Today | Weather | Monday, September 21, 2026

Active Weather Warnings

Beach Hazards Statement

Weather in Waukegan, Illinois

12:56 PM

Now

61° F

Feels Like 57°

Precipitation 61 %

Wind 15 mph

UV Index (0 - 11+) 1

Humidity 80 %

Today

Day 63°

Night 55°

Precipitation 89 %

Wind 16 mph

UV Index (0 - 11+) 1

Waukegan Weather Forecast Updated

10 minutes ago

Last updated on September 21, 2026 at 12:46 PM

Weather Forecast History

Last Year's Weather on This Day (September 21, 2025)

Day

79°

Night

63°

Wind

5 mph

Precipitation

96 %

Air Quality in Waukegan

NOW

23 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.07 µg/m³

PM₁₀ 2.54 µg/m³

O₃ 0.024 ppm

NO₂ 3.9 ppb

SO₂ 1.2 ppb

CO 0.17 ppm

NH₃ 0.37 µg/m³

NO 0.9 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 – 2.07 µg/m³

PM₁₀ – 2.54 µg/m³

O₃ – 47.82 µg/m³

NO₂ – 7.27 µg/m³

SO₂ – 3.04 µg/m³

CO – 197.24 µg/m³

NH₃ – 0.37 µg/m³

NO – 0.9 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Waukegan

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued September 21 at 9:25AM CDT until September 23 at 7:00PM CDT by NWS Chicago IL

Sep 21, 9:25 AM → Sep 23, 7:00 PM

WHAT: High wave action and dangerous currents expected at Lake
Michigan beaches. Waves 5 to 8 ft expected.

WHERE: Lake IL, Northern Cook and Central Cook Counties.

WHEN: Through Wednesday evening.

IMPACTS: Swimming conditions will be life threatening,
especially for inexperienced swimmers.

+ Read More

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

Updated: Sep 21, 12:46 PM Source: NWS Alert