Last updated: March 19, 2025
Experience the vibrant climate of Polonnaruwa, Sri Lanka in September, where temperatures soar with a maximum reaching up to 39°C (102°F) and an average of 29°C (84°F), providing a warm backdrop for exploration. Overnight, the temperature drops to a comfortable minimum of 23°C (74°F). This month also witnesses a total precipitation of 77 mm (3.1 in) over 11 days, contributing to the lush landscapes that define the region. With humidity levels hovering around 81%, visitors should prepare for a tropical experience that enhances the beauty and allure of this historical site.
In September, Polonnaruwa experiences warm temperatures that reflect the tail end of the dry season, with a typical minimum of 23°C (74°F) and an average of 29°C (84°F). The heat peaks at a maximum of 39°C (102°F), resembling the intense warmth seen throughout the preceding months. This month maintains consistent warmth with minimal fluctuations in temperature compared to August, hinting at the region's tropical climate. Visitors can expect sunny days and sultry evenings, ideal for exploring the ancient ruins and lush landscapes that Polonnaruwa is renowned for. As the month progresses, the weather gradually transitions, paving the way for the cooler days of October, but September remains firmly in the grip of summer's warmth.
In September, Polonnaruwa experiences a notable uptick in rainfall, accumulating an average of 77 mm (3.1 in) over approximately 11 days. This marks a transition from the drier months of July (39 mm) and August (29 mm), as the region gears up for the heavier precipitation that follows in October and November. Notably, the rainfall in September contributes to a significant climatic shift, leading into the peak monsoon season, where the average precipitation can soar to 237 mm (9.3 in) in October and even 287 mm (11.3 in) in November. This gradual increase in rainfall not only nourishes the lush landscapes but also indicates the region's reliance on seasonal rains for agriculture and water resources.
In September, Polonnaruwa experiences a humidity level of 81%, marking a continuation of the high humidity trend that characterizes the latter half of the year. Following the peaks of 85% in both June and August, September sees a slight decrease, yet remains significantly humid. This month is a transitional period, as it prepares to move into the even more humid months of October and November, where humidity levels hit 89% and 88%, respectively. Overall, the humidity data reveals a pattern where the dry months of January through April give way to a distinctly more humid atmosphere starting in May, peaking mid-year, and maintaining a high average well into the final quarter.
In September, the UV Index in Polonnaruwa, Sri Lanka reaches a notable 14, maintaining the extreme exposure category that has characterized much of the year. This consistent intensity, with a burn time of just 10 minutes, highlights the importance of sun protection, a trend evident from January through August when indices remained similarly high, peaking at 15 in March. As the months transition to October and beyond, a slight easing occurs, yet the UV levels often remain alarmingly high, emphasizing the need for vigilance against sun damage. For further insights, explore detailed forecasts at Polonnaruwa UV Index.
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As September settles in Polonnaruwa, the city basks in an impressive 317 hours of sunshine, continuing the region's reputation for abundant light. Encased within a broader pattern, September's hours reflect a slight dip after the sun-drenched heights of July and August, both boasting over 340 hours each. This transition hints at the gradual shift towards the cooler months of October and November, where sunshine subtly wanes but still delivers a commendable 308 hours and 270 hours, respectively. Overall, Polonnaruwa offers a vibrant tapestry of sunlight, inviting visitors to explore its cultural treasures in a warm, radiant glow throughout the year.
In September, Polonnaruwa experiences a modest 20% chance of sunny weather, which is among the lower probabilities for the year. This trend follows a generally rainy mid-year, with August plunging to a mere 9%, while the preceding months, like April with a promising 51%, hint at a seasonal transition. As the landscape shifts from the vibrant hues of the dry season to the cooler, wetter months ahead, travelers should prepare for occasional sun mixed with rain. The overall pattern suggests that while sunny days can be delightful, visitors in September should embrace the likelihood of clouds, as the region gears up for its wetter climate.
