Today | Weather | Monday, July 20, 2026
Active Weather Warnings

Weather in Rockford, Illinois

04:54 PM
Now
Sunny with a Chance of Thunderstorms
86° F
Feels Like 86°
Precipitation 66 %
Wind 13 mph
UV Index (0 - 11+) 3
Humidity 54 %
Today
Stormy Weather
Day 86°
Night 70°
Precipitation 100 %
Wind 10 mph
UV Index (0 - 11+) 5

Rockford Weather Forecast Updated

7 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 20, 2025)
Cloudy Night

Day

84°

Night

63°

Wind

5 mph

Precipitation

7 %

Air Quality in Rockford

NOW
57 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 15.31 µg/m³
PM10 15.51 µg/m³
O3 0.053 ppm
NO2 0.6 ppb
SO2 0.7 ppb
CO 0.26 ppm
NH3 0.35 µg/m³
NO 0.12 µg/m³
PM2.5 – 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.515.31 µg/m³
PM1015.51 µg/m³
O3103.12 µg/m³
NO21.08 µg/m³
SO21.94 µg/m³
CO301.58 µg/m³
NH30.35 µg/m³
NO0.12 µg/m³

Weather Alerts and Warnings for Rockford

Air Quality Alert

Air Quality Alert issued July 19 at 12:50PM CDT by NWS Chicago IL
Jul 19, 12:50 PM Jul 21, 12:00 AM
The Illinois Environmental Protection Agency has issued an Areawide
Air Pollution Action Day for Monday July 20th for portions of
Illinois. This is in addition to the ongoing Areawide Air Pollution
Action Day in effect today July 19th for the same areas.

An Areawide Air Pollution Action Day is declared when weather
conditions are such that widespread ozone and or particulate levels
are forecast to be at or above the Unhealthy for Sensitive Groups
(USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area are
likely to see smoke/particulates to a varying degree and duration
today and Monday with smoke likely decreasing from southwest to
northeast through the day Monday. Those with air quality concerns or
anyone in Illinois with outdoor plans is encouraged to check current
NowCast readings or sign up for EnviroFlash alerts on AirNow. gov.
Before going outside, checking the NowCast AQI will help identify
periods of both poor and cleaner air quality regardless of the level
of the daily 24-hour AQI forecast.

AQI Category Guidance Unhealthy for Sensitive Groups (USG) - Members
of sensitive groups may experience health effects. The general
public is less likely to be affected. Sensitive groups: Make outdoor
activities shorter and less intense. Its OK to be active outdoors,
but take more breaks. Watch for symptoms such as coughing or
shortness of breath. People with asthma: Follow your asthma action
plan and keep quick relief medicine handy. People with heart disease:
Symptoms such as palpitations, shortness of breath, or unusual
fatigue may indicate a serious problem. If you have any of these,
contact your health care provider. Unhealthy - Sensitive groups:
Avoid long or intense outdoor activities. Consider rescheduling or
moving activities indoors. Everyone else: Reduce long or intense
activities. Take more breaks during outdoor activities.


Media Contact... Illinois EPA
Updated: Jul 20, 4:47 PM Source: NWS Alert