Hourly Weather | Today Tuesday, November 4, 2025
Chicago, Illinois
5 AM
Cloudy Night
45°
Feels Like 41°
0
Humidity: 64%
Wind: 7 mph
UV Index: 0
6 AM
Cloudy Night
45°
Feels Like 41°
0
Humidity: 68%
Wind: 7 mph
UV Index: 0
7 AM
Cloudy Weather
43°
Feels Like 37°
0
Humidity: 72%
Wind: 7 mph
UV Index: 0
8 AM
Cloudy Weather
45°
Feels Like 41°
0
Humidity: 66%
Wind: 8 mph
UV Index: 1
9 AM
Cloudy Weather
46°
Feels Like 45°
0
Humidity: 59%
Wind: 9 mph
UV Index: 2
10 AM
Cloudy Weather
52°
Feels Like 50°
0
Humidity: 53%
Wind: 9 mph
UV Index: 2
11 AM
Cloudy Weather
55°
Feels Like 55°
0
Humidity: 45%
Wind: 9 mph
UV Index: 3
12 PM
Cloudy Weather
57°
Feels Like 57°
0
Humidity: 38%
Wind: 9 mph
UV Index: 3
1 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 35%
Wind: 9 mph
UV Index: 3
2 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 33%
Wind: 9 mph
UV Index: 2
3 PM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 35%
Wind: 10 mph
UV Index: 2
4 PM
Cloudy Weather
59°
Feels Like 55°
0
Humidity: 38%
Wind: 10 mph
UV Index: 1
5 PM
Cloudy Night
57°
Feels Like 54°
0
Humidity: 44%
Wind: 10 mph
UV Index: 0
6 PM
Cloudy Night
55°
Feels Like 52°
0
Humidity: 49%
Wind: 10 mph
UV Index: 0
7 PM
Night
55°
Feels Like 48°
0
Humidity: 56%
Wind: 12 mph
UV Index: 0
8 PM
Night
54°
Feels Like 48°
0
Humidity: 65%
Wind: 13 mph
UV Index: 0
9 PM
Night
54°
Feels Like 46°
0
Humidity: 71%
Wind: 14 mph
UV Index: 0
10 PM
Night
54°
Feels Like 46°
0
Humidity: 77%
Wind: 15 mph
UV Index: 0
11 PM
Night
54°
Feels Like 46°
0
Humidity: 79%
Wind: 16 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 6.61 µg/m³
  • O3: 0.013 ppm
  • NO2: 7.5 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.23 µg/m³
  • PM10: 6.85 µg/m³
  • O3: 0.012 ppm
  • NO2: 7.6 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.38 µg/m³
  • PM10: 7.02 µg/m³
  • O3: 0.010 ppm
  • NO2: 8.2 ppb
  • SO2: 0 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.45 µg/m³
  • PM10: 7.14 µg/m³
  • O3: 0.010 ppm
  • NO2: 8.5 ppb
  • SO2: 0 ppb
  • CO: 0.22 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: 6.55 µg/m³
  • PM10: 7.28 µg/m³
  • O3: 0.013 ppm
  • NO2: 7 ppb
  • SO2: 0.1 ppb
  • CO: 0.23 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.94 µg/m³
  • PM10: 6.59 µg/m³
  • O3: 0.031 ppm
  • NO2: 3.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

11 AM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.34 µg/m³
  • PM10: 7.01 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

12 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.94 µg/m³
  • PM10: 7.64 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

1 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.95 µg/m³
  • PM10: 8.66 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

2 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.91 µg/m³
  • PM10: 9.69 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

3 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.9 µg/m³
  • PM10: 10.75 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.3 ppb
  • SO2: 1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.09 µg/m³
  • PM10: 12.05 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.49 µg/m³
  • PM10: 13.65 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.58 µg/m³
  • PM10: 14.94 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.77 µg/m³
  • PM10: 15.2 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.35 µg/m³
  • PM10: 14.76 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.61 µg/m³
  • PM10: 13.96 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
49 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.73 µg/m³
  • PM10: 13.01 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.7 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
45 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.87 µg/m³
  • PM10: 12.1 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.8 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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