December weather forecast and climate
Key Largo, FL

A clear seascape and cloudy evening sky in Key Largo, Florida
A clear seascape and cloudy evening sky in Key Largo, Florida

What is the temperature in December in Key Largo?

In December, in Key Largo, the average high-temperature is 77°F (25°C), and the average low-temperature is 59°F (15°C).

How many days does it rain in December in Key Largo?

In December, in Key Largo, Florida, the rain falls for 6 days. Throughout December, 1.4" (36mm) of precipitation is accumulated.

What is the water temperature in December in Key Largo?

The average seawater temperature, in December, in Key Largo, is 75.4°F (24.1°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.4°F (24.1°C) water may be enjoyable. The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).
Average temperature in December - Key Largo, FL
  • Average high temperature in December: 77°F

Warmest months (with the highest average high temperature) are July, August and September (90°F).
The month with the lowest average high temperature is January (75°F).

  • Average low temperature in December: 59°F

Months with the highest average low temperature are July, August and September (73°F).
Coldest months (with the lowest average low temperature) are January and February (57°F).

Average rainfall in December - Key Largo, FL
  • Average rainfall in December: 1.4"

The wettest month (with the highest rainfall) is June (10").
The driest month (with the lowest rainfall) is December (1.4").

Average rainfall days in December - Key Largo, FL
  • Average rainfall days in December: 6 days

Months with the highest number of rainy days are August and September (17 days).
The month with the lowest number of rainy days is April (5 days).

Average sea temperature in December - Key Largo, FL
  • Average sea temperature in December: 75.4°F

The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is February (72.6°F).

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

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in December: 7h

Months with most sunshine are April, May, June and July (Average sunshine: 10h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in December - Key Largo, FL
  • Average UV index in December: 5

Months with the highest UV index are April, May, June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 5).

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