St. Lucia

Avg weather in December
11 Hrs per day
138 mm per month
73 % avg
14 Mph avg

St. Lucia Weather in December

destination intro image

What’s the weather like in St. Lucia in December?

St. Lucia weather in December is comfortably warm and is one of the best times to visit if you want to avoid the rain and increasingly high temperatures of summer.

Geographical influences

St. Lucia is an Eastern Caribbean island and experiences a lovely tropical climate without much difference in temperature from season to season. It’s home to a series of volcanic beaches and lush rainforests, making it the perfect place to visit if you want to experience the beauty of a tropical paradise for yourself. It tends to be quite humid in December, but the sea brings regular winds to the resort that help to control high temperatures and drop humidity levels slightly.


Even though it’s winter, December sees an average daily temperature of 30°C and lows of 25°C. Since St. Lucia has a tropical Caribbean climate, the high temperatures usually come with an increased chance of rain. However, December sees far less rain than previous months, with an average rainfall of around 138mm spread over the course of 19 days. There are 11 hours of sunshine each day, with an average humidity of 73%. 14mph winds provide a pleasant break from the heat, but you can also cool down in the sea, which has an average water temperature of 28°C.

View weather for