August weather forecast
Swan, IA

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Weather in August

The last month of the summer, August, is another warm month in Swan, Iowa, with an average temperature fluctuating between 81.3°F (27.4°C) and 62.6°F (17°C).

Temperature

Swan notes an average high-temperature of a still moderately hot 81.3°F (27.4°C) in August, displaying minor variation from July. Swan in August experiences a low-temperature average of 62.6°F (17°C).

Heat index

In August, the average heat index is appraised at a tropical 87.8°F (31°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.
Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

In August, the average relative humidity in Swan is 79%.

Rainfall

In Swan, in August, during 11.5 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 109.9 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in August in Swan, Iowa, is 13h and 47min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:30 pm. On the last day of August, in Swan, Iowa, sunrise is at 6:39 am and sunset at 7:47 pm CDT.

Sunshine

The average sunshine in August is 9.8h.

UV index

The months with the highest UV index in Swan are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in August transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full 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

What is the temperature in August in Swan?

August temperatures in Swan, Iowa, vary between a high-temperature of 81.3°F (27.4°C) and a low-temperature of 62.6°F (17°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 87.8°F (31°C).

What is the average humidity in August in Swan?

The average relative humidity in August is 79%.

How many days does it rain in August in Swan?

In Swan, in August, it is raining for 11.5 days, with typically 1.26" (32mm) of accumulated precipitation.

When it does not snow in Swan?

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

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

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

What time are sunrise and sunset in August in Swan?

On the first day of August in Swan, sunrise is at 6:08 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:47 pm CDT.

How long on average sun shines in August in Swan?

In Swan, the average sunshine duration in August is 9.8h.

What is the month with the highest UV index in Swan?

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

What is the UV index reading in August in Swan?

In August, the average daily maximum UV index in Swan is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health 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
Swan, IA

Average temperature in August - Swan, IA
  • Average high temperature in August: 81.3°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in August: 62.6°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

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Average pressure in August
Swan, IA

Average pressure in August - Swan, IA
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in August
Swan, IA

Average wind speed in August - Swan, IA
  • Average wind speed in August: 6.8mph

The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

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Average humidity in August
Swan, IA

Average humidity in August - Swan, IA
  • Average humidity in August: 79%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Swan, IA

Average rainfall in August - Swan, IA
  • Average rainfall in August: 1.26"

The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and December (0.39").

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Average rainfall days in August
Swan, IA

Average rainfall days in August - Swan, IA
  • Average rainfall days in August: 11.5 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in August
Swan, IA

Average snowfall in August - Swan, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Swan, IA

Average snowfall days in August - Swan, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.8 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
Swan, IA

Average daylight in August / Average sunshine in August - Swan, 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 30min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in August
Swan, IA

Average sunshine days in August - Swan, IA
  • Average sunshine days in August: 16.4 days

The month with the most sunshine days is December (22.7 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in August
Swan, IA

Average UV index in August - Swan, IA
  • 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
Swan, IA

Average cloud cover in August - Swan, IA
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 29).

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Average visibility in August
Swan, IA

Average visibility in August - Swan, IA
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

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Swan, Iowa, USA

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