Climate averages 1991–2020
Roseau weather
in May.
A warm, moderately wet month: the 6th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Roseau: daytime highs average 27.7°C and nights cool to about 25.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 44 mm of rain on roughly 10 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 50 min on an average May day.
The nearest other city in this atlas is Fort-de-France (85 km away). In May its highs average 28.7°C, 1.0°C warmer than Roseau, with 58 mm of rain.
From May to June, average highs rise by 0.3°C to 27.9°C, and monthly rainfall rises from 44 mm to 47 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
Roseau climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.9°C24.2°C | 24.2°C | 31 | 12.0 | 11.311 h |
| February | 25.9°C24.0°C | 24.0°C | 19 | 7.0 | 11.612 h |
| March | 26.3°C24.2°C | 24.2°C | 19 | 6.9 | 12.012 h |
| April | 27.0°C24.7°C | 24.7°C | 29 | 8.3 | 12.512 h |
| May, selected | 27.7°C25.5°C | 25.5°C | 44 | 10.2 | 12.813 h |
| June | 27.9°C25.9°C | 25.9°C | 47 | 10.5 | 13.013 h |
| July | 28.0°C25.8°C | 25.8°C | 76 | 16.4 | 12.913 h |
| August | 28.2°C26.0°C | 26.0°C | 99 | 18.4 | 12.613 h |
| September | 28.3°C26.2°C | 26.2°C | 113 | 17.1 | 12.212 h |
| October | 28.0°C25.9°C | 25.9°C | 118 | 19.1 | 11.812 h |
| November | 27.3°C25.4°C | 25.4°C | 101 | 17.1 | 11.411 h |
| December | 26.5°C24.8°C | 24.8°C | 48 | 14.3 | 11.211 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 · 85 kmHigh 28.7°C · Low 25.6°C · 58 mm rain
- Basse-Terre in MayGuadeloupe · 86 kmHigh 29.5°C · Low 25.8°C · 50 mm rain
- Castries in MaySaint Lucia · 151 kmHigh 29.0°C · Low 24.8°C · 47 mm rain
- Saint John’s in MayAntigua and Barbuda · 208 kmHigh 27.9°C · Low 25.4°C · 62 mm rain
- Kingstown in MaySaint Vincent and the Grenadines · 239 kmHigh 28.4°C · Low 26.2°C · 49 mm rain
- Basseterre in MaySaint Kitts and Nevis · 264 kmHigh 27.5°C · Low 25.4°C · 61 mm rain
- Bridgetown in MayBarbados · 310 kmHigh 28.3°C · Low 25.9°C · 41 mm rain
- Saint George's in MayGrenada · 363 kmHigh 28.1°C · Low 26.1°C · 55 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 Roseau) is explained once on the Roseau year overview and on the Sources, method and limits page.