Last updated: March 19, 2025
September in Jaffna, Sri Lanka offers a warm and humid climate, with temperatures ranging from a comfortable 25°C (78°F) at night to a peak of 31°C (88°F) during the day. The average temperature settles around 28°C (83°F), creating a tropical atmosphere perfect for exploring the region. This month experiences significant rainfall, with about 100 mm (3.9 in) of precipitation spread over 17 days, contributing to the lush greenery of the landscape. With humidity levels soaring at 86%, visitors should prepare for a damp, yet invigorating experience amidst Jaffna's rich culture and history.
In September, Jaffna, Sri Lanka enjoys a pleasant transition into the fall season, characterized by mild and stable temperatures. With a minimum of 25°C (78°F) and an average of 28°C (83°F), the days remain comfortably warm, perfect for both exploration and relaxation. The high peaks at 31°C (88°F) signify the lingering warmth of summer, while evenings cool down slightly, inviting a sense of tranquility. Throughout the year, Jaffna maintains a tropical vibe, but September notably balances warmth with a slight dip, making it an ideal time to experience the region's vibrant culture and scenic beauty.
In September, Jaffna, Sri Lanka experiences a significant increase in precipitation, with rainfall measuring 100 mm (3.9 in), marking one of the wetter months of the year. This uptick is accompanied by 17 rainy days, illustrating a shift towards more consistent rainfall as the region approaches the peak of its annual monsoon season. Following the drier months earlier in the year, September sets the stage for even heavier rains in October and November, where totals soar to 220 mm (8.7 in) and 396 mm (15.6 in) respectively. This trend underscores Jaffna's transition from relative dryness to a phase of increased precipitation, crucial for replenishing water sources but also indicative of the region's climactic upheaval.
In September, Jaffna, Sri Lanka, experiences a notable humidity level of 86%, a slight dip from the peak of 87% reached in August. This month marks the tail end of the intensifying humid season, which begins in June and continues its upward trajectory through August. Although humidity remains high, the consistent levels observed from September through November suggest a stabilizing trend as the region transitions into drier months. Overall, September's humidity reflects the lingering effects of the monsoon season, providing a warm, humid atmosphere typical of this coastal locale.
In September, Jaffna, Sri Lanka, experiences a notable UV Index of 14, categorized as extreme, indicating that sun exposure can lead to skin burns in as little as 10 minutes. This peak in the UV Index is consistent with the region's trend of high values throughout the year, particularly from January to April, where figures reach as high as 15. While September's UV levels are slightly lower than in April, they remain elevated and serve as a reminder of the intense sun prevalent in this part of the world. As one seeks to enjoy the tropical climate, it’s essential to stay informed about sun safety. For more detailed insights on UV levels in Jaffna, check out Jaffna UV Index.
UV Risk Categories
September brings a gentle transition in Jaffna, Sri Lanka, with 323 hours of sunshine, a slight dip from the vibrant summer months preceding it. Following an impressive peak in March at 346 hours, the sunshine gradually softens as the year progresses, yet September still basks in a wealth of daylight, making it a delightful time for outdoor exploration. The consistent sunshine throughout the previous months creates a warm, welcoming atmosphere, positioning Jaffna as an idyllic destination for those seeking the lingering warmth of summer before the cooler months arrive. As the sunlight begins to wane, the vibrant colors of Jaffna's landscapes become even more pronounced, enriching your experience in this tropical paradise.
In Jaffna, Sri Lanka, September presents a modest likelihood of sunny weather, with only a 22% chance of sunshine. This mark is part of a notable trend: as the dry months of January through April showcase significantly higher probabilities of sunlight—ranging from 27% in January to a peak of 61% in April—the summer months transition into a period of increased cloud cover and rainfall. Following the typically lush but overcast August, which offers a mere 10% chance of sunshine, September further dips into lower odds, hinting at a lingering monsoon influence. As the year progresses towards October and November, the sunshine chances remain relatively low, reinforcing September’s position as a bridge between the vibrant sunlit days of early year and the grayer, wetter months to come.
