St Lucia weather in December 2024

Expect 29°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Lucia in December. Check more long-term weather averages for St Lucia in December before you book your next holiday to St Lucia in 2024/2025.

  • 29°C maximum daytime temperature in December in St Lucia (Castries)29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 18 days with some rainfall in December in St Lucia (Castries)18
    18 days with some rainfall
  • 23°C minimum night-time temperature in December in St Lucia (Castries)23
    23°C min night temperature
  • 11 hours of daylight per day in December in St Lucia (Castries)11
    11 hours of daylight per day
  • Moderate heat & humidity in December in St Lucia (Castries)M
    Moderate heat & humidity
  • 149 mm monthly rainfall in December in St Lucia (Castries)149
    149 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in December in St Lucia (Castries)8
    8 (Very High) UV index
  • 28°C sea temperature in December in St Lucia (Castries)28
    28°C sea temperature

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The December weather guide for St Lucia (Castries) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top St Lucia destinations

Below are average maximum temperatures at popular destinations in St Lucia in December. Select a destination to see more weather parameters.

All St Lucia destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about St Lucia

How hot is it in St Lucia in December?

Daytime temperatures usually reach 29°C in Castries, St Lucia in December with moderate heat and humidity, falling to 23°C at night.

How sunny is it in St Lucia in December?

There are normally 8 hours of bright sunshine each day in Castries, St Lucia in December - that's 68% of daylight hours.

How warm is the sea around St Lucia in December?

The average sea temperature around Castries, St Lucia in December is 28°C.

Does it rain in St Lucia in December?

There are usually 18 days with some rain in Castries, St Lucia in December and the average monthly rainfall is 149mm.

St Lucia December sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in December 2024. Select a month to view St Lucia sunrise and sunset times for the next 12 months. The St Lucia sunrise and sunset times shown below are for Castries.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2024 06:12 17:34
Monday, 16th December 2024 06:21 17:39
Tuesday, 31st December 2024 06:28 17:47

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