Climate averages 1991–2020
Roseau weather
in January.
A warm, fairly dry month: one of the coolest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a warm month in Roseau: daytime highs average 25.9°C and nights cool to about 24.2°C. By daytime temperature it is one of the coolest months of the year.
Expect about 31 mm of rain on roughly 12 days, which makes January a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average January day.
The nearest other city in this atlas is Fort-de-France (85 km away). In January its highs average 26.8°C, 0.8°C warmer than Roseau, with 41 mm of rain.
From January to February, average highs stay level at 25.9°C, and monthly rainfall falls from 31 mm to 19 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Fort-de-France in JanuaryMartinique · 85 kmHigh 26.8°C · Low 24.3°C · 41 mm rain
- Basse-Terre in JanuaryGuadeloupe · 86 kmHigh 27.3°C · Low 24.4°C · 30 mm rain
- Castries in JanuarySaint Lucia · 151 kmHigh 26.9°C · Low 23.4°C · 31 mm rain
- Saint John’s in JanuaryAntigua and Barbuda · 208 kmHigh 26.2°C · Low 24.2°C · 32 mm rain
- Kingstown in JanuarySaint Vincent and the Grenadines · 239 kmHigh 26.8°C · Low 25.0°C · 36 mm rain
- Basseterre in JanuarySaint Kitts and Nevis · 264 kmHigh 25.9°C · Low 24.1°C · 30 mm rain
- Bridgetown in JanuaryBarbados · 310 kmHigh 26.6°C · Low 24.6°C · 36 mm rain
- Saint George's in JanuaryGrenada · 363 kmHigh 26.5°C · Low 24.9°C · 47 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.