Climate Overview
The climate in Les Cayes is hot. The average annual temperature is 26°C and approximately 1159mm of precipitation falls per year. October is the wettest month, receiving around 554mm of rainfall. Les Cayes is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, July, August. The coldest months are February, January, March, when temperatures can drop to 23°C.
Temperature
Les Cayes has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is September, when average highs reach 30°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 23°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.
Precipitation
Les Cayes is a moderately rainy area, receiving approximately 1159mm of precipitation annually, which averages out to around 97mm per month. The wettest month is October, averaging 554mm of rainfall. May and August also tend to see above-average precipitation. The driest month is December, with just 14mm. That's 539mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Les Cayes is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 2km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
51 days until Autumn
It is currently summer in Les Cayes, which began on June 21, 2026. Les Cayes is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in September at around 30°C, while the coldest stretch bottoms out in February near 23°C. Autumn is next, beginning on September 23, 2026 — 51 days from now.
Spring
Temperatures range from 24 to 28°C. Precipitation is moderate at around 240mm for the season, averaging 80mm per month. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 30°C. Precipitation is moderate at around 183mm for the season, averaging 61mm per month. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 649mm across the season with a monthly average of 216mm. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 28°C. Rainfall is relatively light, with around 86mm over the season and a monthly average of 29mm. Winds are generally light, averaging 2km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Les Cayes is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 36mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 30°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Les Cayes based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
