Last updated: March 19, 2025
Experience the vibrant climate of Trincomalee, Sri Lanka in September, where temperatures reach a maximum of 36°C (96°F), averaging around 29°C (84°F), and dipping to a comfortable minimum of 25°C (77°F). This month brings about 73 mm (2.9 in) of rainfall over 12 days, contributing to an average humidity of 82%. Whether you’re soaking up the sun or enjoying the occasional tropical shower, September offers a dynamic weather experience perfect for exploring this coastal gem.
In September, Trincomalee experiences warm and inviting temperatures, marking a continuation of the tropical climate typical of this coastal gem. With nightly lows around 25°C (77°F), the days warm up to an average of 29°C (84°F), peaking at a striking 36°C (96°F). This month is illustrative of the prevailing heat trends as the region transitions from the mid-year peak, showcasing a slight increase in maximum temperatures compared to August. As the ocean breezes play a gentle role in the ambiance, visitors can enjoy sunlit days that are perfect for exploring the stunning beaches and vibrant marine life that define Trincomalee.
In September, Trincomalee experiences a notable increase in precipitation, with a total of 73 mm (2.9 in) reported over 12 days. This marks a transition into the wetter months, as rainfall begins to ramp up in anticipation of the intensifying north-east monsoon. While September's rainfall is relatively modest compared to the deluge awaiting in October and November, it serves as a precursor to a period where the average precipitation skyrockets, peaking at an impressive 359 mm (14.2 in) in November. This sequential rise illustrates how the dry season gives way to the lush, verdant landscapes characteristic of the region's monsoon phase, providing a captivating glimpse into the cyclic nature of Trincomalee's climate.
In September, Trincomalee experiences a humidity level of 82%, which is slightly lower than the preceding month’s peak of 85% in August. This subtle dip showcases a trend where humidity typically rises during the mid-year, peaking in late summer before beginning a gradual descent as autumn approaches. While September maintains a high humidity, consistent with the surrounding months, it signals a transitional period where the oppressive heat begins to ease. As the year progresses into October and November, humidity levels remain notably high, hovering around 83-84%, indicating that the closeness of the tropical climate lingers throughout the season.
September in Trincomalee, Sri Lanka, brings a notable UV Index of 14, categorizing sunlight exposure as extreme with a burn time of just 10 minutes. This trend of high UV levels continues throughout the year, peaking in March at 15, while the index consistently hovers around the extreme category from January to August. As the year progresses, September maintains relatively high UV exposure, indicating that while some slight fluctuations occur, sun safety remains crucial for residents and visitors alike. To stay informed about UV conditions, check the detailed forecast at Trincomalee UV Index.
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September in Trincomalee, Sri Lanka, offers a delightful blend of sunshine, with an average of 323 hours of bright rays illuminating the month. This marks a slight dip from the sunniest peak in March, which boasts 346 hours, yet still maintains a vibrant atmosphere perfect for beachgoers and adventurers alike. As the monsoon season approaches, the weather remains predominantly warm and dry, setting the stage for outdoor exploration before the clouds roll in during the latter months. The trend showcases a gradual decline in sunlight from the summer peak, yet September still enjoys more than ample sunshine compared to the relatively lesser hours in November. Overall, it’s an enchanting time to visit, where the warm embrace of the sun invites you to bask in the beauty of Trincomalee's coastal charm.
In September, Trincomalee, Sri Lanka, sees a notably low chance of sunny weather, with only an 18% likelihood of sunshine. This trend follows a summer characterized by a gradual decline in sunny days, peaking in April at 56% before plummeting into the rainy season. As the region transitions from the vibrant summer months of February and March, both boasting 44% sunshine chances, September's appearance often leans towards the cloudier spectrum, making it one of the less favorable months for sun-seekers. With only 8% of sunny days in August preceding it, September's weather hints at the tail end of a damp cycle, where sunshine becomes a rare treasure, paving the way for more overcast skies as the year progresses.
In September, Trincomalee, Sri Lanka, enjoys a consistent 12 hours of daylight, reflecting the trend established over the preceding months. The city typically basks in an abundance of light from March through September, maintaining this optimal duration which supports vibrant outdoor activities and scenic exploration. As the year transitions into October, daylight gradually diminishes, dipping back to 11 hours, a signal of the impending shorter days as the region approaches the end of the year. This pattern emphasizes Trincomalee's rich tropical climate, where sunshine remains a cherished companion for much of the year.
September in Trincomalee, Sri Lanka, welcomes a gentle breeze with an average wind speed of 5.2 m/s (12 mph), a slight drop from the summer months but still promising enough activity for wind enthusiasts. After the notable peaks in June and July at 5.8 m/s (13 mph), the transition into September signals the beginning of a gradual cooling, yet the wind remains invigorating and supports a vibrant atmosphere. With the winds picking up again towards the end of the year, September serves as a beautifully balanced month, hinting at the seasonal shifts that make this coastal paradise a unique destination year-round.
The weather in Trincomalee changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Trincomalee and find detailed weather information for every month.
In September, the weather is typically hot and humid, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 36°C (96°F). The month sees around 73 mm (2.9 in) of precipitation over 12 days, contributing to a high humidity level of 82%. In contrast, January offers milder conditions, with average temperatures between 21°C (70°F) and 29°C (84°F). While it still experiences some rainfall, January's precipitation is higher at 130 mm (5.1 in) over about 13 days, but humidity is slightly lower at 79%. For more detailed insights into January weather, you can visit Trincomalee weather in January.
When comparing the weather in September and February, September is generally warmer and more humid. The minimum temperature in September is 25°C (77°F), with an average high of 36°C (96°F), while February has a slightly cooler range, starting at 22°C (72°F) and peaking at 30°C (86°F). September also experiences higher precipitation, averaging 73 mm (2.9 in) over 12 days, compared to February's 56 mm (2.2 in) across the same number of days. Additionally, the humidity in September is notably higher at 82%, compared to 75% in February. For more details on February weather, you can visit Trincomalee weather in February.
In September, the weather tends to be hotter and more humid compared to March, with average temperatures reaching 29°C (84°F) and maximums soaring to 36°C (96°F). This month also experiences higher humidity at 82% and more precipitation, totaling 73 mm (2.9 in) over approximately 12 days. In contrast, March offers a slightly cooler climate, with average temperatures around 27°C (81°F) and a maximum of 32°C (91°F). Rainfall is less abundant in March, with only 49 mm (1.9 in) over about 11 days and lower humidity at 76%. For a detailed look at March weather, you can visit Trincomalee weather in March.
When comparing the weather in September and April, we see that both months share similar average temperatures, with a minimum of 25°C (77°F) and an average maximum of around 29°C (84°F). However, September tends to be warmer overall, reaching maximum temperatures of 36°C (96°F) compared to April’s 35°C (95°F). In terms of precipitation, September experiences a significantly higher amount, with 73 mm (2.9 in) over 12 days, while April sees only 38 mm (1.5 in) over 9 days. Additionally, humidity levels are notably higher in September at 82%, compared to April’s 72%. This makes September feel more sticky and humid than the relatively drier conditions of April. For more detailed weather information, you can visit Trincomalee weather in April.
In comparing the weather between September and May, both months experience similar temperature ranges, with minimums around 25°C (77°F), averages near 29°C (84°F), and maxima peaking at 36°C (96°F). However, September typically sees slightly higher humidity levels at 82%, compared to May's 75%. Precipitation is also a bit more pronounced in September, with 73 mm (2.9 in) of rainfall over 12 days, while May records 65 mm (2.6 in) under the same number of rainy days. For more detailed insights on May weather, you can visit Trincomalee weather in May.
