August weather forecast
Vivian, SD

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Weather in August

The last month of the summer, August, is another hot month in Vivian, South Dakota, with an average temperature varying between 86°F (30°C) and 65.5°F (18.6°C).

Temperature

As Vivian, South Dakota, steps into August, the average high-temperature is measured at a still tropical 86°F (30°C), displaying minor differences from July's 88.7°F (31.5°C). Throughout August, Vivian witnesses a nighttime temperature average of 65.5°F (18.6°C).

Heat index

The heat index value for August is computed to be a tropical 87.8°F (31°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical 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 primarily vital for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.

Humidity

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

Rainfall

In Vivian, in August, it is raining for 11.9 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 98.5 rainfall days, and 13.7" (348mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 56min.
On the first day of August, sunrise is at 6:30 am and sunset at 9:04 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:18 pm CDT.

Sunshine

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

UV index

In August, the average daily maximum UV index in Vivian is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Frequently asked questions

Is it hot in Vivian during August?

The high-temperature, in August, in Vivian, records 86°F (30°C), while the low-temperature is 65.5°F (18.6°C). The average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, in August is computed to be 87.8°F (31°C).

What is the least humid month in Vivian?

The months with the lowest humidity in Vivian, South Dakota, are August and September, with an average relative humidity of 52%.

What is the average humidity in August in Vivian?

The average relative humidity in August in Vivian, South Dakota, is 52%.

How many days does it rain in August in Vivian?

In Vivian, in August, during 11.9 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When it does not snow in Vivian?

June through September are months without snowfall in Vivian.

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

The average day length in August in Vivian, South Dakota, is 13h and 56min.

What time are sunrise and sunset in August in Vivian?

On the first day of August in Vivian, South Dakota, sunrise is at 6:30 am and sunset at 9:04 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:18 pm CDT.

How many hours of sunshine does Vivian have in August?

In August, the average sunshine duration is 11h.

What is the UV index reading in August in Vivian?

The average daily maximum UV index in August in Vivian, South Dakota, is 6. A UV Index reading 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Vivian, SD

Average temperature in August - Vivian, 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
Vivian, SD

Average pressure in August - Vivian, 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
Vivian, SD

Average wind speed in August - Vivian, 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
Vivian, SD

Average humidity in August - Vivian, 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
Vivian, SD

Average rainfall in August - Vivian, 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
Vivian, SD

Average rainfall days in August - Vivian, 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
Vivian, SD

Average snowfall in August - Vivian, 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
Vivian, SD

Average snowfall days in August - Vivian, 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
Vivian, SD

Average daylight in August / Average sunshine in August - Vivian, SD
  • Average daylight in August: 13h and 5min

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: 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
Vivian, SD

Average sunshine days in August - Vivian, 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
Vivian, SD

Average UV index in August - Vivian, 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
Vivian, SD

Average cloud cover in August - Vivian, 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
Vivian, SD

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

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