Cloudy Weather
59°
Feels Like 55°
24
Humidity: 76%
Wind: 12 mph
UV Index: 9
2 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 74%
Wind: 12 mph
UV Index: 15
3 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 71%
Wind: 12 mph
UV Index: 12
4 PM
Cloudy Weather
63°
Feels Like 59°
4
Humidity: 67%
Wind: 12 mph
UV Index: 9
5 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 70%
Wind: 12 mph
UV Index: 6
6 PM
Cloudy Weather
61°
Feels Like 55°
4
Humidity: 70%
Wind: 12 mph
UV Index: 2
7 PM
Cloudy Night
61°
Feels Like 55°
3
Humidity: 72%
Wind: 10 mph
UV Index: 0
8 PM
Cloudy Night
59°
Feels Like 55°
2
Humidity: 74%
Wind: 9 mph
UV Index: 0
9 PM
Cloudy Night
59°
Feels Like 55°
2
Humidity: 75%
Wind: 9 mph
UV Index: 0
10 PM
Cloudy Night
59°
Feels Like 55°
2
Humidity: 75%
Wind: 9 mph
UV Index: 0
11 PM
Cloudy Night
59°
Feels Like 55°
2
Humidity: 76%
Wind: 9 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
38 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.15 µg/m³
  • PM10: 10.43 µg/m³
  • O3: 0.024 ppm
  • NO2: 6 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

4 AM
36 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.64 µg/m³
  • PM10: 9.84 µg/m³
  • O3: 0.022 ppm
  • NO2: 6 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

5 AM
34 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.27 µg/m³
  • PM10: 9.39 µg/m³
  • O3: 0.020 ppm
  • NO2: 6 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

6 AM
32 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.78 µg/m³
  • PM10: 8.82 µg/m³
  • O3: 0.019 ppm
  • NO2: 6.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

7 AM
30 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.22 µg/m³
  • PM10: 8.24 µg/m³
  • O3: 0.018 ppm
  • NO2: 6.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

8 AM
28 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.77 µg/m³
  • PM10: 7.78 µg/m³
  • O3: 0.017 ppm
  • NO2: 7.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

9 AM
27 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.57 µg/m³
  • PM10: 7.57 µg/m³
  • O3: 0.016 ppm
  • NO2: 7.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

10 AM
29 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.9 µg/m³
  • PM10: 7.89 µg/m³
  • O3: 0.017 ppm
  • NO2: 7.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

11 AM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.88 µg/m³
  • PM10: 9.83 µg/m³
  • O3: 0.023 ppm
  • NO2: 5.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

12 PM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.06 µg/m³
  • PM10: 10.99 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

1 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.97 µg/m³
  • PM10: 11.89 µg/m³
  • O3: 0.029 ppm
  • NO2: 4.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.48 µg/m³
  • PM10: 14.42 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.95 µg/m³
  • PM10: 15.92 µg/m³
  • O3: 0.041 ppm
  • NO2: 3 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.32 µg/m³
  • PM10: 16.33 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 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: 15.29 µg/m³
  • PM10: 16.43 µg/m³
  • O3: 0.039 ppm
  • NO2: 4.6 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.92 µg/m³
  • PM10: 16.25 µg/m³
  • O3: 0.034 ppm
  • NO2: 6.7 ppb
  • SO2: 1.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.55 µg/m³
  • PM10: 16.11 µg/m³
  • O3: 0.029 ppm
  • NO2: 8.3 ppb
  • SO2: 1.7 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.

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

Pollutant Concentrations:

  • PM2.5: 13.96 µg/m³
  • PM10: 15.74 µg/m³
  • O3: 0.025 ppm
  • NO2: 9.6 ppb
  • SO2: 2 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.

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

Pollutant Concentrations:

  • PM2.5: 13.49 µg/m³
  • PM10: 15.46 µg/m³
  • O3: 0.021 ppm
  • NO2: 10.4 ppb
  • SO2: 2.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.06 µg/m³
  • PM10: 15.12 µg/m³
  • O3: 0.019 ppm
  • NO2: 10.6 ppb
  • SO2: 2.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.52 µg/m³
  • PM10: 14.56 µg/m³
  • O3: 0.018 ppm
  • NO2: 10.3 ppb
  • SO2: 2.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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