Last updated: August 21, 2025
In September, Jepun, Indonesia, experiences a tropical climate characterized by warm temperatures and a sprinkle of rain. With maximum highs reaching 33°C (92°F) and a comfortable average of 25°C (77°F), this month provides an inviting atmosphere for outdoor activities. The minimum temperature dips to around 17°C (63°F) at night, adding a refreshing chill to the evenings. Although precipitation totals about 30 mm (1.2 in) over the month, rainfall is typically brief, occurring on approximately 6 days and contributing to the region's lush landscape. The humidity level sits at a notable 77%, enhancing the tropical feel and making it essential for visitors to stay hydrated while enjoying the vibrant surroundings.
In September, Jepun, Indonesia experiences a delightful transition, with temperatures ranging from a cool 17°C (63°F) at night to a warm 33°C (92°F) during the day. The average temperature settles at a comfortable 25°C (77°F), making it an inviting month for visitors seeking warmth without the oppressive summer heat. This period marks a slight increase from the cooler months of July and August, where temperatures dipped to a minimum of 17°C (62°F) and 64°F (18°C), yet it maintains a pleasant climate, perfect for exploring the lush landscapes or enjoying the vibrant local culture. As the month progresses, the temperatures begin to rise gradually, hinting at the balmy conditions of October and beyond. September's balance of mild nights and warm days offers an ideal backdrop for adventure and relaxation alike.
In September, Jepun, Indonesia experiences a notable shift in its precipitation patterns, as the total rainfall dips to 30 mm (1.2 in) over 6 days. This marks a significant reduction compared to the heavy rains of earlier months, particularly in January and February, where the region sees much higher totals of 316 mm (12.4 in) and 370 mm (14.6 in) respectively. By September, the downpours of the dry season ease, making way for a glimpse of drier weather, a sharp contrast to November, which anticipates a return to heavier rains with 264 mm (10.4 in) expected over many more days. Overall, September serves as a transitional month in Jepun's climate, where infrequent rains foreshadow the wetter months ahead.
In September, the humidity in Jepun, Indonesia drops to 77%, marking a slight decline that reflects a broader trend of gradually decreasing moisture levels as the year progresses. Following the typically humid months of January through May, which consistently boast humidity percentages above 80%, June and July see a gentle easing as levels dip to 81% and 79%. By the time September arrives, this reduction becomes more pronounced, suggesting a shift towards a drier climate as the region transitions into the latter part of the year. Interestingly, the relatively stable humidity between August and October, both at 77%, hints at a consistent pattern in the early fall season, setting the stage for the shifting weather dynamics as Jepun heads into November and December.
In September, Jepun, Indonesia, experiences a UV Index of 15, categorizing the exposure as extreme, with a burn time of only 10 minutes. This marks a return to the intensity seen earlier in the year, reminiscent of the peak values observed in both January and February. The trend throughout the year showcases consistently high UV levels, with the index frequently hitting 15 during the last quarter. Even as the month transitions towards the end of the year, the UV Index remains a notable factor for outdoor enthusiasts. Always take precautions under the Indonesian sun! For more details, visit Jepun UV Index.
UV Risk Categories
September in Jepun, Indonesia, ushers in a delightful shift in sunshine, with 303 hours of golden rays illuminating the month. Building on the peak summer glow of July and August, which recorded impressive hours of sunshine at 311 and 313 respectively, September continues to bask in ample daylight. Following the trend of increasing sunlight as the year progressed, this month still enjoys the lingering warmth of summer, albeit with a gentle decline leading into the cloudier months ahead. As the sun begins its gradual retreat into autumn, September stands as a lovely bridge, promising warm days and vibrant sunsets, before the cooler months settle in.
In September, Jepun, Indonesia experiences a 25% chance of sunny weather, presenting a shift from the sunnier months of July and August, where probabilities hovered around 42% and 38%, respectively. While September's forecast indicates a dip in sunshine, the likelihood remains favorable compared to the following months, October and November, which plummet to 17% and 6%. This transitional period signifies the tail end of dry season, as the region prepares for the return of rainy days. Therefore, if you're planning a visit in September, you'll still have a decent chance of soaking up some sun before the wet season fully sets in.
