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Climate - Saint Barthelemy


Average weather, temperature, rainfall, sunshine

Flag - Saint Barthelemy

Map - Saint Barthelemy

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In Saint-Barthélemy, the climate is tropical, hot all year round, with a relatively cool season from December to April, called "the Lent", and a hot and humid season from May to November, called "the Wintering". Despite the name, the latter is a sultry period, characterized by many sunshine hours, but also by showers or thunderstorms, especially in the afternoon.
Saint-Barthélemy (also known as Saint-Barth or St. Barts) is a small island, which was part of the French overseas department of Guadeloupe before 2007, while it used to be an overseas territory of France before 2003.
Because of the lack of mountains and rivers, there is a certain shortage of water available, so the water is collected from the rain, desalinated from the sea, or obtained from incinerators.
The temperature varies little throughout the year: the minimum ranges from 23 degrees Celsius (73 °F) in the period from January to March to 26 °C (79 °F) in the period from June to September, while the maximum ranges from 28.5 °C (83.5 °F) to 32 °C (90 °F). In the hot and muggy period, however, sea breezes temper the heat.

Climate chart - Gustavia

Here are the average temperatures of the capital, Gustavia.
Gustavia - Average temperatures (1981-2010)
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January23.228.425.8748378.4
February22.928.425.6738378.2
March23.22926.1748479
April23.929.826.8758680.3
May24.930.727.8778782
June25.731.228.4788883.2
July25.831.128.4788883.2
August2631.528.8798983.8
September25.931.628.8798983.8
October25.431.228.3788882.9
November24.629.727.2768580.9
December23.828.726.2758479.2
Year24.630.127.376.386.281

Precipitation is not abundant, since it amounts to about 950 millimeters (37.5 inches) per year. In the wettest months, from August to December, from 90 to 135 mm (3.5 to 5.3 in) of rain fall per month. From January to April, the driest period, the rainfall hovers around 45/60 mm (1.7/2.3 in) per month.
Here is the average precipitation.
Gustavia - Average precipitation
MonthMillimetersInchesDays
January552.212
February451.810
March5028
April602.48
May803.110
June552.29
July75312
August903.513
September1003.911
October1355.312
November1305.114
December903.513
Year96037.8131

The amount of sunshine is good in all seasons, since the rains are usually intense but short-lived, so the sun often shines throughout the year. Here are the average sunshine hours per day.
Gustavia - Sunshine hours
MonthAverageTotal
January8250
February8225
March9280
April9270
May8250
June8240
July8250
August9280
September8240
October8250
November8240
December8250
Year8.33015

Saint-Barthélemy

In Saint-Barthélemy, as generally happens in the Lesser Antilles, being that the sea is always warm, you can swim all year round.
Gustavia - Sea temperature
MonthCelsius (°C)Fahrenheit (°F)
January2680
February2679
March2679
April2780
May2781
June2882
July2883
August2983
September2984
October2984
November2883
December2781
Year27.681.6

Hurricanes



From June to November, in Saint-Barthélemy as in all the Caribbean, there is the danger of tropical storms and hurricanes, which, however, are more likely from August to October.

When to go



The best period to visit Saint-Barthélemy runs from January to April, since it is the least hot and the least rainy period of the year. The driest months are February and March.
In May, both temperature and moisture increase, but the rains are still not too abundant, and we are still out of the hurricane season.
In June and July, we are, by now, in the hot and muggy season, although the rains are less frequent than in August and September, and hurricanes are less likely to occur.

What to pack



All year round: bring light clothes of natural fabric; possibly a light sweatshirt and a light raincoat for thunderstorms, especially from August to December. From December to March, you can add a light sweatshirt for the evening.
When going to the reef, you can bring snorkeling equipment, including water shoes or rubber-soled shoes.

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