August weather forecast
Longboat Key, FL

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Weather in August

August, the last month of the summer in Longboat Key, is another hot month, with temperature in the range of an average high of 88.5°F (31.4°C) and an average low of 79.7°F (26.5°C).

Temperature

In Longboat Key, the highest average temperatures are observed in August, with a high of 88.5°F (31.4°C) and a low of 79.7°F (26.5°C).

Heat index

August's average heat index is evaluated at an extremely hot 104°F (40°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
In reference to the heat index, it's for places in shade and with a slight wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

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

Rainfall

The month with the most rainfall is August, when the rain falls for 26.8 days and typically aggregates up to 6.42" (163mm) of precipitation.

Ocean temperature

With an average ocean temperature of 86.7°F (30.4°C), August is the month with the warmest seawater.
Note: Many feel that waters warmer than 86°F (30°C) fail to offer the same rejuvenating touch.

Daylight

The average length of the day in August is 13h and 5min.
On the first day of August, sunrise is at 6:54 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:51 pm EDT.

Sunshine

The average sunshine in August is 9.6h.

UV index

The months with the highest UV index in Longboat Key are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during August leads to these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Warning! The reflection of sand and water increases the UV dose.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the hottest time of year?

Longboat Key notes the warmest temperatures in August, with a average high of 88.5°F (31.4°C) and a low of 79.7°F (26.5°C).

Is it hot in Longboat Key during August?

In August, the average high-temperature and low-temperature are 88.5°F (31.4°C) and 79.7°F (26.5°C) respectively. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 104°F (40°C).

What is the average humidity in August?

The average relative humidity in August in Longboat Key is 74%.

What is the rainiest month?

The month with the most rainfall is August, when the rain falls for 26.8 days and typically aggregates up to 6.42" (163mm) of precipitation.

How much does it rain in August?

In Longboat Key, in August, it is raining for 26.8 days, with typically 6.42" (163mm) of accumulated precipitation.

What is the month with the warmest ocean?

The month with the warmest seawater is August, with an average ocean temperature of 86.7°F (30.4°C).

How warm is the water in August?

In Longboat Key, in August, the average water temperature is 86.7°F (30.4°C). For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

What is the average length of the day in August?

The average day length in August is 13h and 5min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:54 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:51 pm EDT.

How long on average sun shines in August?

In Longboat Key, the average sunshine duration in August is 9.6h.

What are the months with the highest UV index?

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

What is the UV index intensity in August?

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

Average temperature in August
Longboat Key, FL

Average temperature in August - Longboat Key, FL
  • Average high temperature in August: 88.5°F

The warmest month (with the highest average high temperature) is August (88.5°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in August: 79.7°F

The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).

Average pressure in August
Longboat Key, FL

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

Average wind speed in August
Longboat Key, FL

Average wind speed in August - Longboat Key, FL
  • Average wind speed in August: 6.7mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

Average humidity in August
Longboat Key, FL

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

The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are March, April and May (72%).

Average rainfall in August
Longboat Key, FL

Average rainfall in August - Longboat Key, FL
  • Average rainfall in August: 6.42"

The wettest month (with the highest rainfall) is August (6.42").
The driest months (with the least rainfall) are February and November (1.06").

Average rainfall days in August
Longboat Key, FL

Average rainfall days in August - Longboat Key, FL
  • Average rainfall days in August: 26.8 days

The month with the highest number of rainy days is August (26.8 days).
The months with the least rainy days are January, February and November (8.3 days).

Average sea temperature in August
Longboat Key, FL

Average sea temperature in August - Longboat Key, FL
  • Average sea temperature in August: 86.7°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).

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

Average daylight in August / Average sunshine in August - Longboat Key, FL
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

Average sunshine days in August
Longboat Key, FL

Average sunshine days in August - Longboat Key, FL
  • Average sunshine days in August: 2.5 days

The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is August (2.5 days).

Average UV index in August
Longboat Key, FL

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

The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

Average cloud cover in August
Longboat Key, FL

Average cloud cover in August - Longboat Key, FL
  • Average cloud cover in August: 27

The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 22).

Average visibility in August
Longboat Key, FL

Average visibility in August - Longboat 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).

Longboat Key, Florida, USA

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