Last updated: August 21, 2025
In September, Ancol, Indonesia experiences a temperate climate characterized by an average temperature of 22°C (72°F), with daytime highs reaching up to 29°C (84°F) and nighttime lows dipping to 17°C (62°F). This month also brings a moderate level of rainfall, accumulating to about 121 mm (4.8 in) over 16 days, contributing to a humidity level of 72%. Visitors can expect a mix of sunny and wet days, making September an intriguing time to explore this vibrant coastal destination.
In September, Ancol experiences a transition towards warmer temperatures, with minimums reaching 17°C (62°F) and maximums hovering around 29°C (84°F). The average temperature settles at a comfortable 22°C (72°F), reflecting a slight uptick from the cooler months of July and August. This shift marks the tail end of the cooler dry season, as the region gradually prepares for the warmer, wetter months ahead. While September still boasts pleasant temperatures, it's an indication that the tropical climate of Ancol is moving towards its fuller warmth, inviting visitors to enjoy both the vibrant atmosphere and the lush surroundings.
In September, Ancol experiences a notable uptick in precipitation, recording 121 mm (4.8 in) of rain over 16 days. This marks a departure from the drier months of July and August, where rainfall was significantly lower at 63 mm and 68 mm respectively. The return of humidity hints at the impending wet season, setting the stage for a dramatic increase in rainfall as the months transition into October and November, often marked by torrential downpours. The shift not only rejuvenates the landscape, but also signals to locals and visitors alike that the vibrant, lush beauty of Ancol is about to flourish.
In September, Ancol, Indonesia experiences a notable dip in humidity, registering at 72%, which is the lowest point of the year. This decrease marks a significant shift from the high humidity levels seen earlier in the year, particularly in February with a peak of 87%. The trend illustrates a gradual decline in humidity from the peak of the rainy season, beginning in August at 76%, and continuing into the drier months. As the region transitions into the latter part of the year, humidity levels typically range between 72% and 78%, creating a more comfortable atmosphere compared to the sweltering conditions earlier in the year. This refreshing change enhances the appeal of outdoor activities in Ancol, inviting locals and tourists alike to enjoy the vibrant coastal scenery.
In September, Ancol, Indonesia, experiences a UV Index of 14, categorizing it as extreme with a burn time of just 10 minutes. This month continues the trend observed throughout the year, where the UV Index remains consistently high, particularly from January to March and again in October. Significantly, the UV levels have been on a gradual decline since their peak earlier in the year, dropping slightly from 16 in February and March to 14 in September. Despite this minor decrease, visitors should remain vigilant and protect their skin from harmful UV rays during this time. For more information on UV levels throughout the year, you can check the detailed Ancol UV Index.
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September in Ancol, Indonesia, glows with 305 hours of sunshine, a delightful continuation of the sunny streak from the previous months. The summer peak reaches its zenith in July and August, where the sun graces the region with a remarkable 313 and 316 hours, respectively. As the season subtly shifts into autumn, September still maintains an impressive amount of sun, showing a slight decline yet remaining robust compared to the earlier months of the year. This pattern highlights Ancol's vibrant climate, where the warm embrace of sunshine lingers well into the late months, making it an ideal destination for sun-seekers and beach lovers alike. As autumn approaches, the promise of October's 300 hours reassures that the sunny allure of Ancol will continue to shine bright.
In Ancol, Indonesia, September marks a transitional period in terms of sunny weather, with a 13% chance of sunshine. This follows a summer peak in May and July, where the chance of sun rises to 25% and 26%, respectively. As the months progress, however, the likelihood of clear skies diminishes, dropping notably in October to just 7%. This downward trend in sunlight from the vibrant summer months indicates that while September might still offer a few bright days, the rainy season looms on the horizon, reminding us to appreciate the fleeting sunshine while it lasts.
