Hourly Weather | Today Wednesday, March 18, 2026
Active Weather Warnings
Indianapolis, Indiana
8 AM
Snowy Weather
25°
Feels Like 12°
48
Humidity: 73%
UV Index: 0
Wind: 12 mph
9 AM
Snowy Weather
25°
Feels Like 12°
48
Humidity: 75%
UV Index: 0
Wind: 12 mph
10 AM
Cloudy Weather
27°
Feels Like 16°
40
Humidity: 74%
UV Index: 1
Wind: 13 mph
11 AM
Snowy Weather
28°
Feels Like 18°
51
Humidity: 73%
UV Index: 1
Wind: 13 mph
12 PM
Cloudy Weather
32°
Feels Like 21°
44
Humidity: 71%
UV Index: 1
Wind: 13 mph
1 PM
Cloudy Weather
34°
Feels Like 25°
31
Humidity: 67%
UV Index: 2
Wind: 13 mph
2 PM
Cloudy Weather
37°
Feels Like 30°
20
Humidity: 63%
UV Index: 3
Wind: 13 mph
3 PM
Cloudy Weather
39°
Feels Like 36°
20
Humidity: 59%
UV Index: 3
Wind: 13 mph
4 PM
Cloudy Weather
43°
Feels Like 37°
20
Humidity: 56%
UV Index: 3
Wind: 13 mph
5 PM
Cloudy Weather
45°
Feels Like 37°
20
Humidity: 56%
UV Index: 2
Wind: 12 mph
6 PM
Cloudy Weather
46°
Feels Like 39°
20
Humidity: 55%
UV Index: 1
Wind: 10 mph
7 PM
Cloudy Weather
45°
Feels Like 37°
13
Humidity: 61%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
43°
Feels Like 37°
0
Humidity: 69%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
39°
Feels Like 36°
0
Humidity: 74%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 78%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
37°
Feels Like 34°
0
Humidity: 81%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.21 µg/m³
  • PM10: 6.02 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.3 ppb
  • SO2: 3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.3 ppb
  • SO2: 2.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.49 µg/m³
  • PM10: 5.19 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.6 ppb
  • SO2: 2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.03 µg/m³
  • PM10: 4.77 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.6 ppb
  • SO2: 1.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.71 µg/m³
  • PM10: 4.55 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.5 ppb
  • SO2: 1.8 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: 3.65 µg/m³
  • PM10: 4.62 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.3 ppb
  • SO2: 1.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.96 µg/m³
  • PM10: 5.05 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.2 ppb
  • SO2: 2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

3 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.68 µg/m³
  • PM10: 5.84 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.1 ppb
  • SO2: 2.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

4 PM
50 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.32 µg/m³
  • PM10: 6.46 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.8 ppb
  • SO2: 2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.55 µg/m³
  • PM10: 6.6 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.7 ppb
  • SO2: 1.9 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.

6 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.47 µg/m³
  • PM10: 6.45 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.8 ppb
  • SO2: 1.8 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.

7 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.04 µg/m³
  • PM10: 6.02 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.4 ppb
  • SO2: 1.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.91 µg/m³
  • PM10: 5.93 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 5.99 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.09 µg/m³
  • PM10: 6.22 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

11 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.35 µg/m³
  • PM10: 6.56 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Indianapolis

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued March 18 at 5:53AM EDT by NWS Indianapolis IN
Mar 18, 5:53 AM Mar 18, 8:30 AM
Areas of light snow will continue across portions of central
Indiana through the morning rush hour.

If traveling, exercise caution and be prepared for slick spots on
roads; especially bridges, overpasses, and untreated surfaces.
Updated: Mar 18, 6:38 AM Source: NWS Alert