Hot in May
30°C average high
avg high · 14° at night
25°C+ on 8 in 10 days
Caribbean
St Lucia weather in May
Is it warm? Yes. May in St Lucia is hot: afternoons average 29°C and nights 23°C. Most days (80%) peak between 27°C and 30°C.
Hot · average high
29°C
25°C or more on almost every day.
- Average low23°overnight
- Sea28°average, 2023–2025
- Rainy days954 mm in the month
- SkyOften cloudy65% cloud · 9% clear days
How warm it really gets
Every May afternoon from 2011–2025: 465 days. Most (80%) peaked between 27° and 30°.
May, year by year
The average May high in each year. The warmest, 2024, averaged 31°C; the coolest, 2012, 27°C.
Compared with home
Average May highs. Expect rain on about 9 days (54 mm in a typical month).
- St Lucia29°
- London17°
- Manchester16°
- Cork15°
- Dublin15°
- Glasgow15°
- Belfast14°
Warmer in May, not much further
Flying times are estimates from Dublin; St Lucia is about 8h 30m.
Very hot in May
35°C average high
avg high · 24° at night
25°C+ on almost every day · often 35°C+
Very hot in May
35°C average high
avg high · 21° at night
25°C+ on almost every day · often 35°C+
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology