August weather forecastKey Biscayne, FL
August
Weather in August
The last month of the summer, August, is another hot month in Key Biscayne, Florida, with an average temperature ranging between min 82.6°F (28.1°C) and max 87.1°F (30.6°C).Temperature
August stands out as Key Biscayne's warmest month, with temperatures ranging between an average high of 87.1°F (30.6°C) and a low of 82.6°F (28.1°C).Heat index
August's heat index is estimated at a sweltering 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In August, the average relative humidity in Key Biscayne is 72%.Rainfall
August is the month with the most rainfall in Key Biscayne. Rain falls for 22.1 days and accumulates 2.8" (71mm) 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: When water's temperature exceeds 86°F (30°C), it arguably loses its primary appeal of offering a cool escape.
Daylight
In Key Biscayne, the average length of the day in August is 13h and 1min.On the first day of the month, sunrise is at 6:47 am and sunset at 8:06 pm. On the last day of August, sunrise is at 7:00 am and sunset at 7:40 pm EDT.
Sunshine
In August, the average sunshine is 10.6h.UV index
May through October, with an average maximum UV index of 7, are months with the highest UV index in Key Biscayne. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 7 in August translates into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Key Biscayne, FL
- Average high temperature in August: 87.1°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (73°F).
- Average low temperature in August: 82.6°F
The month with the highest average low temperature is August (82.6°F).
The coldest month (with the lowest average low temperature) is January (65.1°F).
Average pressure in August
Key Biscayne, FL
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).
Average wind speed in August
Key Biscayne, FL
- Average wind speed in August: 8.5mph
The windiest month (with the highest average wind speed) is March (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in August
Key Biscayne, FL
- Average humidity in August: 72%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (70%).
Average rainfall in August
Key Biscayne, FL
- Average rainfall in August: 2.8"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in August
Key Biscayne, FL
- Average rainfall days in August: 22.1 days
The month with the highest number of rainy days is September (24.5 days).
The month with the least rainy days is February (8.7 days).
Average sea temperature in August
Key Biscayne, FL
- Average sea temperature in August: 86.5°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).
Average daylight in August /
Average sunshine in August
Key Biscayne, 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 36min
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 24min).
Average sunshine days in August
Key Biscayne, FL
- Average sunshine days in August: 4.4 days
The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (3.2 days).
Average UV index in August
Key Biscayne, FL
- Average UV index in August: 7
The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January and December (UV index 5).
Average cloud cover in August
Key Biscayne, FL
- Average cloud cover in August: 29
The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility in August
Key Biscayne, 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).