In September, Jaffna, Sri Lanka enjoys a consistent 12 hours of daylight, a continuation of the extended light experienced during the preceding months from March through August. This period signifies a stable and inviting climate, ideal for outdoor activities and exploration. As the year transitions into October, daylight begins to recede to 11 hours, indicating an approaching shift towards shorter days. Overall, September encapsulates the heart of Jaffna's lively daylight season, allowing for ample opportunity to bask in the vibrant atmosphere that characterizes this coastal city.
As September rolls in Jaffna, Sri Lanka, the average wind speed settles at a gentle 6.4 m/s (14 mph), reflecting a slight dip from the breezier August. This month typically embodies a transition, where the vibrant winds of summer gradually start to wane. Notably, from May through August, the winds consistently sail above 6 m/s, peaking in June at 7.3 m/s (16 mph). The gradual reduction in wind speed post-summer signals a shift toward the calmer months ahead, with October's forecast predicting a further decline to 5.3 m/s (12 mph). This pattern illustrates the dynamic climatic rhythm of Jaffna, where each season not only brings its own unique charm but also showcases a compelling tale of changing winds.
The weather in Jaffna 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 Jaffna and find detailed weather information for every month.
September and January present distinct weather patterns, with September being slightly warmer and more humid. In September, temperatures range from a minimum of 25°C (78°F) to a maximum of 31°C (88°F), with an average of 28°C (83°F). The month experiences considerable rainfall, totaling 100 mm (3.9 in) over approximately 17 days, and the humidity is quite high at 86%. In contrast, January offers cooler temperatures, with a minimum of 24°C (75°F) and a maximum of 29°C (84°F), averaging 26°C (79°F). The precipitation in January is somewhat lower at 96 mm (3.8 in) spread over just 8 days, and humidity decreases to 76%. For a more detailed overview, visit Jaffna weather in January.
September weather is notably warmer and more humid compared to February, with average temperatures around 28°C (83°F) and humidity levels reaching 86%. During this month, Jaffna experiences considerable rainfall, totaling 100 mm (3.9 inches) over 17 days. In contrast, February presents a slightly cooler climate, with average temperatures of 26°C (80°F) and significantly less precipitation at just 17 mm (0.7 inches) over 4 days, resulting in a more comfortable humidity level of 69%. For more detailed information, you can check out Jaffna weather in February.
In both September and March, temperatures remain quite consistent, with minimums around 25°C (77°F-78°F), average highs reaching 28°C (82°F-83°F), and maximums peaking at 31°C (87°F-88°F). However, the contrast in precipitation is stark; September experiences significantly higher rainfall with about 100 mm (3.9 in) over 17 days, while March enjoys a much drier climate with only 18 mm (0.7 in) across just 5 days. Additionally, humidity levels are notably higher in September at 86%, compared to March's more comfortable 69%. For a deeper look into March weather specifics, visit Jaffna weather in March.
When comparing the weather in September and April, we notice some distinct differences. September typically experiences slightly cooler temperatures, with averages around 28°C (83°F), while April features a bit warmer climate, averaging 29°C (85°F). The maximum temperatures in both months are similar, peaking at 31°C (88°F) for September and 32°C (89°F) for April. However, September brings significantly more precipitation, with about 100 mm (3.9 in) over 17 days, compared to just 29 mm (1.2 in) over 6 days in April. Additionally, the humidity in September is notably higher at 86%, while April has a more comfortable level of 69%. For more details, you can check Jaffna weather in April.
Comparing the weather in September and May reveals some interesting differences. In September, temperatures range from a minimum of 25°C (78°F) to a maximum of 31°C (88°F), with an average temperature of 28°C (83°F). This month sees significant rainfall, totaling 100 mm (3.9 in) over 17 days, and the humidity is quite high at 86%. In contrast, May experiences slightly higher temperatures, with a minimum of 27°C (80°F), an average of 29°C (85°F), and a maximum of 32°C (90°F). The precipitation in May is considerably less, at 56 mm (2.2 in) spread across 13 days, and the humidity is lower at 76%. For a more detailed look at the weather conditions, you can check out Jaffna weather in May.
