Last updated: March 19, 2025
September in Kalutara, Sri Lanka is characterized by a warm and humid climate, with average temperatures hovering around 27°C (80°F). Daytime highs can reach up to 30°C (86°F), while evenings offer a slight respite with lows of 24°C (75°F). This month is notably wet, with a significant precipitation amount of 277 mm (10.9 in) spread across 27 rainy days. Humidity levels remain high at 82%, creating a tropical atmosphere that is both lush and vibrant. Visitors should be prepared for frequent showers and a rich, green landscape that defines Kalutara's appeal during this season.
In September, Kalutara, Sri Lanka, enjoys a delightful tropical climate, with temperatures showcasing a gentle consistency. The minimum temperature sits comfortably at 24°C (75°F), perfect for those early morning strolls. The average temperature remains steady at 27°C (80°F), ensuring warmth without being overwhelming, while the maximum reaches 30°C (86°F), ideal for beach enthusiasts and sun seekers alike. As summer transitions to fall, September maintains the trend of warm temperatures that characterizes the months leading up to it, making it an inviting time to explore this idyllic coastal town.
In September, Kalutara, Sri Lanka, experiences a significant amount of rainfall, with 277 mm (10.9 inches) recorded over 27 days. This marks a continuation of the monsoon season, where precipitation peaks, following a notably wet August. The consistent downpours from May through September illustrate a trend of intense moisture, culminating in this month known for its lush greenery. Compared to the previous months, September maintains a high frequency of rain, contributing to the island's vibrant ecosystems. As the monsoon transitions into October, Kalutara typically continues to receive substantial rainfall, preparing the landscape for the impending wetter months ahead.
In September, Kalutara, Sri Lanka, experiences a humidity level of 82%, which is slightly lower than the preceding months of August and July, both of which boast a peak humidity of 83% and 82%, respectively. This month marks the start of a gradual descent in moisture levels, continuing the trend seen from October onwards, where humidity dips to 81%. Overall, the humidity in Kalutara remains notably high throughout the year, hovering above 70% for most months, with notable peaks during the mid-year monsoon season. Thus, September retains that characteristic tropical stickiness, making it a quintessential representation of the region’s humid climate.
As September rolls into Kalutara, Sri Lanka, the UV Index hovers at a high 14, indicating an extreme exposure category with a burn time of just 10 minutes. This pattern of elevated UV levels continues from the preceding months, with only slight variations throughout the year. Interestingly, the UV Index peaks in April at 15, but remains consistently extreme from January through August, reflecting a broad trend of intense sun exposure ideal for sun-seekers, while also necessitating caution. With October's index slightly dipping to 13, residents and visitors alike must still prioritize sun protection year-round. For more detailed information, visit Kalutara UV Index.
UV Risk Categories
In September, Kalutara, Sri Lanka basks in a delightful 308 hours of sunshine, continuing a trend of ample daylight that characterizes the region throughout the year. Following the vibrant sunshine of peak summer months like March and April, which see over 330 hours, September marks a slight dip yet remains one of the brighter months, outshining the cooler November with its 281 hours. This consistency in sunny days makes September an inviting time to visit, with the sun still casting its warm glow after the bustling monsoon months, ensuring that both locals and travelers can revel in the beauty of this stunning coastal town.
In Kalutara, Sri Lanka, September typically brings a modest 19% chance of sunny weather, making it one of the less favorable months for sunshine. As summer transitions into the monsoon season, sunlight becomes increasingly elusive, following just below the notably dreary August, which recorded a mere 8% chance of sun. Interestingly, the month does stand out with a slight uptick compared to July, where sunny days are even more scarce at 16%. This trend showcases a gradual increase in sunlit days as the region heads toward October, which offers a 17% chance. Thus, while September may not be the sunniest month, it still offers a hint of brightness before the rains fully take hold.
