Last updated: August 21, 2025
September in Sepang, Malaysia offers a tropical climate characterized by warm temperatures and high humidity. With a maximum temperature reaching 34°C (93°F) and an average of 27°C (81°F), visitors can expect a consistently warm atmosphere. Nights bring a slight relief with a minimum temperature of 23°C (75°F). However, this month is marked by significant precipitation, with 237 mm (9.3 in) of rain spread over 25 rainy days, resulting in a humidity level hovering around an impressive 90%. Those planning to explore this vibrant region should be prepared for the occasional downpour amidst the tropical heat.
In September, Sepang, Malaysia experiences a subtle shift in temperatures, reflecting the region's tropical climate. The minimum temperature hovers around 23°C (75°F), offering a comfortable start to the day, while the average remains steady at 27°C (81°F). As the sun climbs higher, maximum temperatures can soar to 34°C (93°F), similar to earlier months. This slight dip in both minimum and average temperatures compared to the peak summer months signals the onset of a gradual transition toward the end of the dry season. Despite this, the warm, humid days continue to characterize the vibrant atmosphere of Sepang, making it an intriguing destination for those seeking to bask in the tropical heat.
In September, Sepang, Malaysia experiences a notable peak in precipitation, with an impressive 237 mm (9.3 in) of rainfall over the month, marking it as one of the wettest times of the year. This increase follows the rainfall patterns established in the previous months, demonstrating a gradual climb in precipitation from January's 138 mm to August's 162 mm. Interestingly, September also shares its total with the rainfall seen in October, indicating that the region remains under the influence of the southwest monsoon. With rain recorded on 25 days, the month offers a persistent backdrop of moisture, continuing into the heavier deluge of November, which often sees the highest totals of the year. The trend illustrates a rhythm of rainfall that defines the tropical climate of this region, reinforcing its lush landscapes and vibrant ecosystems.
In September, the humidity in Sepang, Malaysia peaks at a notable 90%, mirroring the patterns seen in the previous month. This high level of moisture in the air marks the tail end of a humid season that begins ramping up as early as May. From an initial 84% in January, humidity steadily climbs, reaching a crescendo in August and September before tapering off slightly in the following months. This consistent trend of heightened humidity not only characterizes the tropical climate of Sepang but also indicates the challenges residents and visitors face in finding relief from the oppressive heat. As we transition into October, humidity remains elevated at 89%, ensuring that the tropical blanket continues well into the fall.
In September, the UV Index in Sepang, Malaysia, remains consistently high at 14, categorizing it as extreme with a burn time of just 10 minutes—a trend that persists throughout much of the year. From January to August, the UV Index hovers between 12 and 15, underscoring the region's intense sun exposure. As September rolls in, the UV levels are steady, mirroring those in the preceding months and indicating that outdoor enthusiasts should remain vigilant and adequately protected from the sun's harmful rays. This trend continues into October and November, where similar UV levels are recorded, ensuring that safety precautions are paramount. For more detailed information on UV levels, visit Sepang UV Index.
UV Risk Categories
In September, Sepang, Malaysia, enjoys an impressive average of 294 hours of sunshine, continuing the trend of abundant sunlight that characterizes the region throughout the year. While March stands out with the highest sunshine at 326 hours, September maintains a vibrant glow, just a shade below the summer months of July and August. Notably, the sunshine hours during this month highlight the region's consistent warmth, especially compared to the cooler, cloudier days of November and December. This perfect blend of sunshine makes September an ideal month to explore Sepang's beautiful landscapes and cultural richness under the radiant Malaysian sun.
In Sepang, Malaysia, the likelihood of sunny weather in September hovers at a modest 16%, reflecting a slight uptick from the preceding months, which generally experience lower sunshine probabilities. While the summer months of June and July see chances dipping to around 13%, September offers a faint glimmer of hope for sun-seekers, just above the seasonal average. This trend suggests that as the region transitions towards the end of the year, there’s a slight resilience in sunny spells, making September a potentially interesting time for outdoor activities. However, travelers should remain prepared, as the overall chance of brightness is still quite limited.