In Jepun, Indonesia, the daylight duration presents an interesting rhythm throughout the year. From January to March, the days are consistently bright, offering a delightful 12 hours of sunlight. As April rolls in, there is a subtle decline to 11 hours, a trend that continues through the warm months of May, June, July, and August. However, a refreshing shift occurs in September, bringing back 12 hours of daylight, a pattern that remains steady until the end of the year. This cyclical variation not only enhances the outdoor experience but also beautifully reflects the region's climatic charm as it transitions between longer and shorter days.
As September rolls into Jepun, Indonesia, the winds offer a gentle yet invigorating breeze, averaging 2.2 m/s (5 mph). This marks the tail end of a gradual increase in wind speed, which began notably in July with a shift to 2.0 m/s (4 mph) and continued to strengthen in August, reaching 2.3 m/s (5 mph). The trend suggests a transition into the breezier months of the year, inviting both nature enthusiasts and adventurers to revel in outdoor activities. Following September, the winds hold steady, hinting at a balanced climate conducive to exploration and enjoyment of Jepun’s stunning landscapes.
Weather in Jepun varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jepun, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinct weather patterns in terms of temperature and precipitation. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 33°C (92°F), with an average of 25°C (77°F) and relatively low precipitation of 30 mm (1.2 in) over 6 days. The humidity level sits at 77%, contributing to a warm yet comfortable atmosphere. In contrast, January is warmer overall with minimum temperatures of 21°C (71°F) and maximums peaking at 34°C (93°F), averaging 26°C (79°F). However, it experiences significantly higher rainfall, totaling 316 mm (12.4 in) over 25 days, which raises the humidity slightly to 81%. For more insights on January weather, you can check Jepun weather in January.
In September, the weather is generally warm with temperatures ranging from a minimum of 17°C (63°F) to an average of 25°C (77°F) and a maximum of 33°C (92°F). This month experiences relatively low precipitation, totaling 30 mm (1.2 in) over about six days, and with humidity at 77%, it feels quite comfortable. In contrast, February brings slightly warmer temperatures with a minimum of 22°C (71°F) and an average of 26°C (79°F), peaking at 34°C (93°F). However, February sees significantly more rainfall, accumulating 370 mm (14.6 in) across 27 days and higher humidity at 85%, resulting in a more humid and wetter climate. For more detailed insights into February weather, you can check out Jepun weather in February.
In comparing the weather of September and March, September typically presents more moderate temperatures, with a minimum of 17°C (63°F), an average of 25°C (77°F), and a maximum of 33°C (92°F). The month experiences relatively low precipitation at 30 mm (1.2 in) over about six days, and humidity levels average around 77%. In contrast, March tends to be warmer, starting with a higher minimum temperature of 21°C (71°F) and an average temperature of 26°C (80°F), while still reaching up to 33°C (92°F). However, March is also significantly wetter, with a staggering 294 mm (11.6 in) of rain spread across 30 days and an increase in humidity to 83%. For more detailed information about March weather, you can check Jepun weather in March.
In comparing the weather of September and April, we find notable contrasts. September typically enjoys milder temperatures, with a minimum of 17°C (63°F) and an average of 25°C (77°F), along with relatively low precipitation at 30 mm (1.2 in) over just 6 days. In contrast, April tends to be warmer, with minimum temperatures of 20°C (68°F) and an average of 27°C (80°F). However, it also sees significantly higher rainfall, totaling 166 mm (6.5 in) across 23 days, leading to a slightly higher humidity level of 80%. For a more detailed view of April weather patterns, you can refer to this link: Jepun weather in April.
In comparing the weather of September and May, both months experience similar maximum temperatures, reaching up to 33°C (92°F). However, September has a slightly lower average temperature of 25°C (77°F) compared to May's 26°C (79°F). Precipitation is more prevalent in May, with 62 mm (2.4 in) occurring over 11 days, whereas September sees only 30 mm (1.2 in) over 6 days. Additionally, humidity levels are marginally higher in May at 82%, compared to 77% in September. For more detailed information, you can visit Jepun weather in May.
