December weather forecast
Miami, FL

The stunning layout of the Miami Coast in Florida, USA
The stunning layout of the Miami Coast in Florida, USA

Weather in December

December, the first month of the winter in Miami, is still a warm month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 69.4°F (20.8°C).

Temperature

In December, the average high-temperature is almost the same as in November - a still moderately hot 75.7°F (24.3°C). In December, in Miami, the average low-temperature is 69.4°F (20.8°C).

Humidity

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

Rainfall

In Miami, during December, the rain falls for 11.7 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Miami, Florida, during the entire year, the rain falls for 182.7 days and collects up to 16.38" (416mm) of precipitation.

Ocean temperature

In Miami, the average water temperature is 76.5°F (24.7°C).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.5°F (24.7°C) water. (FYI: The Olympic swimming competition requires a water temperature between 77°F (25°C) and 82.4°F (28°C).)

Daylight

The month with the shortest days is December, with an average of 10h and 34min of daylight.
On the first day of December, sunrise is at 6:50 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:40 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 6.4h of sunshine.

UV index

January and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Miami?

In Miami, Florida, in December, the average high-temperature is 75.7°F (24.3°C), and the average low-temperature is 69.4°F (20.8°C). in October, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 89.6°F (32°C).

What is the most humid month in Miami?

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

What is the average humidity in December in Miami?

The average relative humidity in December in Miami is 75%.

How much does it rain in Miami in December?

In Miami, in December, during 11.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How warm is the water in December in Miami?

In Miami, the average seawater temperature in December is 76.5°F (24.7°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.5°F (24.7°C) water may be enjoyable.

What is the month with the shortest days in Miami?

With an average of 10h and 34min of daylight, December has the shortest days of the year in Miami, Florida.

What is the average length of the day in December in Miami?

In December, the average day length in Miami, Florida, is 10h and 34min.

When are sunrise and sunset in December in Miami?

On the first day of December, sunrise is at 6:50 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:40 pm EST.

What is the month with the least sunshine in Miami?

With an average of 6.4h of sunshine, December has the least sunshine of the year in Miami.

How long on average sun shines in December in Miami?

In December, the average sunshine duration in Miami is 6.4h.

What is the month with the lowest UV index in Miami?

The months with the lowest UV index in Miami, Florida, are January and December, with an average maximum UV index of 5.

What is the UV index reading in December in Miami?

In Miami, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.

Average temperature in December
Miami, FL

Average temperature in December - Miami, FL
  • Average high temperature in December: 75.7°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 December: 69.4°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).

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Average pressure in December
Miami, FL

Average pressure in December - Miami, FL
  • Average pressure in December: 30.08"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).

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Average wind speed in December
Miami, FL

Average wind speed in December - Miami, FL
  • Average wind speed in December: 11.1mph

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).

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Average humidity in December
Miami, FL

Average humidity in December - Miami, FL
  • Average humidity in December: 75%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in December
Miami, FL

Average rainfall in December - Miami, FL
  • Average rainfall in December: 0.75"

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

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Average rainfall days in December
Miami, FL

Average rainfall days in December - Miami, FL
  • Average rainfall days in December: 11.7 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).

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Average sea temperature in December
Miami, FL

Average sea temperature in December - Miami, FL
  • Average sea temperature in December: 76.4°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).

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Average daylight in December /
Average sunshine in December
Miami, FL

Average daylight in December / Average sunshine in December - Miami, FL
  • Average daylight in December: 10h and 34min

The month with the longest days is June (Average daylight: 13h and 43min).
The month with the shortest days is December (Average daylight: 10h and 34min).

  • Average sunshine in December: 6h and 24min

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).

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Average sunshine days in December
Miami, FL

Average sunshine days in December - Miami, FL
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (3.2 days).

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Average UV index in December
Miami, FL

Average UV index in December - Miami, FL
  • Average UV index in December: 5

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).

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Average cloud cover in December
Miami, FL

Average cloud cover in December - Miami, FL
  • Average cloud cover in December: 32

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

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Average visibility in December
Miami, FL

Average visibility in December - Miami, FL
  • Average visibility in December: 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).

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