Hourly Weather Forecast for Naperville, Illinois

Hourly Weather | Today › Monday, June 29, 2026

Active Weather Warnings

Heat Advisory

Naperville, Illinois

9 PM

84°

Feels Like 93°

Humidity: 77%

UV Index: 0

Wind: 9 mph

10 PM

81°

Feels Like 90°

Humidity: 85%

UV Index: 0

Wind: 8 mph

11 PM

81°

Feels Like 90°

Humidity: 87%

UV Index: 0

Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 PM

27 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.18 µg/m³
PM₁₀: 8.32 µg/m³
O₃: 0.029 ppm
NO₂: 1.3 ppb
SO₂: 0.6 ppb
CO: 0.11 ppm

Health Recommendations:

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

10 PM

25 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.97 µg/m³
PM₁₀: 8.1 µg/m³
O₃: 0.027 ppm
NO₂: 1.3 ppb
SO₂: 0.5 ppb
CO: 0.11 ppm

Health Recommendations:

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

11 PM

25 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.94 µg/m³
PM₁₀: 8.05 µg/m³
O₃: 0.026 ppm
NO₂: 1.4 ppb
SO₂: 0.6 ppb
CO: 0.11 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 Naperville

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 29 at 3:13PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Jun 29, 3:13 PM → Jul 1, 10:00 PM

WHAT: Heat index values around 105 expected each afternoon

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

WHEN: Until 10 PM CDT /11 PM EDT/ Wednesday.

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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Updated: Jun 29, 7:23 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Naperville

Heat Advisory

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