In September, Sepang, Malaysia enjoys a consistent daylight duration of 12 hours, seamlessly aligning with the preceding months of April through August. This steady availability of sunlight enhances the vibrant atmosphere, making it an ideal time for both outdoor activities and cultural experiences. As the year progresses towards October, this balance in daylight continues, reflecting Malaysia's equatorial climate where daylight hours remain largely uniform year-round. The gradual decline in daylight towards November, paired with the shorter days of January and December, highlights the region's unique climatic rhythm, where the lush landscape thrives amidst the abundant sunshine.
In September, Sepang experiences a gentle breeze with an average wind speed of 1.9 m/s (4 mph), mirroring the calm conditions of the preceding summer months. This steady airflow, characteristic of the region, provides a pleasant respite from the tropical heat. As the year progresses, wind speeds show a slight increase in early autumn, peaking at 2.2 m/s (5 mph) in October, before settling back to a consistent tempo in the following months. Overall, September’s breezy charm encapsulates the transitional period leading into the livelier winds of October, inviting both locals and visitors to revel in the serene atmosphere.
Weather in Sepang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sepang, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit similar temperature ranges, with both months featuring a minimum of 22-23°C (73-75°F) and a maximum of 34°C (93°F). However, September is marked by significantly higher precipitation, with 237 mm (9.3 in) falling over 25 days, compared to January's 138 mm (5.4 in) over just 17 days. This results in higher humidity in September at 90%, compared to January's 84%. For a more in-depth look at January weather conditions, you can visit Sepang weather in January.
September and February exhibit similarities in temperature, with both months having a minimum temperature around 23°C (75°F) and maximum temperatures peaking at 34°C (93-94°F). However, September tends to be more humid and rainy, averaging 90% humidity and experiencing 237 mm (9.3 in) of precipitation over 25 days, compared to February's lower humidity of 77% and significantly reduced rainfall of 85 mm (3.4 in) over just 15 days. This makes February a drier and slightly more comfortable month for outdoor activities. For more details, you can check Sepang weather in February.
The weather in September and March exhibits notable similarities and differences. In September, temperatures range from a minimum of 23°C (75°F) to a maximum of 34°C (93°F), with an average of 27°C (81°F). However, it is also characterized by high humidity at 90% and significant precipitation, totaling 237 mm (9.3 in) over 25 days. In contrast, March sees slightly warmer temperatures, with a minimum of 24°C (75°F) and a maximum of 35°C (95°F), averaging 28°C (82°F). Rainfall is less in March, at 191 mm (7.5 in) over 24 days, and humidity is lower at 77%. The overall feel is somewhat drier and warmer in March. For more details on the weather conditions, visit Sepang weather in March.
Comparing the weather in September and April reveals some interesting similarities and differences. Both months feature warm temperatures, with September recording a minimum of 23°C (75°F) and an average of 27°C (81°F), while April has a slightly higher minimum of 24°C (76°F) and an average of 28°C (82°F). In terms of extremes, both months peak at a maximum temperature of around 34°C (93°F in September and 94°F in April). Precipitation levels are quite comparable, with September receiving 237 mm (9.3 in) over 25 days, while April sees 234 mm (9.2 in) spread across 27 days. Interestingly, humidity levels are higher in September at 90%, compared to 80% in April. For more detailed insights into April weather, you can check out Sepang weather in April.
When comparing September and May weather, both months exhibit warm temperatures with only slight variations. September features a minimum temperature of 23°C (75°F), an average of 27°C (81°F), and a maximum of 34°C (93°F). In contrast, May has a slightly higher minimum of 24°C (75°F), an average of 28°C (83°F), and a maximum of 33°C (92°F). Precipitation levels are also comparable, with September receiving 237 mm (9.3 in) over 25 days, while May has 235 mm (9.2 in) over 28 days. Humidity levels are high in both months, but September is slightly more humid at 90%, compared to May’s 85%. For more details on May weather, you can check Sepang weather in May.
