August weather forecast
Cottonwood, SD

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Weather in August

The last month of the summer, August, is another hot month in Cottonwood, South Dakota, with an average temperature varying between 66.9°F (19.4°C) and 87.1°F (30.6°C).

Temperature

The commencement of August introduces an average high-temperature of a still hot 87.1°F (30.6°C), closely mirroring the preceding month. During the month of August, the temperature falls to an average of 66.9°F (19.4°C).

Heat index

The heat index for August is appraised at a hot 89.6°F (32°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. 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 extremely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

In August, the average relative humidity is 48%.

Rainfall

In Cottonwood, in August, during 10.8 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. In Cottonwood, during the entire year, the rain falls for 95.3 days and collects up to 13.74" (349mm) of precipitation.

Snowfall

In Cottonwood, snow does not fall in June through September.

Daylight

The average length of the day in August is 13h and 57min.
On the first day of August, sunrise is at 5:36 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:24 pm MDT.

Sunshine

The month with the most sunshine is August, with an average of 11.7h of sunshine.

UV index

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

The high-temperature, in August, in Cottonwood, records 87.1°F (30.6°C), while the low-temperature is 66.9°F (19.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 89.6°F (32°C).

What is the average humidity in August?

In Cottonwood, the average relative humidity in August is 48%.

How much does it rain in August?

In Cottonwood, in August, during 10.8 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

When it does not snow?

In Cottonwood, snow does not fall in June through September.

How many hours of daylight does Cottonwood have in August?

The average day length in August is 13h and 57min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 5:36 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:24 pm MDT.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 11.7h of sunshine.

How long on average sun shines in August?

In August, the average sunshine duration is 11.7h.

What is the UV index intensity in August?

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

Average temperature in August - Cottonwood, SD
  • Average high temperature in August: 87.1°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in August: 66.9°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

Average pressure in August
Cottonwood, SD

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in August
Cottonwood, SD

Average wind speed in August - Cottonwood, SD
  • Average wind speed in August: 10.2mph

The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is February (10.1mph).

Average humidity in August
Cottonwood, SD

Average humidity in August - Cottonwood, SD
  • Average humidity in August: 48%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (47%).

Average rainfall in August
Cottonwood, SD

Average rainfall in August - Cottonwood, SD
  • Average rainfall in August: 1.18"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.39").

Average rainfall days in August
Cottonwood, SD

Average rainfall days in August - Cottonwood, SD
  • Average rainfall days in August: 10.8 days

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.6 days).

Average snowfall in August
Cottonwood, SD

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

The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Cottonwood, SD

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

The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Cottonwood, SD

Average daylight in August / Average sunshine in August - Cottonwood, 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 4min

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).

Average sunshine days in August
Cottonwood, SD

Average sunshine days in August - Cottonwood, SD
  • Average sunshine days in August: 16.7 days

The month with the most sunshine days is December (21.1 days).
The months with the least sunshine days are April and June (14.1 days).

Average UV index in August
Cottonwood, SD

Average UV index in August - Cottonwood, SD
  • Average UV index in August: 6

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

Average cloud cover in August
Cottonwood, SD

Average cloud cover in August - Cottonwood, SD
  • Average cloud cover in August: 18

The month with the most cloud cover is January (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 18).

Average visibility in August
Cottonwood, SD

Average visibility in August - Cottonwood, 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).

Cottonwood, South Dakota, USA

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