Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Weather in Des Plaines, Illinois

10:24 AM

Now

84° F

Feels Like 95°

Precipitation 7 %

Wind 6 mph

UV Index (0 - 11+) 4

Humidity 69 %

Today

Day 95°

Night 75°

Precipitation 25 %

Wind 8 mph

UV Index (0 - 11+) 6

Des Plaines Weather Forecast Updated

34 minutes ago

Last updated on September 01, 2026 at 9:49 AM

Air Quality in Des Plaines

NOW

45 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 10.8 µg/m³

PM₁₀ 11.46 µg/m³

O₃ 0.029 ppm

NO₂ 1.9 ppb

SO₂ 0.5 ppb

CO 0.13 ppm

NH₃ 1.54 µg/m³

NO 0.83 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 – 10.8 µg/m³

PM₁₀ – 11.46 µg/m³

O₃ – 56.28 µg/m³

NO₂ – 3.62 µg/m³

SO₂ – 1.4 µg/m³

CO – 153.2 µg/m³

NH₃ – 1.54 µg/m³

NO – 0.83 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Des Plaines

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 1 at 1:48AM CDT until September 1 at 9:00PM CDT by NWS Chicago IL

Sep 1, 12:00 PM → Sep 1, 9:00 PM

WHAT: Heat index values of 100 to 110 expected.

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

WHEN: From noon today to 9 PM CDT this evening.

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

ADDITIONAL DETAILS: If showers and thunderstorms move across the
area later this morning, the hot temperatures may not materialize.

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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. Consider altering outdoor plans.

Updated: Sep 1, 9:49 AM Source: NWS Alert