In comparing the weather between September and June, both months exhibit similar temperature ranges, with minimums at 17°C (63°F), average temperatures around 25°C (77°F), and maximums reaching 33°C (92°F). However, June experiences slightly higher precipitation, with 46 mm (1.8 in) over 9 days, compared to September's 30 mm (1.2 in) over 6 days. Additionally, June has a marginally higher humidity level at 81%, while September's humidity sits at 77%. For more detailed information, you can check Jepun weather in June.
When comparing the weather in September and July, September tends to be slightly warmer, with an average temperature of 25°C (77°F) compared to July's 24°C (76°F). While both months share similar minimum temperatures, September reaches a higher maximum of 33°C (92°F) compared to July’s 32°C (90°F). In terms of precipitation, September experiences more rainfall with 30 mm (1.2 in) over 6 days, whereas July sees only 13 mm (0.5 in) over 3 days, making it the drier month. Humidity levels are quite similar, with September at 77% and July slightly higher at 79%. For a detailed look at the weather conditions in July, you can check Jepun weather in July.
In comparing the weather between August and September, September experiences slightly warmer average temperatures, with a daily average of 25°C (77°F) compared to August's 24°C (76°F). Both months start with a minimum temperature of around 17°C, but September reaches a higher maximum of 33°C (92°F) versus August's 32°C (89°F). Precipitation also varies, with September receiving more rain at 30 mm (1.2 in) over 6 days, while August has a total of 14 mm (0.6 in) over just 3 days. Humidity levels are relatively similar, with September at 77% and August at 79%. For further insights on August weather, you can refer to the following link: Jepun weather in August.
In September, the weather is characterized by warm temperatures, with a minimum of 17°C (63°F) and a maximum of 33°C (92°F), while averaging around 25°C (77°F). The month sees relatively low precipitation, totaling 30 mm (1.2 in) over just 6 days, alongside a consistent humidity level of 77%.
In contrast, October experiences slightly warmer temperatures, with a minimum of 20°C (68°F) and a maximum of 34°C (94°F), averaging 26°C (79°F). However, it also brings a notable increase in precipitation, amounting to 81 mm (3.2 in) over 13 days, while humidity remains stable at 77%. For more details on October weather, you can refer to this link: Jepun weather in October.
In September, the weather is generally warm with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 33°C (92°F), averaging around 25°C (77°F). With only 30 mm (1.2 in) of precipitation occurring over 6 days, the month is relatively drier, although humidity remains high at 77%. In contrast, November sees a noticeable increase in both temperature and rain. The minimum temperature rises to 20°C (68°F), while the maximum reaches up to 35°C (95°F), averaging 26°C (80°F). However, the precipitation dramatically increases to 264 mm (10.4 in) over 26 days, and humidity remains constant at 78%. For a detailed overview of the November weather, you can check Jepun weather in November.
In September, the weather is characterized by milder temperatures, with a minimum of 17°C (63°F) and an average of 25°C (77°F), peaking at 33°C (92°F). Precipitation is relatively low, totaling 30 mm (1.2 in) across about 6 rainy days, while humidity remains at a consistent 77%. Conversely, December brings warmer temperatures, with minimums of 20°C (68°F), an average of 27°C (80°F), and maximums soaring to 36°C (98°F). However, this month also sees significantly higher rainfall, accumulating 282 mm (11.1 in) over 27 days, maintaining the same high humidity level of 77%. For those interested in more detailed weather patterns, check out Jepun weather in December.
As September rolls in, Jepun experiences a shift in its weather, marked by a delightful balance of warmth and moisture. Compared to the hotter summer months, temperatures cool slightly, averaging a comfortable 25°C, making it perfect for outdoor activities. The humidity remains high at 77%, creating a lush, vibrant atmosphere, while occasional rain brings refreshing relief, with precipitation occurring on just a handful of days. This blend of conditions not only enhances the natural beauty of the area but also offers a welcome respite from the intense heat of July and August. For further insights into what to expect throughout the year, check out Jepun Climate.