Hourly Weather | Today Thursday, May 21, 2026
Joliet, Illinois
11 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 61%
UV Index: 5
Wind: 13 mph
12 PM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 50%
UV Index: 6
Wind: 13 mph
1 PM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 46%
UV Index: 8
Wind: 13 mph
2 PM
Cloudy Weather
66°
Feels Like 72°
0
Humidity: 44%
UV Index: 7
Wind: 14 mph
3 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 45%
UV Index: 5
Wind: 15 mph
4 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 46%
UV Index: 3
Wind: 15 mph
5 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 47%
UV Index: 2
Wind: 15 mph
6 PM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 49%
UV Index: 1
Wind: 14 mph
7 PM
Cloudy Weather
57°
Feels Like 54°
1
Humidity: 52%
UV Index: 1
Wind: 14 mph
8 PM
Cloudy Weather
55°
Feels Like 50°
3
Humidity: 58%
UV Index: 0
Wind: 13 mph
9 PM
Cloudy Weather
55°
Feels Like 50°
3
Humidity: 62%
UV Index: 0
Wind: 12 mph
10 PM
Cloudy Weather
54°
Feels Like 48°
3
Humidity: 68%
UV Index: 0
Wind: 10 mph
11 PM
Cloudy Weather
54°
Feels Like 48°
3
Humidity: 69%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.99 µg/m³
  • PM10: 7.6 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.61 µg/m³
  • PM10: 7.12 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.05 µg/m³
  • PM10: 6.51 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.2 µg/m³
  • PM10: 4.6 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.6 µg/m³
  • PM10: 3.95 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

4 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.56 µg/m³
  • PM10: 3.9 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.61 µg/m³
  • PM10: 3.95 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.67 µg/m³
  • PM10: 4.01 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.56 µg/m³
  • PM10: 3.9 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.29 µg/m³
  • PM10: 3.65 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 3.44 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.04 µg/m³
  • PM10: 3.48 µg/m³
  • O3: 0.051 ppm
  • NO2: 2 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.49 µg/m³
  • PM10: 3.99 µg/m³
  • O3: 0.050 ppm
  • NO2: 2 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 ppm

Health Recommendations:

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