Last updated: August 21, 2025
In September, Semarang, Indonesia experiences warm and humid weather, characterized by a maximum temperature soaring to 36°C (97°F) and an average of 28°C (83°F), providing a tropical ambiance. The minimum temperature drops to a comfortable 22°C (71°F), appealing to those who enjoy balmy evenings. While the month sees a total precipitation of 40 mm (1.6 in) over six days, the humidity remains high at 70%, creating a muggy yet vibrant atmosphere. This blend of heat and occasional rain presents a unique charm, making September an intriguing time to explore this coastal city.
September in Semarang, Indonesia, marks a transition into warmer temperatures, with minimums averaging around 22°C (71°F) and maximums peaking at 36°C (97°F). This month sees the continuing trend of higher averages, stabilizing at 28°C (83°F), which aligns closely with the sizzling temperatures of late summer. As the city prepares for the October heat, the rising temperatures signal a shift from the relatively cooler July and August. With warmth enveloping the region, September sets the stage for the tropical climate that Semarang is known for, inviting both locals and visitors to embrace the vibrant energy of this Indonesian gem.
In September, Semarang experiences a notable transition as it shifts from the drier months of July and August, which saw just 23 mm and 13 mm of rainfall respectively, to a more humid atmosphere with 40 mm of precipitation over approximately 6 days. This uptick in rainfall heralds the approach of the rainy season, contrasting sharply with the preceding months' limited showers. The increase in both intensity and frequency of rain lays the groundwork for the wetter months ahead, with October and November poised to deliver 120 mm and 294 mm respectively. As the dry spell weakens, September acts as a gentle reminder of nature's rhythm, preparing Semarang for the lush greenery and revitalizing rains that are characteristic of the upcoming season.
In Semarang, Indonesia, September marks a transition to more comfortable conditions as humidity levels drop to 70%. This decline follows a gradual decrease from the peak of 86% in February and fluctuating levels throughout the year. From August's 74%, the September humidity signifies a shift towards drier weather, continuing a trend that began mid-year. As the months progress towards October, the humidity rises slightly to 72%, but overall, the autumn months tend to offer a respite from the higher levels experienced earlier in the year. This trend emphasizes Semarang's tropical climate, where the wet season peaks in the first half of the year, making the latter months more inviting for outdoor activities.
In September, Semarang, Indonesia maintains its position within the extreme UV index category, with a notable rating of 13. This month continues the trend seen throughout the year, where most months experience relentless UV exposure, especially from January to April, where values peaked at 15. Remarkably, even the dip to 12 in May and August signifies high exposure levels, as the consistent burn time remains around 10 minutes across these months. As we transition into October, the UV index rises slightly, demonstrating the region's ongoing challenge with intense sunlight. For those looking to understand how best to prepare for sun exposure, more information can be found at Semarang UV Index.
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September in Semarang, Indonesia, is a delightful blend of warmth and sunshine, as the month boasts an impressive 307 hours of bright daylight. This positions it comfortably among the sunniest months, closely following July and August, both of which also shine with 317 hours each. The trend from June to September reveals a remarkable consistency in sunny days, making this period an ideal time for outdoor activities and exploration. As the year transitions into October, sunshine levels remain high at 312 hours, highlighting Semarang's climate as a prime destination for sunshine seekers. With these vibrant hours, September stands out not only for its warmth but also for its invitation to embrace the beauty of Indonesian culture under an abundant sun.
In Semarang, Indonesia, September presents a pleasant opportunity for sunshine, with a 31% chance of clear skies. This falls after the peak sunny months of July (52%) and August (43%), indicating a shift as the region transitions into the latter part of the year. The likelihood of sunny weather during this month reflects a gradual decrease, yet it remains substantially higher than the overcast conditions typical of the approaching rainy season in October (19%). As such, September is an ideal time to enjoy the lingering warmth of the dry season before the clouds roll in.
