August weather forecast and climate
Captiva, FL

Weather in August

The last month of the summer, August, is another hot month in Captiva, Florida, with temperature in the range of an average low of 81°F (27.2°C) and an average high of 88°F (31.1°C).

Temperature

With an average high-temperature of 88°F (31.1°C) and an average low-temperature of 81°F (27.2°C), August is the warmest month.

Heat index

The average heat index in August is calculated to a torrid 101.8°F (38.8°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, pregnancy, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity is 73%.

Rainfall

The month with the most rainfall is August when the rain falls for 18.3 days and typically aggregates up to 1.93" (49mm) of precipitation.

Ocean temperature

With an average ocean temperature of 86°F (30°C), August is the month with the warmest seawater.
Note: For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

Daylight

The average length of the day in August is 13h.

Sunshine

In August, the average sunshine in Captiva is 9.7h.

UV index

Months with the highest UV index in Captiva are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 7 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the warmest month in Captiva?

With an average high-temperature of 88°F (31.1°C) and an average low-temperature of 81°F (27.2°C), August is the warmest month in Captiva.

What is the temperature in August in Captiva?

In August, in Captiva, the average high-temperature is 88°F (31.1°C), and the average low-temperature is 81°F (27.2°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines relative humidity and air temperature, is appraised at 101.8°F (38.8°C).

What is the average humidity in August in Captiva?

In Captiva, the average relative humidity in August is 73%.

How much does it rain in Captiva in August?

In Captiva, Florida, during August, the rain falls for 18.3 days and regularly aggregates up to 1.93" (49mm) of precipitation.

What is the wettest month in Captiva?

August is the month with the most rainfall. Rain falls for 18.3 days and accumulates 1.93" (49mm) of precipitation.

What is the month with the warmest ocean in Captiva?

The month with the warmest seawater in Captiva, Florida, is August, with an average ocean temperature of 86°F (30°C).

What is the ocean temperature in August in Captiva?

In August, the average ocean temperature in Captiva is 86°F (30°C). The surface water temperatures above 86°F (30°C) 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 Captiva?

In August, the average length of the day in Captiva, Florida, is 13h.

How long on average sun shines in August in Captiva?

In August, the average sunshine in Captiva is 9.7h.

When is the highest UV index in Captiva?

May through September, with an average maximum UV index of 7, are months with the highest UV index in Captiva.

What is the UV index intensity in August in Captiva?

In August, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in August
Captiva, FL

Average temperature in August - Captiva, FL
  • Average high temperature in August: 88°F

The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (70°F).

  • Average low temperature in August: 81°F

The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (58.8°F).

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Average pressure in August
Captiva, FL

Average pressure in August - Captiva, FL
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is September (29.95").

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Average wind speed in August
Captiva, FL

Average wind speed in August - Captiva, FL
  • Average wind speed in August: 7.3mph

The windiest months (with the highest average wind speed) are October and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

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Average humidity in August
Captiva, FL

Average humidity in August - Captiva, FL
  • Average humidity in August: 73%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in August
Captiva, FL

Average rainfall in August - Captiva, FL
  • Average rainfall in August: 1.93"

The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is March (0.16").

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Average rainfall days in August
Captiva, FL

Average rainfall days in August - Captiva, FL
  • Average rainfall days in August: 18.3 days

The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is February (4.1 days).

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Average sea temperature in August
Captiva, FL

Average sea temperature in August - Captiva, FL
  • Average sea temperature in August: 86°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (70°F).

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Average daylight in August /
Average sunshine in August
Captiva, FL

Average daylight in August / Average sunshine in August - Captiva, FL
  • Average daylight in August: 13h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in August: 9.7h

The month with the most sunshine is May (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in August
Captiva, FL

Average sunshine days in August - Captiva, FL
  • Average sunshine days in August: 7.5 days

The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is September (7.2 days).

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Average UV index in August
Captiva, FL

Average UV index in August - Captiva, FL
  • Average UV index in August: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
Months with the lowest UV index are January and February (UV index 5).

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Average cloud cover in August
Captiva, FL

Average cloud cover in August - Captiva, FL
  • Average cloud cover in August: 27

The month with the most cloud cover is January (Cloud cover 29).
Months with the least cloud cover are March and May (Cloud cover 23).

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Average visibility in August
Captiva, FL

Average visibility in August - Captiva, FL
  • Average visibility in August: 6mi

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

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