Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Weather in Gary, Indiana

10:24 AM

Now

82° F

Feels Like 97°

Precipitation 54 %

Wind 5 mph

UV Index (0 - 11+) 4

Humidity 86 %

Today

Day 97°

Night 73°

Precipitation 55 %

Wind 7 mph

UV Index (0 - 11+) 6

Gary Weather Forecast Updated

27 minutes ago

Last updated on September 01, 2026 at 9:57 AM

Air Quality in Gary

NOW

53 AQI

Moderate air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 13.36 µg/m³

PM₁₀ 14.04 µg/m³

O₃ 0.037 ppm

NO₂ 1.3 ppb

SO₂ 0.7 ppb

CO 0.15 ppm

NH₃ 1.55 µg/m³

NO 0.48 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 13.36 µg/m³

PM₁₀ – 14.04 µg/m³

O₃ – 72.33 µg/m³

NO₂ – 2.44 µg/m³

SO₂ – 1.77 µg/m³

CO – 171.19 µg/m³

NH₃ – 1.55 µg/m³

NO – 0.48 µg/m³

View Hourly Air Quality Forecast

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.

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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, 9:57 AM Source: NWS Alert