Hourly Weather Forecast for Indianapolis, Indiana

Hourly Weather | Today › Wednesday, August 12, 2026

Active Weather Warnings

Flood Watch

Indianapolis, Indiana

8 AM

72°

Feels Like 75°

Humidity: 95%

UV Index: 1

Wind: 6 mph

9 AM

73°

Feels Like 73°

Humidity: 94%

UV Index: 1

Wind: 7 mph

10 AM

75°

Feels Like 82°

Humidity: 89%

UV Index: 2

Wind: 7 mph

11 AM

79°

Feels Like 81°

Humidity: 84%

UV Index: 2

Wind: 8 mph

12 PM

81°

Feels Like 88°

Humidity: 79%

UV Index: 3

Wind: 9 mph

1 PM

82°

Feels Like 91°

Humidity: 75%

UV Index: 4

Wind: 9 mph

2 PM

84°

Feels Like 95°

Humidity: 70%

UV Index: 7

Wind: 10 mph

3 PM

81°

Feels Like 88°

Humidity: 84%

UV Index: 2

Wind: 10 mph

4 PM

86°

Feels Like 93°

Humidity: 66%

UV Index: 4

Wind: 10 mph

5 PM

82°

Feels Like 90°

Humidity: 73%

UV Index: 2

Wind: 10 mph

6 PM

81°

Feels Like 82°

Humidity: 83%

UV Index: 1

Wind: 12 mph

7 PM

79°

Feels Like 81°

Humidity: 81%

UV Index: 1

Wind: 12 mph

8 PM

75°

Feels Like 79°

Humidity: 85%

UV Index: 0

Wind: 12 mph

9 PM

75°

Feels Like 79°

Humidity: 87%

UV Index: 0

Wind: 9 mph

10 PM

73°

Feels Like 75°

Humidity: 92%

UV Index: 0

Wind: 7 mph

11 PM

72°

Feels Like 75°

Humidity: 93%

UV Index: 0

Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM

22 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.39 µg/m³
PM₁₀: 5.58 µg/m³
O₃: 0.020 ppm
NO₂: 1.8 ppb
SO₂: 1 ppb
CO: 0.11 ppm

Health Recommendations:

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

9 AM

22 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.39 µg/m³
PM₁₀: 5.56 µg/m³
O₃: 0.019 ppm
NO₂: 2 ppb
SO₂: 0.9 ppb
CO: 0.11 ppm

Health Recommendations:

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

10 AM

23 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.47 µg/m³
PM₁₀: 5.62 µg/m³
O₃: 0.018 ppm
NO₂: 2 ppb
SO₂: 1 ppb
CO: 0.11 ppm

Health Recommendations:

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

11 AM

23 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.56 µg/m³
PM₁₀: 5.69 µg/m³
O₃: 0.018 ppm
NO₂: 2 ppb
SO₂: 1 ppb
CO: 0.11 ppm

Health Recommendations:

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

12 PM

25 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 5.93 µg/m³
PM₁₀: 6.09 µg/m³
O₃: 0.022 ppm
NO₂: 1.6 ppb
SO₂: 1 ppb
CO: 0.10 ppm

Health Recommendations:

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

1 PM

27 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 6.56 µg/m³
PM₁₀: 6.79 µg/m³
O₃: 0.027 ppm
NO₂: 1.2 ppb
SO₂: 1.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

2 PM

31 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.54 µg/m³
PM₁₀: 7.81 µg/m³
O₃: 0.032 ppm
NO₂: 0.9 ppb
SO₂: 1.2 ppb
CO: 0.10 ppm

Health Recommendations:

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

3 PM

37 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 8.56 µg/m³
PM₁₀: 8.87 µg/m³
O₃: 0.040 ppm
NO₂: 0.6 ppb
SO₂: 1.3 ppb
CO: 0.10 ppm

Health Recommendations:

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

4 PM

40 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.44 µg/m³
PM₁₀: 9.81 µg/m³
O₃: 0.043 ppm
NO₂: 0.7 ppb
SO₂: 1.4 ppb
CO: 0.10 ppm

Health Recommendations:

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

5 PM

42 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.96 µg/m³
PM₁₀: 10.36 µg/m³
O₃: 0.044 ppm
NO₂: 0.7 ppb
SO₂: 1.5 ppb
CO: 0.10 ppm

Health Recommendations:

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

6 PM

42 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.16 µg/m³
PM₁₀: 10.59 µg/m³
O₃: 0.042 ppm
NO₂: 1 ppb
SO₂: 1.4 ppb
CO: 0.10 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: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.17 µg/m³
PM₁₀: 10.63 µg/m³
O₃: 0.039 ppm
NO₂: 1.3 ppb
SO₂: 1.2 ppb
CO: 0.11 ppm

Health Recommendations:

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

8 PM

42 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.99 µg/m³
PM₁₀: 10.47 µg/m³
O₃: 0.035 ppm
NO₂: 1.6 ppb
SO₂: 1.1 ppb
CO: 0.11 ppm

Health Recommendations:

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

9 PM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.8 µg/m³
PM₁₀: 10.31 µg/m³
O₃: 0.031 ppm
NO₂: 1.8 ppb
SO₂: 1 ppb
CO: 0.11 ppm

Health Recommendations:

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

10 PM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.74 µg/m³
PM₁₀: 10.3 µg/m³
O₃: 0.026 ppm
NO₂: 1.9 ppb
SO₂: 0.8 ppb
CO: 0.11 ppm

Health Recommendations:

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

11 PM

40 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.69 µg/m³
PM₁₀: 10.3 µg/m³
O₃: 0.023 ppm
NO₂: 2 ppb
SO₂: 0.7 ppb
CO: 0.11 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Indianapolis

Severe Future Possible

Flood Watch

Flood Watch issued August 12 at 5:38AM EDT until August 13 at 12:00AM EDT by NWS Indianapolis IN

Aug 12, 5:38 AM → Aug 13, 12:00 AM

WHAT: Flash flooding caused by excessive rainfall continues to be
possible.

WHERE: Much of central Indiana

WHEN: Through this evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

ADDITIONAL DETAILS:
- Flash Flooding is ongoing across portions of the watch with
continued and additional flash flooding likely due to
additional storms today.
- http://www.weather.gov/safety/flood

+ Read More

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Updated: Aug 12, 6:29 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Indianapolis

Flood Watch

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