Hourly Weather | Today Wednesday, March 18, 2026
Des Plaines, Illinois
4 AM
Snowy Weather
25°
Feels Like
54
Humidity: 80%
UV Index: 0
Wind: 15 mph
5 AM
Cloudy Weather
25°
Feels Like
47
Frost Risk: 46%
Humidity: 81%
UV Index: 0
Wind: 16 mph
6 AM
Snowy Weather
25°
Feels Like
55
Frost Risk: 54%
Humidity: 80%
UV Index: 0
Wind: 15 mph
7 AM
Cloudy Weather
27°
Feels Like 10°
47
Humidity: 80%
UV Index: 0
Wind: 14 mph
8 AM
Snowy Weather
27°
Feels Like 10°
47
Humidity: 82%
UV Index: 0
Wind: 15 mph
9 AM
Snowy Weather
28°
Feels Like 14°
47
Humidity: 79%
UV Index: 0
Wind: 14 mph
10 AM
Snowy Weather
30°
Feels Like 18°
47
Humidity: 77%
UV Index: 1
Wind: 14 mph
11 AM
Cloudy Weather
34°
Feels Like 23°
40
Humidity: 72%
UV Index: 1
Wind: 13 mph
12 PM
Cloudy Weather
36°
Feels Like 28°
34
Humidity: 69%
UV Index: 1
Wind: 13 mph
1 PM
Cloudy Weather
37°
Feels Like 30°
27
Humidity: 67%
UV Index: 2
Wind: 12 mph
2 PM
Cloudy Weather
39°
Feels Like 36°
14
Humidity: 67%
UV Index: 2
Wind: 9 mph
3 PM
Cloudy Weather
41°
Feels Like 36°
14
Humidity: 67%
UV Index: 1
Wind: 9 mph
4 PM
Cloudy Weather
41°
Feels Like 36°
14
Humidity: 68%
UV Index: 1
Wind: 9 mph
5 PM
Cloudy Weather
43°
Feels Like 37°
14
Humidity: 67%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
39°
Feels Like 36°
14
Humidity: 74%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Weather
37°
Feels Like 36°
11
Humidity: 79%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
37°
Feels Like 34°
5
Humidity: 83%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
36°
Feels Like 34°
5
Humidity: 85%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
36°
Feels Like 34°
6
Humidity: 84%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
36°
Feels Like 34°
7
Humidity: 85%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.51 µg/m³
  • PM10: 3.6 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.48 µg/m³
  • PM10: 3.57 µg/m³
  • O3: 0.052 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.51 µg/m³
  • PM10: 3.62 µg/m³
  • O3: 0.051 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.54 µg/m³
  • PM10: 3.71 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.81 µg/m³
  • PM10: 4.09 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.07 µg/m³
  • PM10: 4.49 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 4.88 µg/m³
  • O3: 0.049 ppm
  • NO2: 2 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 5.53 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.06 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.76 µg/m³
  • PM10: 8.41 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.96 µg/m³
  • PM10: 10.68 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 11.99 µg/m³
  • PM10: 12.8 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.4 ppb
  • SO2: 0.6 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
63 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.65 µg/m³
  • PM10: 14.59 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 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: 15.34 µg/m³
  • PM10: 16.45 µg/m³
  • O3: 0.056 ppm
  • NO2: 3 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 17.1 µg/m³
  • PM10: 18.41 µg/m³
  • O3: 0.050 ppm
  • NO2: 5.9 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 18.57 µg/m³
  • PM10: 20.09 µg/m³
  • O3: 0.043 ppm
  • NO2: 9.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.9 µg/m³
  • PM10: 21.64 µg/m³
  • O3: 0.038 ppm
  • NO2: 11.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 21.39 µg/m³
  • PM10: 23.32 µg/m³
  • O3: 0.035 ppm
  • NO2: 11.6 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 22.93 µg/m³
  • PM10: 24.98 µg/m³
  • O3: 0.032 ppm
  • NO2: 11.4 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 23.67 µg/m³
  • PM10: 25.72 µg/m³
  • O3: 0.030 ppm
  • NO2: 10.6 ppb
  • SO2: 0.2 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.