September Weather in Yogyakarta, Indonesia

Last updated: August 21, 2025

Yogyakarta experiences a warm and humid September with maximum temperatures reaching 33°C (91°F) and an average of 25°C (76°F), offering a comfortable climate for outdoor exploration. As the month progresses, expect a minimum temperature of 18°C (64°F), making evenings pleasantly cool. However, rain is prevalent, with precipitation amounting to 84 mm (3.3 in) across 13 rainy days, adding to the lush greenery of this cultural hub. With humidity levels hovering around 70%, visitors should prepare for a tropical atmosphere, perfect for enjoying Yogyakarta’s vibrant local scene while staying hydrated.

September Temperature in Yogyakarta

As September rolls into Yogyakarta, Indonesia, the temperatures start to show a gradual shift, hinting at a transition towards the wetter months. With a minimum of 18°C (64°F) and a comfortable average of 25°C (76°F), the days are still warm, reaching up to 33°C (91°F) during peak afternoons. This month marks a slight increase compared to the cooler August, which saw its minimum dip to 16°C (61°F). The weather remains pleasantly warm, making it an inviting time for exploration, although the humidity begins to rise, foreshadowing the impending rainier season. Overall, September offers a delightful climate for both locals and visitors, blending comfortable warmth with the vibrant energy of the city.

September Weather in Yogyakarta: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Yogyakarta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yogyakarta, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec797979807978757576777879
Data source: Temperature data for Yogyakarta generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Yogyakarta

September in Yogyakarta experiences a noticeable uptick in precipitation, receiving 84 mm (3.3 in) of rain over an average of 13 days. This marks a slight increase from the drier months of July and August, where only 25 mm (1.0 in) fell in each month, signaling the gradual transition into the wetter season. The precipitation pattern starts to build up again after the dry spell, laying the groundwork for the subsequent significantly rainier months of October and November. The shift towards wetter weather hints at the impending monsoon, underscoring Yogyakarta's characteristic tropical climate where rainfall tends to be heaviest towards the year’s end.

September Precipitation Trends in Yogyakarta

The chart displays monthly precipitation patterns in Yogyakarta, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Yogyakarta, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec32035833026311299252584162382364
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yogyakarta

As September arrives in Yogyakarta, Indonesia, the humidity begins to dip, reaching a comfortable 70%—the lowest point of the year. This decline from the peak levels of 86% in February and 84% in March marks the start of a transition towards drier months. Notably, after the high humidity typical of the early months, the late summer and early autumn show a gradual reduction, with August at 74% and October rebounding slightly to 72%. This trend indicates a subtle yet pleasant shift in the climate, inviting residents and visitors to enjoy the balmy days without the oppressive stickiness of earlier months. As the year progresses, September stands out as a refreshing respite, setting the stage for the more moderate humidity that follows.

September Average Humidity in Yogyakarta

This chart illustrates the average monthly humidity levels in Yogyakarta, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Yogyakarta is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%86%84%80%81%81%78%74%70%72%73%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yogyakarta

In September, Yogyakarta experiences a UV Index of 15, which falls into the extreme exposure category, reflecting a consistent trend in high UV levels throughout the year. Just like in the preceding months, the burn time remains a swift 10 minutes, urging outdoor enthusiasts to take precautions when basking in the tropical sun. This spike in UV intensity has been characteristic from January to March, where indices peaked at 16, and remains prevalent as we transition into the end of the year. For those keen on exploring the vibrant streets and natural beauty of Yogyakarta, staying informed about UV levels is crucial for enjoying the outdoors safely. For more details, check out the Yogyakarta UV Index.

Maximum UV Index Levels in Yogyakarta for September

The chart shows the monthly maximum UV Index (UVI) for Yogyakarta in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Yogyakarta typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616141310111315161514
Data source: Yogyakarta September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Yogyakarta

As September rolls into Yogyakarta, the city basks in 307 hours of radiant sunshine, continuing the trend of abundant daylight that has characterized the past few months. Following a peak in July and August with an impressive 316 hours each, this month gracefully dips while still showcasing a wealth of sunny days. The steady pattern of increasing sunlight from January’s 204 hours to May’s 303 hours reflects Yogyakarta's delightful transition into its sunny season. With October expected to maintain close to September's warmth at 310 hours, the vibrant energy of Yogyakarta is certainly illuminated by its sun-filled skies, inviting locals and travelers alike to relish in the beauty of this enchanting destination.

