August weather forecast and climate
Pierre, SD

The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront
The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront
The last month of the summer, August, is another tropical month in Pierre, South Dakota, with average temperature fluctuating between 65.5°F (18.6°C) and 86°F (30°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still hot 86°F (30°C). In August, in Pierre, the average low-temperature is 65.5°F (18.6°C).

Heat index

In August, the average heat index is estimated at a tropical 88.5°F (31.4°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity 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 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, clothing, wind, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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

Months with the lowest humidity in Pierre are August and September, with an average relative humidity of 52%.

Rainfall

In August, in Pierre, the rain falls for 11.9 days. Throughout August, 1.34" (34mm) of precipitation is accumulated. In Pierre, South Dakota, during the entire year, the rain falls for 98.5 days and collects up to 13.7" (348mm) of precipitation.

Snowfall

In Pierre snow does not fall in June through September.

Daylight

In August, the average length of the day is 14h.

Sunshine

In August, the average sunshine is 11h.

UV index

In August, the average daily maximum UV index in Pierre is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in August in Pierre?

In August, the average high-temperature is 86°F (30°C), and the average low-temperature is 65.5°F (18.6°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, in August is evaluated at 88.5°F (31.4°C).

What are the least humid months in Pierre?

August and September, with an average relative humidity of 52%, are the least humid months.

What is the average humidity in August in Pierre?

The average relative humidity in August in Pierre is 52%.

How much does it rain in Pierre in August?

In Pierre, South Dakota, in August, during 11.9 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When it does not snow in Pierre?

In Pierre, South Dakota, snow does not fall in June through September.

What is the average length of the day in August in Pierre?

The average length of the day in August in Pierre is 14h.

How long on average sun shines in August in Pierre?

The average sunshine in August in Pierre is 11h.

What is the UV index intensity in August in Pierre?

In Pierre, South Dakota, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Pierre, SD
  • Average high temperature in August: 30°C

The warmest month (with the highest average high temperature) is July (31.5°C).
The month with the lowest average high temperature is January (-3.2°C).

  • Average low temperature in August: 18.6°C

The month with the highest average low temperature is July (19.7°C).
The coldest month (with the lowest average low temperature) is January (-10.8°C).

Average pressure in August - Pierre, SD
  • Average pressure in August: 1012.5mbar

The month with the highest atmospheric pressure is January (1021.3mbar).
The month with the lowest atmospheric pressure is June (1010.5mbar).

Average wind speed in August - Pierre, SD
  • Average wind speed in August: 16km/h

The windiest month (with the highest average wind speed) is April (19.1km/h).
The calmest month (with the lowest average wind speed) is February (15.9km/h).

Average humidity in August - Pierre, SD
  • Average humidity in August: 52%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are August and September (52%).

Average rainfall in August - Pierre, SD
  • Average rainfall in August: 34mm

The wettest month (with the highest rainfall) is May (57mm).
The driest month (with the least rainfall) is January (9mm).

Average rainfall days in August - Pierre, SD
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is February (2.4 days).

Average snowfall in August - Pierre, SD
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (93mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in August - Pierre, SD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (10 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Pierre, SD
  • Average daylight in August: 14h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in August: 11h

The month with the most sunshine is July (Average sunshine: 11.5h).
The month with the least sunshine is January (Average sunshine: 4.6h).

Average sunshine days in August - Pierre, SD
  • Average sunshine days in August: 15 days

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is June (13.7 days).

Average UV index in August - Pierre, SD
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are February and December (UV index 1).

Average cloud cover in August - Pierre, SD
  • Average cloud cover in August: 19

The month with the most cloud cover is January (Cloud cover 50).
Months with the least cloud cover are July and August (Cloud cover 19).

Average visibility in August - Pierre, SD
  • Average visibility in August: 10km

Months with the highest visibility are May, June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April and December (9km).