Last updated: August 31, 2025
September in Vieux Fort, Saint Lucia offers a warm embrace with average temperatures hovering around 28°C (82°F), peaking at a maximum of 31°C (88°F) and dipping to a pleasant 25°C (77°F) at night. This tropical paradise experiences high humidity levels at 80%, contributing to its lush landscapes. However, visitors should be prepared for frequent rain, as the month sees approximately 136 mm (5.4 in) of precipitation spread over 19 days. The blend of warmth and moisture creates a vibrant atmosphere, making September a unique time to experience the beauty of Vieux Fort.
September in Vieux Fort, Saint Lucia marks a peak in warmth and tropical allure, with temperatures showcasing a notable rise. The month welcomes minimums around 25°C (77°F), effortlessly transitioning to an average of 28°C (82°F), and reaching maximums of 31°C (88°F). This upward trend from the previous months indicates a gradual warming, as August averages hover slightly below this peak. As summer wanes, the island’s lush landscapes are paired with balmy breezes, making September an inviting time for beach lovers and outdoor enthusiasts alike. With humidity rising, visitors can expect vibrant sunsets and the enchanting rhythm of island life, ensuring that this month is both warm and memorable.
September marks a peak in precipitation for Vieux Fort, Saint Lucia, as the region experiences a significant increase in rainfall, totaling 136 mm (5.4 in) over 19 days. This elevation in precipitation is part of the annual trend, where the month follows the already wet August, which sees 121 mm (4.8 in) across 25 days. As the rainy season progresses towards October, which slightly eclipses September with 140 mm (5.5 in), the cumulative rainfall during these months indicates a pattern of increasing moisture, creating a lush landscape that characterizes the region. The notable spike in September rain not only highlights the intensity of the wet season but also prepares the lush terrain for the transition into the drier months later in the year.
In September, Vieux Fort, Saint Lucia, experiences a humidity level of 80%, maintaining a trend of consistent moisture that characterizes the region throughout the year. Following a peak in July at 84%, humidity gently tapers off in August, before stabilizing in September. This slight dip reflects the overall trend of humidity levels, which fluctuate modestly while remaining comfortably high, hovering between 79% and 84% from January through August. As the dry season approaches in the last quarter of the year, humidity begins to rise again, indicating the transition into a wetter climate where conditions remain warm and tropical.
In September, Vieux Fort, Saint Lucia, maintains an extreme UV Index of 14, matching the peak levels seen throughout the summer months. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to take precautionary measures against harmful sun exposure. This consistent high level of UV intensity from January to September, followed by a slight dip in October, indicates that the sun remains a powerful force in this tropical locale. To enjoy the vibrant outdoor lifestyle while staying safe, always be prepared with sunscreen and protective clothing. For detailed information on UV levels throughout the year, check out the Vieux Fort UV Index.
UV Risk Categories
September in Vieux Fort, Saint Lucia, enjoys a delightful blend of sun and warmth, basking in 323 hours of sunshine. This month marks a subtle transition from the sun-drenched days of summer, where May takes the crown with 355 hours, to the slightly cooler, yet still vibrant, days of autumn. With sunshine hours gradually decreasing after the peak of the summer months, September remains steadfastly sunny, contributing to a remarkable yearly total. As the days grow shorter, the consistent rays of sun ensure that the beauty of Vieux Fort remains a radiant backdrop, inspiring a sense of relaxation and rejuvenation during this captivating time of year.
In Vieux Fort, Saint Lucia, September offers a near 50% chance of sunny weather, making it a transitional month as summer gradually gives way to autumn. This likelihood positions September comfortably between the sunnier months of February at 68% and the lower probabilities seen in the earlier summer months like June at just 30%. As the year progresses, the chances of sunshine seem to stabilize, with October following closely at 48%, suggesting that visitors can still enjoy a mix of sun and occasional showers. Though September does not boast the highest percentages, it retains a delightful promise of warmth and brightness, appealing to those looking to escape to this Caribbean paradise.