In comparing the weather conditions of September and June, we find that September typically experiences slightly lower minimum and average temperatures, with a minimum of 25°C (77°F) and an average of 29°C (84°F), compared to June's minimum of 26°C (78°F) and an average of 30°C (86°F). While June remains drier with only 20 mm (0.8 in) of precipitation over just 3 days, September sees increased rainfall of 73 mm (2.9 in) over 12 days. Both months share high humidity levels of 82%, contributing to the tropical climate. For a more in-depth look at June weather patterns, you can check Trincomalee weather in June.
In comparing the weather between September and July, we observe that both months feature similar minimum temperatures, hovering around 25°C (77°F). However, September experiences slightly higher maximum temperatures, reaching up to 36°C (96°F), compared to July's maximum of 35°C (95°F). The average temperatures are also comparable, with September averaging 29°C (84°F) and July averaging 29°C (85°F).
Precipitation varies notably, as September receives 73 mm (2.9 in) over 12 days, which is significantly higher than July's 46 mm (1.8 in) across 8 days. Both months maintain high humidity levels, with September at 82% and July at 80%, indicating similarly muggy conditions. For more detailed information on July weather, check out Trincomalee weather in July.
In comparing September and August weather, we find that both months have a similar temperature range, with minimums at 25°C (77°F) and average highs around 29°C (84°F). However, September experiences slightly warmer maximum temperatures, reaching up to 36°C (96°F) compared to August's 34°C (94°F). Precipitation levels also differ, with September receiving 73 mm (2.9 in) over 12 days, while August has less rainfall at 48 mm (1.9 in) spread over 8 days. Additionally, humidity is marginally lower in September at 82%, compared to 85% in August. For more detailed information, check out Trincomalee weather in August.
In September, temperatures in Trincomalee are quite warm, with a minimum of 25°C (77°F), an average of 29°C (84°F), and a maximum reaching up to 36°C (96°F). The month sees a moderate level of precipitation, totaling 73 mm (2.9 in) over approximately 12 days, with humidity around 82%. In contrast, October experiences slightly cooler temperatures, with a minimum of 25°C (76°F) and an average of 28°C (82°F), but the maximum drops to 34°C (93°F). However, October is significantly wetter, with precipitation of 199 mm (7.8 in) occurring over about 20 days and an increase in humidity to 83%. For those interested in more details about October weather specifically, you can find additional information here: Trincomalee weather in October.
In comparing the weather conditions of September and November, we can observe some notable differences. September tends to be warmer, with average temperatures reaching 29°C (84°F) and maximums hitting 36°C (96°F). In contrast, November is cooler, with an average temperature of 27°C (80°F) and a maximum of 31°C (89°F). However, November is significantly wetter, experiencing a substantial increase in precipitation to 359 mm (14.2 in) over 25 days, compared to September's 73 mm (2.9 in) across 12 days. Additionally, both months exhibit high humidity levels, with November at 84% and September at 82%. For more detailed information on the weather patterns, you can refer to Trincomalee weather in November.
In September, the weather tends to be quite warm, with average temperatures around 29°C (84°F) and maximums reaching up to 36°C (96°F). This month experiences moderate rainfall, with 73 mm (2.9 in) of precipitation spread over 12 days and humidity levels at 82%. In contrast, December brings cooler temperatures with an average of 26°C (80°F) and maximums peaking at 30°C (85°F). However, it is significantly wetter, with 268 mm (10.5 in) of rain over 21 days, while humidity remains similar at 83%. For a more detailed look at December weather, you can visit Trincomalee weather in December.
In September, Trincomalee experiences a shift in weather patterns, with warm temperatures averaging around 29°C and peaking at a sizzling 36°C. While the heat remains inviting, the month is marked by increased humidity and precipitation, with about 73 mm of rain falling over 12 days. This combination of warmth and moisture offers a transition from the drier months, creating a lush landscape. For a comprehensive look at how September fits into the broader weather trends, visit Trincomalee Climate.