December weather forecast
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

Weather in December

The first month of the winter, December, is also a moderately hot month in Key Largo, Florida, with an average temperature fluctuating between 71.1°F (21.7°C) and 75.2°F (24°C).

Temperature

In Key Largo, the average high-temperature in December is relatively the same as in November - a still warm 75.2°F (24°C). The average low-temperature, in Key Largo, Florida, is 71.1°F (21.7°C).

Humidity

The months with the highest humidity in Key Largo are February, June and December, with an average relative humidity of 76%.

Rainfall

In Key Largo, in December, during 12.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Key Largo, during the entire year, the rain falls for 190.1 days and collects up to 27.05" (687mm) of precipitation.

Ocean temperature

In Key Largo, in December, the average water temperature is 76.3°F (24.6°C).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.3°F (24.6°C) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

December has the shortest days of the year, with an average of 10h and 37min of daylight.
On the first day of the month, sunrise is at 6:49 am and sunset at 5:31 pm. On the last day of December, in Key Largo, Florida, sunrise is at 7:06 am and sunset at 5:42 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 6.4h of sunshine.

UV index

The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in December in Key Largo?

The average high-temperature, in December, in Key Largo, is 75.2°F (24°C), while the average low-temperature is 71.1°F (21.7°C). in October, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 87.8°F (31°C).

What is the most humid month in Key Largo?

February, June and December, with an average relative humidity of 76%, are most humid months in Key Largo.

What is the average humidity in December in Key Largo?

The average relative humidity in December in Key Largo, Florida, is 76%.

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

In Key Largo, Florida, during December, the rain falls for 12.5 days and regularly aggregates up to 0.91" (23mm) of precipitation.

What is the water temperature in December in Key Largo?

In Key Largo, the average seawater temperature in December is 76.3°F (24.6°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.3°F (24.6°C) water.

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

The month with the shortest days in Key Largo, Florida, is December, with an average of 10h and 37min of daylight.

What is the average length of the day in December in Key Largo?

In Key Largo, the average day length in December is 10h and 37min.

When are sunrise and sunset in December in Key Largo?

On the first day of December in Key Largo, sunrise is at 6:49 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:42 pm EST.

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

The month with the least sunshine in Key Largo, Florida, is December, with an average of 6.4h of sunshine.

How many hours of sunshine does Key Largo have in December?

In Key Largo, Florida, the average sunshine duration in December is 6.4h.

What is the UV index reading in December in Key Largo?

In December, the average daily maximum UV index in Key Largo is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in December
Key Largo, FL

Average temperature in December - Key Largo, FL
  • Average high temperature in December: 75.2°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).

  • Average low temperature in December: 71.1°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).

[Resources]

Average pressure in December
Key Largo, FL

Average pressure in December - Key Largo, FL
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).

[Resources]

Average wind speed in December
Key Largo, FL

Average wind speed in December - Key Largo, FL
  • Average wind speed in December: 12.4mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

[Resources]

Average humidity in December
Key Largo, FL

Average humidity in December - Key Largo, FL
  • Average humidity in December: 76%

The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).

[Resources]

Average rainfall in December
Key Largo, FL

Average rainfall in December - Key Largo, FL
  • Average rainfall in December: 0.91"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").

[Resources]

Average rainfall days in December
Key Largo, FL

Average rainfall days in December - Key Largo, FL
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).

[Resources]

Average sea temperature in December
Key Largo, FL

Average sea temperature in December - Key Largo, FL
  • Average sea temperature in December: 76.3°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).

[Resources]

Average daylight in December /
Average sunshine in December
Key Largo, FL

Average daylight in December / Average sunshine in December - Key Largo, FL
  • Average daylight in December: 10h and 37min

The month with the longest days is June (Average daylight: 13h and 40min).
The month with the shortest days is December (Average daylight: 10h and 37min).

  • Average sunshine in December: 6h and 24min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

[Resources]

Average sunshine days in December
Key Largo, FL

Average sunshine days in December - Key Largo, FL
  • Average sunshine days in December: 14.9 days

The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).

[Resources]

Average UV index in December
Key Largo, FL

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

The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).

[Resources]

Average cloud cover in December
Key Largo, FL

Average cloud cover in December - Key Largo, FL
  • Average cloud cover in December: 33

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

[Resources]

Average visibility in December
Key Largo, FL

Average visibility in December - Key Largo, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location