In Vieux Fort, Saint Lucia, September welcomes a consistent 12 hours of daylight, mirroring the trend established during the summer months. As the island transitions from the vibrant energy of July and August, the daylight duration remains unwavering, offering sun-soaked days perfect for exploration and relaxation. This equilibrium in daylight is a hallmark of the Caribbean's tropical climate, where hours of sunlight stabilize from March through September. Following this period, the days gradually shorten, settling into 11 hours as the year winds down, reflecting the natural rhythm of the seasons. Whether you’re soaking in the sun or enjoying the balmy evenings, September in Vieux Fort is a time to relish in the bountiful daylight.
As September arrives in Vieux Fort, Saint Lucia, the island experiences a noticeable shift in the winds, with an average speed of just 4.3 m/s (10 mph)—the calmest of the year. This decrease follows the summer months, where gusts hovered around 5.5 m/s (12 mph) in August and were generally consistent between 6.7 m/s and 7.8 m/s from January to July. The gentle breezes of September create a serene atmosphere, perfect for leisurely strolls along the beach. As the island transitions into the busier fall season, winds begin to pick up again in October, signaling the return of more robust gusts averaging 6.1 m/s (14 mph). This annual cycle underscores the island's unique relationship with the elements, blending tranquility and vitality throughout the year.
Weather in Vieux Fort varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Vieux Fort, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warmer and more humid, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 31°C (88°F). This month also experiences significant rainfall, averaging 136 mm (5.4 in) across 19 days, contributing to a sultry atmosphere with 80% humidity. In contrast, January brings slightly cooler temperatures, with a minimum of 22°C (73°F) and a maximum of 29°C (84°F). This month is generally drier, receiving only 38 mm (1.5 in) of precipitation over 15 days, while maintaining a similarly high humidity level of 81%. For more detailed information, check Vieux Fort weather in January.
September and February display distinct weather patterns in terms of temperature and precipitation. In September, temperatures are noticeably warmer, with a minimum of 25°C (77°F) and averages reaching up to 28°C (82°F), peaking at 31°C (88°F). The month also sees substantial rainfall, with 136 mm (5.4 in) falling over 19 days, contributing to the humid atmosphere with a consistent humidity level of 80%. In contrast, February offers slightly cooler temperatures, starting at a minimum of 22°C (72°F) and averaging around 25°C (78°F) with a maximum of 29°C (84°F). Rainfall is significantly less, with only 31 mm (1.2 in) over 11 days, while humidity remains steady at 80%. For more detailed weather insights, you can visit Vieux Fort weather in February.
In September, the weather tends to be warmer, with average temperatures ranging from 25°C (77°F) to a high of 31°C (88°F), while March offers slightly cooler temperatures, averaging between 22°C (72°F) and 29°C (84°F). Additionally, September experiences significantly more rainfall, with 136 mm (5.4 in) over 19 days, compared to March's 37 mm (1.4 in) over 13 days. Both months maintain a high humidity level of 80%, creating a tropical atmosphere. For more detailed weather insights during this period, you can check Vieux Fort weather in March.
In comparing the weather between September and April, September is generally warmer and wetter. With average temperatures ranging from 25°C (77°F) to a maximum of 31°C (88°F), it offers a hot end to the summer, while April sees slightly cooler temperatures, with averages between 23°C (74°F) and 29°C (85°F). Additionally, September experiences significantly more rainfall, totaling 136 mm (5.4 in) over 19 days, compared to April's 32 mm (1.3 in) across 12 days. Despite the higher temperatures and humidity in September, April maintains a similar humidity level at 79%. For a detailed overview of April's climate, you can check Vieux Fort weather in April.
In September, the weather is typically warmer than in May, with average temperatures reaching 28°C (82°F) and maximums of 31°C (88°F), compared to May's average of 27°C (81°F) and maximum of 30°C (86°F). September also sees significantly higher rainfall, with a total of 136 mm (5.4 in) spread over 19 rainy days, while May experiences only 39 mm (1.5 in) over 12 days. Humidity levels remain consistent at 80% for both months, contributing to a warm, tropical feel throughout. For more details about the weather, you can check Vieux Fort weather in May.
