Hourly Weather | Today Monday, September 21, 2026
Indianapolis, Indiana
3 PM
Cloudy Weather
64°
Feels Like 64°
20
Humidity: 79%
UV Index: 1
Wind: 9 mph
4 PM
Cloudy Weather
66°
Feels Like 64°
20
Humidity: 76%
UV Index: 1
Wind: 10 mph
5 PM
Cloudy Weather
66°
Feels Like 64°
20
Humidity: 73%
UV Index: 1
Wind: 10 mph
6 PM
Cloudy Weather
66°
Feels Like 63°
20
Humidity: 74%
UV Index: 0
Wind: 10 mph
7 PM
Cloudy Weather
64°
Feels Like 61°
15
Humidity: 78%
UV Index: 0
Wind: 10 mph
8 PM
Cloudy Weather
63°
Feels Like 59°
4
Humidity: 83%
UV Index: 0
Wind: 9 mph
9 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 85%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 86%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Weather
61°
Feels Like 57°
4
Humidity: 85%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 7.37 µg/m³
  • PM10: 7.72 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.35 µg/m³
  • PM10: 7.65 µg/m³
  • O3: 0.041 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

5 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.9 µg/m³
  • PM10: 7.18 µg/m³
  • O3: 0.043 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.21 µg/m³
  • PM10: 6.47 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.37 µg/m³
  • PM10: 5.63 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.52 µg/m³
  • PM10: 4.77 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.76 µg/m³
  • PM10: 3.99 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.25 µg/m³
  • PM10: 3.47 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.92 µg/m³
  • PM10: 3.16 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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