Indianapolis
Indiana, USA
Long-term weather forecast
Long-term weather forecast
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August weather forecast and Climate
Indianapolis, IN

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The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
August is a warm and humid summer month in Indianapolis with average temperatures in the 64°F (17.8°C) to 84°F (28.9°C) zone.
The sunshine registers around 8.8 hours during the 14-hour long days, which see many activities like fishing, kayaking, canoeing, and swimming in the numerous water bodies around the city. The skies are occasionally cloudy, and the rainfall of 3.1" (78.7mm) occurs mostly during the thunderstorms that are frequent in August. Evenings are cozy and bright for a nice walk down the river.
Light summer clothing such as t-shirts and sweatshirts are comfortable to wear in August to take care of the sweating.
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  • The average high temperature in August: 84°F

The warmest month (with the highest average high temperature) is July (85°F).
The month with the lowest average high temperature is January (35.6°F).

  • The average low temperature in August: 64.4°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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  • The average humidity in August: 75.4%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is April (65.6%).

  • The average rainfall in August: 3.1"

The wettest month (with the highest rainfall) is May (5.1").
The driest month (with the lowest rainfall) is February (2.3").

  • The average rainfall days in August: 8.5 days

The month with the highest number of rainy days is May (13.1 days).
The month with the lowest number of rainy days is September (8.1 days).

  • The average snowfall in August: 0"

The month with the highest snowfall is January (8.6").
Months with the lowest snowfall are May, June, July, August and September (0").

  • The average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.5 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • The average daylight in August: 14h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in August: 8.8h

The month with most sunshine is June (Average sunshine: 9.6h).
The month with least sunshine is December (Average sunshine: 3.3h).

  • The average UV index in August: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).

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