St. Lucia (Castries) in May
In May, St. Lucia (Castries) averages 29°C (85°F) during the day and 25°C (77°F) at night, with frequent rain — about 26 days of the month see precipitation (53 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
May offers comfortable temperatures in St. Lucia (Castries), with some rain to plan around.
How May compares to the rest of the year in St. Lucia (Castries)
May is in the middle of the year for warmth in St. Lucia (Castries) (4th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature runs 1°C above the annual average (29°C). May runs 1°C warmer than April (29°C) and stays flat into June.
May sunrise & sunset in St. Lucia (Castries)
Times shown for St. Lucia (Castries) local time (America/St_Lucia), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in St. Lucia (Castries) — May
Golden-hour and blue-hour windows for the 15th of May, in St. Lucia (Castries)'s local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — St. Lucia (Castries) in May
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on May's tier (Shoulder) and St. Lucia (Castries)'s popularity.
Crowds & pricing — May in St. Lucia (Castries)
St. Lucia (Castries) is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — May in St. Lucia (Castries)
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in St. Lucia (Castries) — May
Across the year St. Lucia (Castries)'s sea swings from 27.1°C (February) to 30.3°C (September) — May sits at 28.5°C.
St. Lucia (Castries) in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 27°C / 81°F | 24°C / 75°F | 56 mm | 26 | — |
| February | 27°C / 81°F | 24°C / 74°F | 47 mm | 24 | — |
| March | 28°C / 82°F | 24°C / 75°F | 50 mm | 26 | — |
| April | 29°C / 83°F | 24°C / 76°F | 40 mm | 23 | — |
| May | 29°C / 85°F | 25°C / 77°F | 53 mm | 26 | — |
| June | 29°C / 85°F | 25°C / 78°F | 96 mm | 27 | — |
| July | 29°C / 84°F | 25°C / 78°F | 112 mm | 29 | — |
| August | 29°C / 85°F | 26°C / 78°F | 114 mm | 29 | — |
| September | 30°C / 86°F | 26°C / 78°F | 115 mm | 27 | — |
| October | 29°C / 85°F | 26°C / 78°F | 108 mm | 28 | — |
| November | 28°C / 83°F | 25°C / 77°F | 114 mm | 28 | — |
| December | 28°C / 82°F | 25°C / 76°F | 60 mm | 23 | — |
Other cities with similar May weather
🌍 See the full ranked list of climate twins for St. Lucia (Castries) in May →
Frequently asked questions
How hot is St. Lucia (Castries) in May?
In May, St. Lucia (Castries) averages a high of 29°C (85°F) and a low of 25°C (77°F) — generally warm.
Does it rain a lot in St. Lucia (Castries) in May?
May is quite rainy in St. Lucia (Castries), with about 26 rainy days on average.
Is May a good time to visit St. Lucia (Castries)?
May is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for St. Lucia (Castries) in May?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full May packing list for St. Lucia (Castries) for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.