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

Castries by month

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

Recommended for St Lucia

Argus Car Hire: Compare low prices on car hire

  • Compare car hire with popular rental companies
  • Book with no credit card fees & free cancellation policy
  • Find low prices based on destination & travel dates
Go to Argus Car Hire deal >>

View all Argus Car Hire offers

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)

Back to top

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^