Last updated: August 27, 2025
September in Sint Maarten, Netherlands, showcases a mild climate that balances warmth and refreshing breezes. With maximum temperatures reaching 25°C (78°F) and an average of 16°C (61°F), the island offers a comfortable escape. However, visitors should come prepared for some rain, as the month typically experiences 92 mm (3.6 in) of precipitation over about 12 days, accompanied by a humidity level of 83%. The mixture of warm days and occasional showers creates an inviting atmosphere for both relaxation and exploration.
In September, Sint Maarten settles into a pleasant transition as temperatures begin to cool slightly from the summer highs. With a minimum of 9°C (49°F) and a maximum reaching 25°C (78°F), the month presents a comfortable average of 16°C (61°F). This marks a subtle shift from the warm August climate, where the minimum and maximum were steadier at 12°C (54°F) and 29°C (84°F), respectively. As the days grow shorter and autumn approaches, September offers an inviting atmosphere, making it an ideal time for visitors to explore the island's natural beauty and vibrant culture amidst a backdrop of mild temperatures.
In September, Sint Maarten experiences a significant dip in precipitation compared to the summer months, with 92 mm (3.6 in) of rainfall over 12 days. While this amount is slightly lower than August's record of 94 mm (3.7 in), it remains among the highest of the year, following the trend of increasing rainfall through the late summer. The month serves as a transitional period, as it paves the way for even wetter conditions in October, which averages 117 mm (4.6 in) over a more substantial 17 days. This variation indicates a progressive shift where September tends to retain some of summer's moisture before ushering in the more intense rainfalls of autumn, highlighting the region's tropical climate characteristics.
In September, Sint Maarten experiences a relative humidity level of 83%, which reflects a subtle rebound from the summer months. As the peak of the humid season winds down, the island shows a slight uptick from the 78% humidity recorded in August. This increase is typical for early autumn, as warm seawater and periodic tropical influences keep the atmosphere moist. Interestingly, the humidity begins to rise again as the island transitions into the fall months, hovering close to the high levels observed earlier in the year—with values reaching 86% in October. Thus, September serves as a transition point, offering a hint of the humidity that defines Sint Maarten's climate throughout the rest of the year.
In September, Sint Maarten experiences a moderate UV Index of 5, marking a slight drop from the very high levels seen in the peak summer months of June and July. With a burn time of approximately 30 minutes, this month is an excellent reminder that sun safety remains important even as the summer heat begins to wane. As temperatures transition, visitors can still bask in the sunshine while being mindful of their exposure. Whether you're lounging on the beach or exploring the local sights, it's essential to stay protected. For more detailed insights, visit Sint Maarten UV Index.
UV Risk Categories
September in Sint Maarten continues the trend of abundant sunshine that characterizes the summer months, boasting a remarkable 330 hours of bright, sunny days. This figure, while slightly lower than the peaks of July and August, still reflects the island’s reputation as a sun-soaked paradise. The gradual decline in sunshine hours from the summer climax hints at the impending transition into the fall, yet it remains a delightful time for visitors, balancing warmth with pleasant breezes. As the months turn towards October, the sunny days remain plentiful, signaling that Sint Maarten's charm endures beyond the peak summer season.
In September, the likelihood of sunny weather in Sint Maarten shows a notable decline, with a 31% chance of sunshine. This percentage is a slight dip from the vibrant summer months of July and August, which hover around 37%. The trend suggests that as summer transitions to fall, the sunny days begin to fade, yet September still represents a solid opportunity for sun-seekers compared to the bleaker months that follow. With October and November dropping significantly to 27% and 22% respectively, September remains a popular time for travelers eager to enjoy one last taste of sun before the rainy season begins.
