December weather forecastMiami Beach, FL
December
Weather in December
December brings Miami Beach a festive atmosphere, cooling down further from November. This month sees a record low sea temperature of 77°F (25°C), making it the coolest for sea swimming. The month is characterized by calm winds averaging around 11.1mph (17.9km/h) and generally comfortable weather. Despite fewer daylight hours—10.5 on average, Miami Beach still basks under sunshine for 6.4 hours a day. It's a unique experience to celebrate festivities in warmer weather on this beautiful beach city.Temperature
As Miami Beach welcomes December, the average high-temperature records at a still moderately hot 75.7°F (24.3°C), marking an insignificant deviation from the prior month. Miami Beach observes a consistent average low-temperature of 69.4°F (20.8°C) throughout December nights.Humidity
December is the most humid month, with an average relative humidity of 75%.Rainfall
In Miami Beach, during December, the rain falls for 11.7 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, in Miami Beach, there are 182.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Ocean temperature
In Miami Beach, in December, the average water temperature is 77°F (25°C).Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.
Daylight
With an average of 10h and 36min of daylight, December has the shortest days of the year in Miami Beach.On the first day of the month, sunrise is at 6:50 am and sunset at 5:29 pm. On the last day of December, sunrise is at 7:07 am and sunset at 5:40 pm EST.
Sunshine
The month with the least sunshine in Miami Beach 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 estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in December interprets into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Warning! The Sun's UV rays intensify with reflections from sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Miami Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, FL
- Average sea temperature in December: 77°F
The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest months (with the lowest average sea temperature) are January, February and March (75°F).
Average daylight in December /
Average sunshine in December
Miami Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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).
