December weather forecast
Vieux Fort, Saint Lucia

Finally, December brings with it cooler temperatures, falling to the lowest of the year at 26.2°C (79.2°F). In contrast to November, the rain lessens further, making for drier days in Vieux Fort. While daylight hours minimize, balmy afternoons and cooler evenings make for comfortable weather conditions. Despite some variation in climate, December remains a favorable month for holidaymakers, with the lower temperatures providing a pleasant contrast to the tropical heat of the earlier months. It serves a fitting end to the weather calendar, bringing refreshment and ushering in positive sentiments for the New Year.

Temperature

The transition into December marks the average high-temperature at a still moderately hot 27.9°C (82.2°F), differing minimally from November's 28.7°C (83.7°F). Throughout December, Vieux Fort's nights experience a slight temperature dip to a still warm 26.2°C (79.2°F).

Heat index

The average heat index in December is computed to be a tropical 31°C (87.8°F). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. 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. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

The average relative humidity in December is 75%.

Rainfall

In Vieux Fort, in December, during 18.7 rainfall days, 37mm (1.46") of precipitation is typically accumulated. Throughout the year, there are 232.4 rainfall days, and 542mm (21.34") of precipitation is accumulated.

Sea temperature

In Vieux Fort, the average seawater temperature in December is 27.8°C (82°F).
Note: Swimming, diving, and other water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are highly enjoyable and provide prolonged comfort without unease.

Daylight

December has the shortest days of the year in Vieux Fort, with an average of 11h and 18min of daylight.
On the first day of December, sunrise is at 06:11 and sunset at 17:34. On the last day of the month, sunrise is at 06:27 and sunset at 17:47 AST.

Sunshine

With an average of 6.6h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index in Vieux Fort are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Vieux Fort, Saint Lucia, are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 during December translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.