In Polonnaruwa, Sri Lanka, the month of September aligns with a consistent pattern of daylight, offering 12 hours of sunlight each day. As the year progresses from January through March, daylight gradually increases from 11 to 12 hours, creating a bright and vibrant atmosphere typical of the region. This steady abundance of sunlight is maintained throughout the summer months of April to August. Interestingly, September's daylight duration remains unchanged from its summer peak, suggesting that the region enjoys a balanced and stable climate as it transitions into the autumn months. Following September, daylight begins to shorten again in October, returning to 11 hours by November and December, signaling the start of the cooler season. This cyclical rhythm highlights the enchanting stability of Sri Lanka's equatorial days.
In September, Polonnaruwa experiences a gentle yet refreshing breeze, with average wind speeds of 4.7 m/s (10 mph), making it one of the more moderate months for wind. Following the peak winds of June and July, which boast speeds of 5.0 m/s (11 mph) and 5.1 m/s (11 mph), respectively, September shows a slight decrease in wind intensity. This transition hints at the calming shift from the more turbulent midsummer months to the approaching tranquility of the fall season. The overall pattern reveals a gradual increase in wind speeds from the earlier months of the year, surpassing the winter lows of January and April, where the winds barely register above 1.8 m/s (4 mph). This rhythmic fluctuation not only enhances the atmosphere of Polonnaruwa but also invites visitors to enjoy the region's natural beauty, especially in the vibrant backdrop of September.
The weather in Polonnaruwa 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 Polonnaruwa and find detailed weather information for every month.
In September, temperatures are generally warmer, with a range from a minimum of 23°C (74°F) to a maximum of 39°C (102°F) and an average of 29°C (84°F). The month also experiences high humidity at 81% and around 77 mm (3.1 in) of rainfall over approximately 11 days. In contrast, January brings cooler weather, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 32°C (89°F), averaging 25°C (77°F). While January has slightly higher precipitation at 92 mm (3.6 in) spread over 12 days, the humidity remains similar at 80%. For more details on January weather specifically, check out Polonnaruwa weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 23°C (74°F) to a scorching maximum of 39°C (102°F), with an average temperature of 29°C (84°F). The month experiences relatively high humidity at 81% and significant rainfall, totaling 77 mm (3.1 in) over 11 days. In comparison, February is milder, with temperatures varying from a minimum of 17°C (63°F) to a maximum of 34°C (93°F), yielding an average of 26°C (78°F). February sees less rainfall, with only 45 mm (1.8 in) over 12 days, and humidity is lower at 72%. For more detailed information, check out Polonnaruwa weather in February.
In September, temperatures soar higher with a minimum of 23°C (74°F) and an average of 29°C (84°F), reaching a maximum of 39°C (102°F). The month also experiences significant rainfall, accumulating 77 mm (3.1 in) over approximately 11 days, alongside high humidity levels at 81%. Conversely, March offers a slightly cooler climate, with minimum temperatures around 19°C (66°F) and an average of 27°C (81°F), peaking at 36°C (97°F). Precipitation in March is less, totaling 54 mm (2.1 in) across 10 days, and humidity is lower at 69%. For more details on March weather, check out Polonnaruwa weather in March.
September and April exhibit similar average temperatures, both hovering around 29°C (84°F). However, September tends to be slightly warmer at its minimum and maximum temperatures, ranging from 23°C (74°F) to 39°C (102°F), compared to April's range of 20°C (68°F) to 38°C (101°F). Precipitation is more frequent in September, with 77 mm (3.1 in) falling over 11 days, while April sees less rain at 63 mm (2.5 in) over 10 days. Additionally, the humidity level is notably higher in September at 81%, contrasting with April's more comfortable 69%. For a closer look at April's weather specifics, you can check out Polonnaruwa weather in April.
In comparing the weather in September and May, both months show similar temperature ranges, with minimums at 23°C (74°F), average temperatures around 29°C (84-85°F), and maximums peaking at 39°C (102°F). However, May tends to be slightly wetter, receiving 115 mm (4.5 in) of precipitation over 13 days compared to September's 77 mm (3.1 in) over 11 days. Interestingly, humidity levels are quite similar, with September at 81% and May a touch lower at 79%. For those seeking more detailed insights, visit Polonnaruwa weather in May.
