Last updated: August 31, 2025
Experience the enchanting weather of Trindade, São Tomé and Príncipe in September, where temperatures remain pleasantly warm, peaking at a delightful 26°C (80°F) and averaging around 25°C (77°F). With minimums of 24°C (75°F), the climate provides a comfortable escape. While September witnesses 53 mm (2.1 in) of rainfall spread over 9 days, the lush surroundings thrive under the characteristic 86% humidity, creating a vibrant, tropical ambience. Whether you're exploring the island's stunning landscapes or relaxing by the coast, September offers an inviting atmosphere rich in natural beauty and cultural experiences.
In September, Trindade, São Tomé and Príncipe, experiences a subtle yet delightful transition as temperatures remain comfortably warm. The month typically showcases a minimum of 24°C (75°F), while average temperatures hover around 25°C (77°F), and peak at about 26°C (80°F). This slight increase from the cooler months of July and August signals a gradual return to the warmer climate characteristic of the island. Overall, September offers a pleasant blend of warmth and refreshing breezes, ideal for enjoying the lush natural beauty and vibrant culture of this enchanting destination.
In September, Trindade, São Tomé and Príncipe, experiences a notable uptick in precipitation, with 53 mm (2.1 in) of rain falling over 9 days. This slight increase follows a dry spell in the preceding months, highlighting a shift towards wetter conditions as the island transitions into its rainy season. While September's rainfall is modest compared to the heavier downpours of October and November, it serves as a precursor to the significant precipitation to come, indicating that nature is gearing up for the lush abundance that characterizes the later months. As the island prepares for this seasonal transformation, the increase in rainy days builds anticipation for the vibrant landscapes and rejuvenated ecosystems typical of the upcoming wet season.
In September, Trindade, São Tomé and Príncipe experiences a notable increase in humidity, reaching 86%, the highest level recorded for the year. This surge follows the prior months, where humidity gradually escalated from a moderate 75% in May to a more substantial 83% in August. The upward trend in humidity during the latter part of the year signals the onset of more tropical conditions, making September feel particularly sultry. As the year progresses, humidity levels remain high, generally fluctuating between the mid-70s and low-80s, with a slight dip in October to 85% before stabilizing. Overall, September serves as a clear indicator of the region's move into a more humid and lush atmosphere as it transitions deeper into the rainy season.
In September, Trindade experiences an UV Index of 13, categorizing it as extreme and necessitating vigilant sun protection, with a burn time of just 10 minutes. This month continues the trend of elevated UV levels seen throughout the year, particularly from January to April, where indices reach a peak of 14. After a slight dip during the summer months of June and July, the UV Index climbs back to extreme levels, consistent with the latter half of the year. As you bask in the tropical sun, remember to stay protected and informed; you can find more details about the UV Index in Trindade here.
UV Risk Categories
As September rolls in, Trindade, Sao Tome and Principe basks in an impressive 295 hours of sunshine, marking it as one of the sunniest months of the year. This robust increase reflects a delightful upward trend, following a steady rise from August's 291 hours. The radiant weather not only brightens the landscape but also enhances the town's vibrant atmosphere, inviting both locals and travelers to indulge in outdoor adventures. With the sun shining brightly throughout the month, September emerges as a golden opportunity to soak up the warm rays, celebrating the peak of sunshine before the year transitions into a slightly cloudier October.
September in Trindade, São Tomé and Príncipe offers a moderate, yet promising chance of sunshine at 22%, placing it slightly below the summer peak seen in July (33%) and August (27%). As the dry season transitions into the lush greenery of autumn, the likelihood of clear skies takes a gentle dip from the energetic sun-soaked months, but still presents opportunities for lovely, sunlit days. With a consistent pattern throughout the year, travelers can expect September to be a balance of changeable weather, where the warmth of the sun can still make a delightful appearance amidst occasional cloud cover.
In Trindade, Sao Tome and Principe, September experiences a consistent 12 hours of daylight, just like every other month of the year. This remarkable stability in day length reflects the region’s tropical climate, where the sun rises and sets with minimal variation. As the seasons shift, locals and visitors alike can enjoy a balanced rhythm of day and night, making September an inviting time for outdoor activities and exploration. With such dependable daylight, the island’s vibrant landscapes and rich cultural heritage are always waiting to be discovered, no matter the time of year.
As September arrives in Trindade, São Tomé and Príncipe, the wind continues to blow with an invigorating vigor, averaging 5.4 m/s (12 mph)—a speed that mirrors the lively breezes of the preceding months of July and August. This period showcases a noticeable peak in wind activity, particularly from June through September, where average speeds seem to flirt with the 5.0 m/s mark and beyond. Following the mid-year gusts, a gentle decline settles in, hinting at a shift as the year progresses. With these prevailing winds, September maintains a refreshing atmosphere, inviting both adventure and relaxation amid the picturesque island scenery.
Weather in Trindade varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Trindade, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures are generally mild with a minimum of 24°C (75°F), averaging around 25°C (77°F), and peaking at 26°C (80°F). This month sees about 53 mm (2.1 in) of precipitation over 9 days, accompanied by high humidity at 86%. In contrast, January presents slightly warmer conditions, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 28°C (83°F), averaging 27°C (80°F). However, it's also significantly wetter, receiving 129 mm (5.1 in) of rainfall over 21 days, and the humidity is lower at 75%. For a detailed look at weather conditions, check out Trindade weather in January.
In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 26°C (80°F), with an average of 25°C (77°F). The month experiences about 53 mm (2.1 in) of precipitation over 9 days, accompanied by high humidity levels at 86%. In contrast, February is slightly warmer, with temperatures ranging from 25°C (76°F) to 29°C (84°F) and an average of 27°C (81°F). However, it is also wetter, with around 130 mm (5.1 in) of rainfall over 19 days, though the humidity is lower at 75%. For more details on February's weather, you can check this link: Trindade weather in February.
