St Lucia weather in December 2025

Expect daytime maximum temperatures of 82°F in St Lucia, South Africa in December based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 3.6 inches of rainfall in the month.

  • 82°F maximum daytime temperature in December in St Lucia82
    82°F max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in December in St Lucia10
    10 days with some rainfall
  • 68°F minimum night-time temperature in December in St Lucia68
    68°F min night temperature
  • 14 hours of daylight per day in December in St Lucia14
    14 hours of daylight per day
  • Moderate heat & humidity in December in St LuciaM
    Moderate heat & humidity
  • 3.6 inches monthly rainfall in December in St Lucia3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in St Lucia11
    11+ (Extreme) UV index
  • 77°F sea temperature in December in St Lucia77
    77°F sea temperature

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The December weather guide for South Africa (St Lucia) 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.

Metric (°C)  |  Imperial (°F)

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More about South Africa

How hot is it in St Lucia in December?

Daytime temperatures usually reach 82°F in St Lucia in December with moderate heat and humidity, falling to 68°F at night.

How sunny is it in St Lucia in December?

There are normally 8 hours of bright sunshine each day in St Lucia in December - that's 55% of daylight hours.

How warm is the sea around St Lucia in December?

The average sea temperature around St Lucia in December is 77°F.

Does it rain in St Lucia in December?

There are usually 10 days with some rain in St Lucia in December and the average monthly rainfall is 3.6 inches.

St Lucia December sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in December 2025. Select a month to view St Lucia sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 04:45 18:34
Tuesday, 16th December 2025 04:48 18:44
Wednesday, 31st December 2025 04:56 18:51

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