Last updated: August 31, 2025
In September, Port of Spain, Trinidad and Tobago, experiences a warm and humid climate, with maximum temperatures reaching 30°C (87°F) and an average of 27°C (81°F). The month is characterized by significant precipitation, totaling 115 mm (4.5 in) across 21 rainy days, contributing to the region's lush landscapes. With humidity levels hovering around 79%, visitors should be prepared for a sticky atmosphere that defines this vibrant coastal city during the late rainy season.
In September, Port of Spain, Trinidad and Tobago, experiences a delightful continuation of warm tropical weather, with average temperatures hovering around 27°C (81°F). The month starts with a minimum temperature of 25°C (78°F) and peaks at a comfortable 30°C (87°F), heralding the final days of summer. As the region transitions into the fall season, the temperatures remain consistent with those of August, showcasing an overall trend of warmth that characterizes this vibrant city. Although the slight increase in maximum temperatures suggests a lingering summer heat, the atmosphere is often softened by gentle breezes, making it a pleasant time for outdoor exploration and beachfront relaxation.
September marks a pivotal transition in Port of Spain's rainfall patterns, showcasing a precipitation total of 115 mm (4.5 in) over 21 days. This significant volume reflects the tail end of the wet season, where rain remains abundant but starts to lessen compared to the torrential downpours of July and August, which recorded 148 mm (5.8 in) and 145 mm (5.7 in) respectively. Interestingly, while rainfall decreases slightly, September still maintains a notable number of rainy days, underscoring the consistent moisture that characterizes this tropical climate. As the month progresses, one might feel the gradual shift towards drier conditions, preparing the landscape for the drier months ahead, but not before September leaves its distinct mark with its lush, verdant scenes nourished by the rain.
September in Port of Spain, Trinidad and Tobago, sees a slight increase in humidity, averaging 79%. This marks a small rise from the previous month of August, which recorded 80% humidity, hinting at a pattern of elevated moisture levels as the year progresses. The humidity levels are relatively consistent in the latter months of the year, featuring in the 78%-81% range from September through November. Notably, this time of year typically experiences higher humidity, complemented by the region's tropical climate, making September a warm and humid month for locals and visitors alike. As the year winds down, the humidity stabilizes around the 79% mark, suggesting a transitional period leading into the wetter months ahead.
In September, the UV Index in Port of Spain peaks at 14, maintaining the extreme exposure category established throughout the earlier months of the year. This consistent reading reflects a trend of heightened sun intensity experienced from March through October, with minimal fluctuations during July and August. Notably, the burn time remains a brief 10 minutes, emphasizing the need for sun protection even for short outdoor activities. As the year transitions into October, the UV levels do not relent, staying at 14, which reinforces the importance of vigilance against UV exposure. For more detailed information, check out the Port of Spain UV Index.
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As September unfolds in Port of Spain, Trinidad and Tobago, the city basks in an impressive 322 hours of sunshine, maintaining a consistent glow in the latter part of the year. The month shines brightly, albeit slightly less than the sun-kissed summer months, with August leading the way at 342 hours. Following a gradual increase from the beginning of the year, where January offers a modest 269 hours, the trend peaks in the spring with March reaching 342 hours before settling into the warm embrace of autumn. September's sunshine, while slightly reduced, still reflects the vibrant atmosphere of the region, hinting at the perfect balance between warmth and the upcoming cooler months. The slight decline from the peak summer months suggests a transition, yet the sunny days remain plentiful, inviting both locals and visitors to enjoy the beauty of this Caribbean gem.
September in Port of Spain, Trinidad and Tobago, brings a promising chance of sunny weather, with the likelihood of sunshine reaching 51%. This marks an increase from the summer months, where the sun only appeared around 28% to 43% of the time. Following a relatively cloudy July and August, September’s weather offers a refreshing shift, indicating that the Caribbean sun is beginning to reclaim its dominance as summer wanes. As the year progresses into October, the chance of sunny days dips again to 39%, making September a prime month for enjoying the radiant outdoors before the cloud cover returns.