As summer fades and September arrives in Sint Maarten, the island experiences a gentle transition from the long, sun-soaked days of July and August, where daylight peaked at 16 hours. By September, daylight enjoys a comfortable reduction to 12 hours, marking a shift towards autumn. This trend follows the natural progression from the brighter months, as daylight gradually diminishes with the approach of October's 10 hours. Overall, September offers a delightful balance, blending the warmth of lingering summer sunlight with hints of the upcoming seasonal change. This rhythm of daylight not only shapes the daily activities but also enhances the island's enchanting ambiance during this time of year.
September winds in Sint Maarten usher in a gentle breeze with an average speed of 4.8 m/s (11 mph), marking a notable dip compared to earlier months. Following the summer's more robust winds, which averaged 5.9 m/s (13 mph) in August, the transition into fall brings a calmer atmosphere. This decrease in wind speed is part of a broader trend observed over the summer months, where winds consistently softening from 6.6 m/s (15 mph) in the peak winter months to a low of 4.4 m/s (10 mph) in June. However, as October approaches, anticipation builds for the return of stronger gusts, hinting at a seasonal shift toward more dynamic weather patterns. The rhythmic ebb and flow of the winds in Sint Maarten reflects the island's unique climatic charm, inviting both relaxation and adventure.
Weather in Sint Maarten varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sint Maarten, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinctly different weather patterns. September enjoys a mild climate with average temperatures ranging from a minimum of 9°C (49°F) to a comfortable maximum of 25°C (78°F), accompanied by relatively high humidity at 83%. Rainfall is moderate, with around 92 mm (3.6 in) falling over approximately 12 days. In contrast, January is much colder, with average temperatures between -3°C (27°F) and a peak of 12°C (53°F). This month also sees a bit less precipitation, totaling 62 mm (2.4 in) over about 13 days, but the humidity remains quite high at 87%. For more details on January weather, you can check Sint Maarten weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a pleasant 9°C (49°F) at night to a warm 25°C (78°F) during the day, with an average of 16°C (61°F). This month experiences a relatively high humidity level of 83% and significant rainfall, receiving about 92 mm (3.6 in) over 12 days. In contrast, February is much colder, with temperatures dipping as low as -6°C (21°F) and only reaching a maximum of 14°C (58°F), averaging around 5°C (42°F). Despite having slightly less precipitation at 71 mm (2.8 in) over the same number of days, February brings higher humidity at 87%. For those interested in the specifics of February's climate, you can learn more by visiting Sint Maarten weather in February.
September and March present contrasting weather conditions. In September, temperatures vary from a minimum of 9°C (49°F) to a maximum of 25°C (78°F), with an average of 16°C (61°F). The month is relatively humid, with an average humidity of 83% and about 92 mm (3.6 in) of precipitation over 12 days. In contrast, March experiences cooler temperatures, ranging from a minimum of -7°C (20°F) to a maximum of 15°C (60°F), with an average temperature of 6°C (44°F). Although March has slightly less precipitation at 67 mm (2.6 in) over 13 days, it also has a higher humidity level of 86%. For more details about March weather, visit Sint Maarten weather in March.
September and April present notably different weather patterns. In September, the temperatures range from a chilly minimum of 9°C (49°F) to a warm maximum of 25°C (78°F), with an average of 16°C (61°F). This month also sees higher precipitation levels, with 92 mm (3.6 in) falling over approximately 12 days and relative humidity at 83%. In contrast, April experiences cooler temperatures, with a minimum of 2°C (36°F) and a slightly higher maximum of 23°C (74°F), averaging 9°C (48°F). Precipitation is much lower in April, at 37 mm (1.5 in) spread over 8 days, with humidity slightly elevated at 85%. For a more detailed look at the weather in April, check out Sint Maarten weather in April.
In comparing the weather between September and May, September tends to be warmer overall, with average temperatures reaching 16°C (61°F), while May has a cooler average of 12°C (54°F). Both months experience similar humidity levels, with September at 83% and May slightly higher at 84%. However, September is noticeably wetter, receiving 92 mm (3.6 in) of precipitation over 12 days, compared to May's 44 mm (1.7 in) over 9 days. For a more detailed look at May conditions, you can check out Sint Maarten weather in May.