In Semarang, Indonesia, September marks a delightful shift in daylight duration, bringing back the familiar 12 hours of sunshine that the city enjoys at the beginning and end of the year. This lively return to longer days contrasts with the slightly shorter daylight hours experienced in the preceding months of April through August, where the sun lingered for just 11 hours. The dynamic pattern of daylight in Semarang reflects the region's tropical climate, showcasing a consistent balance between day and night throughout the year. As the days brighten again in September, residents and visitors alike can bask in nature's brilliance, setting the stage for the vibrant activities that this coastal city is known for.
As September unfolds in Semarang, Indonesia, the average wind speed hovers around 1.9 m/s (4 mph), marking a slight dip from the breezier summer months. This transition showcases a gentle shift in the coastal breezes, reminiscent of the easing summer heat, with the winds becoming more subdued compared to the higher speeds seen in February and August. Although September's winds are relatively calm, they still bring a refreshing touch amidst the tropical warmth, setting the stage for the upcoming months where a consistent softness in air movement lingers, heralding the transition into the wetter season ahead.
Weather in Semarang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Semarang, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather tends to be warmer with average temperatures reaching 28°C (83°F) and a maximum of 36°C (97°F), while experiencing relatively lower humidity at 70%. The month sees only 40 mm (1.6 in) of precipitation over 6 days, making it a drier time of the year. In contrast, January brings cooler temperatures with an average of 27°C (80°F) and a maximum of 32°C (90°F), but the humidity rises to 82%. Additionally, January is much wetter, receiving a significant 370 mm (14.6 in) of rain over 24 days. For more detailed information, you can check Semarang weather in January.
In September, the weather is typically warm and less humid, with temperatures ranging from a minimum of 22°C (71°F) to a maximum of 36°C (97°F) and an average of 28°C (83°F). The month sees about 40 mm (1.6 in) of rainfall over approximately 6 days, resulting in a more comfortable outdoor experience. In contrast, February brings higher humidity levels at 86% and a cooler average temperature of 26°C (80°F). However, February is also much wetter, with a substantial 395 mm (15.6 in) of precipitation spread over 28 days. For more details on the weather during this month, you can visit Semarang weather in February.
In comparing the weather between September and March, one can see notable differences in temperature and precipitation. September typically enjoys warmer temperatures, with a minimum of 22°C (71°F) and an average high of 36°C (97°F). It also experiences relatively low precipitation at 40 mm (1.6 in) over about 6 days, contributing to a humidity level of 70%. In contrast, March, while slightly cooler with a minimum of 23°C (73°F) and a maximum of 33°C (92°F), is much wetter, receiving 365 mm (14.4 in) of rain across 30 days, leading to higher humidity levels of 84%. This stark contrast highlights the shift from the drier heat of September to the more humid and rainy conditions typical of March. For more detailed information, check out Semarang weather in March.
In comparing the weather of September and April, both months feature a similar minimum temperature of around 22°C, but September tends to be warmer overall with an average temperature of 28°C compared to April's 27°C. While September experiences a more moderate precipitation total of 40 mm over just 6 days, April is considerably wetter, receiving 227 mm of rain across 26 days, leading to higher humidity levels of 80%. Thus, while September offers a drier and slightly hotter climate, April results in a much wetter and more humid experience. For more detailed information about April weather, you can check Semarang weather in April.
Comparing the weather in September and May reveals some notable differences. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 36°C (97°F), with an average of 28°C (83°F). The month sees about 40 mm (1.6 in) of precipitation over approximately 6 days and maintains a humidity level of 70%. In contrast, May experiences slightly warmer temperatures, with a minimum of 23°C (73°F), an average of 28°C (83°F), and a maximum of 34°C (94°F). Rainfall is more significant in May, totaling 86 mm (3.4 in) over 16 days, and humidity levels are higher at 81%. For more detailed insights into May weather, you can check out Semarang weather in May.
