❮
Today Hourly 7 days 30 days Air Quality
❯
Hourly Weather | Today › Saturday, September 19, 2026
Active Weather Warnings
Rockford, Illinois
5 AM
Stormy Weather
64°
Feels Like 61°
67
Humidity: 97%
UV Index: 0
Wind: 7 mph
6 AM
Stormy Weather
64°
Feels Like 59°
75
Humidity: 95%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
64°
Feels Like 64°
49
Humidity: 96%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
64°
Feels Like 64°
49
Humidity: 96%
UV Index: 0
Wind: 7 mph
9 AM
Cloudy Weather
66°
Feels Like 66°
49
Humidity: 96%
UV Index: 0
Wind: 8 mph
10 AM
Rainy Weather
68°
Feels Like 64°
65
Humidity: 93%
UV Index: 1
Wind: 8 mph
11 AM
Rainy Weather
70°
Feels Like 68°
90
Humidity: 91%
UV Index: 1
Wind: 8 mph
12 PM
Rainy Weather
72°
Feels Like 72°
90
Humidity: 92%
UV Index: 1
Wind: 7 mph
1 PM
Rainy Weather
73°
Feels Like 73°
90
Humidity: 90%
UV Index: 1
Wind: 7 mph
2 PM
Cloudy Weather
75°
Feels Like 81°
40
Humidity: 88%
UV Index: 1
Wind: 7 mph
3 PM
Cloudy Weather
75°
Feels Like 81°
34
Humidity: 87%
UV Index: 1
Wind: 7 mph
4 PM
Cloudy Weather
77°
Feels Like 82°
40
Humidity: 84%
UV Index: 1
Wind: 7 mph
5 PM
Stormy Weather
75°
Feels Like 75°
74
Humidity: 87%
UV Index: 0
Wind: 7 mph
6 PM
Stormy Weather
75°
Feels Like 75°
74
Humidity: 89%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Weather
73°
Feels Like 77°
49
Humidity: 94%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 97%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 98%
UV Index: 0
Wind: 6 mph
10 PM
Stormy Weather
72°
Feels Like 70°
65
Humidity: 98%
UV Index: 0
Wind: 6 mph
11 PM
Stormy Weather
70°
Feels Like 68°
75
Humidity: 96%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 10.43 µg/m³
  • PM10: 10.82 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.4 µg/m³
  • PM10: 11.81 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

7 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.27 µg/m³
  • PM10: 12.74 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.4 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.

8 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.61 µg/m³
  • PM10: 13.13 µg/m³
  • O3: 0.032 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.

9 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.27 µg/m³
  • PM10: 12.83 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.8 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.

10 AM
48 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.54 µg/m³
  • PM10: 12.12 µg/m³
  • O3: 0.031 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.

11 AM
45 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.83 µg/m³
  • PM10: 11.4 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

12 PM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.25 µg/m³
  • PM10: 10.8 µg/m³
  • O3: 0.036 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.

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

Pollutant Concentrations:

  • PM2.5: 9.79 µg/m³
  • PM10: 10.32 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.04 µg/m³
  • PM10: 8.49 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.62 µg/m³
  • PM10: 7.01 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.85 µg/m³
  • PM10: 6.21 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.4 µg/m³
  • PM10: 5.71 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 5.56 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.28 µg/m³
  • PM10: 5.58 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.24 µg/m³
  • PM10: 5.54 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 PM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.21 µg/m³
  • PM10: 5.53 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 5.49 µg/m³
  • O3: 0.022 ppm
  • NO2: 3.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
21 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 5.32 µg/m³
  • O3: 0.019 ppm
  • NO2: 3.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Rockford

Severe Future Possible

Flood Watch

Flood Watch issued September 19 at 3:39AM CDT until September 19 at 1:00PM CDT by NWS Chicago IL
Sep 19, 3:39 AM → Sep 19, 1:00 PM
WHAT: Flash flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.

WHEN: Until 1 PM CDT this afternoon.

IMPACTS: Creeks and streams may rise out of their banks. Roads and
streets may be flooded.

ADDITIONAL DETAILS:
- Showers and thunderstorms will produce heavy rain this morning
which may cause localized flash flooding. Additional showers and
thunderstorms may produce heavy rain and localized flash flooding
tonight when another flood watch for flash flooding may be
needed.
- http://www.weather.gov/safety/flood
+ Read More
A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop.
Updated: Sep 19, 3:51 AM Source: NWS Alert
Minor Expected Likely

Flood Advisory

Flood Advisory issued September 19 at 3:29AM CDT until September 19 at 9:00AM CDT by NWS Chicago IL
Sep 19, 3:29 AM → Sep 19, 9:00 AM
WHAT: Flooding caused by excessive rainfall is expected.

WHERE: Boone County in north central Illinois...
Winnebago County in north central Illinois...
Lake IL County in northeastern Illinois...
McHenry County in northeastern Illinois...

WHEN: Until 900 AM CDT.

IMPACTS: Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas.

ADDITIONAL DETAILS:
- At 324 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms producing rainfall amounts in excess of one inch
per hour. Minor flooding is ongoing or expected to begin shortly
in the advisory area. One to two inches of rain has fallen.
- Additional rainfall amounts of one to two inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Rockford, Waukegan, Buffalo Grove, Crystal Lake, Wheeling, North
Chicago, Gurnee, Mundelein, Algonquin, Highland Park, Lake in the
Hills, Round Lake Beach, McHenry, Belvidere, Vernon Hills,
Woodstock, Zion, Huntley, Loves Park, Machesney Park, Grayslake
and Libertyville.
- http://www.weather.gov/safety/flood
+ Read More
A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
Updated: Sep 19, 3:51 AM Source: NWS Alert

Explore U.S. Weather Trends

❄️ Coldest Cities in the U.S. – Live Temperature Rankings 🔥 Hottest Cities Today – Real-Time Heat Observations ⚠️ Active Weather Alerts – Warnings, Watches & Advisories 🌪️ Windiest Cities – Highest Sustained Wind Speeds 🌫️ Worst Air Quality – Cities with the Highest AQI 🍃 Best Air Quality – Cities with the Lowest AQI