August weather forecast
Duck Key, FL

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Weather in August

August, the last month of the summer in Duck Key, is another warm month, with temperature in the range of an average low of 82.9°F (28.3°C) and an average high of 85.5°F (29.7°C).

Temperature

August tends to be the warmest month, with temperatures averaging a daily high of 85.5°F (29.7°C) and a low of 82.9°F (28.3°C).

Heat index

The heat index for August is estimated at a sweltering 95°F (35°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in August is 74%.

Rainfall

In August, the rain falls for 21 days. Throughout August, 3.31" (84mm) of precipitation is accumulated. In Duck Key, during the entire year, the rain falls for 186.2 days and collects up to 24.45" (621mm) of precipitation.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 86.5°F (30.3°C).
Note: The ideal feeling of cooling down in water can be lost when the temperature surpasses 86°F (30°C).

Daylight

The average length of the day in August is 12h and 59min.
On the first day of August in Duck Key, sunrise is at 6:52 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 7:42 pm EDT.

Sunshine

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

UV index

The months with the highest UV index in Duck Key are April through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in August transforms into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Caution! The Sun's UV intensity grows with reflections off sand and water.
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Frequently asked questions

What time of the year is the hottest in Duck Key?

August brings the highest temperatures in Duck Key, Florida, with an average high of 85.5°F (29.7°C) and an average low of 82.9°F (28.3°C).

How hot does it get in Duck Key in August?

The high-temperature in Duck Key during August is 85.5°F (29.7°C) and the low-temperature is 82.9°F (28.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is estimated at 95°F (35°C).

What is the average humidity in August in Duck Key?

In August, the average relative humidity in Duck Key is 74%.

How many days does it rain in August in Duck Key?

In August, the rain falls for 21 days. Throughout August, 3.31" (84mm) of precipitation is accumulated.

When is the ocean warmest in Duck Key?

The month with the warmest seawater is August, with an average ocean temperature of 86.5°F (30.3°C).

What is the ocean temperature in August in Duck Key?

In Duck Key, the average seawater temperature in August is 86.5°F (30.3°C). The water temperature above 86°F (30°C) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

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

In August, the average day length in Duck Key, Florida, 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 6:52 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 7:42 pm EDT.

How many hours of sunshine does Duck Key have in August?

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

What is the month with the highest UV index in Duck Key?

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

How high is the UV index in August in Duck Key?

The average daily maximum UV index in August in Duck Key, Florida, is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.

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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