Climate averages 1991–2020
Castries weather
in May.
A hot, moderately wet month: the 2nd warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Castries: daytime highs average 29.0°C and nights cool to about 24.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 47 mm of rain on roughly 13 days, which makes May a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 46 min on an average May day.
The nearest other city in this atlas is Fort-de-France (68 km away). In May its highs average 28.7°C, about as warm as Castries, with 58 mm of rain.
From May to June, average highs fall by 0.1°C to 28.8°C, and monthly rainfall rises from 47 mm to 65 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Castries climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C23.4°C | 23.4°C | 31 | 11.8 | 11.411 h |
| February | 27.3°C23.3°C | 23.3°C | 21 | 8.9 | 11.712 h |
| March | 27.7°C23.5°C | 23.5°C | 26 | 9.8 | 12.012 h |
| April | 28.4°C24.0°C | 24.0°C | 36 | 11.5 | 12.412 h |
| May, selected | 29.0°C24.8°C | 24.8°C | 47 | 12.5 | 12.813 h |
| June | 28.8°C25.0°C | 25.0°C | 65 | 15.1 | 12.913 h |
| July | 28.7°C24.8°C | 24.8°C | 83 | 20.3 | 12.913 h |
| August | 28.9°C25.0°C | 25.0°C | 99 | 20.7 | 12.613 h |
| September | 29.1°C25.2°C | 25.2°C | 104 | 19.4 | 12.212 h |
| October | 28.6°C24.9°C | 24.9°C | 119 | 20.9 | 11.812 h |
| November | 27.8°C24.5°C | 24.5°C | 102 | 18.8 | 11.511 h |
| December | 27.3°C24.0°C | 24.0°C | 42 | 13.0 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Fort-de-France in MayMartinique · 68 kmHigh 28.7°C · Low 25.6°C · 58 mm rain
- Kingstown in MaySaint Vincent and the Grenadines · 96 kmHigh 28.4°C · Low 26.2°C · 49 mm rain
- Roseau in MayDominica · 151 kmHigh 27.7°C · Low 25.5°C · 44 mm rain
- Bridgetown in MayBarbados · 179 kmHigh 28.3°C · Low 25.9°C · 41 mm rain
- Saint George's in MayGrenada · 231 kmHigh 28.1°C · Low 26.1°C · 55 mm rain
- Basse-Terre in MayGuadeloupe · 236 kmHigh 29.5°C · Low 25.8°C · 50 mm rain
- Saint John’s in MayAntigua and Barbuda · 359 kmHigh 27.9°C · Low 25.4°C · 62 mm rain
- Port of Spain in MayTrinidad and Tobago · 374 kmHigh 29.2°C · Low 25.7°C · 46 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Castries) is explained once on the Castries year overview and on the Sources, method and limits page.