Today | Weather | Monday, September 21, 2026
Active Weather Warnings

Weather in Gary, Indiana

12:54 PM
Now
Cloudy Weather
64° F
Feels Like 63°
Precipitation 40 %
Wind 15 mph
UV Index (0 - 11+) 2
Humidity 84 %
Today
Rainy Weather
Day 64°
Night 55°
Precipitation 65 %
Wind 15 mph
UV Index (0 - 11+) 2

Gary Weather Forecast Updated

26 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Sunny with a Chance of Thunderstorms

Day

84°

Night

64°

Wind

6 mph

UV Index

50

Precipitation

55 %

Air Quality in Gary

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.85 µg/m³
PM10 3.11 µg/m³
O3 0.028 ppm
NO2 2.1 ppb
SO2 0.6 ppb
CO 0.18 ppm
NH3 0.64 µg/m³
NO 0.47 µg/m³
PM2.5 – 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)
PM2.52.85 µg/m³
PM103.11 µg/m³
O355.07 µg/m³
NO24.02 µg/m³
SO21.55 µg/m³
CO200.8 µg/m³
NH30.64 µg/m³
NO0.47 µg/m³

Weather Alerts and Warnings for Gary

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued September 21 at 9:25AM CDT until September 23 at 1:00PM CDT by NWS Chicago IL
Sep 21, 9:25 AM Sep 23, 1:00 PM
WHAT: High wave action and dangerous currents expected at Lake
Michigan beaches. Waves 5 to 8 ft expected.

WHERE: Lake County IN.

WHEN: Through Wednesday afternoon.

IMPACTS: Swimming conditions will be life threatening,
especially for inexperienced swimmers.
+ Read More
Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.
Updated: Sep 21, 12:27 PM Source: NWS Alert