When comparing the weather in September and June, September tends to be slightly cooler with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 39°C (102°F), while June features a minimum of 25°C (76°F) and a maximum of 38°C (101°F). Humidity levels in both months are fairly high, with September at 81% and June slightly higher at 85%. However, September experiences significantly more rainfall, totaling 77 mm (3.1 in) over 11 days, compared to June's 17 mm (0.7 in) over just 3 days. This makes September not only warmer in terms of high temperatures but also wetter and more humid than June. For more detailed insights, you can check out Polonnaruwa weather in June.
When comparing the weather in September and July, you'll notice some subtle differences. Both months experience high temperatures, with September's average reaching 29°C (84°F) compared to July’s average of 30°C (86°F). The minimum temperatures are quite similar, hovering around 23°C (74°F) in September and slightly higher at 24°C (76°F) in July. However, September sees significantly more precipitation, totaling 77 mm (3.1 in) over 11 days, while July receives only 39 mm (1.5 in) over 7 days. Despite having the same humidity level of 81%, the increased rainfall in September may make it feel more damp compared to the relatively drier days of July. For more detailed information about July weather, you can check out Polonnaruwa weather in July.
In comparing the weather of September to that of August, we see some notable differences. September tends to be slightly cooler, with a minimum temperature of 23°C (74°F) compared to August's 24°C (75°F). Both months share the same maximum temperature of 39°C (102°F), but September features a higher average temperature of 29°C (84°F) against August's 29°C (85°F). Precipitation rises significantly in September, with 77 mm (3.1 in) falling across 11 days, whereas August sees only 29 mm (1.1 in) over 6 days. Humidity is also marginally lower in September at 81%, compared to 85% in August. For more details, you can check out Polonnaruwa weather in August.
In September, the weather is characterized by a hot and humid climate, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 39°C (102°F) and an average of 29°C (84°F). The month sees about 77 mm (3.1 in) of precipitation across 11 days, resulting in a humidity level of 81%.
In contrast, October brings slightly lower average temperatures, ranging from 23°C (73°F) to 38°C (100°F), with an average of 28°C (82°F). However, this month experiences a significant increase in rainfall, totaling 237 mm (9.3 in) over 20 days, and a rise in humidity to 89%. This increase in precipitation and humidity marks October as a wetter and more humid month compared to September. For more detailed information, you can reference Polonnaruwa weather in October.
September weather in Polonnaruwa tends to be warm and humid, with average temperatures reaching up to 29°C (84°F) and a maximum of 39°C (102°F). Despite the heat, September experiences relatively moderate precipitation at 77 mm (3.1 in) over about 11 days. In contrast, November brings a significant shift in weather patterns, with average temperatures dropping to 26°C (80°F) and a maximum of 36°C (97°F). However, November is much wetter, receiving a substantial 287 mm (11.3 in) of rain over 24 days, contributing to higher humidity levels of 88%. For a more detailed outlook on November weather, check out Polonnaruwa weather in November.
September weather is characterized by warmer temperatures, with an average of 29°C (84°F) and maximums reaching up to 39°C (102°F). The month also experiences significantly lower precipitation, totaling 77 mm (3.1 in) over 11 days, with humidity levels around 81%. In contrast, December sees cooler temperatures, averaging 26°C (78°F) and peaking at 33°C (91°F), but it is also much wetter, with 185 mm (7.3 in) of rain spread over 21 days and a slightly higher humidity of 86%. For more detailed information, you can check Polonnaruwa weather in December.
In September, Polonnaruwa experiences a notable shift in weather, presenting a blend of warmth and humidity that distinguishes it from the drier months. With average temperatures hovering around a comfortable 29°C, it’s not as scorching as the peak summer months, yet it features increased rainfall, with 11 days of precipitation contributing to a lush landscape. The humidity level rises to 81%, creating a noticeably different feel in the air. This transition into the wet season marks a dynamic change, making September a unique time to visit. For more detailed insights into Polonnaruwa’s climatic patterns, explore Polonnaruwa Climate.