In September, the Port of Spain, Trinidad and Tobago, enjoys a consistent 12 hours of daylight, which aligns with the sunny months of mid-year. This trend reflects a stable pattern from March through September, where daylight durations hit a peak, inviting outdoor activities and vibrant social gatherings. As the year progresses into October, daylight begins to wane, dipping to 11 hours—a gentle reminder of the approaching end of the longer days. Overall, the daylight chart for Port of Spain showcases a warm, tropical rhythm, where residents and visitors alike embrace the sun-kissed hours before transitioning into shorter days.
In September, Port of Spain experiences a notable dip in wind speeds, averaging just 4.6 m/s (10 mph), the lowest of the year. Following a summer of breezier conditions, where winds hovered around 4.9 m/s (11 mph) in August, September ushers in a notable calm. This gentle shift marks a transition as the region prepares for October’s increase to 6.0 m/s (13 mph). The seasonal patterns reveal a consistent ebb and flow, with winter months like December often returning to more vigorous gusts around 7.2 m/s (16 mph). As the year progresses, the winds tend to shift from their summer slumber to robust robustness, encapsulating the dynamic nature of Trinidad and Tobago's climate.
Weather in Port of Spain varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port of Spain, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinct weather profiles in terms of temperature and precipitation. In September, temperatures range from a minimum of 25°C (78°F) to a maximum of 30°C (87°F), with an average of 27°C (81°F). This month also sees significant rainfall, totaling 115 mm (4.5 in) over 21 days and a humidity level of 79%. In contrast, January experiences slightly cooler temperatures, with a minimum of 23°C (74°F) and a maximum of 27°C (81°F), yielding an average of 26°C (78°F). Rainfall is considerably lower in January, at 48 mm (1.9 in) across just 13 days, accompanied by a similar humidity level of 78%. For a more detailed look at January weather, visit Port of Spain weather in January.
September and February showcase distinct weather patterns in terms of temperature and precipitation. September tends to be warmer, with minimum temperatures around 25°C (78°F) and an average of 27°C (81°F), peaking at 30°C (87°F). The month also experiences significant rainfall, totaling 115 mm (4.5 in) over 21 days, along with a humidity level of 79%. In contrast, February is slightly cooler, with temperatures ranging from a minimum of 23°C (74°F) to an average of 25°C (78°F), and a maximum of 27°C (81°F). Precipitation is much lower in February, measuring 34 mm (1.4 in) across 13 days, and humidity sits at a slightly lower 77%. For more details on February's climate, you can check Port of Spain weather in February.
When comparing the weather in September and March, September tends to be warmer and wetter. In September, the temperatures range from a minimum of 25°C (78°F) to a maximum of 30°C (87°F), with an average of 27°C (81°F). This month also sees significant precipitation, accumulating 115 mm (4.5 in) over 21 days and maintaining a humidity level of 79%. In contrast, March offers milder conditions, with temperatures spanning from a minimum of 24°C (75°F) to a maximum of 28°C (82°F) and an average of 26°C (78°F). Precipitation is much lower in March, totaling only 32 mm (1.2 in) over 9 days, and humidity is slightly less at 76%. For more specific details about March weather, you can explore the following link: Port of Spain weather in March.
In September, the weather tends to be warmer and more humid compared to April, with average temperatures hovering around 27°C (81°F) and maximums reaching up to 30°C (87°F). The month also sees significantly more rainfall, with a total of 115 mm (4.5 in) over 21 days, leading to a humidity level of 79%. In contrast, April has milder conditions, with average temperatures of 26°C (79°F) and a maximum of 28°C (83°F), along with much less precipitation, totaling only 18 mm (0.7 in) over just 5 days. The humidity in April is slightly lower at 75%, making it a more comfortable month overall. For more detailed insights, you can check out Port of Spain weather in April.
