Hourly Weather Forecast for Des Plaines, Illinois

Hourly Weather | Today › Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Des Plaines, Illinois

11 AM

88°

Feels Like 99°

Humidity: 65%

UV Index: 5

Wind: 7 mph

12 PM

90°

Feels Like 102°

Humidity: 61%

UV Index: 6

Wind: 8 mph

1 PM

91°

Feels Like 104°

Humidity: 57%

UV Index: 6

Wind: 9 mph

2 PM

93°

Feels Like 104°

Humidity: 54%

UV Index: 6

Wind: 9 mph

3 PM

93°

Feels Like 102°

Humidity: 52%

UV Index: 5

Wind: 9 mph

4 PM

95°

Feels Like 102°

Humidity: 50%

UV Index: 4

Wind: 9 mph

5 PM

93°

Feels Like 100°

Humidity: 52%

UV Index: 2

Wind: 9 mph

6 PM

91°

Feels Like 99°

Humidity: 56%

UV Index: 1

Wind: 8 mph

7 PM

90°

Feels Like 97°

Humidity: 61%

UV Index: 0

Wind: 7 mph

8 PM

88°

Feels Like 93°

Humidity: 67%

UV Index: 0

Wind: 7 mph

9 PM

84°

Feels Like 91°

Humidity: 72%

UV Index: 0

Wind: 6 mph

10 PM

84°

Feels Like 91°

Humidity: 74%

UV Index: 0

Wind: 7 mph

11 PM

82°

Feels Like 90°

Humidity: 75%

UV Index: 0

Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM

48 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.54 µg/m³
PM₁₀: 12.2 µg/m³
O₃: 0.037 ppm
NO₂: 1.3 ppb
SO₂: 0.6 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM

52 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 13.01 µg/m³
PM₁₀: 13.67 µg/m³
O₃: 0.044 ppm
NO₂: 0.9 ppb
SO₂: 0.7 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

1 PM

55 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 14.18 µg/m³
PM₁₀: 14.85 µg/m³
O₃: 0.049 ppm
NO₂: 0.8 ppb
SO₂: 0.7 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM

49 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 11.36 µg/m³
PM₁₀: 11.94 µg/m³
O₃: 0.053 ppm
NO₂: 0.6 ppb
SO₂: 0.8 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM

50 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 10.12 µg/m³
PM₁₀: 10.68 µg/m³
O₃: 0.053 ppm
NO₂: 0.6 ppb
SO₂: 0.8 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM

50 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.92 µg/m³
PM₁₀: 10.48 µg/m³
O₃: 0.054 ppm
NO₂: 0.7 ppb
SO₂: 0.8 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 10.08 µg/m³
PM₁₀: 10.66 µg/m³
O₃: 0.051 ppm
NO₂: 1.2 ppb
SO₂: 0.8 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.43 µg/m³
PM₁₀: 11.04 µg/m³
O₃: 0.046 ppm
NO₂: 2 ppb
SO₂: 0.7 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.54 µg/m³
PM₁₀: 11.18 µg/m³
O₃: 0.042 ppm
NO₂: 2.8 ppb
SO₂: 0.6 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.44 µg/m³
PM₁₀: 11.1 µg/m³
O₃: 0.039 ppm
NO₂: 3.2 ppb
SO₂: 0.6 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.36 µg/m³
PM₁₀: 11.05 µg/m³
O₃: 0.035 ppm
NO₂: 3.2 ppb
SO₂: 0.5 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.32 µg/m³
PM₁₀: 11.01 µg/m³
O₃: 0.032 ppm
NO₂: 3.2 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.27 µg/m³
PM₁₀: 10.97 µg/m³
O₃: 0.029 ppm
NO₂: 3.2 ppb
SO₂: 0.4 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

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.

+ Read More

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

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Des Plaines

Heat Advisory

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