Miami Weather in December
December's weather for Miami, Florida is mainly spectacular. The city basks in perfect temperatures with little rainfall. Although the climate is a little cloudier now than in other months. And it's been known to drop to freezing here at this time of year.
This page gives detailed information on the typical December temperature, precipitation, sun, humidity, wind and storms for Miami. The numbers here are historical averages based on climate data gathered at the Miami International Airport, located five miles west of downtown Miami.
Temperature
| 78 °F | December average high | 26 °C |
| 64 °F | December average low | 18 °C |
| 17 days | 80 °F max. or more (27 °C) |
| 9 days | 60 °F min. or less (16 °C) |
Nearly every December day warms to over 70 degrees Fahrenheit (21 degrees Celsius) in Miami. Temperatures above 90 °F (32 °C) are not expected here this month.
The thermometer dips to 50 °F (10 °C) or below on an average of two nights this month. About once a decade December does get as cold as 40 °F (4 °C).
Rain
| 2.4 in | total precipitation | 62 mm |
| 8 days | of rain |
Half the time, Miami receives 0.9 to 3.1 inches (23 to 79 mm) of rainfall in December. One in four years has drier weather, while another one in four is wetter.
Sun
| 63 % | sunshine |
| 9 days | clear skies |
December is the cloudiest month for Miami. The sun's rays reach the ground in Miami during 63 percent of daylight hours on average, for a total of 206 hours in the month. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in December at Miami averages 10 hours and 33 minutes a day. The shortest days of the year, from around December 15th to 27th, last 10 hours and 32 minutes from sunrise to sunset.
Humidity
| 73 % | December average humidity |
The relative humidity in Miami during December usually peaks at 83 percent in the morning then drops to 59 percent by early afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm | Humidity % | 80 | 83 | 83 | 69 | 59 | 60 | 70 | 76 |
Wind
| 9.1 mph | December wind speed average | 14.6 kph |
December is less windy than most other months in Miami.
Storms
| 1 day | rainfall of 0.5 inches (13 mm) or more |
| 1 day | with thunderstorms in December |
Reference
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.