Climate averages 1991–2020
Les Cayes weather
in September.
A hot, wet month: the joint 3rd warmest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Les Cayes: daytime highs average 31.4°C and nights cool to about 25.4°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 100 mm of rain on roughly 16 days, which makes September a wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average September day.
The nearest other city in this atlas is Jérémie (64 km away). In September its highs average 30.1°C, 1.3°C cooler than Les Cayes, with 59 mm of rain.
Among the 18 cities listed in Haiti, Les Cayes ranks joint 5th of 18 for the warmest September highs and 6th of 18 for the driest September (rainfall, lowest first). The mean September high of those 18 cities is 31.0°C; Les Cayes is 0.4°C warmer than that mean.
From September to October, average highs fall by 1.2°C to 30.2°C, and monthly rainfall rises from 100 mm to 145 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
Les Cayes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.8°C22.4°C | 22.4°C | 23 | 5.1 | 11.211 h |
| February | 29.1°C22.4°C | 22.4°C | 22 | 5.8 | 11.512 h |
| March | 29.5°C22.7°C | 22.7°C | 41 | 10.0 | 12.012 h |
| April | 30.0°C23.5°C | 23.5°C | 60 | 13.1 | 12.513 h |
| May | 30.3°C24.4°C | 24.4°C | 100 | 15.6 | 13.013 h |
| June | 31.4°C25.3°C | 25.3°C | 62 | 9.9 | 13.213 h |
| July | 32.3°C25.6°C | 25.6°C | 54 | 10.0 | 13.113 h |
| August | 32.2°C25.8°C | 25.8°C | 78 | 12.5 | 12.713 h |
| September, selected | 31.4°C25.4°C | 25.4°C | 100 | 16.3 | 12.312 h |
| October | 30.2°C24.8°C | 24.8°C | 145 | 18.3 | 11.712 h |
| November | 29.4°C24.0°C | 24.0°C | 84 | 12.2 | 11.311 h |
| December | 29.0°C23.0°C | 23.0°C | 27 | 6.0 | 11.111 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
- Jérémie in SeptemberHaiti · 64 kmHigh 30.1°C · Low 25.8°C · 59 mm rain
- Miragoâne in SeptemberHaiti · 75 kmHigh 31.4°C · Low 26.2°C · 129 mm rain
- Tigwav in SeptemberHaiti · 97 kmHigh 31.4°C · Low 26.3°C · 121 mm rain
- Léogâne in SeptemberHaiti · 123 kmHigh 30.8°C · Low 24.8°C · 121 mm rain
- Jacmel in SeptemberHaiti · 128 kmHigh 29.4°C · Low 25.1°C · 137 mm rain
- Arcahaie in SeptemberHaiti · 145 kmHigh 31.1°C · Low 24.7°C · 43 mm rain
- Carrefour in SeptemberHaiti · 147 kmHigh 30.9°C · Low 24.7°C · 180 mm rain
- Saint-Marc in SeptemberHaiti · 151 kmHigh 31.2°C · Low 25.5°C · 97 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 Les Cayes) is explained once on the Les Cayes year overview and on the Sources, method and limits page.