August weather forecast
Roswell, SD

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Weather in August

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

Temperature

The commencement of August introduces an average high-temperature of a still moderately hot 84.4°F (29.1°C), closely mirroring the preceding month. Roswell logs a considerable temperature decrease from the daytime highs during the nights in August, with an average reading of 62.1°F (16.7°C).

Heat index

August's average heat index 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.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.

Humidity

The average relative humidity in August in Roswell is 65%.

Rainfall

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

Snowfall

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

Daylight

In Roswell, the average length of the day in August is 13h and 57min.
On the first day of August in Roswell, sunrise is at 6:19 am and sunset at 8:54 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:07 pm CDT.

Sunshine

In Roswell, 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 in Roswell. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 6 during August leads to these advisories:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. 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. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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Frequently asked questions

How hot is it in Roswell in August?

During August, Roswell experiences an average high-temperature of 84.4°F (29.1°C) and a low-temperature of 62.1°F (16.7°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in August is computed to be 89.6°F (32°C).

What is the average humidity in August in Roswell?

In August, the average relative humidity in Roswell, South Dakota, is 65%.

How much does it rain in Roswell in August?

In August, in Roswell, the rain falls for 10.5 days. Throughout August, 1.14" (29mm) of precipitation is accumulated.

When it does not snow in Roswell?

May through September are months without snowfall in Roswell.

How many hours of daylight does Roswell have in August?

In Roswell, the average day length in August is 13h and 57min.

When is the sunrise / sunset in August in Roswell?

On the first day of August in Roswell, South Dakota, sunrise is at 6:19 am and sunset at 8:54 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:07 pm CDT.

How many hours of sunshine does Roswell have in August?

In Roswell, the average sunshine duration in August is 10.7h.

What are the months with the highest UV index in Roswell?

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

How high is the UV index in August in Roswell?

In August, the average daily maximum UV index in Roswell is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
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
Roswell, SD

Average temperature in August - Roswell, 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
Roswell, SD

Average pressure in August - Roswell, 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
Roswell, SD

Average wind speed in August - Roswell, 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
Roswell, SD

Average humidity in August - Roswell, 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
Roswell, SD

Average rainfall in August - Roswell, 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
Roswell, SD

Average rainfall days in August - Roswell, 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
Roswell, SD

Average snowfall in August - Roswell, 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
Roswell, SD

Average snowfall days in August - Roswell, 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
Roswell, SD

Average daylight in August / Average sunshine in August - Roswell, 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: 9h and 0min).

  • Average sunshine in August: 10h and 4min

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
Roswell, SD

Average sunshine days in August - Roswell, 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
Roswell, SD

Average UV index in August - Roswell, 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
Roswell, SD

Average cloud cover in August - Roswell, 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
Roswell, SD

Average visibility in August - Roswell, 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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Roswell, South Dakota, USA

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