Last updated: July 31, 2025
Nestled in the Caribbean, Sint Maarten boasts a warm climate characterized by a maximum temperature of 29°C (85°F) in September and a cooler minimum of 22°C (72°F) in February. The island experiences an average annual temperature of 26°C (80°F), making it an inviting destination year-round. With total annual precipitation reaching 821 mm (32.3 in), the rainiest month is September, with 22 wet days, while months like March and April are driest, recording just 10 to 11 days of rain. Humidity levels also vary, peaking at 83% in July and dipping to 77% in February, contributing to the tropical feel of this stunning locale. Visitors to Sint Maarten can expect warmth and moisture, encapsulating the essence of island life.
Sint Maarten experiences a Köppen-Geiger Climate class labeled as Aw, indicating a tropical savanna climate. This means the island enjoys warm temperatures year-round, typically averaging around 27°C (81°F), with a distinct dry season that contrasts sharply with its wetter months. The lush landscapes, characterized by vibrant greenery and diverse flora, thrive in response to the seasonal rainfall, while the gentle sea breezes provide a refreshing respite from the warm sun. Overall, Sint Maarten's climate not only shapes its stunning natural beauty but also influences the vibrant lifestyle of its residents and visitors alike.
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Sint Maarten boasts a tropical climate that delights sun-seekers year-round. January through March sees mild temperatures, with averages stabilizing around 25°C (77°F), making this an ideal time for a comfortable getaway. As the island transitions into April and May, the days warm slightly, with average highs reaching 26°C to 28°C (79°F to 82°F), inviting visitors to enjoy the vibrant beaches. June through August brings the peak warm months, featuring nightly lows around 25°C (77°F) and afternoon highs often touching 29°C (84°F), perfect for lounging under the sun. As the summer fades into September and October, temperatures remain steady, with averages hovering around 28°C (82°F), while the cooler nights return slightly in November and December, providing a refreshing end to the year at 24°C (75°F). Whether basking in the warmth of mid-winter or enjoying a balmy summer evening, Sint Maarten offers a delightful climate that enhances its breathtaking scenery.
Sint Maarten experiences distinct precipitation patterns throughout the year, marked by a gradual increase in rainfall from the drier months to the wettest season. From January to April, the island receives relatively low amounts of rain, averaging around 35 mm (1.4 in), with only 11 to 14 rainy days. However, May and June signal the onset of a wetter season, as rainfall escalates to 49 mm (1.9 in) and 50 mm (2.0 in) respectively, with rainfall days hovering around 11 to 14. The transition into late summer brings a dramatic surge in precipitation; in July and August, rainfall peaks at 83 mm (3.3 in) and 87 mm (3.4 in), accompanied by 17 and 16 rainy days. This trend culminates in September, the wettest month, where 161 mm (6.3 in) falls over 22 days. Even as the year winds down, substantial rainfall continues into October and November, with totals of 113 mm (4.5 in) and 96 mm (3.8 in), suggesting that while the intensity of rain diminishes, the pattern of increased precipitation persists through fall before tapering off in December. Overall, the precipitation trends in Sint Maarten underscore a clear seasonal rhythm, characterizing the island's climate.
In Sint Maarten, humidity levels exhibit a subtle yet noticeable trend throughout the year. From January to March, humidity consistently rests at 77%, providing a comfortable atmosphere for visitors. As spring arrives in April, there’s a gentle rise to 78%, signaling the start of warmer days. This gradual increase continues into the summer months, peaking in July at 83%, when the island experiences its most humid conditions. Following this high, humidity begins to slightly ease, falling to 80% in September before stabilizing back to the 79% mark through the end of the year. Overall, while humidity remains generally high, there's a rhythmic fluctuation that mirrors the seasonal transitions, ensuring that Sint Maarten maintains its tropical allure year-round.
Sint Maarten's UV Index reveals a striking seasonal pattern that underscores the need for sun safety throughout the year. Beginning with a very high UV Index of 9 in January, the intensity surges sharply in February, reaching an extreme level of 11. This escalation continues, peaking at 14 in September, the highest recorded during the year. Interestingly, for several months—from March through August—the UV Index remains a consistent 13, highlighting a prolonged period of intense sun exposure. As the year draws to a close, the UV Index returns to a very high level of 9 in both November and December, signaling that even in the cooler months, careful sun management is essential. With burn times as brief as 10 minutes during the summer months, it's vital for residents and visitors alike to prioritize sun protection when enjoying the beautiful beaches of Sint Maarten.
UV Risk Categories
Sint Maarten basks in a generous sunshine glow, with monthly hours peaking in May at 363 hours. The pattern reveals a delightful progression as the year unfolds, beginning with 259 hours in January and culminating in the sun-soaked heights of late spring and summer. From March, when sunshine begins to ramp up to 350 hours, and sustained through the warmer months, the island enjoys an impressive monthly average of over 340 hours, with only slight dips in September and October. The consistency in sunshine, even in November and December, with figures around 308 to 323 hours, suggests that Sint Maarten is a year-round haven for sun lovers, making it an ideal destination for those seeking warmth and brightness.
In Sint Maarten, the likelihood of sunny weather varies throughout the year, showcasing some intriguing trends. February and March stand out as the sunniest months, with an impressive 72% chance of clear skies, making them ideal for travelers seeking a warm escape. Following closely is November at 67%, ensuring pleasant temperatures as the year winds down. Interestingly, the summer months see a dip in sunshine, particularly June with just a 25% chance, hinting at the tropical rains. However, September and October bounce back with 58% and 56% chances, respectively. As we transition into January, the chances of sunshine start at 57%, signaling the start of the year with a favorable climate. Overall, while the sun shines brightly for the majority of the year, the subtleties of weather patterns offer a unique experience in this Caribbean paradise.
In Sint Maarten, the rhythm of daylight hours ebbs and flows throughout the year, creating a vibrant tapestry of light and warmth. During the winter months of January and February, the island enjoys 11 hours of daylight, providing a cozy atmosphere perfect for relaxation. As spring unfolds in March through May, daylight gradually increases to a delightful 12 hours, inviting more time for exploration and outdoor activities. The true peak of summer arrives in June and July, when daylight extends to 13 hours, bathing the island in ample sunshine for beach outings and evening festivities. As the calendar shifts back towards autumn, daylight begins to recede once again, with August and September returning to 12 hours, and finally settling back at 11 hours in the cooler months of October through December. This pattern not only enhances the island's charm but also offers a consistent backdrop for both adventure and relaxation year-round.
The climate of Sint Maarten is characterized by consistently warm temperatures year-round, measuring between 22°C (72°F) in winter months and peaking at 29°C (84°F) during the summer. This creates an inviting environment for beachgoers and nature enthusiasts alike. While precipitation varies across the year, with notably higher rainfall occurring from September to October, the overall trend indicates a balanced distribution of dry and wet days, peaking with 22 rainy days in September. Moreover, humidity levels also exhibit a gradual increase as the year progresses, reaching 83% in July and August, emphasizing the tropical essence of the island. Overall, those visiting Sint Maarten can expect a beautiful tropical climate marked by warmth and lush scenery, although they should be prepared for occasional rainy spells.