Les Cayes weather in September
In September, Les Cayes sees average daytime highs of 29°C and overnight lows near 25°C, with 100 mm of rain across 16.4 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels oppressive.
Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Les Cayes's 12th-clearest and 9th-windiest month. For the whole year in context, see Les Cayes's year-round climate.
- Daytime high
- 29°
- 3rd warmest
- Overnight low
- 25°
- 10th coldest
- Rainfall
- 100 mm
- 16.4 wet days
- Daylight
- 12 h 06 min
- 5:46 AM – 5:52 PM
- Cloud cover
- 60%
- 12th clearest
- Wind
- 9 km/h
- 9th windiest
- Solar energy
- 6 kWh/m²
- Travel score
- 4.8
- out of 10
Temperature in September
Day-to-day highs hold fairly steady near 29°C through the month.
A typical September day in Les Cayes reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 25 |
| 2 | 29 | 25 |
| 3 | 29 | 25 |
| 4 | 29 | 25 |
| 5 | 29 | 25 |
| 6 | 29 | 25 |
| 7 | 29 | 25 |
| 8 | 29 | 25 |
| 9 | 29 | 25 |
| 10 | 29 | 25 |
| 11 | 29 | 25 |
| 12 | 29 | 25 |
| 13 | 29 | 25 |
| 14 | 29 | 25 |
| 15 | 29 | 25 |
| 16 | 29 | 25 |
| 17 | 29 | 25 |
| 18 | 29 | 25 |
| 19 | 29 | 25 |
| 20 | 28 | 25 |
| 21 | 28 | 25 |
| 22 | 28 | 25 |
| 23 | 28 | 25 |
| 24 | 28 | 25 |
| 25 | 28 | 25 |
| 26 | 28 | 25 |
| 27 | 28 | 25 |
| 28 | 28 | 25 |
| 29 | 28 | 25 |
| 30 | 28 | 25 |
How September really feels in Les Cayes
Once humidity and wind are folded in, September averages 12 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Les Cayes weather by month
How September compares with the rest of the year at a glance. September is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 22° | 23 | 5.1 | 11 | 8.0 |
| Feb | 26° / 22° | 22 | 5.7 | 11.4 | 7.8 |
| Mar | 26° / 22° | 41 | 10 | 11.9 | 7.1 |
| Apr | 27° / 23° | 60 | 13.1 | 12.4 | 6.4 |
| May | 27° / 24° | 100 | 15.6 | 12.8 | 5.7 |
| Jun | 28° / 25° | 62 | 10 | 13.1 | 5.9 |
| Jul | 29° / 25° | 54 | 10 | 13 | 5.7 |
| Aug | 29° / 25° | 78 | 12.5 | 12.6 | 5.3 |
| Sep | 29° / 25° | 100 | 16.4 | 12.1 | 4.8 |
| Oct | 28° / 24° | 145 | 18.3 | 11.6 | 5.2 |
| Nov | 27° / 24° | 84 | 12.2 | 11.1 | 6.3 |
| Dec | 27° / 23° | 27 | 6 | 10.9 | 7.6 |
Cloud cover in September
The sky is clear or mostly clear about 32% of the time in September, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 50%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 50 | 50 | 50 | 49 | 48 | 47 | 46 | 47 | 46 | 46 | 46 | 46 | 46 | 47 |
| Cloudier (%) | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 50 | 50 | 50 | 51 | 52 | 53 | 54 | 53 | 54 | 54 | 54 | 54 | 54 | 53 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 51 | 49 |
| 3 | 52 | 48 |
| 4 | 52 | 48 |
| 5 | 52 | 48 |
| 6 | 53 | 47 |
| 7 | 53 | 47 |
| 8 | 53 | 47 |
| 9 | 53 | 47 |
| 10 | 52 | 48 |
| 11 | 52 | 48 |
| 12 | 52 | 48 |
| 13 | 52 | 48 |
| 14 | 52 | 48 |
| 15 | 52 | 48 |
| 16 | 51 | 49 |
| 17 | 50 | 50 |
| 18 | 50 | 50 |
| 19 | 50 | 50 |
| 20 | 49 | 51 |
| 21 | 48 | 52 |
| 22 | 47 | 53 |
| 23 | 46 | 54 |
| 24 | 47 | 53 |
| 25 | 46 | 54 |
| 26 | 46 | 54 |
| 27 | 46 | 54 |
| 28 | 46 | 54 |
| 29 | 46 | 54 |
| 30 | 47 | 53 |
Chance of precipitation in September
