Hourly Weather | Today Thursday, June 4, 2026
Chicago, Illinois
3 AM
Night
64°
Feels Like 63°
0
Humidity: 63%
UV Index: 0
Wind: 7 mph
4 AM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 63%
UV Index: 0
Wind: 8 mph
5 AM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 64%
UV Index: 0
Wind: 8 mph
6 AM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 66%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 61%
UV Index: 1
Wind: 8 mph
8 AM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 56%
UV Index: 2
Wind: 9 mph
9 AM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 50%
UV Index: 3
Wind: 10 mph
10 AM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 45%
UV Index: 5
Wind: 10 mph
11 AM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 41%
UV Index: 7
Wind: 12 mph
12 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 38%
UV Index: 9
Wind: 12 mph
1 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 36%
UV Index: 10
Wind: 12 mph
2 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 35%
UV Index: 9
Wind: 13 mph
3 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 33%
UV Index: 7
Wind: 13 mph
4 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 35%
UV Index: 5
Wind: 13 mph
5 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 35%
UV Index: 3
Wind: 13 mph
6 PM
Cloudy Weather
82°
Feels Like 81°
0
Humidity: 38%
UV Index: 2
Wind: 13 mph
7 PM
Cloudy Weather
81°
Feels Like 79°
0
Humidity: 41%
UV Index: 1
Wind: 13 mph
8 PM
Cloudy Weather
81°
Feels Like 77°
0
Humidity: 43%
UV Index: 0
Wind: 12 mph
9 PM
Cloudy Night
79°
Feels Like 75°
0
Humidity: 48%
UV Index: 0
Wind: 10 mph
10 PM
Cloudy Night
75°
Feels Like 73°
0
Humidity: 50%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Night
75°
Feels Like 72°
0
Humidity: 54%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 11.41 µg/m³
  • PM10: 11.91 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.62 µg/m³
  • PM10: 12.13 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.64 µg/m³
  • PM10: 12.14 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.52 µg/m³
  • PM10: 12.03 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.2 µg/m³
  • PM10: 11.72 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.74 µg/m³
  • PM10: 11.31 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.49 µg/m³
  • PM10: 11.11 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.7 ppb
  • SO2: 1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.7 µg/m³
  • PM10: 11.36 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.3 ppb
  • SO2: 1.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 AM
72 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.25 µg/m³
  • PM10: 9.83 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.6 ppb
  • SO2: 1.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

12 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.45 µg/m³
  • PM10: 8.97 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.3 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

1 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.39 µg/m³
  • PM10: 8.89 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
84 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.48 µg/m³
  • PM10: 8.98 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.46 µg/m³
  • PM10: 8.96 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
78 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.42 µg/m³
  • PM10: 8.94 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 PM
75 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.41 µg/m³
  • PM10: 8.95 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

6 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.3 µg/m³
  • PM10: 8.86 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.93 µg/m³
  • PM10: 8.51 µg/m³
  • O3: 0.059 ppm
  • NO2: 1 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

8 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.54 µg/m³
  • PM10: 8.14 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

9 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.36 µg/m³
  • PM10: 7.97 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.32 µg/m³
  • PM10: 7.94 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.28 µg/m³
  • PM10: 7.91 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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