August weather forecast
Missouri Valley, IA

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Weather in August

The last month of the summer, August, is another warm month in Missouri Valley, Iowa, with an average temperature ranging between min 62.4°F (16.9°C) and max 82°F (27.8°C).

Temperature

Missouri Valley in August witnesses an average high-temperature of a still moderately hot 82°F (27.8°C), indicating a slight variation from July's 84.2°F (29°C). Throughout the month of August, Missouri Valley witnesses an average low-temperature of 62.4°F (16.9°C).

Heat index

The average heat index in August is evaluated at a hot 87.8°F (31°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 particularly relevant to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

The average relative humidity in August is 76%.

Rainfall

In Missouri Valley, in August, it is raining for 12.8 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, there are 108.1 rainfall days, and 16.1" (409mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Missouri Valley, Iowa.

Daylight

In August, the average length of the day is 13h and 47min.
On the first day of the month, sunrise is at 6:18 am and sunset at 8:40 pm. On the last day of August, sunrise is at 6:49 am and sunset at 7:57 pm CDT.

Sunshine

In Missouri Valley, the average sunshine in August is 9.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 6 in August translates into these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
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Frequently asked questions

What is the usual temperature for Missouri Valley in August?

August temperatures in Missouri Valley vary between a high-temperature of 82°F (27.8°C) and a low-temperature of 62.4°F (16.9°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is evaluated at 87.8°F (31°C).

What is the average humidity in August in Missouri Valley?

The average relative humidity in August is 76%.

How much does it rain in Missouri Valley in August?

In August, in Missouri Valley, Iowa, the rain falls for 12.8 days. Throughout August, 2.01" (51mm) of precipitation is accumulated.

When it does not snow in Missouri Valley?

In Missouri Valley, snow does not fall in May through September.

What is the average length of the day in August in Missouri Valley?

In Missouri Valley, the average day length in August is 13h and 47min.

When is the sunrise / sunset in August in Missouri Valley?

On the first day of August in Missouri Valley, sunrise is at 6:18 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:57 pm CDT.

How long on average sun shines in August in Missouri Valley?

In Missouri Valley, Iowa, the average sunshine duration in August is 9.9h.

What is the month with the highest UV index in Missouri Valley?

The months with the highest UV index in Missouri Valley are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Missouri Valley?

In Missouri Valley, Iowa, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to 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
Missouri Valley, IA

Average temperature in August - Missouri Valley, IA
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in August: 62.4°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
Missouri Valley, IA

Average pressure in August - Missouri Valley, 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
Missouri Valley, IA

Average wind speed in August - Missouri Valley, IA
  • Average wind speed in August: 7.5mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

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Average humidity in August
Missouri Valley, IA

Average humidity in August - Missouri Valley, 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
Missouri Valley, IA

Average rainfall in August - Missouri Valley, IA
  • Average rainfall in August: 2.01"

The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is January (0.39").

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Average rainfall days in August
Missouri Valley, IA

Average rainfall days in August - Missouri Valley, IA
  • Average rainfall days in August: 12.8 days

The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (2.4 days).

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Average snowfall in August
Missouri Valley, IA

Average snowfall in August - Missouri Valley, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Missouri Valley, IA

Average snowfall days in August - Missouri Valley, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.9 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
Missouri Valley, IA

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in August
Missouri Valley, IA

Average sunshine days in August - Missouri Valley, IA
  • Average sunshine days in August: 15.7 days

The month with the most sunshine days is December (22.7 days).
The month with the least sunshine days is May (13.1 days).

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Average UV index in August
Missouri Valley, IA

Average UV index in August - Missouri Valley, 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, October, November and December (UV index 2).

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Average cloud cover in August
Missouri Valley, IA

Average cloud cover in August - Missouri Valley, IA
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in August
Missouri Valley, IA

Average visibility in August - Missouri Valley, 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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Missouri Valley, Iowa, USA

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