Climate · Castries

Castries in December

Hot and wet, as the days hold steady.

Typical weather, averaged over 30 years

December in Castries is hot: highs near 86°F, lows near 76°F. Rain falls on about four days a week, less often as the month goes on, and daylight holds at about 11 hours 19 minutes.December in Castries is hot: highs near 30°C, lows near 24°C. Rain falls on about four days a week, less often as the month goes on, and daylight holds at about 11 hours 19 minutes.

High
86°F30°Caverage
Low
76°F24°Caverage
Wet days
4a week · 61% of days
Daylight
11h 19mon average

Is December a good time to visit Castries?


Yes. December is one of Castries's most comfortable months (December to March).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How December sits in the year

week by week

Temperature

Highs near 86°F in December, against 85°F to 89°F through the year.Highs near 30°C in December, against 29°C to 32°C through the year.

Chance of a wet day

61% of days in December, against 48% to 84% through the year.

Cloud cover

51% cover in December, against 45% to 69% through the year.

Daylight

11h 19m in December, against 11h 19m to 12h 56m through the year.

Week by week, lightly smoothed, with December shaded. The olive line marks the most comfortable months. Hover or tap a week for its figures.

Either side


  1. November87°31°low 77°low 25°6 wet days a weekRain on about six days a week.
  2. December86°30°low 76°low 24°4 wet days a weekRain on about four days a week.
  3. January85°29°low 75°low 24°4 wet days a weekRain on about four days a week.

Where Castries sits, in December

America/St Vincent

this place
typical high in December 40°F4°C95°F35°C
Sunrise, mid-December
6:20 AMsets 5:38 PM
Above the sea
0 mlow-lying
Latitude
14.0°Nnorthern hemisphere
Nearest of ours
our one place here

The land around Castries, shaded by its typical high in December, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Castries is our one place in St Lucia so far. Clock times are local, for the 15th.

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Castries. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (97 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (97 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.