December weather forecast
Castle Bruce, Dominica

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Weather in December

December indicates the advent of winter, with a significant drop in temperature from November. Rainfall follows suit, diminishing from 86mm (3.39") to 62mm (2.44"). Wind speeds climb upwards, reaching an average of 24.8km/h (15.4mph), the highest value since May. The daylight and sunshine hours reach their lowest, indicative of the wintertime. December is characterized by a much cooler and less humid climate, hinting at a beautiful end to the meteorological year in Castle Bruce, Dominica.

Temperature

A minor adjustment in Castle Bruce's average high-temperature is noted with the start of December, touching a still warm 27.4°C (81.3°F) from November's 28.3°C (82.9°F). During December, Castle Bruce's temperature shows a minor deviation from daytime highs, falling to a steady low-temperature average of 26.2°C (79.2°F).

Heat index

Throughout December, the heat index is calculated to be a tropical 30°C (86°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

In Castle Bruce, the average relative humidity in December is 76%.

Rainfall

In December, the rain falls for 22.9 days. Throughout December, 62mm (2.44") of precipitation is accumulated. Throughout the year, in Castle Bruce, there are 249.5 rainfall days, and 786mm (30.94") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature is 27.6°C (81.7°F).
Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is recognized as warm and pleasant by all, making water activities comfortable and delightful for long durations.

Daylight

With an average of 11h and 12min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 06:16 and sunset at 17:32. On the last day of the month, sunrise is at 06:31 and sunset at 17:45 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. The months with the lowest UV index in Castle Bruce are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, an average UV index of 7 transforms into the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
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Frequently asked questions

What is the usual temperature for Castle Bruce in December?

December temperatures in Castle Bruce, Dominica, vary between a high-temperature of 27.4°C (81.3°F) and a low-temperature of 26.2°C (79.2°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in December is calculated to be 30°C (86°F).

What is the average humidity in December in Castle Bruce?

The average relative humidity in December in Castle Bruce, Dominica, is 76%.

How much does it rain in Castle Bruce in December?

In Castle Bruce, during December, the rain falls for 22.9 days and regularly aggregates up to 62mm (2.44") of precipitation.

What is the sea water temperature in December in Castle Bruce?

In Castle Bruce, the average seawater temperature in December is 27.6°C (81.7°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Castle Bruce?

December has the shortest days of the year in Castle Bruce, with an average of 11h and 12min of daylight.

What is the average length of the day in December in Castle Bruce?

The average day length in December is 11h and 14min.

When is the sunrise / sunset in December in Castle Bruce?

On the first day of December in Castle Bruce, Dominica, sunrise is at 06:16 and sunset at 17:32. On the last day of the month, sunrise is at 06:31 and sunset at 17:45 AST.

What is the month with the least sunshine in Castle Bruce?

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

How long on average sun shines in December in Castle Bruce?

The average sunshine duration in December in Castle Bruce, Dominica, is 6.5h.

When is the highest UV index in Castle Bruce?

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

When is the lowest UV index in Castle Bruce?

The months with the lowest UV index in Castle Bruce, Dominica, are January through December, with an average maximum UV index of 7.

What is the UV index reading in December in Castle Bruce?

The average daily maximum UV index in December in Castle Bruce is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.

Average temperature in December
Castle Bruce, Dominica

Average temperature in December - Castle Bruce, Dominica
  • Average high temperature in December: 27.4°C

The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is February (26.3°C).

  • Average low temperature in December: 26.2°C

The month with the highest average low temperature is September (27.6°C).
The coldest month (with the lowest average low temperature) is February (24.9°C).

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Average pressure in December
Castle Bruce, Dominica

Average pressure in December - Castle Bruce, Dominica
  • Average pressure in December: 1014.2mbar

The month with the highest atmospheric pressure is June (1015.8mbar).
The month with the lowest atmospheric pressure is November (1012.1mbar).

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Average wind speed in December
Castle Bruce, Dominica

Average wind speed in December - Castle Bruce, Dominica
  • Average wind speed in December: 24.8km/h

The windiest month (with the highest average wind speed) is January (26.6km/h).
The calmest month (with the lowest average wind speed) is October (19.9km/h).

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Average humidity in December
Castle Bruce, Dominica

Average humidity in December - Castle Bruce, Dominica
  • Average humidity in December: 76%

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

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Average rainfall in December
Castle Bruce, Dominica

Average rainfall in December - Castle Bruce, Dominica
  • Average rainfall in December: 62mm

The wettest month (with the highest rainfall) is August (99mm).
The driest month (with the least rainfall) is February (28mm).

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Average rainfall days in December
Castle Bruce, Dominica

Average rainfall days in December - Castle Bruce, Dominica
  • Average rainfall days in December: 22.9 days

The month with the highest number of rainy days is October (23.1 days).
The month with the least rainy days is March (16.6 days).

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Average sea temperature in December
Castle Bruce, Dominica

Average sea temperature in December - Castle Bruce, Dominica
  • Average sea temperature in December: 27.6°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 (26.8°C).

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Average daylight in December /
Average sunshine in December
Castle Bruce, Dominica

Average daylight in December / Average sunshine in December - Castle Bruce, Dominica
  • Average daylight in December: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).

  • Average sunshine in December: 6h and 3min

The months with the most sunshine are April, August and September (Average sunshine: 10h and 6min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

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Average sunshine days in December
Castle Bruce, Dominica

Average sunshine days in December - Castle Bruce, Dominica
  • Average sunshine days in December: 5 days

The month with the most sunshine days is March (8.1 days).
The months with the least sunshine days are May, June and August (3.8 days).

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Average UV index in December
Castle Bruce, Dominica

Average UV index in December - Castle Bruce, Dominica
  • 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
Castle Bruce, Dominica

Average cloud cover in December - Castle Bruce, Dominica
  • Average cloud cover in December: 40

The months with the most cloud cover are June and July (Cloud cover 47).
The month with the least cloud cover is February (Cloud cover 34).

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Average visibility in December
Castle Bruce, Dominica

Average visibility in December - Castle Bruce, Dominica
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Castle Bruce, Dominica

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