August weather forecast
Fort Pierre, SD

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Weather in August

August brings a subtle hint of forthcoming autumn despite maintaining warm temperatures. The maximum temperature shows a slight decrement, dropping to an average of 86°F (30°C) in August from July's record-highs. This reduction in heat, coupled with a decline in daylight hours, paints the first strokes of fall onto Fort Pierre. A marginally lower UV index than July results in a minute decrease in the risk of sun-induced ailments. The climate remains stocked with sunshine and warm breezes, making it an ideal time for outdoor fun.

Temperature

August brings a marginal elevation to a still hot 86°F (30°C) from July's 88.7°F (31.5°C) in Fort Pierre's average high-temperatures. August nights in Fort Pierre are marked by an average low-temperature of 65.5°F (18.6°C).

Heat index

Throughout August, the heat index is computed to be a tropical 87.8°F (31°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Heat index determinations are made taking into account the shade and light air movements. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

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

Rainfall

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

Snowfall

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

Daylight

In Fort Pierre, the average length of the day in August is 13h and 58min.
On the first day of August, sunrise is at 5:29 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 7:19 pm MDT.

Sunshine

The average sunshine in August in Fort Pierre is 11h.

UV index

In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the maximum UV index of 6 suggests these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

How hot is it in Fort Pierre in August?

An average high-temperature, in August, in Fort Pierre, is 86°F (30°C) and the average low-temperature is 65.5°F (18.6°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 87.8°F (31°C).

What is the least humid month in Fort Pierre?

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

What is the average humidity in August in Fort Pierre?

In August, the average relative humidity is 52%.

How much does it rain in Fort Pierre in August?

In Fort Pierre, South Dakota, during August, the rain falls for 11.9 days and regularly aggregates up to 1.34" (34mm) of precipitation.

When it does not snow in Fort Pierre?

June through September are months without snowfall in Fort Pierre.

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

In Fort Pierre, the average day length in August is 13h and 58min.

What time are sunrise and sunset in August in Fort Pierre?

On the first day of August, sunrise is at 5:29 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 7:19 pm MDT.

How long on average sun shines in August in Fort Pierre?

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

What is the UV index reading in August in Fort Pierre?

In Fort Pierre, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to 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
Fort Pierre, SD

Average temperature in August - Fort 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
Fort Pierre, SD

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

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

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Average wind speed in August
Fort Pierre, SD

Average wind speed in August - Fort 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
Fort Pierre, SD

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

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

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Average rainfall in August
Fort Pierre, SD

Average rainfall in August - Fort 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
Fort Pierre, SD

Average rainfall days in August - Fort 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
Fort Pierre, SD

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

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

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Average snowfall days in August
Fort Pierre, SD

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

The month with the highest number of snowfall days is February (10 days).
The 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
Fort Pierre, SD

Average daylight in August / Average sunshine in August - Fort Pierre, SD
  • Average daylight in August: 14h and 0min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in August: 11h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in August
Fort Pierre, SD

Average sunshine days in August - Fort 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
Fort Pierre, SD

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

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

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Average cloud cover in August
Fort Pierre, SD

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

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

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Average visibility in August
Fort Pierre, SD

Average visibility in August - Fort Pierre, SD
  • 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).

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Fort Pierre, South Dakota, USA

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