Indianapolis
Indiana, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Indianapolis, IN

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
The last month of the summer, August, is also a moderately hot month in Indianapolis, Indiana, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 64°F (17.8°C).

Temperature

In August, the average high-temperature is almost the same as in July - a still warm 81.1°F (27.3°C). In Indianapolis, Indiana, the average low-temperature is 64°F (17.8°C).

Heat index

The average heat index in August is appraised at a hot 86.4°F (30.2°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, clothing, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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 August, the average relative humidity in Indianapolis is 78%.

Rainfall

In Indianapolis, during August, the rain falls for 14.6 days and regularly aggregates up to 1.65" (42mm) of precipitation. 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.

Daylight

In Indianapolis, the average length of the day in August is 13.7h.

Sunshine

The average sunshine in August is 9.6h.

UV index

Months with the highest UV index in Indianapolis are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Indianapolis?

In August, in Indianapolis, Indiana, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 64°F (17.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that calculates temperature value influenced by the moisture in the air, is calculated to 86.4°F (30.2°C).

What is the average humidity in August in Indianapolis?

The average relative humidity in August is 78%.

How many days does it rain in August in Indianapolis?

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?

May through October are months without snowfall in Indianapolis.

How many hours of daylight does Indianapolis have in August?

In August, the average length of the day in Indianapolis, Indiana, is 13.7h.

How many hours of sunshine does Indianapolis have in August?

The average sunshine in August is 9.6h.

What is the month with 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, Indiana.

What is the UV index reading in August in Indianapolis?

In Indianapolis, Indiana, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in August - Indianapolis, IN
  • Average high temperature in August: 27.3°C

The warmest month (with the highest average high temperature) is July (27.8°C).
The month with the lowest average high temperature is January (0.8°C).

  • Average low temperature in August: 17.8°C

The month with the highest average low temperature is July (19°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).

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%).

Average rainfall in August - Indianapolis, IN
  • Average rainfall in August: 42mm

The wettest month (with the highest rainfall) is May (68mm).
The driest month (with the lowest rainfall) is February (31mm).

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 lowest number of rainy days is February (6.8 days).

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

The month with the highest snowfall is December (58mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Indianapolis, IN
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in August: 9.6h

The month with most sunshine is July (Average sunshine: 10.3h).
The month with least sunshine is January (Average sunshine: 4.1h).

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

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