Les Cayes gets around 100 mm of rain over 16.4 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 55% and peaks near 61% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 49 | 48 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 55 | 56 | 57 | 57 | 58 | 58 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 61 |
| Rain chance (%) | |
|---|---|
| 1 | 49 |
| 2 | 48 |
| 3 | 48 |
| 4 | 48 |
| 5 | 48 |
| 6 | 49 |
| 7 | 49 |
| 8 | 49 |
| 9 | 50 |
| 10 | 51 |
| 11 | 52 |
| 12 | 53 |
| 13 | 54 |
| 14 | 55 |
| 15 | 55 |
| 16 | 56 |
| 17 | 57 |
| 18 | 57 |
| 19 | 58 |
| 20 | 58 |
| 21 | 59 |
| 22 | 59 |
| 23 | 60 |
| 24 | 60 |
| 25 | 60 |
| 26 | 61 |
| 27 | 61 |
| 28 | 61 |
| 29 | 61 |
| 30 | 61 |
Humidity in September
Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the oppressive band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Oppressive (%) | 97 | 97 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 97 | 97 | 97 | 97 | 97 | 98 | 98 | 98 | 98 | 98 | 97 | 97 |
| Miserable (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 0 | 97 | 3 |
| 2 | 0 | 97 | 3 |
| 3 | 1 | 96 | 3 |
| 4 | 1 | 96 | 3 |
| 5 | 1 | 96 | 3 |
| 6 | 1 | 96 | 3 |
| 7 | 1 | 96 | 3 |
| 8 | 1 | 96 | 3 |
| 9 | 1 | 96 | 3 |
| 10 | 1 | 96 | 3 |
| 11 | 1 | 96 | 3 |
| 12 | 1 | 96 | 3 |
| 13 | 1 | 96 | 3 |
| 14 | 1 | 96 | 3 |
| 15 | 1 | 96 | 3 |
| 16 | 1 | 96 | 3 |
| 17 | 1 | 96 | 3 |
| 18 | 1 | 96 | 3 |
| 19 | 1 | 97 | 2 |
| 20 | 1 | 97 | 2 |
| 21 | 1 | 97 | 2 |
| 22 | 1 | 97 | 2 |
| 23 | 1 | 97 | 2 |
| 24 | 0 | 98 | 2 |
| 25 | 0 | 98 | 2 |
| 26 | 0 | 98 | 2 |
| 27 | 0 | 98 | 2 |
| 28 | 0 | 98 | 2 |
| 29 | 1 | 97 | 2 |
| 30 | 1 | 97 | 2 |
Wind in September
Winds average 9 km/h in September.
Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 24 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 30 minutes over September. Sunrise moves from 5:44 AM to 5:49 AM, and sunset from 6:06 PM to 5:40 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 |
| Sunrise (AM) | 5:44 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:48 | 5:48 | 5:48 | 5:48 | 5:48 | 5:48 | 5:49 |
| Sunset (PM) | 6:06 | 6:05 | 6:04 | 6:03 | 6:02 | 6:01 | 6:00 | 6:00 | 5:59 | 5:58 | 5:57 | 5:56 | 5:55 | 5:54 | 5:53 | 5:52 | 5:51 | 5:51 | 5:50 | 5:49 | 5:48 | 5:47 | 5:46 | 5:45 | 5:44 | 5:43 | 5:43 | 5:42 | 5:41 | 5:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 5:44 | 6:06 |
| 2 | 12.3 | 5:44 | 6:05 |
| 3 | 12.3 | 5:44 | 6:04 |
| 4 | 12.3 | 5:44 | 6:03 |
| 5 | 12.3 | 5:45 | 6:02 |
| 6 | 12.3 | 5:45 | 6:01 |
| 7 | 12.3 | 5:45 | 6:00 |
| 8 | 12.2 | 5:45 | 6:00 |
| 9 | 12.2 | 5:45 | 5:59 |
| 10 | 12.2 | 5:45 | 5:58 |
| 11 | 12.2 | 5:45 | 5:57 |
| 12 | 12.2 | 5:46 | 5:56 |
| 13 | 12.2 | 5:46 | 5:55 |
| 14 | 12.1 | 5:46 | 5:54 |
| 15 | 12.1 | 5:46 | 5:53 |
| 16 | 12.1 | 5:46 | 5:52 |
| 17 | 12.1 | 5:46 | 5:51 |
| 18 | 12.1 | 5:47 | 5:51 |
| 19 | 12.0 | 5:47 | 5:50 |
| 20 | 12.0 | 5:47 | 5:49 |
| 21 | 12.0 | 5:47 | 5:48 |
| 22 | 12.0 | 5:47 | 5:47 |
| 23 | 12.0 | 5:47 | 5:46 |
| 24 | 12.0 | 5:48 | 5:45 |
| 25 | 11.9 | 5:48 | 5:44 |
| 26 | 11.9 | 5:48 | 5:43 |
| 27 | 11.9 | 5:48 | 5:43 |
| 28 | 11.9 | 5:48 | 5:42 |
| 29 | 11.9 | 5:48 | 5:41 |
| 30 | 11.9 | 5:49 | 5:40 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6 kWh/m².
For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.83 kWh/m² in July across the year — September's 6 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.1 | Intense |