In September, Kalutara, Sri Lanka, enjoys a consistent 12 hours of daylight, mirroring the extended daylight trends seen in the preceding five months. This period of abundant sunlight underscores the tropical charm of the region, making it ideal for outdoor activities and exploration. As the year progresses towards October, the daylight begins to taper off, returning to 11 hours. This gentle shift, from the summer-like brightness of mid-year to the shorter days of late autumn, creates a captivating rhythm that enhances the vibrant lifestyle of the local culture while inviting both residents and visitors to savor the beauty of the island's natural landscape.
As September unfolds in Kalutara, Sri Lanka, the breeze shares a gentle yet invigorating presence, with an average wind speed of 4.2 m/s (9 mph). This month marks a subtle decline from the peak summer winds of July and August, where gusts reached up to 4.8 m/s (11 mph) and 4.3 m/s (10 mph), respectively. The transition into September hints at a seasonal shift, with winds generally strengthening from the earlier months. From a mere 2.2 m/s (5 mph) in January, the winds steadily build up throughout the mid-year, peaking in July, then tapering off as the months progress toward the year-end. This evolving pattern not only highlights the predictability of Kalutara’s winds but also lends a refreshing quality to the coastal atmosphere, perfect for those seeking both relaxation and adventure.
The weather in Kalutara 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 Kalutara and find detailed weather information for every month.
In September, the weather is characterized by warmer temperatures, with daily averages around 27°C (80°F) and highs reaching up to 30°C (86°F). However, this month experiences significant rainfall, totaling 277 mm (10.9 inches) across 27 days, paired with high humidity levels of 82%. In contrast, January presents a slightly cooler climate, with a minimum temperature of 20°C (69°F) and an average of 26°C (80°F), peaking at 31°C (89°F). Precipitation is notably lower, at 76 mm (3.0 inches) over just 9 days, along with reduced humidity at 77%. For more information, visit Kalutara weather in January.
September and February exhibit distinct weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 30°C (86°F), with an average of 27°C (80°F). This month experiences significant rainfall, totaling 277 mm (10.9 in) over 27 days, resulting in high humidity levels at 82%. In contrast, February offers slightly lower temperatures, with a minimum of 22°C (71°F) and a maximum of 32°C (90°F), while maintaining an average temperature of 27°C (81°F). Rainfall is considerably less in February, at 65 mm (2.5 in) over just 11 days, and the humidity is lower at 73%. For more details on February weather, you can visit Kalutara weather in February.
In comparison to September, March boasts slightly cooler temperatures, with an average of 27°C (82°F) but can peak at a higher maximum of 32°C (90°F) compared to September’s 30°C (86°F). While both months share a similar minimum temperature of around 24°C (75°F), September experiences significantly heavier rainfall at 277 mm (10.9 in) over 27 days, in contrast to March's 118 mm (4.7 in) over just 16 days. Additionally, humidity levels are higher in September at 82%, while March is more comfortable with a humidity of 74%. For a more detailed look at March weather, check out Kalutara weather in March.
September and April exhibit noticeable differences in weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 30°C (86°F), with an average of 27°C (80°F). This month is characterized by significant rainfall, accumulating 277 mm (10.9 in) across 27 days, alongside high humidity at 82%. In contrast, April experiences slightly warmer temperatures, with a minimum of 24°C (76°F) and a maximum of 33°C (91°F), yielding an average of 28°C (82°F). Precipitation is considerably lower, totaling 144 mm (5.7 in) over 24 days, and the humidity is reduced to 74%. For more details on April weather, you can check Kalutara weather in April.
September and May offer slightly different weather patterns, with both months featuring warm temperatures but varying levels of precipitation. September sees average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (86°F), accompanied by significant rainfall totaling 277 mm (10.9 in) over 27 days. In contrast, May experiences slightly higher temperatures, with a minimum of 25°C (77°F) and a maximum of 31°C (88°F), but it also has more substantial rainfall at 347 mm (13.7 in) over 30 days. Additionally, September has a higher humidity level of 82%, compared to May’s 76%. For more detailed weather information, you can check Kalutara weather in May.
