Hourly Weather | Today Wednesday, March 18, 2026
Rockford, Illinois
8 AM
Cloudy Weather
25°
Feels Like
7
Frost Risk: 74%
Humidity: 82%
UV Index: 0
Wind: 17 mph
9 AM
Cloudy Weather
27°
Feels Like 10°
4
Frost Risk: 74%
Humidity: 86%
UV Index: 1
Wind: 17 mph
10 AM
Cloudy Weather
28°
Feels Like 14°
4
Humidity: 83%
UV Index: 1
Wind: 17 mph
11 AM
Cloudy Weather
30°
Feels Like 18°
4
Humidity: 80%
UV Index: 2
Wind: 17 mph
12 PM
Cloudy Weather
34°
Feels Like 21°
4
Humidity: 76%
UV Index: 2
Wind: 17 mph
1 PM
Cloudy Weather
36°
Feels Like 25°
2
Humidity: 74%
UV Index: 3
Wind: 16 mph
2 PM
Cloudy Weather
36°
Feels Like 32°
0
Humidity: 72%
UV Index: 3
Wind: 10 mph
3 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 71%
UV Index: 3
Wind: 10 mph
4 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 68%
UV Index: 2
Wind: 10 mph
5 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 72%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
36°
Feels Like 32°
0
Humidity: 74%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
34°
Feels Like 30°
0
Humidity: 77%
UV Index: 0
Wind: 6 mph
8 PM
Rainy Weather
32°
Feels Like 28°
51
Humidity: 82%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Weather
30°
Feels Like 30°
47
Humidity: 88%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Weather
28°
Feels Like 30°
34
Humidity: 92%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Weather
28°
Feels Like 28°
15
Frost Risk: 72%
Humidity: 98%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.64 µg/m³
  • PM10: 4.99 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.

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

Pollutant Concentrations:

  • PM2.5: 4.64 µg/m³
  • PM10: 5.1 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.3 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
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.94 µg/m³
  • PM10: 5.51 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.1 ppb
  • SO2: 1.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 6.71 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.8 ppb
  • SO2: 1.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.01 µg/m³
  • PM10: 8.86 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

1 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.05 µg/m³
  • PM10: 12.02 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

2 PM
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.12 µg/m³
  • PM10: 16.24 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.8 ppb
  • SO2: 0.6 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.

3 PM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.17 µg/m³
  • PM10: 20.43 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.3 ppb
  • SO2: 0.5 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.

4 PM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.33 µg/m³
  • PM10: 23.7 µg/m³
  • O3: 0.055 ppm
  • NO2: 2.9 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 24.6 µg/m³
  • PM10: 26.07 µg/m³
  • O3: 0.056 ppm
  • NO2: 4.1 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 25.42 µg/m³
  • PM10: 26.95 µg/m³
  • O3: 0.054 ppm
  • NO2: 6.1 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.

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

Pollutant Concentrations:

  • PM2.5: 25.24 µg/m³
  • PM10: 26.81 µg/m³
  • O3: 0.050 ppm
  • NO2: 8.3 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 24.58 µg/m³
  • PM10: 26.18 µg/m³
  • O3: 0.046 ppm
  • NO2: 8.4 ppb
  • SO2: 0.3 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
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.76 µg/m³
  • PM10: 25.35 µg/m³
  • O3: 0.044 ppm
  • NO2: 7.7 ppb
  • SO2: 0.2 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
73 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.66 µg/m³
  • PM10: 24.19 µg/m³
  • O3: 0.043 ppm
  • NO2: 6.8 ppb
  • SO2: 0.2 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.

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

Pollutant Concentrations:

  • PM2.5: 21.3 µg/m³
  • PM10: 22.75 µg/m³
  • O3: 0.041 ppm
  • NO2: 6.1 ppb
  • SO2: 0.1 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.