Castries weather in May
May in Castries: hot, dry, with clean air — an excellent time to visit.
#5 of 12 months in Castries · #146 of 604 destinations to visit in May · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Castries climate normals — May
| Daytime high | 30°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 30 mm / 1.2 in | ☀️ dry |
| Rainy days | 8 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 21°C / 70°F | |
| Sunshine | 11.7 h/day | |
| Daylight | 12.8 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Castries?
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Castries in May — FAQ
- Is May a good time to visit Castries?
- May in Castries: hot, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Castries on SeasonMap's comfort score (87/100).
- What is the weather like in Castries in May?
- In May, Castries averages a daily high of 29.6°C and a low of 25.1°C, with about 29.5 mm of rain over roughly 7.8 rainy days.
- What is the air quality in Castries in May?
- Castries has a mean US Air Quality Index of about 48 in May.