In September, the weather features slightly higher temperatures with a minimum of 23°C (75°F) and an average of 27°C (81°F), peaking at 34°C (93°F). This month also experiences significantly higher rainfall, accumulating 237 mm (9.3 in) over 25 days, coupled with high humidity levels at 90%. In contrast, June sees a minimum temperature of 24°C (75°F) and an average of 28°C (82°F), with a maximum of 33°C (91°F). Rainfall during June is less intense, totaling 156 mm (6.1 in) across 24 days, and slightly lower humidity at 87%. For more detailed insights into June's weather, visit Sepang weather in June.
When comparing the weather in September and July, we see that September has slightly higher humidity levels at 90% compared to July's 87%. September also experiences a wider range of temperatures, with an average temperature of 27°C (81°F), while July has a slightly higher average of 28°C (82°F). Precipitation is significantly greater in September, totaling 237 mm (9.3 in) over 25 days, compared to July's 166 mm (6.5 in) over 23 days. For more detailed information, check out Sepang weather in July. Overall, both months have warm temperatures, but September tends to be wetter and more humid.
In comparing the weather between September and August, both months display a high level of humidity at 90%, but noteworthy differences emerge in temperature and precipitation. September experiences slightly lower minimum and average temperatures, with a minimum of 23°C and an average of 27°C, compared to August's minimum of 24°C and average of 28°C. However, September also sees an increase in maximum temperatures, reaching up to 34°C, whereas August peaks at a cooler 32°C. Precipitation is notably higher in September, with 237 mm over 25 days, compared to August's 162 mm, also spread over 25 days. For more detailed information, you can check Sepang weather in August.
In September, the weather is characterized by warm temperatures with a minimum of 23°C (75°F) and an average of 27°C (81°F), peaking at a maximum of 34°C (93°F). With 237 mm (9.3 in) of precipitation spread over 25 days, humidity remains high at around 90%. In contrast, October experiences slightly warmer nights with a minimum of 24°C (75°F) and a comparable average of 27°C (82°F), while the maximum temperature decreases slightly to 33°C (92°F). The month sees a slightly reduced precipitation level of 233 mm (9.2 in) over 24 days, bringing humidity down to 89%. For more detailed insights, you can check Sepang weather in October.
In September, the weather features temperatures ranging from a minimum of 23°C (75°F) to a maximum of 34°C (93°F), with an average of 27°C (81°F). This month also sees significant rainfall, accumulating to 237 mm (9.3 in) over 25 days, accompanied by high humidity levels of 90%. In contrast, November experiences slightly warmer nighttime temperatures, with a minimum of 24°C (75°F) and a max of 33°C (91°F), while retaining the same average of 27°C (81°F). However, it is marked by increased precipitation, totaling 312 mm (12.3 in) over 29 days and a marginally lower humidity of 89%. For more details, you can check Sepang weather in November.
In September, the weather features a warm climate with temperatures ranging from a minimum of 23°C (75°F) to a maximum of 34°C (93°F), and while the average temperature stays at 27°C (81°F), it experiences significant rainfall with 237 mm (9.3 in) over approximately 25 days. In contrast, December sees very similar temperatures, with a minimum of 24°C (75°F) and a maximum of 33°C (91°F), while still averaging at 27°C (81°F). The precipitation slightly decreases to 234 mm (9.2 in) but occurs over a few more days, totaling 27. Despite these differences, both months share a high humidity level of 90%. For more detailed information on December weather, you can visit Sepang weather in December.
As September rolls into Sepang, the weather becomes notably more humid, with an average temperature that remains warm yet comfortable enough for outdoor activities. While temperatures can peak at a sizzling 34°C, the substantial rainfall—spanning nearly 25 days—contributes to the region's lush greenery. This month stands out for its high humidity levels, dipping into sultry evenings amid the frequent, refreshing showers. Visitors can expect a tropical climate that ebbs and flows, making it distinctively vibrant compared to the more stable conditions of other months. For a deeper dive into how the weather evolves throughout the year, check out Sepang Climate.