Last updated: August 21, 2025
In September, Kupang, Indonesia experiences a warm climate characterized by a maximum temperature reaching up to 36°C (98°F) and an average of 28°C (83°F), providing ideal conditions for outdoor activities. The minimum temperature rarely drops below 20°C (68°F), ensuring comfortable evenings. With an impressively low precipitation amount of just 3 mm (0.1 in) across 0 rainy days, the month boasts predominantly dry and sunny weather, complemented by a humidity level of 74%. This combination creates a delightful environment for residents and visitors alike to enjoy the vibrant atmosphere of Kupang.
In September, Kupang, Indonesia, experiences a delightful transition towards warmer days, with temperatures typically ranging from a minimum of 20°C (68°F) to a maximum of 36°C (98°F). The average temperature hovers around 28°C (83°F), reflecting a gradual rise from the cooler months of July and August. As the region moves closer to the end of the dry season, you can expect sunny skies and increased warmth, signaling the approach of the more intense heat typical of late year. This combination of mild evenings and warm afternoons creates an inviting climate, perfect for exploring the vibrant local culture and stunning landscapes that Kupang has to offer.
In September, Kupang, Indonesia experiences a significant drop in precipitation, with only 3 mm (0.1 in) recorded and precisely 0 days of rainfall. This marks a sharp contrast to the preceding months, where heavy rains were prevalent, especially in January and February, when the region saw 266 mm and 233 mm respectively, accompanied by numerous wet days. As the dry season continues through August, September maintains this trend of minimal rainfall, making it one of the driest months of the year. This pattern shifts again in October as the region begins to transition back to wetter conditions, highlighting the distinct seasonal fluctuations in Kupang's climate.
In Kupang, Indonesia, September marks a notable point in the seasonal humidity cycle, averaging 74%, which aligns with the relatively stable humidity levels seen in the preceding months of August and October. After a peak in the early part of the year, where humidity levels soared to 82% in February and March, a gradual decline emerges, culminating in the more moderate figures of late summer and early autumn. The trend indicates a transition towards drier conditions as the year progresses, especially as humidity dips from a high of 77% in January to a low of 71% in July, before settling in the mid-70s for the final months of the year. This steady decrease, along with the consistent weather patterns, makes September a comfortable point in Kupang's tropical climate.
In September, the UV Index in Kupang, Indonesia reaches a striking 15, reaffirming its status within the extreme exposure category. As the month transitions from the peak of the dry season, the intense sun offers little respite, with a burn time of just 10 minutes for unprotected skin. This trend of high UV levels is consistent throughout the year; every month from January to August boasted similarly extreme readings, with only a slight dip in May and June that still classified as very high. As we move into the latter part of the year, the index remains steadfastly extreme, reinforcing and highlighting the need for diligent sun protection. For more detailed insights, visit Kupang UV Index.
UV Risk Categories
As September rolls into Kupang, the city basks in an impressive 312 hours of sunshine, marking it as a continuation of the vibrant summer months. This month, just shy of August's peak, showcases the steady trend of abundant sunlight that has been building since the start of the year. From 231 hours in January to a dazzling 330 hours in October, each month has progressively embraced brighter days, creating a delightful atmosphere for both residents and travelers. The consistent rise in sunshine not only enhances the stunning coastal views but also sets the perfect backdrop for outdoor adventures, affirming Kupang's reputation as a sun-kissed paradise.
In Kupang, Indonesia, September presents a moderate 51% chance of sunny weather, making it one of the more favorable months for sunlight after the peak summer months of July and August. Notably, there's a significant increase in sunny days beginning in April, where the percentage jumps from a mere 13% in March to an impressive 49%. This upward trend culminates in August, the sunniest month at 69%, before experiencing a slight decline by September. As the year progresses towards the end, the likelihood of sunshine decreases, highlighting September as an ideal transitional month. With its blend of sun and pleasant temperatures, September is a perfect time for visitors to enjoy the natural beauty of Kupang.