September and March weather present notable differences in temperature and precipitation. In September, the temperatures range from a minimum of 24°C (75°F) to a maximum of 26°C (80°F), with an average of 25°C (77°F). The month sees 53 mm (2.1 in) of rainfall across about 9 days and high humidity levels at 86%. In contrast, March experiences slightly warmer temperatures, with a minimum of 25°C (77°F) and a maximum reaching 29°C (85°F), averaging 27°C (81°F). However, it is also much wetter, with 148 mm (5.8 in) of precipitation spread over 20 days and lower humidity at 73%. For more detailed insights into the weather during March, you can visit Trindade weather in March.
In comparing the weather of September and April, September features slightly cooler temperatures, with a minimum of 24°C (75°F) and an average of 25°C (77°F), while April is warmer with a minimum of 25°C (77°F) and an average of 27°C (81°F). April also tends to be wetter, receiving 158 mm (6.2 in) of precipitation over 17 days, in contrast to September's 53 mm (2.1 in) over just 9 days. Additionally, the humidity in September is notably higher at 86%, whereas April's humidity is more moderate at 74%. For more detailed information about April weather, you can visit Trindade weather in April.
September and May present contrasting weather patterns. In September, temperatures are slightly milder, with averages around 25°C (77°F) and maximums reaching 26°C (80°F), accompanied by high humidity levels of 86%. Precipitation is moderate, with about 53 mm (2.1 in) falling over 9 days. In contrast, May experiences warmer temperatures, with an average of 27°C (80°F) and maximums climbing to 29°C (84°F). However, it is also wetter, receiving a significant 154 mm (6.1 in) of rainfall over 20 days and lower humidity at 75%. For more detailed insights, you can check Trindade weather in May.
In comparing the weather of September and June, we can see that both months exhibit similar average temperatures, with June having a minimum of 23°C (74°F) and September a slightly warmer minimum of 24°C (75°F). The average temperatures are quite close, with June averaging 25°C (78°F) and September at 25°C (77°F). However, September tends to be slightly cooler at maximum temperatures, peaking at 26°C (80°F), compared to June's 27°C (81°F). Precipitation is more frequent in September, occurring on 9 days with a total of 53 mm (2.1 in), while June experiences just 39 mm (1.5 in) over 7 days. Notably, September has higher humidity levels at 86%, as opposed to June's 76%. For more details on June conditions, check Trindade weather in June.
When comparing the weather in September and July, both months showcase similar maximum temperatures peaking at 26°C (80°F). However, September tends to be slightly warmer on average with a temperature of 25°C (77°F), compared to July's average of 24°C (76°F). Notably, September experiences significantly more precipitation, with 53 mm (2.1 in) over 9 days, while July only sees 17 mm (0.7 in) spread over 3 days. Additionally, September has higher humidity at 86%, contrasted with July's lower humidity of 76%. For more detailed insights, you can explore Trindade weather in July.
In comparing the weather between August and September, we observe that September experiences slightly higher temperatures, with averages reaching 25°C (77°F) compared to August's 24°C (76°F). Both months see a maximum of 26°C (79°F), but September's minimum temperature is a bit warmer at 24°C (75°F). Additionally, September brings more precipitation, totaling 53 mm (2.1 in) over 9 days, whereas August records a milder 26 mm (1.0 in) over just 6 days. Humidity is also a bit higher in September at 86%, compared to 83% in August. For more detailed information on the weather conditions in August, visit Trindade weather in August.
In September, the weather remains warm, with temperatures averaging around 25°C (77°F) and experiencing minimal fluctuation between a low of 24°C (75°F) and a high of 26°C (80°F). The month sees about 53 mm (2.1 in) of precipitation, occurring over 9 days, and an average humidity of 86%. Conversely, October is slightly warmer, with an average temperature of 26°C (79°F) and a maximum of 27°C (81°F), but it also brings significantly more rainfall, totaling 171 mm (6.7 in) over 25 days. Interestingly, the humidity remains fairly consistent at 85%. For more detailed insights, you can visit Trindade weather in October.
September and November both feature warm temperatures, with September showing a minimum of 24°C (75°F) and an average of 25°C (77°F), while November slightly increases with a minimum of 24°C (76°F) and an average of 26°C (79°F). However, November experiences significantly heightened rainfall, with a striking 229 mm (9.0 in) over 27 days compared to September's 53 mm (2.1 in) across 9 days. Humidity levels remain relatively high in both months, but November is slightly drier at 81% compared to September's 86%. For a more detailed look at the weather specifics for November, you can refer to Trindade weather in November.
In September, the weather is relatively mild with average temperatures ranging from 24°C to 26°C (75°F to 80°F) and a total precipitation of 53 mm (2.1 in) over 9 rainy days, accompanied by high humidity levels at 86%. By December, the temperatures slightly rise to a minimum of 25°C and a maximum of 28°C (76°F to 82°F), but the rainfall significantly increases to 257 mm (10.1 in) spread over 28 days. This uptick in precipitation results in a lower humidity level of 76%, making the air feel more comfortable despite the increased rainfall. For more details on the December climate, check out Trindade weather in December.
In September, Trindade experiences a transition into the heart of its wet season, with increased humidity and notable rainfall that sets it apart from the preceding months. The pleasant temperatures hover around a comfortable average, making outdoor activities enjoyable despite the occasional showers. With about nine days of precipitation throughout the month, it's a time when the lush greenery of the landscape truly flourishes. For a deeper understanding of how September fits into the overall climate picture, visit Trindade Climate.