Weather in Key Biscayne, United States in May

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Visiting Key Biscayne, United States in May

The weather in May is marginally warmer than the previous month and temperatures continue to rise slightly into June. May has average maximum temperatures of 31°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 64% making it sunny but overcast at times. The hours of sunshine per day are 8.6hrs making the days long and bright. It is a good time for sunbathing in Key Biscayne.

May has total rainfall of 17.5cm (6.9inches) making it often dry with only moderate showers. There are only 12.2 days with some rainfall so you can still enjoy the beach on the many clear days.

Sea temperatures are a very warm 28°C (82°F). May is an excellent month for swimming in Key Biscayne with very comfortable temperatures for bathing all day. The sea temperature in May is significantly warmer than the previous month and temperatures continue to rise slightly into June.

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

Can you sunbathe in Key Biscayne in May?

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

May has average maximum temperatures of 31°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 64% making it sunny but overcast at times. The hours of sunshine per day are 8.6hrs making the days long and bright. May has total rainfall of 17.5cm (6.9inches) making it often dry with only moderate showers. There are only 12.2 days with some rainfall so you can still enjoy the beach on the many clear days.

More about May temperature and sunshine.

Can you swim in Key Biscayne in May?

Yes, May is an excellent month for swimming in Key Biscayne with very warm sea temperatures 28°C (82°F).

More about May sea temperatures.

Is May a good time to holiday in Key Biscayne?

Yes, May is a good time for a holiday in Key Biscayne.

May has average maximum temperatures of 31°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 64% making it sunny but overcast at times. The hours of sunshine per day are 8.6hrs making the days long and bright. May has total rainfall of 17.5cm (6.9inches) making it often dry with only moderate showers. There are only 12.2 days with some rainfall so you can still enjoy the beach on the many clear days. It is a good time for sunbathing in Key Biscayne. Sea temperatures are a very warm 28°C (82°F). May is an excellent month for swimming in Key Biscayne with very comfortable temperatures for bathing all day.

More about the May temperatures and sunshine.

Is Key Biscayne warm in May?

Yes, Key Biscayne is very hot and perfect for sunbathing on clear days in May.

The average maximum temperature in Key Biscayne in May is 31°C (87°F). The average maximum temperature is 29°C (84°) in the previous month and 32°C (90°F) in the next month.

The average temperature in Key Biscayne in May is 27°C (80°F). The average temperature is 25°C (77°F) in the previous month and 28°C (83°F) in the next month.

More info about the May temperatures and sunshine.

How sunny is Key Biscayne in May?

The average day light hours per day in Key Biscayne in May are 13.4. The sunshine percentage is 64% making it sunny but overcast at times. The hours of sunshine per day are 8.6hrs making the days long and bright.

More about May sunshine.

Temperature in Key Biscayne in May

The weather in May is marginally warmer than the previous month and temperatures continue to rise slightly into June. The average maximum temperature in Key Biscayne in May is 31°C (87°F). The average maximum temperature is 29°C (84°F) in the previous month and 32°C (90°F) in the next month.

The average temperature in Key Biscayne in May is 27°C (80°F). The average temperature is 25°C (77°F) in the previous month and 28°C (83°F) in the next month.

The average minimum temperature in Key Biscayne in May is 23°C (73°F). The minimum temperature is 21°C (69°F) in the previous month and 25°C (76°F) in the next month.

Sunshine in Key Biscayne in May

The days in May are longer than the previous month and the days continue to get marginally longer into June. May has slightly less hours of sunshine than the previous month. During May the average day light hours are 13.4 per day in Key Biscayne. The sunshine percentage is 64% making it sunny but overcast at times. The hours of sunshine per day are 8.6hrs making the days long and bright.

The ultraviolet index in Key Biscayne in May is typically 12.2 during May. 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.

Sea Temperature in Key Biscayne in May

The average sea water temperature in Key Biscayne in May is 27.7°C (81.9°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in May is significantly warmer than the previous month and temperatures continue to rise slightly into June.

Rainfall in Key Biscayne in May

May weather is much wetter than the previous month and rainfall continues to rise at a fast pace into June. May has a few more days of rain than the previous month and rainy days continue to rise quickly into June. The average total rainfall in Key Biscayne in May is 17.5cm (6.9inches) and on average there are 12.2 rainy days in May making it a pretty wet time to visit the beach.

Humidity in Key Biscayne in May

The maximum dew point (an indicator of humidity) in Key Biscayne in May is 21°C (71°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 20°C (67°F) in the previous month and 24°C (24°F) in the next month.

The average maximum relative humidity in Key Biscayne in May is typically 83%. The maximum relative humidity is 82.3% in the previous month and 87.3% in the next month.

The average relative humidity in Key Biscayne in May is typically 67.7%. The average relative humidity is 65.9% in the previous month and 72.2% in the next month.

Wind Speed in Key Biscayne in May

The average maximum wind speed in Key Biscayne in May is typically 29KM/H (18MPH). The average maximum wind speed is 29KM/H (18MPH) in the previous month and 30KM/H (18MPH) in the next month.

The average wind speed in Key Biscayne in May is typically 14KM/H (9MPH). The average wind speed is 15KM/H (9MPH) in the previous month and 12KM/H (7MPH) in the next month.

The average wind direction in Key Biscayne in May is from the East-Southeast.

Monthly Averages

Suggested Beaches in May

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Need Inspiration?

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