In September, the weather tends to be slightly warmer and more humid than in May, with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F). The month sees more rainfall, averaging 115 mm (4.5 in) over 21 days, contributing to a higher humidity level of 79%. In contrast, May enjoys a milder climate, with average temperatures from a minimum of 24°C (76°F) to a maximum of 29°C (84°F), and significantly less precipitation at 54 mm (2.1 in) over 11 days, resulting in a humidity level of 76%. For more details, you can check out the Port of Spain weather in May.
In comparing the weather of September and June, we see some notable similarities and differences. Both months feature a warm temperature range, with minimums around 25°C (78°F), but September tends to be slightly warmer overall, averaging 27°C (81°F) compared to June’s 26°C (80°F). Precipitation levels are fairly close, with September receiving 115 mm (4.5 in) over 21 days, while June sees a bit more rain at 119 mm (4.7 in) over 20 days. Humidity levels are also comparable, with September at 79% and June at 80%. For more detailed information on June weather, you can check Port of Spain weather in June.
In comparing the weather of September and July, September tends to be slightly warmer with average temperatures reaching 27°C (81°F) and a maximum of 30°C (87°F), compared to July’s average of 26°C (80°F) and maximum of 29°C (84°F). However, September experiences more precipitation, totaling 115 mm (4.5 in) across 21 days, whereas July has a higher precipitation amount of 148 mm (5.8 in) spread over 28 days. Humidity levels are also comparable, with September at 79% and July slightly higher at 83%. For more detailed information, you can check Port of Spain weather in July.
In comparing the weather of September and August, both months exhibit similar temperature ranges, with minimums at 25°C (78°F), averages around 27°C (81°F), and maximums peaking at 30°C (87°F) in September and 30°C (86°F) in August. However, September tends to be slightly less rainy, receiving 115 mm (4.5 in) of precipitation over 21 days, compared to August's 145 mm (5.7 in) across 26 days. Humidity remains relatively constant, with September at 79% and August at 80%. For more details, you can visit Port of Spain weather in August.
In September, the weather typically features a warm and humid atmosphere with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F) and an average of 27°C (81°F). The month sees moderate rainfall, with 115 mm (4.5 inches) recorded over approximately 21 days. By contrast, October maintains similar temperatures, with a minimum of 25°C (77°F), an average of 27°C (81°F), and a maximum of 30°C (86°F). However, October experiences increased precipitation, totaling 145 mm (5.7 inches) across 24 days, while humidity remains constant at 79%. For more detailed insights, check out the Port of Spain weather in October.
In comparing the weather between September and November, both months exhibit similar warm temperatures, with minimums around 25°C (77-78°F) and averages hovering around 27°C (80-81°F). However, November tends to be slightly cooler, with a maximum temperature of 29°C (84°F) compared to September's 30°C (87°F). Precipitation levels are also comparable, with September receiving 115 mm (4.5 in) over 21 days while November sees 106 mm (4.2 in) spread over 23 days, and humidity is marginally higher in November at 81% versus September's 79%. For a detailed look at the weather specifics, you can check out Port of Spain weather in November.
In comparing the weather of September and December, September tends to be slightly warmer with average temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F). In contrast, December features a milder average temperature, with a range from 24°C (75°F) to a maximum of 28°C (83°F). Both months experience similar levels of humidity, hovering around 79% in September and 80% in December. Precipitation levels are also close, with September receiving 115 mm (4.5 in) over 21 days, while December sees a little less rainfall at 99 mm (3.9 in) over the same number of days. For a more detailed look at December's weather, you can visit Port of Spain weather in December.
September in Port of Spain presents a unique blend of warmth and humidity, with temperatures averaging around 27°C (81°F). Compared to other months, this period is characterized by increased precipitation, with significant rainfall and roughly 21 days of wet weather, making it one of the rainiest times of the year. The higher humidity levels at 79% further enhance the tropical feel, creating a contrast to the drier months that precede and follow it. For those planning a visit, it's essential to be prepared for occasional downpours, as they are a hallmark of September’s climate. To learn more about the yearly weather patterns, check out Port of Spain Climate.