August weather forecast
Dismal Key, FL

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Weather in August

The last month of the summer, August, is another hot month in Dismal Key, Florida, with an average temperature ranging between min 80.2°F (26.8°C) and max 88.3°F (31.3°C).

Temperature

August, with its average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 80.2°F (26.8°C), holds the record as the warmest month.

Heat index

For most parts of August, the heat index is computed to be a blisteringly hot 104°F (40°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. 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 keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In August, the average relative humidity is 74%.

Rainfall

The month with the most rainfall is August, when the rain falls for 22.4 days and typically aggregates up to 4.29" (109mm) of precipitation.

Daylight

The average length of the day in August is 13h and 1min.
On the first day of the month, sunrise is at 6:52 am and sunset at 8:12 pm. On the last day of August, sunrise is at 7:06 am and sunset at 7:46 pm EDT.

Sunshine

The average sunshine in August in Dismal Key is 9.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in August transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest?

With its average high temperature of 88.3°F (31.3°C) and a low of 80.2°F (26.8°C), August is regarded as the warmest month.

Is it hot during August?

In August, the average high-temperature and low-temperature are 88.3°F (31.3°C) and 80.2°F (26.8°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 104°F (40°C).

What is the average humidity in August?

The average relative humidity in August is 74%.

What is the rainiest month?

The month with the most rainfall is August, when the rain falls for 22.4 days and typically aggregates up to 4.29" (109mm) of precipitation.

How many days does it rain in August?

In Dismal Key, Florida, in August, during 22.4 rainfall days, 4.29" (109mm) of precipitation is typically accumulated.

What is the average length of the day in August?

In August, the average day length is 13h and 1min.

When are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:52 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 7:46 pm EDT.

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

The average sunshine duration in August in Dismal Key is 9.9h.

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?

The average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Dismal Key, FL

Average temperature in August - Dismal Key, FL
  • Average high temperature in August: 88.3°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (71.6°F).

  • Average low temperature in August: 80.2°F

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

Average pressure in August
Dismal Key, FL

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

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.94"Hg).

Average wind speed in August
Dismal Key, FL

Average wind speed in August - Dismal Key, FL
  • Average wind speed in August: 6.5mph

The windiest month (with the highest average wind speed) is November (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in August
Dismal Key, FL

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

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (72%).

Average rainfall in August
Dismal Key, FL

Average rainfall in August - Dismal Key, FL
  • Average rainfall in August: 4.29"

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is March (0.63").

Average rainfall days in August
Dismal Key, FL

Average rainfall days in August - Dismal Key, FL
  • Average rainfall days in August: 22.4 days

The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (7 days).

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

Average daylight in August / Average sunshine in August - Dismal 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: 9h and 5min

The months with the most sunshine are May and July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days in August
Dismal Key, FL

Average sunshine days in August - Dismal Key, FL
  • Average sunshine days in August: 6.8 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is August (6.8 days).

Average UV index in August
Dismal Key, FL

Average UV index in August - Dismal 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 months with the lowest UV index are January and February (UV index 5).

Average cloud cover in August
Dismal Key, FL

Average cloud cover in August - Dismal Key, FL
  • Average cloud cover in August: 26

The month with the most cloud cover is January (Cloud cover 28).
The months with the least cloud cover are March and April (Cloud cover 22).

Average visibility in August
Dismal Key, FL

Average visibility in August - Dismal 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).

Dismal Key, Florida, USA

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