December weather forecastMiami, FL

The stunning layout of the Miami Coast in Florida, USA

December

Weather in December

December in Miami, Florida displays pleasant weather conditions accompanied by comfortable temperatures and low rainfall. The distinctive attribute of December is the longest nights with an average length of 10.5 h. Relative to November, December is further cooler and drier, maintaining the city's reputation for having a mild winter. This weather pattern provides excellent conditions for outdoor activities and end-of-year festivities. This month wraps up the year on a pleasant note, providing a smooth transition into the new year.

Temperature

The arrival of December brings an average high-temperature of a still warm 75.7°F (24.3°C), subtly diverging from November's 77.9°F (25.5°C). Throughout December, Miami observes a steady low-temperature average of 69.4°F (20.8°C), reflecting a minor dip from daytime highs.

Humidity

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

Rainfall

In Miami, in December, it is raining for 11.7 days, with typically 0.75" (19mm) of accumulated 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 seawater temperature in December is 76.5°F (24.7°C).
Note: Your comfort in 76.5°F (24.7°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).

Daylight

With an average of 10h and 36min of daylight, December has the shortest days of the year.
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

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

UV index

January and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, the maximum UV index of 5 translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Stay sun-safe with clothing that is both closely woven and worn loosely. Alert! UV radiation becomes sharper due to reflections from sand and water.

Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Miami, 75.7°F (24.3°C) is the average high-temperature and 69.4°F (20.8°C) is the average low-temperature during December. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in October is estimated at 89.6°F (32°C).

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

In December, the average relative humidity is 75%.

In Miami, during December, the rain falls for 11.7 days and regularly aggregates up to 0.75" (19mm) of precipitation.

In Miami, in December, the average water temperature is 76.5°F (24.7°C). 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).

With an average of 10h and 36min of daylight, December has the shortest days of the year.

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

In December, on the first day of the month, 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.

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

In December, the average sunshine duration is 6.4h.

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

The average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

77.9°F

75.7°F

73°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.2mph

11.7mph

12.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

12.2

11.7

9.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

11.9

14.5

16.6

Average UV index

Average cloud cover

32%

33%

Average visibility

6mi

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).

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).

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).

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%).

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").

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).

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).

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

Average daylight in December: 10h and 36min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

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).

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).

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).

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).

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).