What December feels like in Castries
As a tropical city, Castries is warm all year; December is not part of a clear dry or wet season. Afternoons are warm and pleasant, good for long days out. Little changes after sunset — nights stay warm, only slightly below the daytime level. The air is muggy, so it feels hotter than the thermometer suggests.
Rain in Castries in December
December is persistently wet here: some rain falls on about every other day. Most wet days bring only light rain — about 3.4 mm (0.1 in) on a typical rainy day — the kind of drizzle or short shower that rarely stops plans for long. That is lighter than the city's yearly norm of about 4.3 mm per rainy day.
How December compares to the rest of the year
In Castries's temperature order, December sits as the 3rd coolest month. Against November, the average high is 0.6°C (1.1°F) lower, with 43 mm less rain. Temperatures barely move from one month to the next here. By January, typical highs are 27.1°C (80.8°F).
Who December suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
Tips for visiting Castries in December
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Castries in December?
Expect around 27.7°C (81.9°F) in the afternoon and 23.7°C (74.7°F) at night, which most visitors would call warm.
Does it rain a lot in Castries in December?
It does: about 15 rainy days bring roughly 51 mm, so plan some indoor options.
What should I wear in Castries in December?
The numbers point to rain protection and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is December or January better for visiting Castries?
On our 12-month climate ranking, January comes out ahead (#5 of 12 vs #6).
