Castries weather in January 2026

Expect daytime maximum temperatures of 28°C in Castries, St Lucia in January based on long-term weather averages. There are 8 hours of sunshine per day on average with 17 days with some rainfall and typically 113 mm of rainfall in the month.

  • 28°C maximum daytime temperature in January in Castries28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 17 days with some rainfall in January in Castries17
    17 days with some rainfall
  • 22°C minimum night-time temperature in January in Castries22
    22°C min night temperature
  • 11 hours of daylight per day in January in Castries11
    11 hours of daylight per day
  • Moderate heat & humidity in January in CastriesM
    Moderate heat & humidity
  • 113 mm monthly rainfall in January in Castries113
    113 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in January in Castries9
    9 (Very High) UV index
  • 27°C sea temperature in January in Castries27
    27°C sea temperature

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The January 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.

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

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More about St Lucia

How hot is it in Castries in January?

Daytime temperatures usually reach 28°C in Castries in January with moderate heat and humidity, falling to 22°C at night.

How sunny is it in Castries in January?

There are normally 8 hours of bright sunshine each day in Castries in January - that's 72% of daylight hours.

How warm is the sea around Castries in January?

The average sea temperature around Castries in January is 27°C.

Does it rain in Castries in January?

There are usually 17 days with some rain in Castries in January and the average monthly rainfall is 113mm.

Castries January sunrise & sunset times

Browse the sunrise and sunset times for Castries in January 2026. Select a month to view Castries sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 06:28 17:47
Friday, 16th January 2026 06:32 17:56
Saturday, 31st January 2026 06:32 18:03

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