In September, Kupang, Indonesia, enjoys a delightful return to 12 hours of daylight, mirroring the consistency seen in the earlier months of the year. This shift marks a transition from the slightly shorter 11-hour days of the mid-year, as both April through August exhibit a steady reduction in daylight. The balance of light and dark is restored, setting the stage for longer days ahead in the following months. The rhythmic pattern of daylight in Kupang not only highlights the region’s equatorial charm but also invites residents and visitors to bask in the sun’s warm embrace as the year begins to change.
In September, Kupang, Indonesia, experiences an invigorating breeze with an average wind speed of 4.4 m/s (10 mph), marking a slight dip from the stronger currents of August at 4.8 m/s. This month continues a trend of increasing winds from the calmer beginning of the year, where speeds hovered around 2.9 to 3.3 m/s. As the region transitions into the last quarter of the year, September's winds serve as a reminder of the island's dynamic climate, promising a blend of refreshing outdoor experiences before the approaching lull in October. Notably, this period showcases the island's vibrant maritime lifestyle, powered by the gentle yet persistent winds that weave through its enchanting scenery.
Weather in Kupang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kupang, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is quite warm with minimum temperatures around 20°C (68°F) and averages reaching 28°C (83°F), peaking at 36°C (98°F). The month experiences minimal precipitation, averaging only 3 mm with no rainfall days and a humidity level of 74%. In contrast, January brings slightly cooler temperatures, with a minimum of 24°C (75°F) and an average of 27°C (81°F), though it remains warm with a maximum of 33°C (92°F). However, January is significantly wetter, with 266 mm (10.5 in) of rain spread over 24 days, and a humidity level of 77%. For a more detailed look at the weather in January, check out Kupang weather in January.
In comparing the weather between September and February, September boasts a warmer climate with average temperatures ranging from a minimum of 20°C (68°F) to a maximum of 36°C (98°F). With only 3 mm of precipitation and humidity around 74%, it is a relatively dry month. In contrast, February experiences slightly cooler temperatures, with a minimum of 23°C (74°F) and a maximum of 33°C (91°F). It is significantly wetter, receiving 233 mm of rainfall over 26 days, leading to higher humidity levels at 82%. This stark difference highlights September's dryness versus the rainy and humid conditions typical of February. For more detailed information, you can check Kupang weather in February.
In September, the weather is typically warm and dry, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 36°C (98°F) and an average of 28°C (83°F). The humidity sits at 74%, and there is virtually no precipitation, making it a pleasant time to enjoy outdoor activities. In contrast, March experiences higher humidity at 82% and significantly more rainfall, with a staggering 238 mm (9.4 in) of precipitation over 28 days. The temperatures in March are also milder, ranging from a minimum of 23°C (74°F) to a maximum of 33°C (92°F) and averaging 27°C (82°F). For more details on March weather, you can check Kupang weather in March.
In September, the weather is characterized by warmer temperatures, with a minimum of 20°C (68°F) and an average high of 36°C (98°F). This month sees very little precipitation, averaging just 3 mm (0.1 in) over no rainy days, and a moderate humidity level of 74%. In contrast, April presents a slightly cooler minimum temperature of 22°C (72°F) and maintains a similar average high of 36°C (96°F). However, it is significantly wetter, experiencing 144 mm (5.7 in) of rain spread over 12 days, along with a higher humidity of 80%. For more detailed insights into April weather, you can check this link: Kupang weather in April.
In comparing the weather of September and May, we find that both months experience similar average temperatures of 28°C (83°F), but September tends to have slightly lower minimum and maximum temperatures. September's temperature range spans from a minimum of 20°C (68°F) to a maximum of 36°C (98°F), while May starts at 23°C (73°F) and peaks at 35°C (95°F). Additionally, May sees more rainfall, with 18 mm (0.7 in) over three days, while September remains dry with no recorded precipitation. Humidity levels are also higher in May at 80%, compared to 74% in September. For more detailed information, you can check Kupang weather in May.
