December weather forecast
Charlotte Amalie, VI

The Charlotte Amalie Harbour within the United States Virgin Islands
The Charlotte Amalie Harbour within the United States Virgin Islands

Weather in December

December, the first month of the winter in Charlotte Amalie, is still a warm month, with an average temperature fluctuating between 80.6°F (27°C) and 78.4°F (25.8°C).

Temperature

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

Heat index

In December, 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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, metabolic differences), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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

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

Rainfall

In Charlotte Amalie, during December, the rain falls for 22.6 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Charlotte Amalie, during the entire year, the rain falls for 253.1 days and collects up to 33.27" (845mm) of precipitation.

Ocean temperature

In Charlotte Amalie, the average seawater temperature in December 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 and 3min of daylight, December has the shortest days of the year in Charlotte Amalie.
On the first day of the month, sunrise is at 6:35 am and sunset at 5:42 pm. On the last day of December, sunrise is at 6:51 am and sunset at 5:54 pm AST.

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. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in December transform into the following instructions:
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. 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 Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, in December, the average high-temperature is 80.6°F (27°C), and the average low-temperature is 78.4°F (25.8°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in December is appraised at 84.7°F (29.3°C).

What are the least humid months in Charlotte Amalie?

The months with the lowest humidity in Charlotte Amalie, United States Virgin Islands, 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 much does it rain in Charlotte Amalie in December?

In December, in Charlotte Amalie, United States Virgin Islands, the rain falls for 22.6 days. Throughout December, 2.05" (52mm) of precipitation is accumulated.

How warm is the water in December in Charlotte Amalie?

In December, the average ocean temperature in Charlotte Amalie is 81.3°F (27.4°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

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

With an average of 11h and 3min of daylight, December has the shortest days of the year in Charlotte Amalie, United States Virgin Islands.

What is the average length of the day in December in Charlotte Amalie?

In Charlotte Amalie, the average day length in December is 11h and 3min.

What time are sunrise and sunset in December in Charlotte Amalie?

In December, on the first day of the month, sunrise is at 6:35 am and sunset at 5:42 pm. On the last day of the month, in Charlotte Amalie, sunrise is at 6:51 am and sunset at 5:54 pm AST.

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

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

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

The average sunshine duration in December 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, United States Virgin Islands.

When is the lowest UV index in Charlotte Amalie?

The months with the lowest UV index in Charlotte Amalie, United States Virgin Islands, are January through December, with an average maximum UV index of 7.

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 health risk from unprotected exposure to UV radiation.

Average temperature in December
Charlotte Amalie, VI

Average temperature in December - Charlotte Amalie, VI
  • Average high temperature in December: 80.6°F

The warmest month (with the highest average high temperature) is September (84°F).
The month with the lowest average high temperature is March (78.4°F).

  • Average low temperature in December: 78.4°F

The month with the highest average low temperature is October (81.5°F).
The coldest month (with the lowest average low temperature) is March (75.7°F).

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Average pressure in December
Charlotte Amalie, VI

Average pressure in December - Charlotte Amalie, VI
  • Average pressure in December: 29.98"Hg

The months with the highest atmospheric pressure are January and February (30.02"Hg).
The months with the lowest atmospheric pressure are October and November (29.91"Hg).

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Average wind speed in December
Charlotte Amalie, VI

Average wind speed in December - Charlotte Amalie, VI
  • Average wind speed in December: 14.7mph

The windiest month (with the highest average wind speed) is July (15mph).
The calmest month (with the lowest average wind speed) is October (11.1mph).

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Average humidity in December
Charlotte Amalie, VI

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

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

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Average rainfall in December
Charlotte Amalie, VI

Average rainfall in December - Charlotte Amalie, VI
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in December
Charlotte Amalie, VI

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).
The months with the least rainy days are February, March and June (18.2 days).

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Average sea temperature in December
Charlotte Amalie, VI

Average sea temperature in December - Charlotte Amalie, VI
  • Average sea temperature in December: 81.3°F

The best month for swimming (with the highest average sea temperature) is September (85°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).

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Average daylight in December /
Average sunshine in December
Charlotte Amalie, VI

Average daylight in December / Average sunshine in December - Charlotte Amalie, VI
  • Average daylight in December: 11h and 3min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 3min).

  • Average sunshine in December: 6h and 30min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

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Average sunshine days in December
Charlotte Amalie, VI

Average sunshine days in December - Charlotte Amalie, VI
  • Average sunshine days in December: 3.6 days

The months with the most sunshine days are March and April (7.3 days).
The month with the least sunshine days is November (2.4 days).

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Average UV index in December
Charlotte Amalie, VI

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

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

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Average cloud cover in December
Charlotte Amalie, VI

Average cloud cover in December - Charlotte Amalie, VI
  • Average cloud cover in December: 39

The months with the most cloud cover are May and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 33).

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Average visibility in December
Charlotte Amalie, VI

Average visibility in December - Charlotte Amalie, VI
  • 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).

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