December weather forecast
Frederiksted, VI

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A sunny bright and clear sky lights up the scenic park near Frederiksted port, in the US Virgin Islands
A sunny bright and clear sky lights up the scenic park near Frederiksted port, in the US Virgin Islands

Weather in December

In December, Frederiksted ushers in cooler temperature ranges from 81.3°F (27.4°C) to 79.3°F (26.3°C). While daylight hours further shorten to 11.1 hours, the city continues to receive about 6.4 hours of sunshine on an average per day. Comparatively lower wind speeds and a lesser amount of rainfall on roughly 23 days marks December. With less heat and humidity, December seems to be a refreshing and pleasant end to the Frederiksted's annual weather cycle.

Temperature

December's beginning signals an average high-temperature of a still warm 81.3°F (27.4°C), barely different from November's 82.6°F (28.1°C). In December, Frederiksted experiences a marginal drop in temperature, with averages of 79.3°F (26.3°C) at night.

Heat index

December's mean heat index is calculated to be a hot 86°F (30°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.
Heat index details are generally centered around shaded locations and a mild breeze. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

January through March and December, with an average relative humidity of 75%, are the least humid months.

Rainfall

In Frederiksted, United States Virgin Islands, in December, during 22.7 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. In Frederiksted, during the entire year, the rain falls for 254.5 days and collects up to 29.49" (749mm) of precipitation.

Daylight

With an average of 11h and 6min of daylight, December has the shortest days of the year.
On the first day of December in Frederiksted, United States Virgin Islands, sunrise is at 6:34 am and sunset at 5:43 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:55 pm AST.

Sunshine

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

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 7 suggests these recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.

Frequently asked questions

What is the average December temperature?

The high-temperature during December is 81.3°F (27.4°C) and the low-temperature is 79.3°F (26.3°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in December is calculated to be 86°F (30°C).

What is the least humid month?

The months with the lowest humidity in Frederiksted are January through March and December, with an average relative humidity of 75%.

What is the average humidity in December?

In Frederiksted, the average relative humidity in December is 75%.

How many days does it rain in December?

In Frederiksted, in December, during 22.7 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

What is the month with the shortest days?

With an average of 11h and 6min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In Frederiksted, the average day length in December is 11h and 5min.

What time are sunrise and sunset in December?

On the first day of December in Frederiksted, United States Virgin Islands, sunrise is at 6:34 am and sunset at 5:43 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:55 pm AST.

What is the month with the least sunshine?

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

How many hours of sunshine does Frederiksted have in December?

In December, the average sunshine duration is 6.4h.

What are the months with the highest UV index?

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

When is the lowest UV index in Frederiksted?

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

How high is the UV index in December?

In Frederiksted, the average daily maximum UV index in December is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Frederiksted, VI

Average temperature in December - Frederiksted, VI
  • Average high temperature in December: 81.3°F

The warmest months (with the highest average high temperature) are September and October (84.2°F).
The month with the lowest average high temperature is March (78.8°F).

  • Average low temperature in December: 79.3°F

The month with the highest average low temperature is October (82.2°F).
The coldest month (with the lowest average low temperature) is March (76.6°F).

Average pressure in December
Frederiksted, VI

Average pressure in December - Frederiksted, VI
  • Average pressure in December: 29.97"Hg

The months with the highest atmospheric pressure are January, February and June (30.01"Hg).
The months with the lowest atmospheric pressure are October and November (29.9"Hg).

Average wind speed in December
Frederiksted, VI

Average wind speed in December - Frederiksted, VI
  • Average wind speed in December: 14.4mph

The windiest month (with the highest average wind speed) is July (14.7mph).
The calmest month (with the lowest average wind speed) is October (11mph).

Average humidity in December
Frederiksted, VI

Average humidity in December - Frederiksted, 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 and December (75%).

Average rainfall in December
Frederiksted, VI

Average rainfall in December - Frederiksted, VI
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in December
Frederiksted, VI

Average rainfall days in December - Frederiksted, VI
  • Average rainfall days in December: 22.7 days

The month with the highest number of rainy days is August (24.7 days).
The month with the least rainy days is February (16.7 days).

Average daylight in December /
Average sunshine in December
Frederiksted, VI

Average daylight in December / Average sunshine in December - Frederiksted, VI
  • Average daylight in December: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in December
Frederiksted, VI

Average sunshine days in December - Frederiksted, VI
  • Average sunshine days in December: 4.3 days

The month with the most sunshine days is March (7.6 days).
The month with the least sunshine days is August (1.8 days).

Average UV index in December
Frederiksted, VI

Average UV index in December - Frederiksted, 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).

Average cloud cover in December
Frederiksted, VI

Average cloud cover in December - Frederiksted, 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).

Average visibility in December
Frederiksted, VI

Average visibility in December - Frederiksted, 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).

Frederiksted, United States Virgin Islands, USA

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