In Ancol, Indonesia, September marks a refreshing return to longer daylight hours, with the sun gracing the skies for a full 12 hours each day. This resurgence follows the slightly shorter days of the preceding months, from April to August, when daylight dipped to 11 hours. Interestingly, the daylight pattern remains consistent throughout the rest of the year, with 12 hours from January to March and October to December. Such rhythmic variations create a unique atmosphere, inviting both locals and visitors to embrace the vibrant energy of September, as nature flourishes under the sun's warm glow.
As September rolls into Ancol, Indonesia, the coastal breeze reaches a delightful peak with an average wind speed of 2.1 m/s (5 mph), consistent with the lively gusts of August. This month marks a time of transition, where the wind whispers tales of the changing seasons, reminding us of the gradual shift from the heightened breeziness of summer to the calmer days ahead. Throughout the year, the wind speed in Ancol often hovers around the gentle 1.4 to 1.6 m/s (3 to 4 mph) range, only to elevate notably in the mid-year months of July and August. As we embrace September's breezy embrace, it's evident that the winds here carry a spirited vitality, perfect for outdoor adventures and serene moments by the sea.
Weather in Ancol varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ancol, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinct weather characteristics. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 29°C (84°F), with an average of 22°C (72°F). The month sees about 121 mm (4.8 in) of precipitation spread over 16 days, along with a humidity level of 72%. In contrast, January offers slightly warmer conditions, with temperatures varying from a minimum of 20°C (69°F) to a maximum of 31°C (87°F) and an average of 24°C (76°F). However, January is much wetter, receiving 393 mm (15.5 in) of rain over 24 days and higher humidity at 84%. For a more detailed look at January's weather, check out Ancol weather in January.
September and February offer distinct weather experiences. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 29°C (84°F), with an average of 22°C (72°F). The month typically sees 121 mm (4.8 in) of precipitation over 16 days, accompanied by a humidity level of 72%. In contrast, February is warmer, with temperatures spanning from 20°C (68°F) to 30°C (86°F) and an average of 24°C (76°F). However, it is significantly wetter with 435 mm (17.1 in) of rainfall occurring over 27 days and a higher humidity level of 87%. For more specific details, you can check Ancol weather in February.
September and March present distinct weather characteristics, with March typically experiencing warmer temperatures than September. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 29°C (84°F), with an average of 22°C (72°F). In contrast, March shows slightly higher temperatures, with a minimum of 20°C (68°F), an average of 24°C (76°F), and a maximum of 30°C (87°F). However, March brings significantly more rainfall, totaling 409 mm (16.1 in) spread over 29 days, compared to September's 121 mm (4.8 in) over just 16 days. Additionally, March's humidity is notably higher at 85%, compared to September's 72%. For more detailed insights about this weather trend, check out Ancol weather in March.
When comparing the weather in September to that in April, several notable differences emerge. September typically sees milder temperatures, with a minimum of 17°C (62°F) and an average of 22°C (72°F), peaking at 29°C (84°F). In contrast, April offers warmer conditions, featuring a minimum of 18°C (65°F) and reaching an average of 25°C (76°F), with maximum temperatures soaring to 32°C (89°F).
However, April is substantially wetter than September, receiving 361 mm (14.2 in) of rainfall over 27 days compared to September's 121 mm (4.8 in) over 16 days. Additionally, humidity levels are slightly higher in April at 82%, compared to 72% in September. For more detailed insights about April weather in the region, check out Ancol weather in April.
September weather features a broader range of temperatures, with a minimum of 17°C (62°F) and a maximum of 29°C (84°F), leading to an average of 22°C (72°F). In contrast, May is slightly warmer, starting at a minimum of 19°C (67°F) and reaching up to 31°C (87°F), with an average temperature of 24°C (76°F). Rainfall is more pronounced in May, totaling 195 mm (7.7 in) over 21 days compared to September's 121 mm (4.8 in) spread across 16 days. Additionally, May experiences higher humidity at 81%, compared to September's 72%. For a detailed look at the weather conditions in May, check out Ancol weather in May.
