August weather forecast and climate
Winterset, IA

A historic Hogback Covered Bridge in Winterset in Madison County, within Iowa
A historic Hogback Covered Bridge in Winterset in Madison County, within Iowa

Weather in August

August, the last month of the summer, in Winterset, is another warm month, with temperature in the range of an average low of 62.6°F (17°C) and an average high of 81.5°F (27.5°C).

Temperature

In Winterset, Iowa, the average high-temperature is relatively the same as in July - a still warm 81.5°F (27.5°C). In Winterset, in August, the average low-temperature is 62.6°F (17°C).

Heat index

The average heat index in August is evaluated at a hot 87.4°F (30.8°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, wind, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity is 79%.

Rainfall

In Winterset, during August, the rain falls for 13.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Winterset, during the entire year, the rain falls for 133 days and collects up to 26.14" (664mm) of precipitation.

Snowfall

In Winterset snow does not fall in June through September.

Daylight

In August, the average length of the day in Winterset is 13.8h.

Sunshine

The average sunshine in Winterset is 9.9h.

UV index

Months with the highest UV index in Winterset, Iowa, are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Winterset?

In Winterset, in August, the average high-temperature is 81.5°F (27.5°C), and the average low-temperature is 62.6°F (17°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is evaluated at 87.4°F (30.8°C).

What is the average humidity in August in Winterset?

The average relative humidity in August in Winterset, Iowa, is 79%.

How many days does it rain in August in Winterset?

In Winterset, Iowa, in August, it is raining for 13.7 days, with typically 2.6" (66mm) of accumulated precipitation.

When it does not snow in Winterset?

In Winterset, Iowa, snow does not fall in June through September.

How many hours of daylight does Winterset have in August?

In August, the average length of the day in Winterset is 13.8h.

How long on average sun shines in August in Winterset?

In August, the average sunshine in Winterset, Iowa, is 9.9h.

What are the months with the highest UV index in Winterset?

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

How high is the UV index in August in Winterset?

The average daily maximum UV index in August in Winterset, Iowa, is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in August
Winterset, IA

Average temperature in August - Winterset, IA
  • Average high temperature in August: 81.5°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (28.8°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 (15.3°F).

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Average pressure in August
Winterset, IA

Average pressure in August - Winterset, IA
  • Average pressure in August: 29.96"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in August
Winterset, IA

Average wind speed in August - Winterset, IA
  • Average wind speed in August: 7mph

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in August
Winterset, IA

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

Months with the highest relative humidity are January, February and June (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Winterset, IA

Average rainfall in August - Winterset, IA
  • Average rainfall in August: 2.6"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.91").

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Average rainfall days in August
Winterset, IA

Average rainfall days in August - Winterset, IA
  • Average rainfall days in August: 13.7 days

The month with the highest number of rainy days is June (17.9 days).
Months with the least rainy days are January and February (3.8 days).

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Average snowfall in August
Winterset, IA

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

The month with the highest snowfall is February (4.53").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Winterset, IA

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

The month with the highest number of snowfall days is January (9.1 days).
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
Winterset, IA

Average daylight in August / Average sunshine in August - Winterset, IA
  • Average daylight in August: 13.8h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in August: 9.9h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4.4h).

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Average sunshine days in August
Winterset, IA

Average sunshine days in August - Winterset, IA
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index in August
Winterset, IA

Average UV index in August - Winterset, IA
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
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
Winterset, IA

Average cloud cover in August - Winterset, IA
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 52).
Months with the least cloud cover are July and September (Cloud cover 29).

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Average visibility in August
Winterset, IA

Average visibility in August - Winterset, IA
  • Average visibility in August: 6mi

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

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