August weather forecast
Indianapolis, IN

englishespañol中文
Share
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape

Weather in August

In August, Indianapolis sees slightly lower temperatures than the previous month, with temperatures varying from 81.1°F (27.3°C) to 64°F (17.8°C). While the sun continues to rule the sky, there's no dearth of refreshing breezes. The weather remains conducive for enjoying the city's outdoor attractions before the onset of autumn. Despite occasional rains, August remains pleasantly warm, a testament to the friendly Indiana summer.

Temperature

As July transitions into August, the average high-temperature rests at a still moderately hot 81.1°F (27.3°C), maintaining a close resemblance to the previous month. Indianapolis sees an average low-temperature of 64°F (17.8°C) during August.

Heat index

August's average heat index is evaluated at a tropical 86°F (30°C). Continuous activity in exposure could lead to a feeling of fatigue and heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Indianapolis, the average relative humidity in August is 78%.

Rainfall

In August, in Indianapolis, the rain falls for 14.6 days. Throughout August, 1.65" (42mm) of precipitation is accumulated. Throughout the year, in Indianapolis, there are 146.4 rainfall days, and 21.14" (537mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Indianapolis.

Daylight

In August, the average length of the day is 13h and 41min.
On the first day of August, sunrise is at 6:44 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 8:16 pm EDT.

Sunshine

The average sunshine in August is 9.6h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In August, an average UV index of 6 transforms into the following instructions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
[Resources]

Frequently asked questions

What are the temperatures in Indianapolis in August?

In Indianapolis, in August, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 64°F (17.8°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 86°F (30°C).

What is the average humidity in August in Indianapolis?

In Indianapolis, the average relative humidity in August is 78%.

How much does it rain in Indianapolis in August?

In August, in Indianapolis, Indiana, the rain falls for 14.6 days. Throughout August, 1.65" (42mm) of precipitation is accumulated.

When it does not snow in Indianapolis?

In Indianapolis, Indiana, snow does not fall in May through October.

How many hours of daylight does Indianapolis have in August?

In Indianapolis, Indiana, the average day length in August is 13h and 41min.

When are sunrise and sunset in August in Indianapolis?

On the first day of August in Indianapolis, Indiana, sunrise is at 6:44 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 8:16 pm EDT.

How many hours of sunshine does Indianapolis have in August?

In August, the average sunshine duration in Indianapolis, Indiana, is 9.6h.

When is the highest UV index in Indianapolis?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Indianapolis.

How high is the UV index in August in Indianapolis?

In August, the average daily maximum UV index in Indianapolis is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Indianapolis, IN

Average temperature in August - Indianapolis, IN
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in August: 64°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

[Resources]

Average pressure in August
Indianapolis, IN

Average pressure in August - Indianapolis, IN
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

[Resources]

Average wind speed in August
Indianapolis, IN

Average wind speed in August - Indianapolis, IN
  • Average wind speed in August: 5.7mph

The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

[Resources]

Average humidity in August
Indianapolis, IN

Average humidity in August - Indianapolis, IN
  • Average humidity in August: 78%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).

[Resources]

Average rainfall in August
Indianapolis, IN

Average rainfall in August - Indianapolis, IN
  • Average rainfall in August: 1.65"

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").

[Resources]

Average rainfall days in August
Indianapolis, IN

Average rainfall days in August - Indianapolis, IN
  • Average rainfall days in August: 14.6 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).

[Resources]

Average snowfall in August
Indianapolis, IN

Average snowfall in August - Indianapolis, IN
  • Average snowfall in August: 0"

The month with the highest snowfall is December (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in August
Indianapolis, IN

Average snowfall days in August - Indianapolis, IN
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in August /
Average sunshine in August
Indianapolis, IN

Average daylight in August / Average sunshine in August - Indianapolis, IN
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

[Resources]

Average sunshine days in August
Indianapolis, IN

Average sunshine days in August - Indianapolis, IN
  • Average sunshine days in August: 13.5 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).

[Resources]

Average UV index in August
Indianapolis, IN

Average UV index in August - Indianapolis, IN
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

[Resources]

Average cloud cover in August
Indianapolis, IN

Average cloud cover in August - Indianapolis, IN
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).

[Resources]

Average visibility in August
Indianapolis, IN

Average visibility in August - Indianapolis, IN
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Indianapolis, Indiana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location