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

Weather in December

December, the first month of the winter, in Key Largo, is still a warm month, with average temperature fluctuating between 75.2°F (24°C) and 71.1°F (21.7°C).

Temperature

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

Humidity

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

Rainfall

In Key Largo, it is raining for 12.5 days, with typically 0.91" (23mm) of accumulated precipitation. 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, the average seawater temperature is 76.3°F (24.6°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.3°F (24.6°C).

Daylight

With an average of 10.6h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

In Key Largo, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 6 in December interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in December in Key Largo?

In December, the average high-temperature is 75.2°F (24°C), and the average low-temperature is 71.1°F (21.7°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?

In Key Largo, the average relative humidity in December is 76%.

How much does it rain in Key Largo in December?

In Key Largo, in December, it is raining for 12.5 days, with typically 0.91" (23mm) of accumulated precipitation.

What is the ocean temperature in December in Key Largo?

In Key Largo, in December, the average water temperature is 76.3°F (24.6°C). 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.

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

With an average of 10.6h of daylight, December has the shortest days of the year.

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

In December, the average length of the day is 10.6h.

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

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

How long on average sun shines in December in Key Largo?

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

How high is the UV index 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 threat from unprotected exposure to the UV radiation.

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).

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Average pressure in December
Key Largo, FL

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

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

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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).

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Average humidity in December
Key Largo, FL

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

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

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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").

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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).

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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).

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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: 10.6h

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

  • Average sunshine in December: 6.4h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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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).

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Average UV index in December
Key Largo, FL

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

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).

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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).

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Average visibility in December
Key Largo, FL

Average visibility in December - Key Largo, FL
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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