In September, the weather features a comfortable minimum temperature of 20°C (68°F) while averaging around 28°C (83°F), with a maximum reaching 36°C (98°F). The month enjoys minimal precipitation, recording only 3 mm (0.1 in) over 0 days, and maintaining a humidity level of 74%. In contrast, June starts slightly warmer with a minimum temperature of 21°C (70°F) and averages 27°C (82°F), peaking at 35°C (95°F). June experiences slightly more precipitation at 5 mm (0.2 in) over just 1 day, while humidity is relatively comparable at 75%. For more detailed insights into June's weather, you can visit Kupang weather in June.
In September, the weather is generally warmer compared to July, with minimum temperatures averaging around 20°C (68°F) and maxima reaching up to 36°C (98°F), while July experiences slightly cooler temperatures with a minimum of 21°C (69°F) and a maximum of 34°C (93°F). Both months see very little precipitation, with September receiving only 3 mm (0.1 in) and July recording a mere 2 mm (0.1 in), contributing to dry conditions in both months. Additionally, September has a higher humidity level at 74%, compared to July's 71%, making the air feel slightly more humid and warm as summer transitions into fall. For more details, you can check Kupang weather in July.
In September, the weather is slightly warmer than in August, with minimum temperatures starting at 20°C (68°F) compared to August's 21°C (69°F). The average temperature rises to 28°C (83°F) in September, while August maintains a cooler average of 27°C (81°F). Additionally, September sees a maximum temperature of 36°C (98°F), surpassing August's peak of 34°C (94°F). Both months share the same low precipitation of 3 mm (0.1 in) and no rainy days, with humidity levels remaining consistent at 74%. For more details on August's climate, check out Kupang weather in August.
In September, the weather is marked by warm temperatures, with a minimum of 20°C (68°F) and an average of 28°C (83°F), peaking at a hot 36°C (98°F). The month is characterized by very little precipitation, recording just 3 mm with no rainy days, and maintaining a humidity level of 74%. In contrast, October sees a slight increase in temperatures, with minimums rising to 22°C (72°F) and average highs of 29°C (85°F), while still reaching up to 36°C (97°F). However, October brings more rainfall, accumulating 15 mm over four days, while humidity remains consistent at 74%. For more details on October weather, you can check Kupang weather in October.
In comparing the weather between September and November, September generally boasts warmer temperatures, with averages around 28°C (83°F) and a maximum of 36°C (98°F), while also experiencing significantly less precipitation, with only 3 mm (0.1 in) of rain and no rainy days. In contrast, November sees a slight increase in minimum temperatures, with averages of 30°C (85°F) and a maximum reaching up to 38°C (100°F). However, this month is characterized by a substantial rise in rainfall, totaling 117 mm (4.6 in) over 14 days, creating a more humid environment with a humidity level around 73%. For more detailed weather insights, you can visit Kupang weather in November.
In September, the weather is typically warm and dry, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 36°C (98°F) and an average of 28°C (83°F). This month sees practically no precipitation, making it an ideal time for outdoor activities, with humidity levels around 74%. In contrast, December experiences a shift to much wetter conditions, with temperatures only slightly cooler, ranging from a minimum of 23°C (74°F) to a maximum of 35°C (96°F), while still averaging 28°C (83°F). December brings significant rainfall, totaling 256 mm (10.1 in) over 26 rainy days, with humidity slightly lower at 72%. For detailed insights into December weather, visit Kupang weather in December.
As September rolls in, Kupang experiences a delightful peak in warmth, characterized by pleasantly high temperatures and notably low precipitation, which sets it apart from the wetter months. With abundant sunshine and minimal rainfall, this month offers an ideal climate for outdoor activities and exploration. The 74% humidity, while noticeable, adds to the tropical feel, making the evenings particularly enjoyable. For those looking to understand more about the distinctive weather patterns throughout the year, visit Kupang Climate for a comprehensive overview.