Charlotte Amalie
United States Virgin Islands, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Charlotte Amalie, VI

An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands
An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands
December, the first month of the winter, in Charlotte Amalie, is also a moderately hot month, with average temperature ranging between min 78.4°F (25.8°C) and max 80.6°F (27°C).

Temperature

In December, the average high-temperature is relatively the same as in November - a still warm 80.6°F (27°C). In December, in Charlotte Amalie, the average low-temperature is 78.4°F (25.8°C).

Heat index

The average heat index is appraised at 84.7°F (29.3°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

Months with the lowest humidity are January through March, October through December, with an average relative humidity of 75%.

Rainfall

In Charlotte Amalie, during December, the rain falls for 22.6 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 253.1 rainfall days, and 33.27" (845mm) of precipitation is accumulated.

Ocean temperature

In December, the average ocean temperature is 81.3°F (27.4°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

With an average of 11h of daylight, December has the shortest days of the year.

Sunshine

November and December, with an average of 6.5h of sunshine, are months with the least sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. Months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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.

What is the temperature in December in Charlotte Amalie?

The average high-temperature, in December, in Charlotte Amalie, United States Virgin Islands, is 80.6°F (27°C), while the average low-temperature is 78.4°F (25.8°C). In December, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines relative humidity and air temperature, is estimated at 84.7°F (29.3°C).

What is the least humid month in Charlotte Amalie?

Months with the lowest humidity in Charlotte Amalie are January through March, October through December, with an average relative humidity of 75%.

What is the average humidity in December in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, the average relative humidity in December is 75%.

How many days does it rain in December in Charlotte Amalie?

In Charlotte Amalie, during December, the rain falls for 22.6 days and regularly aggregates up to 2.05" (52mm) of precipitation.

How warm is the water in December in Charlotte Amalie?

In Charlotte Amalie, the average seawater temperature in December is 81.3°F (27.4°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Charlotte Amalie?

With an average of 11h of daylight, December has the shortest days of the year in Charlotte Amalie, United States Virgin Islands.

How many hours of daylight does Charlotte Amalie have in December?

The average length of the day in December is 11h.

What is the month with the least sunshine in Charlotte Amalie?

Months with the least sunshine in Charlotte Amalie are November and December, with an average of 6.5h of sunshine.

How long on average sun shines in December in Charlotte Amalie?

In December, the average sunshine in Charlotte Amalie is 6.5h.

When is the highest UV index in Charlotte Amalie?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Charlotte Amalie.

What is the month with the lowest UV index in Charlotte Amalie?

January through December, with an average maximum UV index of 7, are months with the lowest UV index.

What is the UV index reading in December in Charlotte Amalie?

In Charlotte Amalie, the average daily maximum UV index in December is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Charlotte Amalie, VI
  • Average high temperature in December: 27°C

The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is March (25.8°C).

  • Average low temperature in December: 25.8°C

The month with the highest average low temperature is October (27.5°C).
The coldest month (with the lowest average low temperature) is March (24.3°C).

Average humidity in December - Charlotte Amalie, VI
  • Average humidity in December: 75%

Months with the highest relative humidity are May, June, July and August (78%).
Months with the lowest relative humidity are January, February, March, October, November and December (75%).

Average rainfall in December - Charlotte Amalie, VI
  • Average rainfall in December: 52mm

The wettest month (with the highest rainfall) is September (113mm).
The driest month (with the lowest rainfall) is February (31mm).

Average rainfall days in December - Charlotte Amalie, VI
  • Average rainfall days in December: 22.6 days

The month with the highest number of rainy days is November (25.5 days).
Months with the lowest number of rainy days are February, March and June (18.2 days).

Average sea temperature in December - Charlotte Amalie, VI
  • Average sea temperature in December: 27.4°C

The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is February (25.9°C).

Average daylight in December / Average sunshine in December - Charlotte Amalie, VI
  • Average daylight in December: 11h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in December: 6.5h

The month with most sunshine is June (Average sunshine: 10.5h).
Months with least sunshine are November and December (Average sunshine: 6.5).

Average UV index in December - Charlotte Amalie, VI
  • Average UV index in December: 7

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).