Last updated: August 21, 2025
In September, Penang, Indonesia, experiences a tropical climate characterized by mild temperatures, with daily highs reaching 28°C (84°F) and lows around 20°C (68°F), averaging 24°C (76°F). The weather is marked by high humidity levels at 71%, contributing to a sticky atmosphere. Rain is a frequent visitor this month, with a total precipitation of 66 mm (2.6 in) spread across approximately 16 days, making it one of the wetter months of the year. Whether planning outdoor activities or seeking refuge indoors, visitors should prepare for the dynamic weather as they explore the vibrant culture of Penang.
In Penang, Indonesia, September sees a mild transition from the cooler months of August. The temperatures begin to rise slightly, with minimums hovering around 20°C (68°F) and averages settling at 24°C (76°F), offering a comfortable atmosphere for both locals and visitors. The maximum temperature reaches a pleasant 28°C (84°F), making it a great time to explore the island's vibrant culture and stunning landscapes. Compared to the previous months, this uptick signals the start of a warmer end to the year, yet the climate remains gentle, with humidity levels still manageable. As the island gears up for the rainy season, September's temperatures provide an ideal backdrop for enjoying outdoor activities before the heavier rains begin.
September brings a slight dip in rainfall to Penang, Indonesia, with precipitation amounting to 66 mm (2.6 in), making it one of the drier months in comparison to earlier in the year. This month sees rainfall spread over 16 days, maintaining a consistent rhythm of occasional showers typical for the region. As the dry season approaches, the trend shows a significant reduction from the heavy downpours of previous months, particularly from January to March, which often exceed 350 mm. Looking ahead, the precipitation begins to rise again in October and November, hinting at the return of the wetter season. This seasonal shift not only influences local ecosystems but also provides a welcome respite for those eager to bask in drier, sunnier days.
In September, Peneng experiences a dip in humidity, reaching 71%, which is part of a gradual decline observed from the summer months. Following a high of 84% in February, the region has seen a steady decrease, with humidity levels typically hovering around the 70% mark by late summer and into autumn. This trend suggests a transition towards drier conditions as the year progresses, making September an increasingly comfortable time to visit. As the humidity continues to decrease into October, where it hits a low of 69%, residents and travelers alike can enjoy slightly more breathable air as the wet season draws to a close.
In September, Peneng, Indonesia, continues to experience extreme UV index levels, registering at 15. This trend of high UV exposure prevails throughout the year, with remarkably consistent readings—ranging from 12 to 16—primarily classified as extreme. The burn time remains notably short, at just 10 minutes, emphasizing the critical need for sun protection. As a hotspot for sunlight, visitors and residents alike should take heed of the consistent UV intensity, especially as they step outside during this month. For more insights on how Peneng’s UV index evolves, check out Peneng UV Index.
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September in Penang, Indonesia, basks in 304 hours of radiant sunshine, making it one of the sunniest months of the year. This delightful stretch of sunshine follows the peak of the summer months—August, which tops at 311 hours, and continues into the vibrant October, boasting 318 hours. The trend leading up to September reveals a steady increase in sunshine hours, with a noticeable climb from 267 hours in February to an impressive 307 hours in July. As the dry season approaches, the consistency of sunshine highlights the allure of Penang as an ideal destination for those seeking warmth and outdoor adventures. With just the right balance of sunshine and tropical charm, September is a month to embrace the glow of this beautiful island.
In Penang, Indonesia, September marks a transitional period for sunny days. With a 27% chance of sunshine, this month falls in the latter half of a generally drier season, where sunlit days peak in the earlier months of April and July, both at 43%. Following the summer months, September reflects a notable decline in sunny intervals compared to August's 35%, hinting at the onset of the wetter season. As the year progresses, the likelihood of sunny weather dips significantly into the cooler months, so if you’re planning an outdoor adventure, September offers a fair chance to bask in the sun before the clouds roll back in.
