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

December weather forecast and climate
Key Largo, FL

A bright seascape and cloudy evening sky in Key Largo, Florida
A bright seascape and cloudy evening sky in Key Largo, Florida
The first month of the winter, Diciembre, is also a moderately hot month in Key Largo, Florida, with average temperature ranging between min 59°F (15°C) and max 77°F (25°C).

Temperature

In Diciembre, the average high-temperature is practically the same as in Noviembre - a still moderately hot 77°F (25°C). The average low-temperature, in Key Largo, is 59°F (15°C).

Rainfall

Diciembre is the month with the least rainfall. Rain falls for 6 days and accumulates 1.42" (36mm) of precipitation.

Ocean temperature

In Key Largo, the average seawater temperature in Diciembre is 75.4°F (24.1°C).
Note: 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. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

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

Sunshine

Enero, Noviembre and Diciembre, with an average of 7h of sunshine, are months with the least sunshine in Key Largo, Florida.

UV index

Diciembre is the month with the lowest UV index in Key Largo, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In Diciembre, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in Diciembre in Key Largo?

The average high-temperature, in Diciembre, in Key Largo, Florida, is 77°F (25°C), while the average low-temperature is 59°F (15°C).

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

In Key Largo, in Diciembre, during 6 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

What is the driest month in Key Largo?

The month with the least rainfall in Key Largo, Florida, is Diciembre when the rain falls for 6 days and typically collects 1.42" (36mm) of precipitation.

How warm is the water in Diciembre in Key Largo?

In Key Largo, the average seawater temperature in Diciembre is 75.4°F (24.1°C). 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 75.4°F (24.1°C).

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

With an average of 10.6h of daylight, Diciembre has the shortest days of the year in Key Largo.

How many hours of daylight does Key Largo have in Diciembre?

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

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

Months with the least sunshine in Key Largo, Florida, are Enero, Noviembre and Diciembre, with an average of 7h of sunshine.

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

In Diciembre, the average sunshine is 7h.

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

With an average maximum UV index of 5, Diciembre is the month with the lowest UV index in Key Largo.

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

In Diciembre, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
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).