Today | Weather | Sunday, August 9, 2026

Active Weather Warnings

Weather in Rockford, Illinois

10:04 PM

Now

73° F

Feels Like 75°

Precipitation 47 %

Wind 7 mph

Humidity 88 %

Today

Day 82°

Night 68°

Precipitation 55 %

Wind 5 mph

Rockford Weather Forecast Updated

59 minutes ago

Last updated on August 09, 2026 at 9:05 PM

Weather Forecast History

Last Year's Weather on This Day (August 9, 2025)

Day

90°

Night

70°

Wind

7 mph

Precipitation

92 %

Air Quality in Rockford

NOW

44 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 10.54 µg/m³

PM₁₀ 10.83 µg/m³

O₃ 0.029 ppm

NO₂ 1.9 ppb

SO₂ 0.8 ppb

CO 0.12 ppm

NH₃ 0.86 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 10.54 µg/m³

PM₁₀ – 10.83 µg/m³

O₃ – 56.1 µg/m³

NO₂ – 3.49 µg/m³

SO₂ – 2.22 µg/m³

CO – 139.23 µg/m³

NH₃ – 0.86 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Rockford

Severe Future Possible

Severe Thunderstorm Watch

Severe Thunderstorm Watch issued August 9 at 8:44PM CDT until August 10 at 4:00AM CDT by NWS Chicago IL

Aug 9, 8:44 PM → Aug 10, 4:00 AM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
550 IN EFFECT UNTIL 4 AM CDT /5 AM EDT/ MONDAY FOR THE FOLLOWING
AREAS

IN ILLINOIS THIS WATCH INCLUDES 18 COUNTIES

IN CENTRAL ILLINOIS

LIVINGSTON

IN EAST CENTRAL ILLINOIS

FORD IROQUOIS

IN NORTH CENTRAL ILLINOIS

BOONE DE KALB LA SALLE
LEE OGLE WINNEBAGO

IN NORTHEAST ILLINOIS

COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL

IN INDIANA THIS WATCH INCLUDES 5 COUNTIES

IN NORTHWEST INDIANA

BENTON JASPER LAKE IN
NEWTON PORTER

THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM,
CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DEMOTTE,
DIXON, DOWNERS GROVE, DWIGHT, ELGIN, EVANSTON, FAIRBURY, FOWLER,
GARY, GIBSON CITY, GILMAN, GURNEE, HAMMOND, JOLIET, KANKAKEE,
KENTLAND, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MOROCCO, MORRIS, MUNDELEIN,
NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA,
OXFORD, PARK FOREST, PAXTON, PLANO, PONTIAC, PORTAGE, RENSSELAER,
ROCHELLE, ROCKFORD, ROSELAWN, SCHAUMBURG, STREATOR, SYCAMORE,
VALPARAISO, WATSEKA, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK,
AND YORKVILLE.

Updated: Aug 9, 9:05 PM Source: NWS Alert

Severe Future Possible

Flood Watch

Flood Watch issued August 9 at 9:02PM CDT until August 10 at 7:00AM CDT by NWS Chicago IL

Aug 9, 9:02 PM → Aug 10, 7:00 AM

WHAT: Flash flooding caused by excessive rainfall is possible.

WHERE: Portions of Illinois, including the following counties,
Boone, Ford, Iroquois, La Salle, Lee, Livingston, Ogle and
Winnebago and northwest Indiana, including the following county,
Benton.

WHEN: Until 7 AM CDT /8 AM EDT/ Monday.

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

ADDITIONAL DETAILS:
- Showers and thunderstorms are developing along a stalled surface
front. Atmospheric conditions are favorable for heavy rainfall
with localized rainfall rates exceeding 2 inches per hour late
this evening through the overnight. Slow storm motion and the
potential for multiple rounds of rainfall will increase the
threat for flooding in some areas.
- 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.