Castries Weather in December
Thinking of visiting Castries in December? Expect high temperatures reaching 30°C (86°F) during the day, dropping to 25°C (77°F) at night, with some rainfall likely.
Rainfall in Castries in December
The climate data from previous years indicates about 18 days of rain, averaging 56 mm (2.2 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Castries in December
December in Castries brings high temperatures, with highs of 30°C (86°F) and nights around 25°C (77°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Castries in December
There are approximately 247 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January and February typically offer the best weather for Castries.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Saint Lucia, check out our Castries's climate page.
Castries Temperature in December
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
60%
Precipitation
56 mm (2.2 in)
Rainy days
18 days
Humidity
82% *
Sunshine
247 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Castries typically stay consistent throughout December, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in December
Historical weather for Castries in December
Browse day-by-day weather records for Castries spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Castries historical weather extremes in December
Based on weather observations in Castries between 1992 and 2025, these are the recorded extremes during December.
- On December 8, 2021, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- The coldest December day was on December 4, 2018, with a maximum of 26°C (79°F).
- The coldest night in December in Castries was on December 17, 1992, with a minimum of 16°C (61°F).
Best Places in Saint Lucia in December
Find out more about the weather in Saint Lucia and which places have the best travel conditions in this month. See all of Saint Lucia in December →
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What to Wear in Castries in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Castries in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Saint Lucia, check out our Castries's climate page.
Temperature Rainfall Sunshine Humidity
See the full Castries climate overview or explore weather in Saint Lucia.
