December weather forecast and climate
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 average temperature varying between 69.4°F (20.8°C) and 75.7°F (24.3°C).

Temperature

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

Humidity

December is the most humid month in Miami, 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, 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: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.5°F (24.7°C).

Daylight

December has the shortest days of the year in Miami, with an average of 10.5h of daylight.

Sunshine

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

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 5 in December transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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).

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 December, the rain falls for 11.7 days. Throughout December, 0.75" (19mm) of precipitation is accumulated.

How warm is the water in December in Miami?

In December, the average ocean temperature in Miami, Florida, 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?

The month with the shortest days is December, with an average of 10.5h of daylight.

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

In December, the average length of the day is 10.5h.

What is the month with the least sunshine in Miami?

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

How long on average sun shines in December in Miami?

The average sunshine in December is 6.4h.

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

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

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 reading of 3 to 5 represents a moderate health threat from unsafe exposure to the 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"

The month with the highest atmospheric pressure is January (30.11").
Months with the lowest atmospheric pressure are September and October (29.95").

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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: 10.5h

The month with the longest days is June (Average daylight: 13.7h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in December: 6.4h

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

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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

Months with the highest UV index are May, June, July, August, September and October (UV index 7).
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

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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