Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Weather in Waukegan, Illinois

10:25 AM

Now

82° F

Feels Like 95°

Precipitation 7 %

Wind 6 mph

UV Index (0 - 11+) 3

Humidity 74 %

Today

Day 91°

Night 73°

Precipitation 25 %

Wind 7 mph

UV Index (0 - 11+) 5

Waukegan Weather Forecast Updated

11 minutes ago

Last updated on September 01, 2026 at 10:14 AM

Air Quality in Waukegan

NOW

42 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 10.2 µg/m³

PM₁₀ 10.89 µg/m³

O₃ 0.026 ppm

NO₂ 2.2 ppb

SO₂ 0.5 ppb

CO 0.13 ppm

NH₃ 1.38 µg/m³

NO 0.92 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 – 10.2 µg/m³

PM₁₀ – 10.89 µg/m³

O₃ – 50.19 µg/m³

NO₂ – 4.22 µg/m³

SO₂ – 1.34 µg/m³

CO – 151.24 µg/m³

NH₃ – 1.38 µg/m³

NO – 0.92 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Waukegan

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 1 at 9:54AM CDT until September 1 at 9:00PM CDT by NWS Chicago IL

Sep 1, 12:00 PM → Sep 1, 9:00 PM

WHAT: Peak heat indices of 100 to 105 degrees expected today and
Wednesday afternoon.

WHERE: Boone, De Kalb, Lee, Ogle, Winnebago, Central Cook, DuPage,
Kane, Lake IL, McHenry, and Northern Cook Counties.

WHEN: Until 9 PM CDT this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Updated: Sep 1, 10:14 AM Source: NWS Alert