St Lucia weather in May 2025

Expect 86°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Lucia in May. Check more long-term weather averages for St Lucia in May before you book your next holiday to St Lucia in 2025/2026.

  • 86°F maximum daytime temperature in May in St Lucia (Castries)86
    86°F max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in May in St Lucia (Castries)15
    15 days with some rainfall
  • 75°F minimum night-time temperature in May in St Lucia (Castries)75
    75°F min night temperature
  • 13 hours of daylight per day in May in St Lucia (Castries)13
    13 hours of daylight per day
  • High heat & humidity in May in St Lucia (Castries)H
    High heat & humidity
  • 4.9 inches monthly rainfall in May in St Lucia (Castries)4.9
    4.9 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in St Lucia (Castries)11
    11+ (Extreme) UV index
  • 82°F sea temperature in May in St Lucia (Castries)82
    82°F sea temperature

More about St Lucia

St Lucia by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for St Lucia

First Choice: Top deals on 2024/2025 holidays

  • Save on summer & winter sun holidays in 2024/2025
  • Book holidays to popular destinations around the world
  • Pay low deposits & spread cost with direct debit
Go to First Choice deal >>

View all First Choice offers

First ChoiceHoliday deal finder

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.

Top St Lucia destinations

Below are average maximum temperatures at popular countries, regions and places in St Lucia in May. Select a holiday destination to see more weather parameters.

All St Lucia destinations

Metric (°C)  |  Imperial (°F)

Back to top

More about St Lucia

How hot is it in St Lucia in May?

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

How sunny is it in St Lucia in May?

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

How warm is the sea around St Lucia in May?

The average sea temperature around Castries, St Lucia in May is 82°F.

Does it rain in St Lucia in May?

There are usually 15 days with some rain in Castries, St Lucia in May and the average monthly rainfall is 4.9 inches.

St Lucia May sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in May 2025. Select a month to view St Lucia sunrise and sunset times for the next 12 months. The St Lucia sunrise and sunset times shown below are for Castries.

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^