| 13 | 6.1 | Intense |
| 14 | 6.1 | Intense |
| 15 | 6.0 | Intense |
| 16 | 6.0 | Intense |
| 17 | 6.0 | Bright |
| 18 | 6.0 | Bright |
| 19 | 5.9 | Bright |
| 20 | 5.9 | Bright |
| 21 | 5.8 | Bright |
| 22 | 5.8 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.7 | Bright |
| 25 | 5.7 | Bright |
| 26 | 5.7 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.5 | Bright |
| 30 | 5.5 | Bright |
Hazard calendar for Les Cayes
In September, Les Cayes sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.
Les Cayes sits in the Atlantic hurricane belt; the season peaks August–October.
Les Cayes's rainy season runs August–November, when most of the year's rain falls.
Les Cayes sees seasonal dust haze (July), heaviest in July.
Is September a good time to visit Les Cayes?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Les Cayes for sightseeing.
What to pack for Les Cayes in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Les Cayes sees daytime highs around 29°C and nights near 25°C. Pack light clothes, rain gear and sun protection. About 16 days see rain.
Sea temperature near Les Cayes in September
The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 15 km away) is warmest in September at about 29°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Les Cayes in September
Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Les Cayes peaks around June 12 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 12 | 12 | 12 | 12 | 11 | 12 | 12 | 11 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Les Cayes in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Les Cayes is worst in July — around 29 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (December, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 9 | 9 | 11 | 18 | 29 | 29 | 23 | 16 | 15 | 9 | 7 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 9 | Good |
| Mar | 9 | Good |
| Apr | 11 | Good |
| May | 18 | Moderate |
| Jun | 29 | Moderate |
| Jul | 29 | Moderate |
| Aug | 23 | Moderate |
| Sep | 16 | Moderate |
| Oct | 15 | Moderate |
| Nov | 9 | Good |
| Dec | 7 | Good |
Where is Les Cayes?
Les Cayes sits at 18.2°N, 73.7°W, 1 m above sea level, in Haiti. The nearest listed city is Jérémie, 64 km away.
Topography around Les Cayes
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Les Cayes.
Within 3 km, the terrain around Les Cayes has only modest variations in elevation — a maximum elevation change of 38 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 354 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,322 m.
The land around Les Cayes is covered by water (45%) within 3 km, water (43%) and grassland (28%) within 16 km, and water (64%) and trees (23%) within 80 km.
Haiti travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type A / B
- 110 V · 60 Hz
- Prices
- ≈ 86% of US
- price level, 2025
- GDP per capita
- $2,694
- 2025
- Happiness
- 3.6 / 10
- World Happiness, 2020
- Homicide rate
- 41.2
- per 100k, 2023
- Road deaths
- 18.8
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Very low
- EF EPI 444
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Les Cayes (18.192°, -73.7495°, elevation 1 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).