August weather forecast
Duck Key, FL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Duck Key, Florida, with temperature in the range of an average low of 82.9°F and an average high of 85.5°F.

Temperature

Duck Key notes the warmest temperatures in August, with a high average of 85.5°F and a low of 82.9°F.

Heat index

The heat index in August is evaluated at a torrid 95°F. Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 hold great significance to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The average relative humidity in August is 74%.

Rainfall

In August, the rain falls for 21 days. Throughout August, 3.31" of precipitation is accumulated. In Duck Key, Florida, during the entire year, the rain falls for 186.2 days and collects up to 24.45" of precipitation.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 86.5°F.
Note: Cooling down in waters with temperatures over 86°F might not feel as satisfying.

Daylight

The average length of the day in August is 12h and 59min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:08 pm. On the last day of August, in Duck Key, sunrise is at 7:04 am and sunset at 7:43 pm EDT.

Sunshine

In Duck Key, Florida, the average sunshine in August is 10.1h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index in Duck Key. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In August, the maximum UV index of 7 transforms into these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight 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. Caution! Sand and water reflections can notably increase the UV radiation intensity.
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FAQ

What are the warmest months in Duck Key?

In Duck Key, August registers the highest temperatures, averaging 85.5°F at the peak and 82.9°F at the lowest.

How hot is August in Duck Key?

In Duck Key, in August, the average high-temperature is 85.5°F, and the average low-temperature is 82.9°F. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is evaluated at 95°F.

What is the average humidity in August in Duck Key?

The average relative humidity in August in Duck Key, Florida, is 74%.

How much does it rain in Duck Key in August?

In August, in Duck Key, the rain falls for 21 days. Throughout August, 3.31" of precipitation is accumulated.

What month is the ocean warmest in Duck Key?

August is the month with the warmest seawater in Duck Key, with an average ocean temperature of 86.5°F.

How warm is the water in August in Duck Key?

In August, the average ocean temperature in Duck Key, Florida, is 86.5°F. The surface water temperatures above 86°F are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

What is the average length of the day in August in Duck Key?

The average day length in August in Duck Key is 12h and 59min.

When is the sunrise / sunset in August in Duck Key?

In August, on the first day of the month, sunrise is at 6:51 am and sunset at 8:08 pm. On the last day of the month, in Duck Key, sunrise is at 7:04 am and sunset at 7:43 pm EDT.

How long on average sun shines in August in Duck Key?

In Duck Key, the average sunshine duration in August is 10.1h.

What are the months with the highest UV index in Duck Key?

The months with the highest UV index are April through October, with an average maximum UV index of 7.

What is the UV index intensity in August in Duck Key?

The average daily maximum UV index in August in Duck Key is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Duck Key, FL

Average temperature in August - Duck Key, FL
  • Average high temperature in August: 85.5°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.9°F).

  • Average low temperature in August: 82.9°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (67.5°F).

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Average pressure in August
Duck Key, FL

Average pressure in August - Duck Key, FL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).

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Average wind speed in August
Duck Key, FL

Average wind speed in August - Duck Key, FL
  • Average wind speed in August: 9.5mph

The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (9mph).

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Average humidity in August
Duck Key, FL

Average humidity in August - Duck Key, FL
  • Average humidity in August: 74%

The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in August
Duck Key, FL

Average rainfall in August - Duck Key, FL
  • Average rainfall in August: 3.31"

The wettest month (with the highest rainfall) is September (4.21").
The driest month (with the least rainfall) is March (0.43").

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Average rainfall days in August
Duck Key, FL

Average rainfall days in August - Duck Key, FL
  • Average rainfall days in August: 21 days

The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (10.3 days).

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Average sea temperature in August
Duck Key, FL

Average sea temperature in August - Duck Key, FL
  • Average sea temperature in August: 86.6°F

The best month for swimming (with the highest average sea temperature) is August (86.6°F).
The coldest months (with the lowest average sea temperature) are January and February (73.9°F).

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Average daylight in August /
Average sunshine in August
Duck Key, FL

Average daylight in August / Average sunshine in August - Duck Key, FL
  • Average daylight in August: 13h and 0min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in August
Duck Key, FL

Average sunshine days in August - Duck Key, FL
  • Average sunshine days in August: 7.3 days

The month with the most sunshine days is March (18 days).
The month with the least sunshine days is September (4.6 days).

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Average UV index in August
Duck Key, FL

Average UV index in August - Duck Key, FL
  • Average UV index in August: 7

The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).

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Average cloud cover in August
Duck Key, FL

Average cloud cover in August - Duck Key, FL
  • Average cloud cover in August: 28

The months with the most cloud cover are January and October (Cloud cover 32).
The month with the least cloud cover is April (Cloud cover 23).

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Average visibility in August
Duck Key, FL

Average visibility in August - Duck Key, FL
  • 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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Duck Key, Florida, USA

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