Hourly Weather | Today Wednesday, March 18, 2026
Berwyn, Illinois
6 AM
Snowy Weather
25°
Feels Like
55
Frost Risk: 45%
Humidity: 81%
UV Index: 0
Wind: 16 mph
7 AM
Cloudy Weather
27°
Feels Like 10°
47
Humidity: 81%
UV Index: 0
Wind: 16 mph
8 AM
Snowy Weather
25°
Feels Like
47
Frost Risk: 82%
Humidity: 78%
UV Index: 0
Wind: 15 mph
9 AM
Snowy Weather
27°
Feels Like 10°
47
Frost Risk: 49%
Humidity: 78%
UV Index: 1
Wind: 16 mph
10 AM
Snowy Weather
28°
Feels Like 12°
47
Humidity: 76%
UV Index: 1
Wind: 17 mph
11 AM
Cloudy Weather
30°
Feels Like 18°
40
Humidity: 73%
UV Index: 2
Wind: 16 mph
12 PM
Cloudy Weather
34°
Feels Like 23°
34
Humidity: 69%
UV Index: 2
Wind: 16 mph
1 PM
Cloudy Weather
36°
Feels Like 27°
27
Humidity: 67%
UV Index: 2
Wind: 15 mph
2 PM
Cloudy Weather
39°
Feels Like 34°
14
Humidity: 64%
UV Index: 3
Wind: 12 mph
3 PM
Cloudy Weather
41°
Feels Like 39°
14
Humidity: 62%
UV Index: 3
Wind: 11 mph
4 PM
Cloudy Weather
43°
Feels Like 41°
14
Humidity: 61%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
45°
Feels Like 41°
14
Humidity: 61%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
41°
Feels Like 39°
14
Humidity: 67%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
39°
Feels Like 37°
11
Humidity: 73%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
39°
Feels Like 37°
7
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
37°
Feels Like 36°
7
Humidity: 80%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Weather
36°
Feels Like 36°
7
Humidity: 83%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Night
36°
Feels Like 36°
7
Humidity: 84%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.44 µg/m³
  • PM10: 3.56 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.

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

Pollutant Concentrations:

  • PM2.5: 3.6 µg/m³
  • PM10: 3.78 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.99 µg/m³
  • PM10: 4.31 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.4 ppb
  • SO2: 1 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: 4.34 µg/m³
  • PM10: 4.83 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.1 ppb
  • SO2: 1.2 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: 4.63 µg/m³
  • PM10: 5.24 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.1 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.15 µg/m³
  • PM10: 5.83 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.8 ppb
  • SO2: 1.2 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: 6.02 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.5 ppb
  • SO2: 0.9 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: 7.36 µg/m³
  • PM10: 7.99 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.96 µg/m³
  • PM10: 9.59 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.5 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
66 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.18 µg/m³
  • PM10: 10.86 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.8 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 11.07 µg/m³
  • PM10: 11.84 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.8 ppb
  • SO2: 0.7 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.

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

Pollutant Concentrations:

  • PM2.5: 11.96 µg/m³
  • PM10: 12.87 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 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.

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

Pollutant Concentrations:

  • PM2.5: 13.32 µg/m³
  • PM10: 14.39 µg/m³
  • O3: 0.052 ppm
  • NO2: 4 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.73 µg/m³
  • PM10: 16 µg/m³
  • O3: 0.045 ppm
  • NO2: 7.1 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 16.16 µg/m³
  • PM10: 17.61 µg/m³
  • O3: 0.040 ppm
  • NO2: 8.7 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 17.69 µg/m³
  • PM10: 19.3 µg/m³
  • O3: 0.036 ppm
  • NO2: 9.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.36 µg/m³
  • PM10: 21.06 µg/m³
  • O3: 0.033 ppm
  • NO2: 9 ppb
  • SO2: 0.2 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.

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

Pollutant Concentrations:

  • PM2.5: 20.22 µg/m³
  • PM10: 21.95 µg/m³
  • O3: 0.030 ppm
  • NO2: 8.5 ppb
  • SO2: 0.1 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.