Today | Weather | Thursday, July 2, 2026

Active Weather Warnings

Extreme Heat Warning

Weather in Waukegan, Illinois

10:05 PM

Now

81° F

Feels Like 84°

Precipitation 78 %

Wind 8 mph

Humidity 85 %

Today

Day 86°

Night 73°

Precipitation 99 %

Wind 7 mph

Waukegan Weather Forecast Updated

55 minutes ago

Last updated on July 02, 2026 at 9:09 PM

Air Quality in Waukegan

NOW

27 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5.69 µg/m³

PM₁₀ 6.16 µg/m³

O₃ 0.029 ppm

NO₂ 2.7 ppb

SO₂ 0.6 ppb

CO 0.11 ppm

NH₃ 0.5 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 – 5.69 µg/m³

PM₁₀ – 6.16 µg/m³

O₃ – 57.4 µg/m³

NO₂ – 5.09 µg/m³

SO₂ – 1.51 µg/m³

CO – 123.72 µg/m³

NH₃ – 0.5 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Waukegan

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued July 2 at 1:48PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Jul 2, 1:48 PM → Jul 3, 12:00 AM

WHAT: Dangerously hot conditions with heat index values up to 105
degrees.

WHERE: Portions of north central and northeast Illinois and
northwest Indiana.

WHEN: Until midnight CDT tonight.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

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Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Updated: Jul 2, 9:09 PM Source: NWS Alert