In Martinique, the climate is tropical, hot and humid all year round, with a relatively cool and dry season from January to mid-April, called carême (Lent), and a hot, humid and rainy season from mid-June to mid-November, called hivernage (whose root reminds of the winter, although it is a hot season, and also quite sunny). In the former period, the northeast trade winds, constant winds typical of tropical climates, blow steadily and with moderate intensity, while in the latter period the winds are more irregular, and may have some breaks, increasing the feeling of sultriness. Between them there are two transitional periods: from mid November to early January (when the northeast wind starts to blow, the temperature decreases a bit and the weather gets better) and from mid-April to Mid-June (when both the temperature and the frequency of downpours gradually increase).
The relative humidity is high throughout the year and remains above 70% even in the afternoon.
Here are the average temperatures recorded in Le Lamentin, the second city of the island. As you can see, there are little variations between the coolest and the warmest period.

Martinique is an island, which has the status of a French overseas department.
Rainfall in Martinique varies greatly in quantity depending on the area, but follows the same pattern and are more frequent and abundant from May to November (with a peak from July to November) and less frequent and shorter from December to April (with February and March as the driest months).
The northern part of the island, occupied by hills and mountains, is rainier than the south. In particular, on the slopes of Mount Pelée, 1,397 meters (4,583 feet) high, and of the Carbet Mountains, which reach a height of 1,197 meters (3,927 feet), the rains are very abundant, in fact they exceed 4,000 mm (160 in) per year; moreover, the sky is often cloudy, and there is no real dry season, so much so that the climate can be called equatorial, as evidenced by the lush vegetation.
In the capital, Fort-de-France, which is located in the central part of the island, 2,000 millimeters (79 inches) of rain fall per year, of which more than 100 millimeters (4 inches) fall per month from May to December, and among these, more than 200 mm (8 in) from July to November, which is the rainiest period. The least rainy period is from February to April, with 65/90 mm (2.5/3.5 in) on average. Here is the average precipitation.

In the southern part of the island, precipitation drops below 2,000 mm (79 in) per year, and along the east and south coasts it goes down to around 1,200/1,500 mm (47/60 in) per year.
The rains in Martinique occur throughout the year especially as downpours or thunderstorms, which could be intense, but generally do not last long, so they do not reduce too much the sunshine hours; sometimes, however, there may be a more intense wave of bad weather.
In fact, the amount of sunshine is good all year round, at least along the coasts, as can be seen in the following table.



The sea is pleasantly warm all year round, as we can see from the following table.

Hurricanes

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Martinique may be affected by tropical storms and cyclones, called hurricanes in the Caribbean, which can affect this area from June to November, though they are most likely from August to October.

Best Time

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The best time to visit Martinique is from February to April, since it is the least rainy period. December and January are a bit more rainy, but less than in the peak period of July-November: considering that they are in the least hot period, and that there may be some showers in all seasons, after all, you can also choose December and January.

What to pack

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All year round: bring light clothes of natural fabric, a sun hat, sunscreen, possibly a light sweatshirt and a light raincoat for thunderstorms. A light sweatshirt for the evening from December to March.
When going to the reef, you can bring snorkeling equipment, including water shoes or rubber-soled shoes.
When going hiking in the mountains, bring a sweatshirt, a raincoat and hiking boots.