August weather forecast
Dismal Key, FL

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Weather in August

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

Temperature

Dismal Key's warmest temperatures are experienced in August, with average high temperatures of 88.3°F (31.3°C) and lows of 80.2°F (26.8°C).

Heat index

The heat index for August is computed to be a scorching 104°F (40°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
For clarity, heat index numbers account for light winds and areas under shade. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

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

Rainfall

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

Daylight

In Dismal Key, the average length of the day in August is 13h and 1min.
On the first day of August, 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.

Sunshine

In Dismal Key, the average sunshine in August 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 threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during August translates into these guidelines:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months?

Dismal Key's warmest month, August, generally records average temperatures ranging from a high of 88.3°F (31.3°C) to a low of 80.2°F (26.8°C).

How hot is it in August?

The high-temperature, in August, in Dismal Key, is 88.3°F (31.3°C), while the low-temperature averages to 80.2°F (26.8°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is computed to be 104°F (40°C).

What is the average humidity in August?

In August, the average relative humidity is 74%.

What is the rainiest month?

August is the month with the most rainfall. Rain falls for 22.4 days and accumulates 4.29" (109mm) of precipitation.

How much does it rain in August?

In Dismal Key, 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?

The average day length in August is 13h and 1min.

What time are sunrise and sunset in August in Dismal Key?

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 is 9.9h.

What is the month with the highest UV index?

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

How high is the UV index in August?

The average daily maximum UV index in August is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
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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