Annual average weather for Key Biscayne, United States

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Annual Average Weather for Key Biscayne, United States

The annual average maximum daily temperature is 29.0°C (84.2°F) which is very warm and perfect for sunbathing on clear days. The annual average water temperature is typically 26.4°C (79.5°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 13.7 days of rain per month and 8.1 hours of sun per day.

When is the best time to visit Key Biscayne?

The best months to visit Key Biscayne are January, March, November, December, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The weather is perfect for sunbathing in the months from March to November when the maximum temperature reaches above 26°C (72°F)

The sea is best for swimming between May and November when the sea temperature is above the average 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.

Can you sunbathe in Key Biscayne year round?

Yes, you can sunbathe in Key Biscayne all year round.

The weather is best for sunbathing in the months from March to November when the maximum temperature reaches above 26°C (72°F)

More info about the annual temperatures and sunshine.

Can you swim in Key Biscayne year round?

Yes, you can swim in Key Biscayne all year round.

The warmest sea water temperatures in Key Biscayne are found in July when they peak at 29°C (85°F) and lowest in January when they dip to 23°C (74°F).

The sea temperature is above average for swimming between May and November when the sea temperature is above 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures

When is the hottest month in Key Biscayne?

The hottest month in Key Biscayne is August when the average maximum temperature is very hot and perfect for sunbathing on clear days 33°C (91°F), average temperature is 29°C (85°F) and average minimum temperature is 26°C (78°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Key Biscayne?

The coolest month in Key Biscayne is January when the average maximum temperature is 25°C (76°F), average temperature is 21°C (69°F) and average minimum temperature is 16°C (61°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Key Biscayne?

The sunniest days in Key Biscayne are in April which has the most hours of sunshine per day. In April the sunshine percentage is 75% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.6hrs making the days long and bright.

More info about the annual sunshine.

When is the least sunny month in Key Biscayne?

December has the least sunshine. In December the sunshine percentage is 61% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright.

More info about the annual sunshine.

When is the driest month in Key Biscayne?

The driest month in Key Biscayne is January with 3.4cm (1.3inches) of rain and February has the fewest days of rain with 7.2 days with some rain, a quite rainy time to visit the beach.

More info about the annual rainfall

When is the wettest month in Key Biscayne?

The wettest month in Key Biscayne is June with 33.6cm (13.2inches) of rain and September has the most days of rain with 23 days with some rain, a very wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in Key Biscayne?

The coldest sea water temperatures in Key Biscayne are found in January when they dip to 23°C (74°F) which is warm and pleasant for relaxing and swimming for long periods.

More info about the annual sea temperatures.

When is the sea the warmest in Key Biscayne?

The warmest sea water temperatures in Key Biscayne are found in July when they peak at 29°C (85°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the most humid month in Key Biscayne?

The most humid month in Key Biscayne is August with a dew point (an indicator of humidity) of 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

More info about the annual humidity.

When is the least humid month in Key Biscayne?

The least humid month in Key Biscayne is January with a dew point of 17°C (62°F) which is OK for most but slightly uncomfortable for some.

More info about the annual humidity.

When is the windiest month in Key Biscayne?

The most windy month in Key Biscayne is June when the average maximum windspeed is 30KM/H (18MPH) and the average wind speed is 12KM/H (7MPH).

More info about the annual wind conditions.

Annual Temperature for Key Biscayne

The hottest month in Key Biscayne is August when the average maximum temperature is 33°C (91°F), average temperature is 29°C (85°F) and average minimum temperature is 26°C (78°F).

The coolest month in Key Biscayne is January when the average maximum temperature is 25°C (25°F), average temperature is 21°C (69°F) and average minimum temperature is 16°C (61°F).

Annual Sunshine for Key Biscayne

The longest days in Key Biscayne are in June, with an average of 13.7 hours of daylight per day. December has the shortest days with an average of 10.5 hours of daylight per day.

The sunniest days in Key Biscayne are in April which has the most hours of sunshine per day. The sunshine percentage is 75% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.6hrs making the days long and bright.

December has the least sunshine. The sunshine percentage is 61% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright.

The ultraviolet index is the highest in July when it reaches 12.4 and lowest in December when it reaches 5.3.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for Key Biscayne

The warmest sea water temperatures in Key Biscayne are found in July when they peak at 29°C (85°F) and lowest in January when they dip to 23°C (74°F).

The sea is best for swimming between May and November when the temperature is above 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.

Annual Rainfall for Key Biscayne

The wettest month in Key Biscayne is June with 33.6cm (13.2inches) of rain and September has the most days of rain with 23 days with some rain, a very wet time to visit the beach.

The driest month in Key Biscayne is January with 3.4cm (1.3inches) of rain and February has the fewest days of rain with 7.2 days with some rain, a quite rainy time to visit the beach.

Annual Humidity for Key Biscayne

The most humid month in Key Biscayne is August with a dew point (an indicator of humidity) of 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

The least humid month in Key Biscayne is January with a dew point of 17°C (62°F) which is OK for most but slightly uncomfortable for some.

Annual Wind Speed for Key Biscayne

The most windy month in Key Biscayne is June when the average maximum windspeed is 30KM/H (18MPH) and the average wind speed is 12KM/H (7MPH).

The least windy month in Key Biscayne is December when the average maximum windspeed is 26KM/H (16MPH) and the average wind speed is 12KM/H (8MPH).

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