Hourly Weather | Today Thursday, February 26, 2026
Naperville, Illinois
4 AM
Cloudy Night
25°
Feels Like 25°
7
Humidity: 60%
UV Index: 0
Wind: 5 mph
5 AM
Cloudy Night
25°
Feels Like 25°
7
Humidity: 61%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Night
23°
Feels Like 23°
5
Frost Risk: 89%
Humidity: 62%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
21°
Feels Like 21°
0
Frost Risk: 100%
Humidity: 74%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
25°
Feels Like 27°
0
Frost Risk: 51%
Humidity: 69%
UV Index: 1
Wind: 4 mph
9 AM
Cloudy Weather
28°
Feels Like 30°
0
Humidity: 60%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
32°
Feels Like 34°
0
Humidity: 53%
UV Index: 2
Wind: 6 mph
11 AM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 48%
UV Index: 2
Wind: 7 mph
12 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 46%
UV Index: 2
Wind: 8 mph
1 PM
Cloudy Weather
41°
Feels Like 37°
0
Humidity: 45%
UV Index: 2
Wind: 9 mph
2 PM
Cloudy Weather
43°
Feels Like 39°
0
Humidity: 45%
UV Index: 2
Wind: 10 mph
3 PM
Cloudy Weather
45°
Feels Like 39°
0
Humidity: 46%
UV Index: 2
Wind: 10 mph
4 PM
Cloudy Weather
43°
Feels Like 37°
0
Humidity: 52%
UV Index: 1
Wind: 10 mph
5 PM
Cloudy Weather
41°
Feels Like 37°
0
Humidity: 60%
UV Index: 0
Wind: 8 mph
6 PM
Cloudy Night
39°
Feels Like 36°
0
Humidity: 68%
UV Index: 0
Wind: 7 mph
7 PM
Night
36°
Feels Like 32°
0
Humidity: 76%
UV Index: 0
Wind: 7 mph
8 PM
Night
36°
Feels Like 30°
0
Humidity: 80%
UV Index: 0
Wind: 7 mph
9 PM
Night
36°
Feels Like 30°
0
Humidity: 80%
UV Index: 0
Wind: 7 mph
10 PM
Night
34°
Feels Like 28°
0
Humidity: 82%
UV Index: 0
Wind: 7 mph
11 PM
Night
32°
Feels Like 27°
0
Frost Risk: 51%
Humidity: 85%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.68 µg/m³
  • PM10: 5.27 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.92 µg/m³
  • PM10: 5.5 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.28 µg/m³
  • PM10: 5.89 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.83 µg/m³
  • PM10: 6.56 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.54 µg/m³
  • PM10: 7.49 µg/m³
  • O3: 0.029 ppm
  • NO2: 6 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.07 µg/m³
  • PM10: 8.25 µg/m³
  • O3: 0.029 ppm
  • NO2: 7.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.55 µg/m³
  • PM10: 7.74 µg/m³
  • O3: 0.034 ppm
  • NO2: 6.1 ppb
  • SO2: 1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.85 µg/m³
  • PM10: 6.9 µg/m³
  • O3: 0.036 ppm
  • NO2: 4.7 ppb
  • SO2: 1 ppb
  • CO: 0.19 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: 5.18 µg/m³
  • PM10: 6.05 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.55 µg/m³
  • PM10: 4.14 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.64 µg/m³
  • PM10: 3.1 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.33 µg/m³
  • PM10: 2.76 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.8 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.8 µg/m³
  • PM10: 3.31 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.57 µg/m³
  • PM10: 4.22 µg/m³
  • O3: 0.041 ppm
  • NO2: 5.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 5.15 µg/m³
  • O3: 0.034 ppm
  • NO2: 8.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 5.97 µg/m³
  • O3: 0.030 ppm
  • NO2: 9.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.64 µg/m³
  • PM10: 6.59 µg/m³
  • O3: 0.029 ppm
  • NO2: 9.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6 µg/m³
  • PM10: 6.88 µg/m³
  • O3: 0.031 ppm
  • NO2: 8.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.13 µg/m³
  • PM10: 6.93 µg/m³
  • O3: 0.034 ppm
  • NO2: 6.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.45 µg/m³
  • PM10: 7.24 µg/m³
  • O3: 0.033 ppm
  • NO2: 6.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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