In comparing the weather between September and June, we can observe some notable differences. September experiences slightly lower average temperatures, ranging from a minimum of 25°C (78°F) to a maximum of 31°C (88°F), while June has a minimum of 26°C (80°F) and a similar maximum. However, June typically has less precipitation, with only 32 mm (1.3 in) over 7 days, compared to September’s much wetter conditions of 100 mm (3.9 in) over 17 days. Additionally, humidity is a bit higher in September at 86%, compared to June’s 82%. For more detailed insights, you can check out Jaffna weather in June.
In comparing the weather of September to that of July, we observe that both months experience similar maximum temperatures, averaging around 31°C (88°F). However, September tends to be slightly cooler with a minimum temperature of 25°C (78°F), compared to July's 26°C (79°F). One notable difference is in precipitation; September sees a considerable increase with 100 mm (3.9 in) over 17 days, while July has only 62 mm (2.4 in) across 13 days. Additionally, humidity levels are a bit higher in September at 86%, compared to 83% in July. For further specifics on July weather, please refer to Jaffna weather in July.
In comparing the weather of September and August, both months experience warm temperatures, with September seeing a minimum of 25°C (78°F) and an average of 28°C (83°F), similar to August's minimum of 26°C (79°F) and average of 28°C (84°F). While the maximum temperatures remain consistent at 31°C (88°F) for both months, September is notably wetter, recording 100 mm (3.9 in) of precipitation over 17 days compared to August's 65 mm (2.5 in) over 13 days. Humidity levels are also quite high, with September slightly higher at 86% compared to August's 87%. To learn more about August's weather specifics, you can visit Jaffna weather in August.
In September, the weather in Jaffna features a warm climate with average temperatures around 28°C (83°F) and maximum highs reaching 31°C (88°F). The month experiences significant rainfall, accumulating to 100 mm (3.9 in) over 17 days, with a consistent humidity level of 86%.
In contrast, October brings slightly cooler average temperatures at 28°C (82°F) and maximums of 30°C (86°F). However, it is notably wetter, with total precipitation jumping to 220 mm (8.7 in) across 23 days, while maintaining the same humidity level of 86%. This transition marks October as a month with increased rainfall, making it a crucial consideration for outdoor activities. For more details, you can check out Jaffna weather in October.
In September, the weather in Jaffna is characterized by warmer temperatures, with a minimum of 25°C (78°F) and an average of 28°C (83°F), reaching a high of 31°C (88°F). Rainfall during this month totals about 100 mm (3.9 in) over 17 days, while humidity remains consistently high at 86%. In contrast, November sees slightly cooler temperatures, with a minimum of 25°C (77°F) and an average of 27°C (81°F), peaking at 29°C (85°F). However, this month experiences a significant increase in precipitation, accumulating 396 mm (15.6 in) over 24 days, while humidity remains unchanged at 86%. For a detailed outlook on November's weather, check Jaffna weather in November.
In September, the weather tends to be warm and humid, with average temperatures ranging from a minimum of 25°C (78°F) to a maximum of 31°C (88°F). The month experiences significant rainfall, totaling around 100 mm (3.9 in) over 17 days. In contrast, December sees slightly cooler temperatures, with an average ranging from 24°C (76°F) to 29°C (84°F), but it is much wetter, delivering 254 mm (10.0 in) of rain across 18 days. Humidity remains relatively high in both months, at 86% in September and 85% in December. For more specifics on the December climate, you can check out Jaffna weather in December.
As September rolls into Jaffna, the weather takes on a distinct character, marked by higher humidity and increased rainfall compared to the drier summer months. Temperatures remain warm, hovering around a pleasant average of 28°C, but the frequent showers—spanning over 17 days—bring a refreshing change to the landscape. This month serves as a transition into the lush greenery that follows, making it a unique time to experience the vibrant culture intertwined with nature's reawakening. For more detailed insights into what to expect throughout the year, visit Jaffna Climate.