August weather forecast and climate
Pierre, SD

The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park
The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park

Weather in August

August, the last month of the summer, in Pierre, is another hot month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 86°F (30°C).

Temperature

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

Heat index

The average heat index in August is estimated at a tropical 88.5°F (31.4°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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, clothing). 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

In August, the rain falls for 11.9 days. Throughout August, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in Pierre, there are 98.5 rainfall days, and 13.7" (348mm) of precipitation is accumulated.

Snowfall

In Pierre snow does not fall in June through September.

Daylight

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

Sunshine

The average sunshine in Pierre is 11h.

UV index

The average daily maximum UV index in Pierre, South Dakota, is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Pierre?

In Pierre, South Dakota, in August, the average high-temperature is 86°F (30°C), and the average low-temperature is 65.5°F (18.6°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), that combines both air temperature and relative humidity, is appraised at 88.5°F (31.4°C).

What is the least humid month in Pierre?

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

What is the average humidity in August in Pierre?

In August, the average relative humidity in Pierre, South Dakota, 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 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, South Dakota, is 14h.

How long on average sun shines in August in Pierre?

In August, the average sunshine in Pierre is 11h.

What is the UV index intensity in August in Pierre?

The average daily maximum UV index in August in Pierre is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Pierre, SD

Average temperature in August - Pierre, SD
  • Average high temperature in August: 86°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in August: 65.5°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

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Average pressure in August
Pierre, SD

Average pressure in August - Pierre, SD
  • Average pressure in August: 29.9"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in August
Pierre, SD

Average wind speed in August - Pierre, SD
  • Average wind speed in August: 9.9mph

The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest months (with the lowest average wind speed) are February and August (9.9mph).

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Average humidity in August
Pierre, SD

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%).

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Average rainfall in August
Pierre, SD

Average rainfall in August - Pierre, SD
  • Average rainfall in August: 1.34"

The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.35").

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Average rainfall days in August
Pierre, SD

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).

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Average snowfall in August
Pierre, SD

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

The month with the highest snowfall is February (3.66").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Pierre, SD

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).

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Average daylight in August /
Average sunshine in August
Pierre, SD

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).

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Average sunshine days in August
Pierre, SD

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).

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Average UV index in August
Pierre, SD

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).

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Average cloud cover in August
Pierre, SD

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).

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Average visibility in August
Pierre, SD

Average visibility in August - Pierre, SD
  • Average visibility in August: 6mi

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

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