St Lucia weather in December 2019

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

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The December weather guide for 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.

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

Guide to St Lucia weather in December

The average maximum daytime temperature in St Lucia in December is a warm 29°C (84°F) with moderate heat & humidity. The average night-time temperature is usually a warm 23°C (73°F). There are usually 8 hours of bright sunshine each day, which represents 68% of the 11 hours of daylight.

Expect 149mm (5.9 inches) of rainfall across the whole of December with 18 days with some rain falling. Maximum UV levels will be very high (8 UV index) at midday when the skies are clear.

The average sea temperature in and around St Lucia in December is 28°C (82°F).

The weather in St Lucia in December is represented by Castries.

St Lucia sunrise & sunset times for December 2019

Browse the sunrise & sunset times for St Lucia in December 2019. Select a month to view St Lucia sunrise & sunset times for the next twelve months. The St Lucia sunrise & sunset times shown below are for Castries.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2019 06:12 17:34
Monday, 16th December 2019 06:20 17:39
Tuesday, 31st December 2019 06:27 17:46
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  • Travel before 30th June 2021 (inclusive)

Expires at 23:59 on Saturday 31st Aug 2019 · View all Sandals offers

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