Castries weather in May 2026

Expect daytime maximum temperatures of 86°F in Castries, St Lucia in May and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 15 days with some rainfall and typically 4.9 inches of rainfall in the month.

  • 86°F maximum daytime temperature in May in Castries86
    86°F max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in May in Castries15
    15 days with some rainfall
  • 75°F minimum night-time temperature in May in Castries75
    75°F 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
  • 4.9 inches monthly rainfall in May in Castries4.9
    4.9 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Castries11
    11+ (Extreme) UV index
  • 82°F sea temperature in May in Castries82
    82°F sea temperature

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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)  |  Imperial (°F)

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More about St Lucia

How hot is it in Castries in May?

Daytime temperatures usually reach 86°F in Castries in May with high heat and humidity, falling to 75°F 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 82°F.

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 4.9 inches.

Castries May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:42 18:20
Saturday, 16th May 2026 05:37 18:24
Sunday, 31st May 2026 05:35 18:29

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