Last updated: July 31, 2025
Saint Martin boasts a tropical climate, characterized by warm temperatures and a distinct wet season. The maximum temperature peaks at 29°C (85°F) in September, while the average year-round temperature remains a pleasant 26°C (80°F). Visitors can expect cooler evenings with a minimum of 22°C (72°F) in February. Over the course of the year, the island receives an average of 821 mm (32.3 in) of precipitation, with rainfall distributed across approximately 14 to 22 days each month. September is typically the wettest month, while the summer months experience high humidity, peaking at 83% in July. Even in the drier months, such as February, humidity remains relatively comfortable at 77%. Overall, the climate of Saint Martin offers a delightful balance of warmth and moisture, making it an appealing destination year-round.
Saint Martin experiences a tropical savanna climate classified under the Köppen-Geiger system as Aw. This means the island enjoys warm temperatures year-round, with distinct wet and dry seasons. Rainfall is more prevalent from May to November, aligning with the Caribbean's peak hurricane season, while the dry season typically spans from December to April. With average annual temperatures consistently hovering around 27°C (81°F), visitors can bask in the sun-drenched allure, making it a year-round destination for beach lovers and adventure seekers alike. The island's lush vegetation thrives in this warm climate, contributing to its breathtaking landscapes and vibrant ecosystems.
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Saint Martin enjoys a tropical climate that keeps temperatures pleasantly warm throughout the year. In the winter months of January and February, daytime temperatures hover between a comfortable 25°C (77°F) and a max of 27°C (81°F). As spring approaches in March and April, the warmth continues with similar averages, just slightly nudging higher, while May marks the beginning of a gradual increase, peaking at 28°C (82°F). Summer months (June to September) see a rise in warmth, with highs consistently reaching 29°C (84°F), maintaining an inviting atmosphere for beachgoers. This warmth persists into October, before cooling slightly in November and December, but still remains favorable at around 27°C (81°F). Overall, Saint Martin's temperatures create an inviting ambiance year-round, perfect for both relaxation and adventure.
Saint Martin experiences distinct precipitation patterns throughout the year, with a gradual increase leading into the summer months. Starting with relatively low rainfall in January (35 mm) and February (35 mm), the region transitions into a wetter phase by late spring. Notably, June marks the beginning of significant rainfall, escalating to July and August, where totals reach 83 mm and 87 mm respectively. The peak occurs in September, with an impressive 161 mm of rain, often accompanied by increased storm activity. As the year progresses into October and November, rainfall begins to taper off, yet remains substantial. This trend of rising precipitation from mid-year, followed by a decline, highlights the tropical climate's characteristic wet season, painting a vivid picture of Saint Martin’s dynamic weather patterns.
The humidity levels in Saint Martin exhibit a consistently tropical climate, hovering near the upper 70s throughout the year. From January to March, the humidity remains stable at 77%, creating a comfortable environment ideal for visitors. As spring progresses into summer, we see a gradual increase, peaking in July at 83%, which brings a palpable warmth and lushness to the island. The humidity slightly decreases as autumn arrives, with levels dropping to 79% in both October and November, before dipping again to 78% in December. This fluid dynamic of humidity not only contributes to the island’s verdant landscapes but also sets a serene backdrop for those seeking a tropical escape.
Saint Martin experiences a significant increase in UV Index values from January to September, with a notable peak of 14 in September, categorizing it as extreme and allowing for a quick burn time of just 10 minutes. Throughout the spring and summer months, the UV Index remains consistently high at 13, emphasizing the need for vigilant sun protection. A slight decline occurs in October, dropping to 12, before reverting to very high levels of 9 during the winter months of November and December, allowing for a safer 15-minute burn time. Overall, the data highlights a clear trend of increasing UV exposure during the year, particularly from late winter to early autumn, urging visitors to stay sun-smart and proactive in their sun safety practices.
UV Risk Categories
Saint Martin basks in an abundance of sunlight throughout the year, with a noticeable surge in brightness from January to May. Starting with 259 hours in January, the island experiences a steady increase, peaking at an impressive 363 hours in May. As summer approaches, the sunshine remains generous, with only slight fluctuations, such as 362 hours in July and 351 hours in August. The autumn months see a gradual dip, settling around 322 hours in both September and October, before a slight recovery in November with 308 hours. December rounds out the year with 323 hours, ensuring that this sun-soaked paradise remains a warm haven for sun-seekers year-round.
Saint Martin boasts a dynamic climate, characterized by varying chances of sunny weather throughout the year. February and March shine as the sunniest months, with an impressive 72% likelihood of bright skies, while November and December closely follow at 67% and 66%, respectively. As spring approaches, the chances dip in April to 48%, but quickly rebound in May. Conversely, the summer months present more fluctuating conditions, with June hitting a low of 25%; however, July and August manage to stabilize around the 50% mark. As the year progresses, September and October see sun probabilities returning to a comfortable 58% and 56%, maintaining a pleasant fall atmosphere. Overall, visitors can expect a blend of sunny days and cloudier periods, making each month an appealing time to experience the island's charm.
In Saint Martin, daylight hours display a captivating rhythm throughout the year, creating an inviting atmosphere for both locals and visitors. From January to February, the island enjoys a steady 11 hours of daylight, providing a consistent backdrop for leisurely activities. As spring approaches in March and April, the daylight extends to 12 hours, encouraging more outdoor explorations. The longest days of summer arrive in June and July, offering an impressive 13 hours of sunshine, perfect for sun-soaking and beach adventures. However, as the seasons shift towards autumn, daylight hours gradually decrease, settling back to 11 hours by November, creating a gentle lull that signals the end of the year. This harmonious cycle of daylight not only enhances the island's allure but also invites everyone to embrace its vibrant beauty throughout the seasons.
The climate of Saint Martin presents a captivating blend of warmth and moisture throughout the year, characterized by modest temperature variations and an intriguing rhythm of precipitation. From the cool embrace of January's average 25°C (77°F), the island gradually warms, peaking in the summer months of July and August at a balmy 28°C (82°F). Meanwhile, the humidity levels rise alongside the temperatures, reaching a peak of 83% in July. A notable increase in rainfall is seen from late summer into fall, with September marked by the highest number of rainy days at 22. Despite this, the island's tropical climate remains inviting, making it a year-round haven for those seeking sun-soaked adventures tempered by the refreshing Caribbean breezes. This harmonious interplay of warmth, humidity, and rainfall truly defines the essence of Saint Martin's delightful climate.