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St Lucia weather in December 2025
Expect daytime maximum temperatures of 28°C 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 91 mm of rainfall in the month.
- 28°C max day temperature
28 - 8 hours of sunshine per day
- 10 days with some rainfall
10 - 20°C min night temperature
20 - 14 hours of daylight per day
14 - Moderate heat & humidity
M - 91 mm of monthly rainfall
91 - 11+ (Extreme) UV index
11 - 25°C sea temperature
25
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St Lucia by month
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Recommended for South Africa
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 / mm) | Imperial (°F / inches)
More about South Africa
How hot is it in St Lucia in December?
Daytime temperatures usually reach 24°C in St Lucia in December, falling to 14°C at night.
How sunny is it in St Lucia in December?
There are normally 11 hours of bright sunshine each day in St Lucia in December - that's 74% of daylight hours.
How warm is the sea around St Lucia in December?
The average sea temperature around St Lucia in December is 18°C.
Does it rain in St Lucia in December?
There are usually 6 days with some rain in St Lucia in December and the average monthly rainfall is 43mm.
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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