Weather in Key Biscayne, Key Biscayne, United States in December

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Visiting Key Biscayne, Key Biscayne, United States in December

December is one of the best months to visit Key Biscayne for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

December has average maximum temperatures of 26°C (78°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright. December has total rainfall of 4.7cm (1.8inches) making it predominantly dry with occasional light showers on very few days. There are just 9.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days. Sea temperatures are a warm 25°C (77°F). December is a good month for swimming in Key Biscayne with comfortable temperatures for most people.

Also consider visiting Key Biscayne in one of the other best months of January, March, November, for the best beach weather.

December is a mild and pleasant month, with cooler temperatures and lower humidity. Sunbathing and beach walks are popular, but swimming and water sports might be less enjoyable due to the cooler water temperatures. It's a great time for exploring the island and enjoying the natural beauty of Key Biscayne. Also consider one of our other suggestions for December.

Can you sunbathe in Key Biscayne in December?

Yes, December is a good time for sunbathing in Key Biscayne.

December has average maximum temperatures of 26°C (78°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright. December has total rainfall of 4.7cm (1.8inches) making it predominantly dry with occasional light showers on very few days. There are just 9.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

More about December temperature and sunshine.

Can you swim in Key Biscayne in December?

Yes, December is a good month for swimming in Key Biscayne with warm sea temperatures 25°C (77°F).

More about December sea temperatures.

Is December a good time to holiday in Key Biscayne?

Yes, December is a great time for a holiday in Key Biscayne.

December has average maximum temperatures of 26°C (78°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright. December has total rainfall of 4.7cm (1.8inches) making it predominantly dry with occasional light showers on very few days. There are just 9.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days. Sea temperatures are a warm 25°C (77°F). December is a good month for swimming in Key Biscayne with comfortable temperatures for most people.

More about the December temperatures and sunshine.

Is Key Biscayne warm in December?

Yes, Key Biscayne is very warm and perfect for sunbathing on clear days in December.

The average maximum temperature in Key Biscayne in December is 26°C (78°F). The average maximum temperature is 27°C (81°) in the previous month and 25°C (76°F) in the next month.

The average temperature in Key Biscayne in December is 22°C (72°F). The average temperature is 24°C (74°F) in the previous month and 21°C (69°F) in the next month.

More info about the December temperatures and sunshine.

How sunny is Key Biscayne in December?

The average day light hours per day in Key Biscayne in December are 10.5. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 7.1hrs making the days quite long and bright.

More about December sunshine.

Crowds in Key Biscayne in December

December sees a slight increase in crowds as holidaymakers visit Key Biscayne beach for a winter getaway. The temperatures average around 70°F (21°C), and the Christmas and New Year holidays can bring more visitors to the area. However, the beach is still less crowded compared to the peak summer months.

Temperature in Key Biscayne in December

The average maximum temperature in Key Biscayne in December is 26°C (78°F). The average maximum temperature is 27°C (81°F) in the previous month and 25°C (76°F) in the next month.

The average temperature in Key Biscayne in December is 22°C (72°F). The average temperature is 24°C (74°F) in the previous month and 21°C (69°F) in the next month.

The average minimum temperature in Key Biscayne in December is 18°C (64°F). The minimum temperature is 20°C (67°F) in the previous month and 16°C (61°F) in the next month.

Sunshine in Key Biscayne in December

During December the average day light hours are 10.5 per day in Key Biscayne. The sunshine percentage is 67% 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 in Key Biscayne in December is typically 5.3 during December. An ultraviolet index reading of 3 to 5 indicates there is a moderate risk of harm from unprotected sun exposure. Keep out of the sun during the strongest hours around midday when unprotected skin risks burning in less than 30 minutes. For the sensitive 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, and after swimming or sweating. Tanning for hours is possible with the right application of sun cream. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Key Biscayne in December

The average sea water temperature in Key Biscayne in December is 24.8°C (76.6°F) which is warm and pleasant for relaxing and swimming for long periods.

Rainfall in Key Biscayne in December

The average total rainfall in Key Biscayne in December is 4.7cm (1.8inches) and on average there are 9.2 rainy days in December making it a quite rainy time to visit the beach.

Humidity in Key Biscayne in December

The maximum dew point (an indicator of humidity) in Key Biscayne in December is 18°C (65°F) which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 19°C (66°F) in the previous month and 17°C (17°F) in the next month.

The average maximum relative humidity in Key Biscayne in December is typically 87.1%. The maximum relative humidity is 84.3% in the previous month and 86.3% in the next month.

The average relative humidity in Key Biscayne in December is typically 71%. The average relative humidity is 68.7% in the previous month and 69.6% in the next month.

Wind Speed in Key Biscayne in December

The average maximum wind speed in Key Biscayne in December is typically 26KM/H (16MPH). The average maximum wind speed is 26KM/H (16MPH) in the previous month and 26KM/H (16MPH) in the next month.

The average wind speed in Key Biscayne in December is typically 12KM/H (8MPH). The average wind speed is 13KM/H (8MPH) in the previous month and 12KM/H (8MPH) in the next month.

The average wind direction in Key Biscayne in December is from the East-Northeast.

Monthly Averages

Suggested Beaches in December

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.