September and June exhibit relatively mild temperatures, with June slightly cooler on average. In June, temperatures range from a minimum of 16°C to a maximum of 30°C, while September boasts a minimum of 17°C and a maximum of 29°C. Both months experience significant precipitation, with September seeing 121 mm over 16 days and June receiving 108 mm over 17 days. However, humidity levels are higher in June at 81%, compared to 72% in September, contributing to a more humid feel during the early summer. For more detailed information on June weather, you can refer to Ancol weather in June.
When comparing the weather in September and July, we see some notable differences. September has a slightly higher minimum temperature of 17°C (62°F) compared to July's 15°C (60°F), while both months maintain the same average temperature of 22°C (72°F). July typically reaches a higher maximum temperature of 30°C (86°F), whereas September peaks at 29°C (84°F). Precipitation in September is significantly greater, totaling 121 mm (4.8 in) over 16 days, compared to July's 63 mm (2.5 in) over 15 days. Additionally, September tends to be a bit more humid, with an average humidity of 72% versus July's 79%. For more details, you can check Ancol weather in July.
In comparing the weather patterns of September and August, both months exhibit similar temperature ranges, with September showing a slight increase in minimum temperature at 17°C (62°F) compared to August's 15°C (60°F). Both months share an average and maximum temperature of 22°C (71°F) and 29°C (84°F), respectively. However, September experiences significantly more rainfall, with 121 mm (4.8 in) of precipitation over 16 days, compared to August's 68 mm (2.7 in) over 14 days. Additionally, September's humidity averages 72%, slightly lower than August's 76%. For more details on August weather, you can visit Ancol weather in August.
September and October exhibit relatively similar yet distinct weather patterns. In September, the temperatures range from a minimum of 17°C (62°F) to a maximum of 29°C (84°F), with an average of 22°C (72°F). This month experiences a total of 121 mm (4.8 in) of precipitation over 16 days, accompanied by a humidity level of 72%. In contrast, October sees slightly warmer temperatures, with a minimum of 18°C (65°F) and a maximum of 30°C (86°F), average temperatures reaching 23°C (74°F). However, this month is notably wetter, recording 186 mm (7.3 in) of precipitation across 24 days and a marginal increase in humidity to 74%. For a more detailed look at the conditions in October, you can check Ancol weather in October.
When comparing the weather in September and November, we see a noticeable increase in temperature and precipitation levels. September typically experiences a minimum temperature of 17°C (62°F) and a maximum of 29°C (84°F), with an average of 22°C (72°F) over 16 rainy days, accumulating 121 mm (4.8 in) of rainfall at a humidity level of 72%. In contrast, November presents warmer temperatures, with lows of 18°C (66°F) and highs reaching 31°C (88°F), averaging 24°C (75°F). However, the month is also significantly wetter, receiving 421 mm (16.6 in) of rain across 26 days, and humidity rises to 78%. For more specific details, check out Ancol weather in November.
In comparing the weather between September and December, it's clear that December is generally warmer and more humid. September has a milder temperature range, with averages around 22°C (72°F) and maximums of 29°C (84°F), while December sees higher temperatures, averaging 24°C (76°F) with maximums reaching up to 31°C (88°F). In terms of precipitation, December experiences significantly more rainfall, totaling 366 mm (14.4 in) over 28 days, compared to September's 121 mm (4.8 in) over 16 days. The humidity also increases slightly from 72% in September to 78% in December, making it feel even more tropical during the latter month. For detailed weather insights, visit Ancol weather in December.
September in Ancol presents a delightful transition marked by mild temperatures, making it cooler compared to the sweltering months that precede it. The average humidity remains at a comfortable level, but the increased precipitation can lead to a refreshing ambiance, transforming the landscape into vibrant greens. With about half of the days experiencing some rain, this month is ideal for those who appreciate the fusion of sun and periodic showers. Whether you're soaking in the rich outdoors or enjoying the cooler evenings, September offers a unique charm distinct from the hotter summer months. For those curious about Ancol's overall climate patterns, check out Ancol Climate.