When comparing the weather in September and June, we find that both months feature similar temperature ranges, with minimum temperatures around 24-25°C (75-77°F) and maximum temperatures peaking at 30°C (86°F). However, June tends to have slightly higher precipitation at 330 mm (13.0 in) over 29 days compared to September's 277 mm (10.9 in) over 27 days. Despite these differences in rainfall, both months maintain a consistent humidity level of 82%, creating a warm and moist climate. For more detailed information on June weather, you can check out Kalutara weather in June.
When comparing the weather between September and July, we notice that both months experience similar temperature ranges, with minimums around 24-25°C (75-77°F), average highs of 27-30°C (80-86°F), and maximums peaking at 30°C (86°F). However, September tends to be slightly wetter, receiving 277 mm (10.9 in) of precipitation across 27 days, compared to July's 263 mm (10.4 in) over 29 days. Despite the similar average temperatures, both months also maintain high humidity levels at 82%, contributing to a consistently tropical atmosphere. For more detailed insights on July's weather, you can check Kalutara weather in July.
In comparing the weather between August and September, both months maintain a similar temperature range, with August featuring a minimum of 24°C (76°F) and a maximum of 29°C (85°F), while September sees temperatures holding steady with a minimum of 24°C (75°F) and a maximum of 30°C (86°F). However, September experiences slightly less precipitation, totaling 277 mm (10.9 in) over 27 days compared to August's 296 mm (11.6 in) across 29 days. Humidity remains quite consistent, with August at 83% and September at 82%. For a detailed overview of August weather in Kalutara, you can visit Kalutara weather in August.
In September, the weather features a consistent range of temperatures with minimums at 24°C (75°F), averaging around 27°C (80°F), and a maximum of 30°C (86°F). However, it is marked by significant rainfall, totaling 277 mm (10.9 in) over 27 days, and a high humidity level of 82%. In contrast, October maintains a similar temperature profile, with minimums at 24°C (75°F), averages at 27°C (80°F), and a slightly lower maximum of 30°C (85°F). Yet, it experiences even higher rainfall at 324 mm (12.7 in) across 30 days, along with slightly lower humidity at 81%. For a closer look at October's conditions, you can check Kalutara weather in October.
In comparing the weather of September and November, we observe that both months have similar temperature ranges, with September slightly warmer at an average of 27°C (80°F) compared to November's average of 26°C (80°F). Precipitation levels are higher in November, with 292 mm (11.5 in) compared to September's 277 mm (10.9 in), indicating a wetter month despite a marginal decrease in the number of rainy days. Additionally, humidity levels remain high in both months, but September experiences a slight increase at 82% compared to November's 80%. For more details, you can check Kalutara weather in November.
September and December both showcase warm temperatures, with highs averaging around 30°C (86°F) in both months. However, September tends to be slightly warmer, featuring an average temperature of 27°C (80°F) compared to December's 26°C (80°F). Additionally, September is characterized by significantly higher precipitation at 277 mm (10.9 in) over 27 days, while December sees less rain, with 188 mm (7.4 in) across 19 days. Humidity levels remain fairly constant, hovering around 82% in September and slightly decreasing to 80% in December, providing a more comfortable atmosphere by the end of the year. For more details, check out Kalutara weather in December.
In September, Kalutara experiences a distinct shift in weather compared to the preceding months. With an average temperature hovering around a pleasant 27°C (80°F), the air remains warm yet comfortable. However, this month marks a noticeable increase in precipitation, with rain gracing the region for nearly 27 days, contributing to a humidity level of 82%. This combination of warmth and moisture creates a lush landscape, perfect for those who appreciate the beauty of nature rejuvenated by rain. If you're curious to learn more about how Kalutara's weather evolves throughout the year, check out Kalutara Climate.