Monthly Sunshine Duration in Yogyakarta: September Highlighted

The September sunshine duration represents the total number of hours Yogyakarta experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec204h248h283h289h303h298h316h316h307h310h256h275h
Data source: Yogyakarta September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Yogyakarta During September

In Yogyakarta, Indonesia, the likelihood of sunny weather in September stands at 29%, reflecting a slight dip from the vibrant July and August months, which enjoy higher probabilities of sunshine at 47% and 41%, respectively. This gradual decline aligns with the onset of the rainy season, which starts to make its presence felt in the following months. As September closes the dry season, it still offers a fair share of sunny days, making it a pleasant window for outdoor activities and exploration before the weather shifts significantly in October, where the chance of sun drops to just 14%. Thus, while the sunshine in September may not be as abundant as in the peak summer months, it remains a solid choice for those looking to bask in the warm tropical atmosphere.

Percentage of Sunny Days in September in Yogyakarta

The chart illustrates the percentage of sunny days in Yogyakarta throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Yogyakarta experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec2%5%8%32%34%30%47%41%29%14%5%6%
Data source: Yogyakarta September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Yogyakarta in September

In Yogyakarta, Indonesia, September marks a notable transition in daylight duration, as the year returns to an average of 12 hours of sunshine per day. Following several months of consistent 11-hour daylight, this shift not only invigorates the environment but also signals the onset of a more vibrant atmosphere. As the days remain longer, residents and visitors alike can relish the outdoor activities that this extra sunlight affords. This pattern of 12-hour daylight continues through to March, creating a balanced rhythm in which locals embrace both the beauty of natural light and the mellow evenings that follow. Overall, September serves as a delightful reminder of the region's unique climatic consistency, where daylight becomes a cherished companion year-round.

Average Daylight Hours in Yogyakarta for September

The chart illustrates the variation in daylight duration in Yogyakarta throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 30m12h 20m12h 7m11h 54m11h 44m11h 39m11h 42m11h 50m12h 2m12h 15m12h 27m12h 33m
Data source: Yogyakarta daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Yogyakarta

In September, Yogyakarta experiences a gentle breeze with an average wind speed of 2.0 m/s (4 mph), echoing the increased airflow noted in the preceding months of July and August. This mild wind provides a refreshing contrast to the heat, making outdoor activities even more enjoyable. The trend reveals a subtle peak in wind speeds during the mid-year summer months, followed by a gradual decline as the year progresses into the wetter season. As the winds shift, they carry the unmistakable scents of the approaching rainy season, hinting at the dynamic interplay between dry and wet in this vibrant Indonesian locale.

Average September Wind Speed in Yogyakarta

The chart displays monthly wind speed patterns in Yogyakarta, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.61.61.41.51.61.42.02.22.0 m/s1.91.31.6
Data source: Yogyakarta September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Yogyakarta Compares to Other Months

Weather in Yogyakarta varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yogyakarta, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, the weather is generally warm with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 33°C (91°F) and an average of 25°C (76°F). There is moderate rainfall, with 84 mm (3.3 in) spread over 13 days, and humidity levels sit at around 70%. In contrast, January experiences slightly warmer temperatures, with a minimum of 21°C (70°F), an average of 26°C (79°F), and a maximum of 32°C (91°F). However, it is significantly wetter, with 320 mm (12.6 in) of rain over 24 days and higher humidity at 82%. This comparison highlights how January is not only warmer but also much rainier than September. For more details, you can check Yogyakarta weather in January.

When comparing the weather in September and February, notable differences emerge. September tends to be slightly cooler, with temperatures ranging from a minimum of 18°C (64°F) to an average of 25°C (76°F), peaking at a maximum of 33°C (91°F). The month experiences moderate precipitation of 84 mm (3.3 in) over approximately 13 days, accompanied by a humidity level of about 70%. In contrast, February is warmer, with minimum temperatures starting at 21°C (71°F) and an average of 26°C (79°F), while still reaching a maximum of 33°C (91°F). However, February is significantly wetter, accumulating 358 mm (14.1 in) of rain over 27 days and exhibiting higher humidity at 86%. For a detailed overview, you can check Yogyakarta weather in February.

When comparing the weather in September and March, we see notable differences in both temperature and precipitation. September generally experiences milder temperatures, with minimums around 18°C (64°F) and average highs of 33°C (91°F), accompanied by a relatively moderate humidity of 70%. In contrast, March shows slightly warmer temperatures, with minimums starting at 22°C (72°F) and averages reaching 26°C (79°F), while humidity rises to 84%. Furthermore, March is considerably wetter, receiving 330 mm (13.0 in) of rain over 28 days, compared to September's 84 mm (3.3 in) over just 13 days. For a more detailed look at March weather conditions, you can check Yogyakarta weather in March.

When comparing the weather in September and April, September offers slightly milder temperatures, with an average of 25°C (76°F) and a minimum of 18°C (64°F), while April has a higher average temperature of 26°C (80°F) and a minimum of 21°C (70°F). Both months can reach a maximum of 33°C (91°F), but April sees significantly more rainfall, with total precipitation of 263 mm (10.4 in) over 27 days compared to September's 84 mm (3.3 in) over 13 days. Additionally, humidity levels are higher in April at 80% versus September's 70%. For a more detailed look at the weather patterns, you can check Yogyakarta weather in April.

