Climate averages 1991–2020
Basse-Terre weather
in September.
A hot, wet month: the joint 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Basse-Terre: daytime highs average 30.0°C and nights cool to about 26.7°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 107 mm of rain on roughly 18 days, which makes September a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 14 min on an average September day.
The nearest other city in this atlas is Roseau (86 km away). In September its highs average 28.3°C, 1.6°C cooler than Basse-Terre, with 113 mm of rain.
From September to October, average highs fall by 0.5°C to 29.5°C, and monthly rainfall rises from 107 mm to 108 mm.
The annual picture
September 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
Basse-Terre climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.3°C24.4°C | 24.4°C | 30 | 11.9 | 11.311 h |
| February | 27.4°C24.1°C | 24.1°C | 22 | 9.1 | 11.612 h |
| March | 28.0°C24.3°C | 24.3°C | 19 | 7.2 | 12.012 h |
| April | 28.8°C25.0°C | 25.0°C | 30 | 9.6 | 12.512 h |
| May | 29.5°C25.8°C | 25.8°C | 50 | 11.5 | 12.913 h |
| June | 30.0°C26.4°C | 26.4°C | 45 | 12.4 | 13.113 h |
| July | 30.0°C26.4°C | 26.4°C | 62 | 15.9 | 13.013 h |
| August | 30.1°C26.6°C | 26.6°C | 79 | 17.8 | 12.713 h |
| September, selected | 30.0°C26.7°C | 26.7°C | 107 | 18.1 | 12.212 h |
| October | 29.5°C26.5°C | 26.5°C | 108 | 19.5 | 11.812 h |
| November | 28.6°C25.9°C | 25.9°C | 86 | 16.3 | 11.411 h |
| December | 27.8°C25.0°C | 25.0°C | 40 | 13.5 | 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
September in nearby cities
- Roseau in SeptemberDominica · 86 kmHigh 28.3°C · Low 26.2°C · 113 mm rain
- Saint John’s in SeptemberAntigua and Barbuda · 126 kmHigh 28.7°C · Low 26.2°C · 127 mm rain
- Fort-de-France in SeptemberMartinique · 170 kmHigh 29.0°C · Low 26.2°C · 138 mm rain
- Basseterre in SeptemberSaint Kitts and Nevis · 179 kmHigh 28.5°C · Low 26.3°C · 118 mm rain
- Castries in SeptemberSaint Lucia · 236 kmHigh 29.1°C · Low 25.2°C · 104 mm rain
- Kingstown in SeptemberSaint Vincent and the Grenadines · 321 kmHigh 28.7°C · Low 26.6°C · 141 mm rain
- Bridgetown in SeptemberBarbados · 394 kmHigh 28.5°C · Low 26.2°C · 133 mm rain
- Saint George's in SeptemberGrenada · 439 kmHigh 28.4°C · Low 26.4°C · 143 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 Basse-Terre) is explained once on the Basse-Terre year overview and on the Sources, method and limits page.