December weather forecast
Castries City, Saint Lucia

December brings the year to a close in Castries City, with a final sharp decrease in rainfall to 176mm (6.93"). This transition marks a shift from the rather wet weather to an inviting sun-filled atmosphere, perfect for celebrating the holiday season. Despite a reduction in rainfall, December retains the city's warmth and humidity in check. Foreshadowing the dry season, December provides a sneak peek into the charming weather the following year would bring. The steady climate, coupled with an alluring festive atmosphere, makes it an ideal month for touring and excitement in the city.

Temperature

January through March and December bring Castries City's lowest average temperatures, reaching a high of 28°C (82.4°F).

Rainfall

In Castries City, during December, the rain falls for 18 days and regularly aggregates up to 176mm (6.93") of precipitation. Throughout the year, there are 208 rainfall days, and 2377mm (93.58") of precipitation is accumulated.

Sea temperature

In Castries City, in December, the average water temperature is 27°C (80.6°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

December has the shortest days of the year, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:12 and sunset at 17:33. On the last day of December, in Castries City, sunrise is at 06:27 and sunset at 17:46 AST.

Sunshine

The months with the most sunshine in Castries City are January through September, November and December, with an average of 8h of sunshine.

UV index

The month with the lowest UV index in Castries City is December, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high threat to health from unsafe exposure to UV radiation for the average person.
Note: A typical high UV index of 8 in December suggests the following recommendations:
Without constant care, eyes and skin might suffer damage in a short time. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heed this! UV intensity is much stronger when reflected off sand and water.