As September rolls in, Penang embraces a delightful return to 12 hours of daylight, a trend reminiscent of the early months of the year. This seasonal shift marks a subtle transition from the slight reduction in daylight experienced between April and August, when the hours of sunlight dipped to 11. The consistent daylight duration of January through March sets the stage for this resurgence, while the months ahead promise the same generous light, extending into the end of the year. Thus, as the days lengthen once more, residents and visitors alike can bask in the rejuvenating glow that September brings to this vibrant island.
In September, the winds of Penang, Indonesia, offer a delightful transition as the average speed reaches 2.8 m/s (6 mph). This marks a slight dip from the robust 3.1 m/s (7 mph) experienced in both July and August, when breezy conditions often invigorate the tropical atmosphere. As the region moves toward October, where speeds taper to 2.0 m/s (4 mph), September stands out with its gentle yet lively breezes that complement the warm, humid days. This period showcases the shifting patterns of Penang’s winds, evoking a sense of balance between summer's energetic gusts and the calmer breezes of the approaching fall. Overall, September serves as a refreshing midpoint that bridges the stronger winds of mid-year with the quieter months ahead.
Weather in Peneng varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Peneng, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase distinct weather patterns. In September, temperatures range from a mild minimum of 20°C (68°F) to a comfortable maximum of 28°C (84°F), with an average of 24°C (76°F). The month experiences 66 mm (2.6 in) of precipitation spread over 16 days, and humidity levels sit at 71%. Conversely, January's temperatures are warmer, with a minimum of 22°C (72°F) and a peak of 31°C (87°F), averaging 26°C (78°F). Rainfall significantly increases during this month, with a total of 377 mm (14.9 in) across 24 days and higher humidity at 78%. This comparison illustrates how January tends to be more humid and wetter than September, impacting overall comfort levels, especially for outdoor activities. For more specific details on January weather, visit Peneng weather in January.
September typically features milder temperatures, with a minimum of 20°C (68°F) and an average of 24°C (76°F), peaking at 28°C (84°F). This month experiences moderate rainfall, with 66 mm (2.6 in) of precipitation spread over 16 days, and a humidity level of 71%. In contrast, February is warmer and wetter, showcasing a minimum temperature of 23°C (73°F), an average of 26°C (78°F), and a maximum of 30°C (87°F). With 352 mm (13.8 in) of rain over 26 days and a higher humidity of 84%, February presents a more humid and rain-heavy climate. For further details on February weather, you can visit Peneng weather in February.
In comparing the weather patterns of September and March, we can see notable differences. September features a milder temperature range with a minimum of 20°C (68°F) and an average of 24°C (76°F), while March is slightly warmer with a minimum of 22°C (72°F) and an average of 26°C (79°F). Precipitation is significantly higher in March, totaling 350 mm (13.8 in) over 29 days, compared to September's 66 mm (2.6 in) over just 16 days. Additionally, humidity levels rise in March to 82%, compared to September’s 71%. For more detailed weather information, you can check Peneng weather in March.
In comparing the weather between September and April, we notice a shift in temperature and precipitation patterns. September experiences milder temperatures with a minimum of 20°C (68°F) and an average of 24°C (76°F), while April is warmer, boasting a minimum of 22°C (72°F) and an average of 26°C (79°F). In terms of maximum temperatures, April peaks higher at 30°C (87°F) compared to September’s 28°C (84°F). However, April also brings significantly more rain, with 186 mm (7.3 in) of precipitation over 23 days, in contrast to September's 66 mm (2.6 in) across 16 days. Humidity levels are also slightly higher in April at 80%, compared to 71% in September. For more detailed information, you can check Peneng weather in April.
September and May offer distinct weather experiences. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 28°C (84°F), with an average of 24°C (76°F). This month sees about 66 mm (2.6 in) of precipitation over 16 days, accompanied by a humidity level of 71%. In contrast, May is slightly warmer, with temperatures fluctuating between 22°C (72°F) and 30°C (86°F), and an average of 25°C (78°F). The precipitation is higher at 89 mm (3.5 in) over the same number of days, resulting in a higher humidity level of 79%. For more insights into May weather, check out Peneng weather in May.