In comparing the weather of September and June, we find that September typically enjoys slightly warmer temperatures, with averages reaching 28°C (83°F) and a maximum of 36°C (97°F), while June has a comparable average temperature of 28°C (82°F), but peaks at 35°C (95°F). Precipitation levels are notably higher in June, accumulating 78 mm (3.1 in) over 11 days, compared to September's 40 mm (1.6 in) over just 6 days. Additionally, humidity is higher in June at 81%, whereas September maintains a lower humidity level of 70%. For more detailed insights into June weather conditions, you can visit Semarang weather in June.
When comparing the weather in September and July, it’s evident that both months maintain a similar average temperature of around 28°C (82°F), but September tends to be slightly warmer overall. The minimum temperature in September is 22°C (71°F), a degree higher than July's 20°C (68°F), and September's maximum can reach up to 36°C (97°F), compared to July's maximum of 35°C (95°F). Additionally, September experiences a higher level of precipitation at 40 mm (1.6 in) over 6 days, whereas July has only 23 mm (0.9 in) over 3 days. The humidity is also lower in September at 70%, compared to 78% in July. For more specific details about July weather, visit Semarang weather in July.
In comparing the weather between September and August, both months experience warm temperatures with average highs around 28°C (83°F). However, September sees slightly higher extremes, with a minimum temperature of 22°C (71°F) and a maximum reaching 36°C (97°F), compared to August's minimum of 20°C (68°F) and maximum of 35°C (96°F). Additionally, September is notably wetter, recording 40 mm (1.6 in) of precipitation over 6 days, while August had only 13 mm (0.5 in) over 2 days. Humidity levels are also slightly lower in September at 70%, compared to the 74% seen in August. For further details, you can check Semarang weather in August.
September typically sees slightly lower temperatures, with averages around 28°C (83°F) and a maximum of 36°C (97°F). It experiences less rainfall, totaling 40 mm (1.6 in) over about 6 days and a humidity level of 70%. In contrast, October brings warmer conditions, with an average temperature of 29°C (84°F) and a peak reaching 38°C (100°F). However, it's also wetter, receiving 120 mm (4.7 in) of precipitation over 14 days, coupled with a slight increase in humidity at 72%. For more details, you can check Semarang weather in October.
In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 36°C (97°F), with an average of 28°C (83°F). The month sees relatively low precipitation of 40 mm (1.6 in) over about 6 days, and humidity levels hover around 70%. In contrast, November experiences slightly warmer temperatures, with a minimum of 23°C (73°F) and a maximum reaching 37°C (99°F), while the average remains stable at 28°C (82°F). However, November is significantly wetter, with a substantial increase in precipitation to 294 mm (11.6 in) over 25 days and a higher humidity of 73%. For more details, you can check Semarang weather in November.
In September, the weather is characterized by warmer temperatures, with a minimum of 22°C (71°F) and an average of 28°C (83°F), reaching a maximum of 36°C (97°F). The month experiences relatively low precipitation levels of 40 mm (1.6 in) across just 6 days, and humidity is at 70%. In contrast, December's weather shows a slight increase in minimum temperature at 23°C (74°F) and an average of 27°C (81°F), with a maximum of 35°C (95°F). However, this month sees a significant rise in rainfall, totaling 375 mm (14.8 in) over 29 days, contributing to a higher humidity level of 75%. For more detailed weather information, you can visit Semarang weather in December.
As September unfolds in Semarang, the weather showcases a unique blend of warmth and moderate humidity. With temperatures reaching a maximum of 36°C (97°F), this month tends to feel particularly warm compared to the cooler and wetter months that follow. While the average temperature of 28°C (83°F) provides a comfortable threshold, -humidity levels hover around 70%, giving a subtropical feel that may surprise newcomers. Rainfall is relatively light, totaling about 40 mm (1.6 in) over just 6 days, making September a pleasant month for outdoor activities before the more significant downpours become the norm. For a more comprehensive look at Semarang's climate patterns throughout the year, visit Semarang Climate.