August weather forecast
Fort Thompson, SD

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Weather in August

The last month of the summer, August, is also a moderately hot month in Fort Thompson, South Dakota, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 63.7°F (17.6°C).

Temperature

August begins with an average high-temperature of a warm 85.8°F (29.9°C), reflecting close similarity to the preceding month. During August, Fort Thompson detects a significant contrast from its daytime temperatures, with nights averaging at an enjoyable 63.7°F (17.6°C).

Heat index

The heat index for August is computed to be a tropical 89.6°F (32°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. 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 particularly relevant to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

In August, the average relative humidity in Fort Thompson is 59%.

Rainfall

In Fort Thompson, in August, during 11 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Fort Thompson, during the entire year, the rain falls for 107.6 days and collects up to 17.83" (453mm) of precipitation.

Snowfall

In Fort Thompson, snow does not fall in May through September.

Daylight

The average length of the day in August in Fort Thompson is 13h and 57min.
On the first day of August, sunrise is at 6:26 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 8:14 pm CDT.

Sunshine

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

UV index

The months with the highest UV index in Fort Thompson are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

How hot is August in Fort Thompson?

In August, the average high-temperature and low-temperature are 85.8°F (29.9°C) and 63.7°F (17.6°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the average humidity in August in Fort Thompson?

The average relative humidity in August is 59%.

How much does it rain in Fort Thompson in August?

In August, the rain falls for 11 days. Throughout August, 1.5" (38mm) of precipitation is accumulated.

When it does not snow in Fort Thompson?

In Fort Thompson, snow does not fall in May through September.

How many hours of daylight does Fort Thompson have in August?

In Fort Thompson, South Dakota, the average day length in August is 13h and 57min.

When are sunrise and sunset in August in Fort Thompson?

In August, on the first day of the month, sunrise is at 6:26 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 8:14 pm CDT.

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

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

What are the months with the highest UV index in Fort Thompson?

The months with the highest UV index in Fort Thompson are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Fort Thompson?

In Fort Thompson, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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 Thompson, SD

Average temperature in August - Fort Thompson, SD
  • Average high temperature in August: 85.8°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).

  • Average low temperature in August: 63.7°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 (12.6°F).

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Average pressure in August
Fort Thompson, SD

Average pressure in August - Fort Thompson, SD
  • Average pressure in August: 29.91"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 Thompson, SD

Average wind speed in August - Fort Thompson, SD
  • Average wind speed in August: 9.1mph

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).

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Average humidity in August
Fort Thompson, SD

Average humidity in August - Fort Thompson, SD
  • Average humidity in August: 59%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).

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Average rainfall in August
Fort Thompson, SD

Average rainfall in August - Fort Thompson, SD
  • Average rainfall in August: 1.5"

The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").

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Average rainfall days in August
Fort Thompson, SD

Average rainfall days in August - Fort Thompson, SD
  • Average rainfall days in August: 11 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in August
Fort Thompson, SD

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

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

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Average snowfall days in August
Fort Thompson, SD

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

The months with the highest number of snowfall days are January and February (11.7 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 Thompson, SD

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

The month with the longest days is June (Average daylight: 15h and 24min).
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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in August
Fort Thompson, SD

Average sunshine days in August - Fort Thompson, SD
  • Average sunshine days in August: 17.2 days

The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).

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Average UV index in August
Fort Thompson, SD

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

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in August
Fort Thompson, SD

Average cloud cover in August - Fort Thompson, SD
  • Average cloud cover in August: 20

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in August
Fort Thompson, SD

Average visibility in August - Fort Thompson, SD
  • Average visibility in August: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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Fort Thompson, South Dakota, USA

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