Last updated: August 21, 2025
September in Jakarta, Indonesia presents a warm and humid climate, with daytime temperatures soaring to a maximum of 35°C (95°F) and averaging around 28°C (82°F). The nights offer a cooler respite, dropping to a comfortable minimum of 22°C (73°F). This month also sees significant rainfall, totaling 71 mm (2.8 in) over approximately 12 days, enhancing the lush greenery that characterizes the region. With an average humidity level of 77%, visitors can expect a tropical atmosphere, making it a lively yet moist experience in this bustling city.
In September, Jakarta experiences warm and captivating temperatures as the transition towards the end of the dry season unfolds. The minimum temperature settles around 22°C (73°F), providing a comfortable start to the day, while the average hovers at a pleasant 28°C (82°F). As the sun rises higher, the maximum temperature can reach an inviting 35°C (95°F), showcasing a peak warmth that encourages outdoor activities and vibrant city life. Notably, September marks a slight uptick in temperatures compared to the previous months, indicating the gradual intensification of the tropical climate. This blend of warm days and cooler nights makes September an appealing time to explore the bustling streets and cultural richness of Indonesia's capital.
As September rolls into Jakarta, the city experiences a modest increase in rainfall, with precipitation totaling 71 mm (2.8 in) over approximately 12 rainy days. This uptick follows a notably dry August, where only 59 mm (2.3 in) fell across just 8 days. While September marks a slight transition towards the wetter months ahead, it remains less intense than the peak rainy season characterized by the heavier downpours of November and December. This gradual increase in precipitation hints at the impending shift in Jakarta's climate, as the city prepares for the heavier showers that define the later months of the year, reminding residents that the lush scenery is just around the corner.
In September, Jakarta's humidity rests at a comfortable 77%, marking a slight dip from the high levels earlier in the year. This month continues the trend of decreasing humidity observed since August, where conditions were also relatively dry at 77%. Following the pattern, the city's humidity begins to gradually rise again into October but remains lower than the peak months of January through March, which hover around 84-86%. This transition reflects a shift in Jakarta's climate as it approaches the end of the dry season, providing a welcome respite from the sweltering tropical heat that dominates the earlier months of the year.
September in Jakarta, Indonesia, sees a UV Index of 13, categorizing it as extreme and maintaining the trend of high UV exposure that begins in the earlier months of the year. This consistent intensity in sunlight means that, regardless of the month, residents and visitors alike have a burn time of just 10 minutes without adequate protection. After a brief dip in June and July, where the index reached 10, the levels rise again, emphasizing the need for vigilance against sun exposure. As the city transitions from August's 11 back to October's 15, it is crucial to remain sun-safe. For detailed insights and tips on how to protect yourself from UV rays, explore Jakarta UV Index.
UV Risk Categories
As September rolls into Jakarta, the city basks in the warm embrace of 304 sunshine hours, ensuring a vibrant atmosphere for both locals and visitors alike. This month continues the trend of abundant sunlight that has graced the city since July, marking one of the brightest periods of the year. With August peaking at 317 hours and May to August consistently surpassing 300 hours, it's clear that the dry season sets the stage for longer, sun-soaked days. Following September, October also offers a respectable 298 hours, keeping the sunshine momentum alive as the year transitions into the latter months. Enjoy this golden time in Jakarta, where each sunlit hour beckons adventure and discovery!
In September, the likelihood of sunny weather in Jakarta holds a moderate 31%, a notable shift from the drier months of July and August, which boast higher probabilities of sunshine at 50% and 37% respectively. As the city transitions from the dry season to the onset of rainier months, September presents a clear trend of diminishing sunlight compared to the summer peak. However, with a significant increase from the extremely low percentages seen in the early months of the year—such as a mere 3% in January—September continues to offer opportunities for bright, sunny days, making it an appealing time to enjoy the city's vibrant atmosphere before the rainy season sets in fully.
