August weather forecast
Letcher, SD

Weather in August

August, the last month of the summer in Letcher, is another warm month, with an average temperature ranging between min 62.1°F (16.7°C) and max 84.4°F (29.1°C).

Temperature

In Letcher, the average high-temperature in August is relatively the same as in July - a still warm 84.4°F (29.1°C). In Letcher, South Dakota, in August, the average low-temperature is 62.1°F (16.7°C).

Heat index

In August, the average heat index is computed to be a tropical 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, pregnancy), and activity. 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 especially crucial for babies and toddlers. 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

The average relative humidity in August is 65%.

Rainfall

In Letcher, in August, during 10.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Letcher, during the entire year, the rain falls for 93.2 days and collects up to 11.3" (287mm) of precipitation.

Snowfall

In Letcher, snow does not fall in May through September.

Daylight

In August, the average length of the day is 13h and 56min.
On the first day of August in Letcher, South Dakota, sunrise is at 6:21 am and sunset at 8:56 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 8:10 pm CDT.

Sunshine

In Letcher, South Dakota, the average sunshine in August is 10.7h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
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. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Letcher?

In Letcher, South Dakota, in August, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 62.1°F (16.7°C). in August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is computed to be 89.6°F (32°C).

What is the average humidity in August in Letcher?

The average relative humidity in August is 65%.

How many days does it rain in August in Letcher?

In Letcher, South Dakota, in August, during 10.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

When it does not snow in Letcher?

In Letcher, snow does not fall in May through September.

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

The average day length in August in Letcher is 13h and 56min.

When is the sunrise / sunset in August in Letcher?

On the first day of August in Letcher, South Dakota, sunrise is at 6:21 am and sunset at 8:56 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 8:10 pm CDT.

How long on average sun shines in August in Letcher?

The average sunshine duration in August in Letcher, South Dakota, is 10.7h.

What is the month with the highest UV index in Letcher?

The months with the highest UV index in Letcher, South Dakota, are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Letcher?

In August, the average daily maximum UV index in Letcher, South Dakota, is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Letcher, SD

Average temperature in August - Letcher, SD
  • Average high temperature in August: 84.4°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (24.4°F).

  • Average low temperature in August: 62.1°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).

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Average pressure in August
Letcher, SD

Average pressure in August - Letcher, SD
  • Average pressure in August: 29.92"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in August
Letcher, SD

Average wind speed in August - Letcher, SD
  • Average wind speed in August: 8.7mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).

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Average humidity in August
Letcher, SD

Average humidity in August - Letcher, SD
  • Average humidity in August: 65%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are September and October (63%).

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Average rainfall in August
Letcher, SD

Average rainfall in August - Letcher, SD
  • Average rainfall in August: 1.14"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and November (0.28").

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Average rainfall days in August
Letcher, SD

Average rainfall days in August - Letcher, SD
  • Average rainfall days in August: 10.5 days

The month with the highest number of rainy days is June (13.6 days).
The month with the least rainy days is February (1.9 days).

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Average snowfall in August
Letcher, SD

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

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Letcher, SD

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

The month with the highest number of snowfall days is January (8.7 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
Letcher, SD

Average daylight in August / Average sunshine in August - Letcher, SD
  • Average daylight in August: 13h and 56min

The month with the longest days is June (Average daylight: 15h and 25min).
The month with the shortest days is December (Average daylight: 8h and 58min).

  • Average sunshine in August: 10h and 42min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in August
Letcher, SD

Average sunshine days in August - Letcher, SD
  • Average sunshine days in August: 17.3 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.8 days).

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Average UV index in August
Letcher, SD

Average UV index in August - Letcher, 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 January (UV index 1).

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Average cloud cover in August
Letcher, SD

Average cloud cover in August - Letcher, SD
  • Average cloud cover in August: 24

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 22).

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Average visibility in August
Letcher, SD

Average visibility in August - Letcher, 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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