When comparing the weather in September and June, both months display warm temperatures, but September tends to be slightly warmer and wetter. September boasts a minimum temperature of 25°C (77°F) and an average of 28°C (82°F), with a maximum reaching 31°C (88°F). In contrast, June has a slightly lower minimum temperature of 24°C (76°F) and an average of 27°C (81°F), peaking at 30°C (86°F). Rainfall is more frequent in September, with 136 mm (5.4 in) across 19 days, compared to June's 68 mm (2.7 in) over 17 days. Humidity levels are also high, at 80% in September, compared to 83% in June. For more detailed insights, you can explore Vieux Fort weather in June.
In comparing the weather of September and July, we see that September generally experiences slightly warmer temperatures, with averages reaching 28°C (82°F) compared to July's average of 27°C (81°F). However, both months maintain a warm minimum temperature, with September just edging out at a low of 25°C (77°F) against July's 24°C (76°F). Precipitation is more pronounced in September, with a total of 136 mm (5.4 in) over 19 days, while July has slightly less rainfall at 118 mm (4.6 in) across 24 days. Humidity levels are also comparable, with September at 80% and July at 84%. For more details on July weather specifics, you can check Vieux Fort weather in July.
In comparing the weather of September and August, we see that both months share similar temperature ranges, with September slightly warmer at an average of 28°C compared to August's average of 27°C. Both months have a minimum temperature of 25°C and a maximum that only differs by a degree, with September reaching up to 31°C (88°F) and August up to 30°C (87°F). However, September experiences more precipitation, with 136 mm (5.4 in) over 19 days, compared to August's 121 mm (4.8 in) over 25 days. Humidity is slightly lower in September at 80%, while August sits at 81%. For more details, you can check Vieux Fort weather in August.
September and October weather in Vieux Fort display some similarities, but with subtle changes. In September, the temperature hovers between a minimum of 25°C (77°F) and a maximum of 31°C (88°F), with an average of 28°C (82°F). The month features significant rainfall, totaling 136 mm (5.4 in) across 19 days, and humidity levels are quite high at 80%.
October sees a slight dip in average temperature, with a minimum of 24°C (76°F) and an average of 27°C (81°F), while the maximum remains consistent at 31°C (87°F). Rainfall increases marginally to 140 mm (5.5 in) over 20 days, and humidity rises a bit to 82%. For more detailed information, you can explore Vieux Fort weather in October.
In September, the weather typically features warmer temperatures, with a minimum of 25°C (77°F), an average of 28°C (82°F), and a maximum of 31°C (88°F). Rainfall is quite significant, averaging 136 mm (5.4 in) over 19 days, accompanied by high humidity levels of around 80%. In contrast, November experiences slightly cooler temperatures, where the minimum drops to 24°C (76°F), the average is around 27°C (81°F), and the maximum reaches 30°C (86°F). Additionally, November sees less rainfall, totaling about 108 mm (4.2 in) over 21 days, while humidity levels rise slightly to 83%. For a detailed overview of the weather specific to November, you can check Vieux Fort weather in November.
September typically experiences warmer temperatures, with averages around 28°C (82°F) and maximums peaking at 31°C (88°F). This month is also characterized by higher precipitation, totaling 136 mm (5.4 in) over 19 rainy days, accompanied by considerable humidity at 80%. In contrast, December offers slightly cooler conditions with average temperatures of 26°C (80°F) and maximums reaching 29°C (85°F). The rainfall is significantly lower in December, totaling only 46 mm (1.8 in) over 16 days, while humidity rises slightly to 82%. For a detailed look at December's weather specifics, you can refer to Vieux Fort weather in December.
As summer transitions into fall, September in Vieux Fort reveals a unique climate character that sets it apart from other months. With average temperatures hovering around a warm 28°C (82°F), the days can be quite steamy, complemented by a high humidity level of 80%. This month is notable for its frequent rain, drenching the region on nearly two-thirds of the days, accumulating around 136 mm (5.4 in) of precipitation. The blend of warmth and moisture not only fosters lush landscapes but also signifies a shift towards the wetter season, making September distinctly different in both atmosphere and experience. For a deeper insight into Vieux Fort's climate patterns, be sure to check out Vieux Fort Climate.