In September, Jakarta enjoys a return to 12 hours of daylight, aligning with the city's consistent daylight pattern seen in the first few months of the year. This marks a shift from the shorter daylight of the mid-year, where April through August offered a more muted 11-hour illumination. As the city transitions from the darker months back to the more brightly lit days of October through December, September serves as a gentle reminder of the equatorial balance of light, where day and night remain beautifully equal throughout much of the year.
As September ushers in the transitional season in Jakarta, the city experiences an average wind speed of 1.7 m/s (4 mph), maintaining the calm and gentle breeze characteristic of late dry season. This steady wind speed is consistent with the trends observed since mid-year, with minimal fluctuations since June. The month marks a slight dip from the windier conditions of late summer, as Jakarta prepares for the approaching rainy season. The city's breezy atmosphere during September not only offers a respite from the heat but also invites residents and visitors to enjoy outdoor activities against the backdrop of clear skies.
Weather in Jakarta varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jakarta, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, Jakarta experiences relatively warm temperatures, with a minimum of 22°C (73°F) and an average of 28°C (82°F), peaking at 35°C (95°F). The month sees about 71 mm (2.8 in) of precipitation over 12 days, accompanied by a humidity level of 77%. In stark contrast, January brings slightly cooler temperatures, with a minimum of 23°C (74°F) and an average of 27°C (80°F), while the maximum reaches 33°C (92°F). However, it also comes with significantly higher rainfall, totaling 252 mm (9.9 in) over 24 days, and an increase in humidity to 84%. For more specific details, check out Jakarta weather in January.
September and February present distinctly different weather patterns. In September, temperatures range from a minimum of 22°C (73°F) to a maximum of 35°C (95°F), with an average temperature of 28°C (82°F). The month experiences approximately 71 mm (2.8 in) of rainfall over 12 days and has a humidity level of 77%. In contrast, February is slightly cooler, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 32°C (90°F), and an average of 27°C (80°F). However, February is significantly wetter, receiving 328 mm (12.9 in) of precipitation over 28 days, and features a higher humidity level of 86%. For more detailed information, you can check Jakarta weather in February.
In September, Jakarta experiences warm temperatures with a minimum of 22°C (73°F) and an average of 28°C (82°F), peaking at a maximum of 35°C (95°F). The month sees about 71 mm (2.8 in) of rainfall spread over 12 days, with a humidity level of 77%. In contrast, March tends to be slightly cooler overall, with temperatures ranging from a minimum of 23°C (73°F) to an average of 27°C (81°F) and a maximum of 33°C (92°F). However, March is significantly wetter, receiving 267 mm (10.5 in) of precipitation over 29 days, and carries a higher humidity level of 84%. For more detailed insights, check Jakarta weather in March.
In September, the weather is typically warm and dry, with average temperatures ranging from a minimum of 22°C (73°F) to a maximum of 35°C (95°F). The month experiences around 71 mm (2.8 in) of precipitation over approximately 12 days, with humidity levels around 77%.
In contrast, April sees slightly cooler temperatures, with an average ranging from a minimum of 23°C (74°F) to a maximum of 33°C (92°F). However, it is notably wetter, with precipitation totaling 227 mm (8.9 in) over 26 days and higher humidity at 81%. This significant increase in rainfall makes April distinctly more humid and damp compared to the drier September. For more details on the April weather in Jakarta, visit Jakarta weather in April.
September and May in Jakarta present a similar average temperature, with both months hovering around 28°C (82°F). However, September generally experiences slightly warmer conditions, boasting a maximum temperature of 35°C (95°F) compared to May's peak of 34°C (93°F). Humidity levels are also comparable, with September at 77% and May edging slightly higher at 80%. Precipitation, however, varies notably; May sees significantly more rain, with a total of 125 mm (4.9 in) over 20 days, whereas September receives 71 mm (2.8 in) over just 12 days of rain. For a more detailed look at May's weather, you can visit Jakarta weather in May.