In comparing the weather between September and June, both months present warm temperatures with an average around 24°C (76°F). However, September tends to have a slightly lower temperature range, with a minimum of 20°C (68°F) and a maximum of 28°C (84°F), compared to June's minimum of 21°C (70°F) and maximum of 29°C (84°F). Precipitation is noteworthy in both months: September receives about 66 mm (2.6 in) over 16 days, while June experiences higher rainfall at 85 mm (3.4 in) over 17 days. Additionally, humidity levels are slightly higher in June at 76%, compared to September's 71%. For more specific details about June weather in Peneng, you can refer to Peneng weather in June.
When comparing the weather of September and July, we find that both months have similar temperature ranges, with minimums of 20°C (68°F), average temperatures around 24°C (75-76°F), and maximums peaking at 28°C (83-84°F). However, September experiences slightly higher precipitation levels, accumulating 66 mm (2.6 in) over 16 days compared to July's 62 mm (2.5 in) over the same number of days. Additionally, September's humidity is slightly lower at 71%, whereas July is at 73%. For more details, you can visit Peneng weather in July.
In comparing the weather between September and August, September tends to be slightly warmer, with average temperatures reaching 24°C (76°F) compared to August's 23°C (74°F). Both months experience a maximum of 28°C (84°F) and similar minimum temperatures, with September starting at 20°C (68°F) and August at 19°C (67°F). Precipitation levels are quite comparable as well, with September receiving 66 mm (2.6 in) over 16 days, just slightly more than August's 63 mm (2.5 in) across the same number of days. Humidity remains relatively consistent, hovering around 71% in September and 72% in August, indicating a similar level of moisture in the air. For a more detailed look at the weather conditions, you can check Peneng weather in August.
September and October showcase a gradual transition in weather patterns. In September, temperatures range from a mild 20°C (68°F) to a maximum of 28°C (84°F), with an average of 24°C (76°F). The month experiences 66 mm (2.6 in) of precipitation spread over 16 days, along with relatively high humidity at 71%. In contrast, October sees a slight increase in temperatures, with minimums around 21°C (70°F), an average of 25°C (77°F), and maximums peaking at 29°C (85°F). However, precipitation rises to 94 mm (3.7 in), occurring over 18 days, while humidity remains relatively stable at 69%. This indicates October is generally warmer and wetter than September, as detailed in the Peneng weather in October.
September generally experiences slightly cooler temperatures, with an average of 24°C (76°F) and maximums reaching 28°C (84°F). In contrast, November shows a warm progression, boasting an average of 25°C (78°F) and highs of 30°C (86°F). However, November is significantly wetter, receiving 383 mm (15.1 in) of precipitation over 24 days, compared to September's 66 mm (2.6 in) across 16 days. Despite the humidity levels being quite similar, with September at 71% and November at 69%, the increased rainfall in November can create a more damp environment. For more details, visit Peneng weather in November.
September and December weather show notable differences in temperature and precipitation. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 28°C (84°F), with an average of 24°C (76°F). This month experiences around 66 mm (2.6 in) of precipitation over 16 days, maintaining a humidity level of 71%. Conversely, December brings warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 31°C (87°F), averaging 26°C (79°F). However, this increase in warmth is accompanied by significantly higher rainfall, totaling 338 mm (13.3 in) across 28 days, while humidity remains similar at 72%. For more detailed information, check Peneng weather in December.
As September rolls in, Peneng experiences a delightful transition in weather, marked by a comfortable warmth that distinguishes it from both the sweltering summer months and the cooler winter season. With average temperatures hovering around 24°C (76°F) and humidity levels reaching 71%, visitors can expect a pleasant atmosphere, albeit with a fair share of rain, totaling about 66 mm over roughly 16 days. This blend of warmth and moisture sets the stage for lush landscapes and vibrant greenery, making it a unique time to explore the beauty of the region. For a deeper dive into what to expect throughout the year, check out the detailed information available at Peneng Climate.