In comparing the weather of September and May, both months share a maximum temperature of 33°C (91°F), but September generally experiences slightly lower temperatures, with averages of 25°C (76°F) compared to May's 26°C (80°F). Additionally, September has a minimum temperature of 18°C (64°F), which is cooler than May’s minimum of 21°C (70°F). Rainfall is more prevalent in May, with 112 mm (4.4 inches) of precipitation over 17 days, compared to September's 84 mm (3.3 inches) over 13 days. This results in higher humidity levels in May at 81%, while September sees a humidity of 70%. For more details on the weather during this month, visit Yogyakarta weather in May.

In September, the weather presents a slightly warmer atmosphere than in June, with average temperatures peaking at 25°C (76°F) and reaching a maximum of 33°C (91°F). Precipitation levels are lower in September, with 84 mm (3.3 in) of rain over 13 days, compared to June's higher precipitation of 99 mm (3.9 in) over 15 days. The humidity in September is also lower at 70%, while June experiences a higher humidity level of 81%. For more insights on the weather in June, you can visit Yogyakarta weather in June.

September typically experiences slightly warmer weather compared to July, with average temperatures reaching 25°C (76°F) and maximums hitting 33°C (91°F) versus July's average of 24°C (76°F) and maximum of 32°C (90°F). While both months have similar minimum temperatures, September sees more precipitation, totaling 84 mm (3.3 in) over 13 days, in contrast to July's 25 mm (1.0 in) over just 8 days. Additionally, humidity levels are a bit higher in July at 78% compared to 70% in September. For a detailed look at July's climate, visit Yogyakarta weather in July.

In September, the weather is generally warmer and wetter compared to August. The minimum temperature rises to 18°C (64°F) from August's 16°C (61°F), while the average temperature increases to 25°C (76°F), peaking at a maximum of 33°C (91°F). Precipitation also sees a significant uptick, with September receiving 84 mm (3.3 in) over 13 days, compared to only 25 mm (1.0 in) over 7 days in August. Additionally, humidity levels remain high in both months, but September's 70% is slightly lower than August’s 74%. For more detailed insights, you can check Yogyakarta weather in August.

Comparing the weather between September and October, we see a slight increase in minimum temperatures, with October starting at 19°C (67°F) versus September's 18°C (64°F). Both months maintain a consistent average temperature of around 25°C (76°F), but October experiences slightly lower maximum temperatures at 32°C (90°F) compared to 33°C (91°F) in September. However, October is notably wetter, with total precipitation rising to 162 mm (6.4 in) over 21 days, compared to September's 84 mm (3.3 in) over 13 days. Humidity levels are also marginally higher in October at 72%, compared to 70% in September. For a detailed look at temperatures and conditions, you can check out Yogyakarta weather in October.

In September, the weather is warm with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 33°C (91°F), accompanied by humidity levels around 70%. This month sees about 84 mm (3.3 in) of rainfall spread over 13 days, making it relatively drier compared to November. In contrast, November presents slightly warmer temperatures with a minimum of 21°C (70°F) and a maximum of 32°C (90°F), but it is significantly wetter, recording 382 mm (15.1 in) of precipitation over 27 days. The humidity increases marginally to 73%, resulting in a more humid atmosphere. For more detailed information, you can check Yogyakarta weather in November.

In September, the weather in Yogyakarta features a comfortable average temperature of 25°C (76°F), with daytime highs reaching up to 33°C (91°F) and relatively low precipitation of 84 mm (3.3 in) across 13 days. In contrast, December experiences warmer temperatures, with a minimum of 22°C (71°F) and an average of 26°C (79°F), but significantly higher rainfall of 364 mm (14.3 in) spread over 29 days. The humidity levels also increase slightly from September to December, rising from 70% to 75%. For more detailed insights, you can check Yogyakarta weather in December.

Compare Yogyakarta's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Yogyakarta

As September rolls into Yogyakarta, it brings a notable shift in weather characterized by warm temperatures and increased humidity. Compared to the drier months preceding it, September experiences more frequent rainfall, contributing to a lush environment. With average temperatures hovering around a pleasant 25°C (76°F), the city offers a comfortable climate, although the peaks can reach up to 33°C (91°F). The 70% humidity can make it feel a bit warmer, especially on the rainier days. Overall, September stands out as a transitional month, blending the remnants of the dry season with the onset of wet weather, making it an intriguing time to explore the rich culture and natural beauty of Yogyakarta. For detailed insights into the yearly weather patterns, visit Yogyakarta Climate.