In comparing the weather of September and June, we see that both months feature warm temperatures, but September tends to be slightly hotter overall. September has minimum temperatures around 22°C (73°F) and averages 28°C (82°F), while June starts off a bit warmer with minimums at 23°C (73°F) and averages slightly lower at 27°C (82°F). Precipitation is more frequent in June, with rain falling on 17 days compared to 12 days in September, though September receives slightly less total rainfall at 71 mm (2.8 in) versus June's 79 mm (3.1 in). Humidity levels are quite similar, with September at 77% and June slightly higher at 80%. For more detailed insights on June weather specifically, you can check Jakarta weather in June.
In comparing the weather of September and July, we observe that September is slightly warmer, with average temperatures reaching 28°C (82°F) compared to July’s 27°C (81°F). The highest temperature recorded in September is also higher at 35°C (95°F), while July peaks at 33°C (92°F). Additionally, September experiences more rainfall, with 71 mm (2.8 in) spread over 12 days, versus July’s 43 mm (1.7 in) over 10 days. Humidity levels are relatively similar, with September at 77% and July at 79%. For more details on July weather specifically, you can check Jakarta weather in July.
In comparing the weather between September and August, we find that both months share similar average temperatures, with September experiencing a slightly higher maximum temperature of 35°C (95°F) compared to August's 34°C (93°F). Notably, September has a higher total precipitation of 71 mm (2.8 in) over 12 days, while August recorded 59 mm (2.3 in) over just 8 days. Humidity levels remain consistent at 77% for both months, contributing to the tropical feel of Jakarta. For more details on August weather, you can visit Jakarta weather in August.
In September, the weather remains warm with average temperatures ranging from a minimum of 22°C (73°F) to a maximum of 35°C (95°F). However, it experiences 71 mm (2.8 in) of precipitation over 12 days, keeping humidity levels at 77%. In contrast, October sees a slight rise in minimum temperature to 23°C (74°F) while maintaining a similar average of 28°C (83°F), and a higher maximum of 35°C (96°F). October also brings increased rainfall, totaling 115 mm (4.5 in) over 18 days, resulting in a marginally higher humidity of 78%. For further details on the weather conditions in October, check out Jakarta weather in October.
In September, the weather features warm temperatures with a minimum of 22°C (73°F) and an average of 28°C (82°F), peaking at 35°C (95°F). This month experiences moderate rainfall of 71 mm (2.8 in) over about 12 days, with humidity averaging 77%. In contrast, November sees a slight increase in minimum temperature to 23°C (74°F) and a decrease in the maximum temperature to 34°C (94°F), while still maintaining the same average of 28°C (82°F). However, November is much wetter, with precipitation reaching 195 mm (7.7 in) over 24 days, and humidity rising to 80%. For more details on the weather specifics, you can check Jakarta weather in November.
September and December in Jakarta showcase distinct weather patterns. In September, the temperatures range from a minimum of 22°C (73°F) to a maximum of 35°C (95°F), with an average of 28°C (82°F). The month sees moderate rainfall of 71 mm (2.8 in) across about 12 days, coupled with humidity levels around 77%. In contrast, December experiences slightly cooler temperatures, with averages around 27°C (81°F) and a minimum of 23°C (74°F), but it also brings significantly higher precipitation totaling 241 mm (9.5 in) over about 26 days, contributing to a humidity level of 79%. For a more detailed look at December weather, you can check this link: Jakarta weather in December.
As September rolls in, Jakarta experiences a climate that marks a subtle shift from the peak of dry season, with temperatures averaging a warm 28°C (82°F) and reaching up to 35°C (95°F). While the humidity remains high at 77%, making the air feel quite muggy, the month also brings occasional rainfall, with precipitation occurring on about 12 days totaling 71 mm (2.8 in). This increase in rain transforms the landscape, providing a refreshing contrast to the drier months prior, signaling the approach of the wet season. For a deeper dive into Jakarta's weather patterns, be sure to check out Jakarta Climate.