September and June exhibit notable differences in weather characteristics. In September, temperatures range from a minimum of 9°C to a maximum of 25°C, with an average of 16°C. This month experiences higher precipitation, totaling 92 mm over 12 days, and a humidity level of 83%. In contrast, June has a slightly warmer temperature spectrum, with minimums at 10°C and maximums reaching 29°C, averaging 16°C as well. Additionally, June sees less rainfall, with 66 mm over 10 days and slightly lower humidity at 81%. For a detailed look at June weather, refer to Sint Maarten weather in June.
When comparing the weather in September and July, September tends to be cooler and wetter. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 25°C (78°F), with an average of 16°C (61°F). In contrast, July enjoys warmer temperatures, with lows of 12°C (53°F) and peaks reaching 30°C (87°F), averaging 18°C (64°F). July also sees less precipitation, totaling 69 mm (2.7 in) over 13 days, compared to September's 92 mm (3.6 in) across 12 days. Humidity levels are slightly higher in September at 83%, while July maintains a relative humidity of 80%. For a more detailed look at July's weather, visit Sint Maarten weather in July.
In comparing the weather of September and August, September tends to be slightly cooler, with average temperatures ranging from 9°C (49°F) to 25°C (78°F), while August offers warmer conditions with temperatures between 12°C (54°F) and 29°C (84°F). Both months experience similar levels of precipitation, with September receiving 92 mm (3.6 in) over 12 days, and August slightly higher at 94 mm (3.7 in) over 15 days. Humidity levels are also higher in September, averaging 83% compared to August's 78%. For more detailed insights, you can check Sint Maarten weather in August.
In September, temperatures in Sint Maarten range from a minimum of 9°C (49°F) to a maximum of 25°C (78°F), with an average of 16°C (61°F). The month sees about 92 mm (3.6 in) of rainfall over 12 days and a humidity level of approximately 83%. In contrast, October experiences slightly cooler weather, with minimums dropping to 5°C (41°F) and an average of 13°C (56°F), while maximum temperatures reach 23°C (73°F). Additionally, October brings increased precipitation, totaling 117 mm (4.6 in) over 17 days and a marginal rise in humidity to 86%. For a detailed look at what to expect, you can check out Sint Maarten weather in October.
September tends to be warmer and more humid than November, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 25°C (78°F) and an average of 16°C (61°F). This month also experiences higher precipitation, with 92 mm (3.6 in) falling over 12 days. In contrast, November sees cooler temperatures, with a minimum of 1°C (35°F) and a maximum of 17°C (62°F), averaging around 9°C (48°F). Although November has lower total precipitation at 68 mm (2.7 in), it is still marked by rainfall on about 15 days, and the humidity increases slightly to 87%. For more details about November weather, check out Sint Maarten weather in November.
September and December present distinct contrasts in weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 25°C (78°F), with an average of 16°C (61°F). The month experiences 92 mm (3.6 in) of precipitation over 12 days, along with high humidity at 83%. In stark contrast, December sees cooler temperatures, with a minimum of -2°C (28°F), an average of 7°C (44°F), and a maximum of only 12°C (54°F). Precipitation increases slightly to 106 mm (4.2 in) spread across 18 days, while humidity remains high at 86%. For more insights on December weather, you can check Sint Maarten weather in December.
September in Sint Maarten offers a unique escape from the typical tropical allure, as it stands out with cooler temperatures and increased rainfall compared to other months. With an average high around 25°C and notable humidity levels at 83%, visitors will experience a refreshing shift from the often blistering heat seen in peak summer. While rain is more frequent, bringing about 12 precipitation days, this moisture contributes to the lushness of the island’s landscapes. For those seeking a more tranquil experience amidst mild weather, September can be an enchanting time to enjoy Sint Maarten's beauty. Explore more about the island's climate in detail through this link: Sint Maarten Climate.