Key West
Florida, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Key West, FL

A beach pier in Key West, Florida, with palm trees in the background
A beach pier in Key West, Florida, with palm trees in the background
December is a month in the dry season and is the onset of the mild winter. The average temperatures are in the high 60°F (15.6°C) and 70°F (21.1°C) with a few rainy days.
Key West enjoys an influx of visitors who do not mind paying a high price for fantastic weather compared to the rest of the United States during the winter. The picturesque turquoise water in the serene surroundings makes it one of the best tourist places with an abundance of sunshine hours in December.

What is the temperature in Diciembre in Key West?

In Diciembre, in Key West, Florida, the average high-temperature is 75.9°F (24.4°C), and the average low-temperature is 66.9°F (19.4°C).

What is the most humid month in Key West?

Diciembre is the most humid month, with an average relative humidity of 76.2%.

What is the average humidity in Diciembre in Key West?

In Key West, Florida, the average relative humidity in Diciembre is 76.2%.

How many days does it rain in Diciembre in Key West?

In Key West, Florida, during Diciembre, the rain falls for 6.4 days and regularly aggregates up to 1.77" (45mm) of precipitation.

What is the water temperature in Diciembre in Key West?

In Key West, in Diciembre, the average water temperature is 74.5°F (23.6°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 74.5°F (23.6°C) water may be enjoyable.

What is the month with the shortest days in Key West?

The month with the shortest days in Key West is Diciembre, with an average of 10.6h of daylight.

What is the average length of the day in Diciembre in Key West?

In Key West, the average length of the day in Diciembre is 10.6h.

What is the month with the least sunshine in Key West?

With an average of 7.6h of sunshine, Diciembre has the least sunshine of the year in Key West, Florida.

How many hours of sunshine does Key West have in Diciembre?

In Diciembre, the average sunshine in Key West is 7.6h.

What is the month with the lowest UV index in Key West?

Enero and Diciembre, with an average maximum UV index of 6, are months with the lowest UV index.

How high is the UV index in Diciembre in Key West?

In Diciembre, the average daily maximum UV index in Key West, Florida, is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Key West, FL
  • Average high temperature in December: 76°F

The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is January (74.3°F).

  • Average low temperature in December: 66.9°F

The month with the highest average low temperature is July (79.8°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

Average humidity in December - Key West, FL
  • Average humidity in December: 76.2%

The month with the highest relative humidity is December (76.2%).
The month with the lowest relative humidity is April (70.1%).

Average rainfall in December - Key West, FL
  • Average rainfall in December: 1.8"

The wettest month (with the highest rainfall) is September (6.5").
The driest month (with the lowest rainfall) is March (1.6").

Average rainfall days in December - Key West, FL
  • Average rainfall days in December: 6.4 days

The month with the highest number of rainy days is September (16.2 days).
The month with the lowest number of rainy days is April (4.5 days).

Average sea temperature in December - Key West, FL
  • Average sea temperature in December: 74.5°F

The best month for swimming (with the highest average sea temperature) is August (86.9°F).
Coldest months (with the lowest average sea temperature) are January and February (71.2°F).

Average daylight in December / Average sunshine in December - Key West, FL
  • Average daylight in December: 10.6h

The month with the longest days is June (Average daylight: 13.6h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in December: 7.6h

The month with most sunshine is May (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 7.6h).

Average UV index in December - Key West, FL
  • Average UV index in December: 6

Months with the highest UV index are April, May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 6).