Key Biscayne
Florida, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Key Biscayne, FL

The beautiful and dramatic landscape of the Miami Crandon Park in Key Biscayne, Florida, and a far view of the seascape
The beautiful and dramatic landscape of the Miami Crandon Park in Key Biscayne, Florida, and a far view of the seascape
January, the same as December, in Key Biscayne, Florida, is another pleasant winter month, with average temperature fluctuating between 73°F (22.8°C) and 65.1°F (18.4°C). January is the coldest month, with an average high-temperature of 73°F (22.8°C) and an average low-temperature of 65.1°F (18.4°C). Weather in January »

The last month of the winter, February, is a moderately hot month in Key Biscayne, Florida, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 67.5°F (19.7°C). In February, the average high-temperature is almost the same as in January - a moderately hot 74.5°F (23.6°C). Weather in February »

The first month of the spring, March, is still a warm month in Key Biscayne, Florida, with temperature in the range of an average low of 69.1°F (20.6°C) and an average high of 75.6°F (24.2°C). In Key Biscayne, the average high-temperature is essentially the same as in February - a still warm 75.6°F (24.2°C). Weather in March »

April, the same as March, is a moderately hot spring month in Key Biscayne, Florida, with average temperature ranging between max 79.3°F (26.3°C) and min 73.8°F (23.2°C). In April, the average high-temperature is relatively the same as in March - a still warm 79.3°F (26.3°C). Weather in April »

The last month of the spring, May, is also a moderately hot month in Key Biscayne, Florida, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 77°F (25°C). In May, the average high-temperature is almost the same as in April - a still warm 82°F (27.8°C). Weather in May »

June, the first month of the summer, in Key Biscayne, is also a moderately hot month, with average temperature varying between 80.2°F (26.8°C) and 84.7°F (29.3°C). In June, the average high-temperature is practically the same as in May - a still warm 84.7°F (29.3°C). Weather in June »

July is a tropical summer month in Key Biscayne, Florida, with average temperature fluctuating between 81.9°F (27.7°C) and 86.5°F (30.3°C). In Key Biscayne, the average high-temperature in July is essentially the same as in June - a hot 86.5°F (30.3°C). Weather in July »

August, the last month of the summer, in Key Biscayne, is also a hot month, with temperature in the range of an average high of 87.1°F (30.6°C) and an average low of 82.6°F (28.1°C). August is the warmest month, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 82.6°F (28.1°C). In August, the average heat index is evaluated at a torrid 98.8°F (37.1°C). Weather in August »

September, the first month of the autumn, in Key Biscayne, is still a warm month, with average temperature varying between 85.6°F (29.8°C) and 81°F (27.2°C). In September, the average high-temperature is almost the same as in August - a warm 85.6°F (29.8°C). Weather in September »

October, like September, in Key Biscayne, Florida, is another warm autumn month, with average temperature fluctuating between 77.5°F (25.3°C) and 82.8°F (28.2°C). In Key Biscayne, the average high-temperature is essentially the same as in September - a still moderately hot 82.8°F (28.2°C). Weather in October »

The last month of the autumn, November, is another warm month in Key Biscayne, Florida, with average temperature fluctuating between 77.9°F (25.5°C) and 72.3°F (22.4°C). In Key Biscayne, Florida, the average high-temperature is relatively the same as in October - a still moderately hot 77.9°F (25.5°C). Weather in November »

The first month of the winter, December, is also a moderately hot month in Key Biscayne, Florida, with average temperature ranging between min 69.4°F (20.8°C) and max 75.7°F (24.3°C). In December, the average high-temperature is relatively the same as in November - a still warm 75.7°F (24.3°C). Weather in December »

What is the coldest month in Key Biscayne?

The coldest month in Key Biscayne is January, with an average high-temperature of 73°F (22.8°C) and an average low-temperature of 65.1°F (18.4°C).

How many days does it rain in Key Biscayne?

In Key Biscayne, Florida, during the entire year, the rain falls for 182.7 days and collects up to 16.38" (416mm) of precipitation.

What is the driest month in Key Biscayne?

January is the month with the least rainfall in Key Biscayne, Florida. Rain falls for 9.2 days and accumulates 0.43" (11mm) of precipitation.

What is the month with the lowest UV index in Key Biscayne?

Months with the lowest UV index in Key Biscayne are January and December, with an average maximum UV index of 5.

What is the month with the coldest ocean in Key Biscayne?

The month with the coldest seawater in Key Biscayne, Florida, is February, with an average ocean temperature of 73.9°F (23.3°C).

What is the least humid month in Key Biscayne?

March is the least humid month in Key Biscayne, Florida, with an average relative humidity of 70%.

What is the month with the highest UV index in Key Biscayne?

Months with the highest UV index in Key Biscayne, Florida, are May through October, with an average maximum UV index of 7.

When are the longest days in Key Biscayne?

June has the longest days of the year, with an average of 13.7h of daylight.

What month has the most sunshine in Key Biscayne?

With an average of 11.1h of sunshine, July has the most sunshine of the year in Key Biscayne.

What is the warmest month in Key Biscayne?

The warmest month in Key Biscayne, Florida, is August, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 82.6°F (28.1°C).

What is the rainiest month in Key Biscayne?

The month with the most rainfall in Key Biscayne, Florida, is August when the rain falls for 22.1 days and typically aggregates up to 2.8" (71mm) of precipitation.

When is the ocean warmest in Key Biscayne?

August is the month with the warmest seawater in Key Biscayne, Florida, with an average ocean temperature of 86.5°F (30.3°C).

What is the most humid month in Key Biscayne?

December is the most humid month in Key Biscayne, Florida, with an average relative humidity of 75%.

What is the month with the shortest days in Key Biscayne?

With an average of 10.6h of daylight, December has the shortest days of the year in Key Biscayne.

What is the month with the least sunshine in Key Biscayne?

The month with the least sunshine in Key Biscayne, Florida, is December, with an average of 6.4h of sunshine.
Average temperature - Key Biscayne, FL
Average humidity - Key Biscayne, FL
Average rainfall - Key Biscayne, FL

The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the lowest rainfall) is January (0.43").

Average rainfall days - Key Biscayne, FL

The month with the highest number of rainy days is September (24.5 days).
The month with the lowest number of rainy days is February (8.7 days).

Average sea temperature - Key Biscayne, FL

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 / Average sunshine - Key Biscayne, FL

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

The month with most sunshine is July (Average sunshine: 11.1h).
The month with least sunshine is December (Average sunshine: 6.4h).

Average UV index - Key Biscayne, FL