Castries weather in May 2025

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Castries in May. Check more long-term weather averages for Castries in May before you book your next holiday to St Lucia in 2025/2026.

  • 30°C maximum daytime temperature in May in Castries30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in May in Castries15
    15 days with some rainfall
  • 24°C minimum night-time temperature in May in Castries24
    24°C min night temperature
  • 13 hours of daylight per day in May in Castries13
    13 hours of daylight per day
  • High heat & humidity in May in CastriesH
    High heat & humidity
  • 124 mm monthly rainfall in May in Castries124
    124 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Castries11
    11+ (Extreme) UV index
  • 28°C sea temperature in May in Castries28
    28°C sea temperature

More about Castries

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The May 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 May?

Daytime temperatures usually reach 30°C in Castries in May with high heat and humidity, falling to 24°C at night.

How sunny is it in Castries in May?

There are normally 8 hours of bright sunshine each day in Castries in May - that's 64% of daylight hours.

How warm is the sea around Castries in May?

The average sea temperature around Castries in May is 28°C.

Does it rain in Castries in May?

There are usually 15 days with some rain in Castries in May and the average monthly rainfall is 124mm.

Castries May sunrise & sunset times

Browse the sunrise and sunset times for Castries in May 2025. Select a month to view Castries sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:42 18:20
Friday, 16th May 2025 05:37 18:24
Saturday, 31st May 2025 05:35 18:29

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