August weather forecast
River Sioux, IA

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Weather in August

August, the last month of the summer in River Sioux, is another warm month, with an average temperature varying between 82.2°F (27.9°C) and 62.2°F (16.8°C).

Temperature

August begins with an average high-temperature of a still moderately hot 82.2°F (27.9°C), reflecting close similarity to the preceding month. River Sioux's average low-temperature in the month of August is recorded at a refreshing 62.2°F (16.8°C).

Heat index

The heat index for August is evaluated at a tropical 87.8°F (31°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

The average relative humidity in August in River Sioux is 76%.

Rainfall

In River Sioux, during August, the rain falls for 14 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, there are 125.1 rainfall days, and 22.64" (575mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in River Sioux.

Daylight

The average length of the day in August in River Sioux, Iowa, is 13h and 49min.
On the first day of August in River Sioux, sunrise is at 6:18 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:58 pm CDT.

Sunshine

In August, the average sunshine in River Sioux is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in River Sioux. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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Frequently asked questions

What is the usual temperature for River Sioux in August?

The high-temperature, in August, in River Sioux, records 82.2°F (27.9°C), while the low-temperature is 62.2°F (16.8°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in August is evaluated at 87.8°F (31°C).

What is the average humidity in August in River Sioux?

In August, the average relative humidity in River Sioux, Iowa, is 76%.

How many days does it rain in August in River Sioux?

In August, in River Sioux, the rain falls for 14 days. Throughout August, 2.4" (61mm) of precipitation is accumulated.

When it does not snow in River Sioux?

In River Sioux, snow does not fall in June through September.

How many hours of daylight does River Sioux have in August?

In River Sioux, Iowa, the average day length in August is 13h and 49min.

What time are sunrise and sunset in August in River Sioux?

On the first day of August in River Sioux, sunrise is at 6:18 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:58 pm CDT.

How long on average sun shines in August in River Sioux?

The average sunshine duration in August in River Sioux, Iowa, is 10.1h.

When is the highest UV index in River Sioux?

The months with the highest UV index in River Sioux, Iowa, are June through August, with an average maximum UV index of 6.

How high is the UV index in August in River Sioux?

In August, the average daily maximum UV index in River Sioux is 6. A UV Index estimate of 6 to 7 represents a high health threat 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
River Sioux, IA

Average temperature in August - River Sioux, IA
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in August: 62.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure in August
River Sioux, IA

Average pressure in August - River Sioux, IA
  • Average pressure in August: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in August
River Sioux, IA

Average wind speed in August - River Sioux, IA
  • Average wind speed in August: 7.5mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).

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Average humidity in August
River Sioux, IA

Average humidity in August - River Sioux, IA
  • Average humidity in August: 76%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in August
River Sioux, IA

Average rainfall in August - River Sioux, IA
  • Average rainfall in August: 2.4"

The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is January (0.71").

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Average rainfall days in August
River Sioux, IA

Average rainfall days in August - River Sioux, IA
  • Average rainfall days in August: 14 days

The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in August
River Sioux, IA

Average snowfall in August - River Sioux, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.8").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
River Sioux, IA

Average snowfall days in August - River Sioux, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (9.4 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
River Sioux, IA

Average daylight in August / Average sunshine in August - River Sioux, IA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in August
River Sioux, IA

Average sunshine days in August - River Sioux, IA
  • Average sunshine days in August: 14.8 days

The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in August
River Sioux, IA

Average UV index in August - River Sioux, IA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
River Sioux, IA

Average cloud cover in August - River Sioux, IA
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in August
River Sioux, IA

Average visibility in August - River Sioux, IA
  • 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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River Sioux, Iowa, USA

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