Hourly Weather | Today Wednesday, March 18, 2026
Gary, Indiana
5 AM
Snowy Weather
27°
Feels Like
56
Humidity: 87%
UV Index: 0
Wind: 16 mph
6 AM
Cloudy Weather
27°
Feels Like 10°
49
Humidity: 83%
UV Index: 0
Wind: 16 mph
7 AM
Snowy Weather
27°
Feels Like
63
Humidity: 86%
UV Index: 0
Wind: 16 mph
8 AM
Snowy Weather
27°
Feels Like 10°
65
Humidity: 84%
UV Index: 0
Wind: 15 mph
9 AM
Snowy Weather
28°
Feels Like 12°
65
Humidity: 85%
UV Index: 0
Wind: 16 mph
10 AM
Snowy Weather
30°
Feels Like 14°
65
Humidity: 81%
UV Index: 1
Wind: 16 mph
11 AM
Cloudy Weather
32°
Feels Like 19°
40
Humidity: 75%
UV Index: 1
Wind: 17 mph
12 PM
Cloudy Weather
36°
Feels Like 23°
34
Humidity: 71%
UV Index: 1
Wind: 17 mph
1 PM
Cloudy Weather
37°
Feels Like 27°
27
Humidity: 66%
UV Index: 2
Wind: 16 mph
2 PM
Cloudy Weather
39°
Feels Like 34°
15
Humidity: 63%
UV Index: 2
Wind: 13 mph
3 PM
Cloudy Weather
43°
Feels Like 37°
15
Humidity: 63%
UV Index: 2
Wind: 12 mph
4 PM
Cloudy Weather
43°
Feels Like 39°
15
Humidity: 63%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
45°
Feels Like 41°
15
Humidity: 62%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
41°
Feels Like 37°
15
Humidity: 71%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
39°
Feels Like 36°
10
Humidity: 82%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 91%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 99%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
34°
Feels Like 34°
0
Humidity: 99%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
32°
Feels Like 32°
0
Humidity: 98%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.25 µg/m³
  • PM10: 3.41 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.5 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.46 µg/m³
  • PM10: 3.67 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.83 µg/m³
  • PM10: 4.15 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.6 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.36 µg/m³
  • PM10: 4.83 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.9 ppb
  • SO2: 1.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.81 µg/m³
  • PM10: 5.45 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.7 ppb
  • SO2: 1.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.16 µg/m³
  • PM10: 5.91 µg/m³
  • O3: 0.048 ppm
  • NO2: 3 ppb
  • SO2: 2.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.38 µg/m³
  • PM10: 6.16 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.7 ppb
  • SO2: 1.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

12 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.74 µg/m³
  • PM10: 6.46 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.1 ppb
  • SO2: 1.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

1 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.53 µg/m³
  • PM10: 7.21 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

2 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.75 µg/m³
  • PM10: 8.45 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.9 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.

3 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.65 µg/m³
  • PM10: 9.38 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.8 ppb
  • SO2: 0.8 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.

4 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.2 µg/m³
  • PM10: 9.98 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.7 ppb
  • SO2: 0.8 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.

5 PM
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.23 µg/m³
  • PM10: 10.09 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

6 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.46 µg/m³
  • PM10: 10.46 µg/m³
  • O3: 0.052 ppm
  • NO2: 3.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

7 PM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.04 µg/m³
  • PM10: 11.21 µg/m³
  • O3: 0.045 ppm
  • NO2: 5.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.12 µg/m³
  • PM10: 12.5 µg/m³
  • O3: 0.040 ppm
  • NO2: 7.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

9 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.39 µg/m³
  • PM10: 13.96 µg/m³
  • O3: 0.037 ppm
  • NO2: 7.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

10 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.83 µg/m³
  • PM10: 15.55 µg/m³
  • O3: 0.034 ppm
  • NO2: 8 ppb
  • SO2: 0.2 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

11 PM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.8 µg/m³
  • PM10: 16.59 µg/m³
  • O3: 0.032 ppm
  • NO2: 7.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.23 ppm

Health Recommendations:

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