December weather forecast
Marigot Bay, Saint Lucia

December brings a further drop in rainfall, down to 35mm (1.38"), a significant reduction compared to the wet-season peak in August. Meanwhile, the shifting weather patterns push the average high temperature down to 28.2°C (82.8°F), lower than November's 29.2°C (84.6°F). The month is vibrant with holiday celebrations and the cooler weather contributes to the festive mood. Additionally, the consistent sea temperature ensures that water activities remain enjoyable. In short, December in Marigot Bay offers a pleasant climatic end to the year, with mild temperatures and a reduced likelihood of rainfall.

Temperature

The transition into December marks the average high-temperature at a still warm 28.2°C (82.8°F), differing minimally from November's 29.2°C (84.6°F). Marigot Bay registers a gentle descent to an average nighttime low of 25.7°C (78.3°F) in December from its daytime highs.

Heat index

December's heat index is calculated to be a hot 32°C (89.6°F). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Marigot Bay, the average relative humidity in December is 74%.

Rainfall

In December, the rain falls for 19.1 days. Throughout December, 35mm (1.38") of precipitation is accumulated. Throughout the year, there are 255.2 rainfall days, and 560mm (22.05") of precipitation is accumulated.

Sea temperature

In Marigot Bay, the average seawater temperature in December is 28°C (82.4°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

December has the shortest days of the year in Marigot Bay, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:12 and sunset at 17:34. On the last day of December, sunrise is at 06:27 and sunset at 17:46 AST.

Sunshine

With an average of 6.4h of sunshine, December has the least sunshine of the year in Marigot Bay, Saint Lucia.

UV index

The months with the highest UV index are January through May, July through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 7 in December transforms into this advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.