Hourly Weather Forecast for Gary, Indiana

Hourly Weather | Today › Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Gary, Indiana

11 AM

86°

Feels Like 100°

Humidity: 73%

UV Index: 5

Wind: 7 mph

12 PM

91°

Feels Like 108°

Humidity: 65%

UV Index: 6

Wind: 8 mph

1 PM

93°

Feels Like 108°

Humidity: 62%

UV Index: 6

Wind: 8 mph

2 PM

93°

Feels Like 108°

Humidity: 56%

UV Index: 6

Wind: 9 mph

3 PM

97°

Feels Like 108°

Humidity: 50%

UV Index: 4

Wind: 9 mph

4 PM

95°

Feels Like 106°

Humidity: 53%

UV Index: 3

Wind: 9 mph

5 PM

93°

Feels Like 104°

Humidity: 55%

UV Index: 2

Wind: 8 mph

6 PM

91°

Feels Like 102°

Humidity: 61%

UV Index: 1

Wind: 7 mph

7 PM

90°

Feels Like 100°

Humidity: 67%

UV Index: 0

Wind: 7 mph

8 PM

88°

Feels Like 99°

Humidity: 70%

UV Index: 0

Wind: 6 mph

9 PM

86°

Feels Like 99°

Humidity: 78%

UV Index: 0

Wind: 5 mph

10 PM

84°

Feels Like 97°

Humidity: 83%

UV Index: 0

Wind: 5 mph

11 PM

82°

Feels Like 95°

Humidity: 88%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM

54 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 13.85 µg/m³
PM₁₀: 14.52 µg/m³
O₃: 0.043 ppm
NO₂: 0.9 ppb
SO₂: 0.7 ppb
CO: 0.14 ppm

Health Recommendations:

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

12 PM

55 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 14.28 µg/m³
PM₁₀: 14.93 µg/m³
O₃: 0.048 ppm
NO₂: 0.7 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

56 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 14.59 µg/m³
PM₁₀: 15.24 µg/m³
O₃: 0.052 ppm
NO₂: 0.6 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.

2 PM

55 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 11.57 µg/m³
PM₁₀: 12.16 µg/m³
O₃: 0.056 ppm
NO₂: 0.4 ppb
SO₂: 0.7 ppb
CO: 0.11 ppm

Health Recommendations:

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

3 PM

54 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.66 µg/m³
PM₁₀: 10.2 µg/m³
O₃: 0.055 ppm
NO₂: 0.3 ppb
SO₂: 0.5 ppb
CO: 0.10 ppm

Health Recommendations:

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

4 PM

53 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.23 µg/m³
PM₁₀: 9.77 µg/m³
O₃: 0.055 ppm
NO₂: 0.4 ppb
SO₂: 0.5 ppb
CO: 0.10 ppm

Health Recommendations:

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

5 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.69 µg/m³
PM₁₀: 10.26 µg/m³
O₃: 0.051 ppm
NO₂: 0.8 ppb
SO₂: 0.5 ppb
CO: 0.11 ppm

Health Recommendations:

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

6 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.45 µg/m³
PM₁₀: 11.06 µg/m³
O₃: 0.043 ppm
NO₂: 1.7 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

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

7 PM

45 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.91 µg/m³
PM₁₀: 11.57 µg/m³
O₃: 0.038 ppm
NO₂: 2.7 ppb
SO₂: 0.3 ppb
CO: 0.12 ppm

Health Recommendations:

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

8 PM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.13 µg/m³
PM₁₀: 11.83 µg/m³
O₃: 0.034 ppm
NO₂: 3.3 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

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

9 PM

47 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.38 µg/m³
PM₁₀: 12.12 µg/m³
O₃: 0.030 ppm
NO₂: 3.5 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

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

10 PM

48 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.61 µg/m³
PM₁₀: 12.37 µg/m³
O₃: 0.026 ppm
NO₂: 3.6 ppb
SO₂: 0.2 ppb
CO: 0.14 ppm

Health Recommendations:

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

11 PM

49 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.67 µg/m³
PM₁₀: 12.42 µg/m³
O₃: 0.023 ppm
NO₂: 3.5 ppb
SO₂: 0.2 ppb
CO: 0.14 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 Gary

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: Heat index values of 100 to 110 expected.

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

WHEN: For the first Heat Advisory, until 9 PM CDT /10 PM EDT/ this
evening. For the second Heat Advisory, from noon CDT /1 PM EDT/ to
9 PM CDT /10 PM EDT/ Wednesday.

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

+ 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, 9:57 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Gary

Heat Advisory

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