Hourly Weather | Today Wednesday, March 18, 2026
Naperville, Illinois
8 AM
Cloudy Weather
25°
Feels Like 10°
47
Frost Risk: 74%
Humidity: 85%
UV Index: 0
Wind: 14 mph
9 AM
Snowy Weather
27°
Feels Like 10°
61
Frost Risk: 61%
Humidity: 86%
UV Index: 1
Wind: 15 mph
10 AM
Snowy Weather
28°
Feels Like 14°
61
Humidity: 81%
UV Index: 1
Wind: 15 mph
11 AM
Cloudy Weather
30°
Feels Like 19°
40
Humidity: 77%
UV Index: 2
Wind: 15 mph
12 PM
Cloudy Weather
34°
Feels Like 25°
34
Humidity: 73%
UV Index: 2
Wind: 15 mph
1 PM
Cloudy Weather
36°
Feels Like 28°
27
Humidity: 71%
UV Index: 2
Wind: 14 mph
2 PM
Cloudy Weather
39°
Feels Like 34°
13
Humidity: 68%
UV Index: 3
Wind: 12 mph
3 PM
Cloudy Weather
41°
Feels Like 37°
13
Humidity: 66%
UV Index: 3
Wind: 10 mph
4 PM
Cloudy Weather
43°
Feels Like 39°
13
Humidity: 64%
UV Index: 2
Wind: 10 mph
5 PM
Cloudy Weather
43°
Feels Like 37°
13
Humidity: 68%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
39°
Feels Like 37°
13
Humidity: 73%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
39°
Feels Like 36°
10
Humidity: 79%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
37°
Feels Like 36°
5
Humidity: 82%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
36°
Feels Like 34°
5
Humidity: 86%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
34°
Feels Like 34°
5
Humidity: 90%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
34°
Feels Like 34°
5
Humidity: 91%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.86 µg/m³
  • PM10: 4.21 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.

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

Pollutant Concentrations:

  • PM2.5: 4 µg/m³
  • PM10: 4.44 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.11 µg/m³
  • PM10: 4.58 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.5 ppb
  • SO2: 0.5 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: 4.6 µg/m³
  • PM10: 5.09 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.68 µg/m³
  • PM10: 6.21 µg/m³
  • O3: 0.051 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.

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

Pollutant Concentrations:

  • PM2.5: 7.25 µg/m³
  • PM10: 7.85 µg/m³
  • O3: 0.053 ppm
  • NO2: 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.

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

Pollutant Concentrations:

  • PM2.5: 9.33 µg/m³
  • PM10: 10.04 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.1 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
61 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.28 µg/m³
  • PM10: 12.13 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.2 ppb
  • SO2: 0.8 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
69 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.88 µg/m³
  • PM10: 13.87 µg/m³
  • O3: 0.060 ppm
  • NO2: 1.3 ppb
  • SO2: 1.2 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.

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

Pollutant Concentrations:

  • PM2.5: 14.34 µg/m³
  • PM10: 15.49 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.4 ppb
  • SO2: 1 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.

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

Pollutant Concentrations:

  • PM2.5: 16.13 µg/m³
  • PM10: 17.47 µg/m³
  • O3: 0.050 ppm
  • NO2: 5.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.75 µg/m³
  • PM10: 19.29 µg/m³
  • O3: 0.044 ppm
  • NO2: 9.2 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
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.14 µg/m³
  • PM10: 20.86 µg/m³
  • O3: 0.039 ppm
  • NO2: 11 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
68 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.46 µg/m³
  • PM10: 22.32 µg/m³
  • O3: 0.037 ppm
  • NO2: 11.1 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
70 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.56 µg/m³
  • PM10: 23.48 µg/m³
  • O3: 0.034 ppm
  • NO2: 10.5 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 21.7 µg/m³
  • PM10: 23.59 µg/m³
  • O3: 0.033 ppm
  • NO2: 9.4 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.