Last updated: August 21, 2025
September in Sai Kung, Hong Kong offers a vibrant blend of tropical weather characterized by maximum temperatures reaching 34°C (94°F) and a warm average of 28°C (83°F). While the lowest temperature can dip to a comfortable 24°C (75°F), residents and visitors alike experience a humid atmosphere with humidity levels at around 75%. This month also brings significant rainfall, with total precipitation measuring 215 mm (8.5 in) across 22 days, creating a lush, verdant landscape that defines this picturesque coastal region.
In September, Sai Kung, Hong Kong transitions from the sweltering summer heat to a slightly cooler autumn vibe. The temperatures become a touch more bearable, with minimums around 24°C (75°F) and averages at 28°C (83°F), providing a cozy warmth that many locals enjoy. While daytime highs can still reach up to 34°C (94°F), the humidity begins to ease, creating a more comfortable environment for outdoor activities. This gradual shift marks a delightful change, as the region prepares for the cooler months ahead while still holding onto the vibrant essence of summer.
September in Sai Kung, Hong Kong, sees a notable shift in precipitation patterns as the region transitions from the summer monsoon. With 215 mm (8.5 in) of rainfall over 22 days, it marks a significant decrease compared to the torrential rains of August, which recorded 362 mm (14.2 in). This month's rainfall is primarily characterized by frequent but lighter showers, as opposed to the heavier downpours of previous months. Interestingly, September serves as a bridging period, with rainfall levels still high relative to the preceding months but hinting at a gradual tapering off as the region edges closer to drier October. While the wet weather continues, it also provides a refreshing respite from the intense summer heat, embodying the dynamic climate of Sai Kung.
In Sai Kung, Hong Kong, the month of September marks a notable shift in humidity, with levels averaging 75%—a decline from the peak summer months of July and August, both at a steamy 88%. This slight reduction signals the onset of autumn and brings a more comfortable atmosphere, although humidity remains significantly elevated compared to the cooler months at either end of the year. From the year’s start in January at 64%, humidity climbs steadily, reaching its annual high during the summer. As September unfolds, residents can finally enjoy a respite from the sweltering heat while still embracing the lingering warmth and moisture typical of tropical climates. The trend suggests a gradual transition into drier conditions, with October promising a further drop to 65%, hinting at the refreshing changes brought by the approaching fall.
As the summer heat begins to wane, September in Sai Kung, Hong Kong maintains an extreme UV Index of 12, indicating that sun safety remains crucial. This trend of high UV levels extends from May through September, with values consistently peaking at 12 or higher during these months. The burn time diminishes to just 10 minutes, emphasizing the need for protective measures if you're spending time outdoors. As we transition into October, the UV Index slightly decreases to 11, yet vigilance is still necessary. This month-by-month pattern highlights the importance of understanding and monitoring UV levels for your safety. For more detailed information, visit Sai Kung UV Index.
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As summer transitions to autumn, September in Sai Kung, Hong Kong continues to bask in warmth, boasting an impressive 288 hours of sunshine. This month showcases a delightful balance as it follows the sun-drenched July, which recorded the highest sunshine hours of the year at 323 hours. August, while slightly lower at 280 hours, gently ushers in the subtle shift towards September. Despite the gradual dip in daylight as the year progresses, sunshine in September remains robust, comfortably surpassing the spring months of January through April. This trend not only highlights the enduring charm of Sai Kung's weather but also offers residents and visitors ample opportunity to enjoy the stunning landscapes and outdoor activities, making September a truly golden month in this coastal paradise.
September in Sai Kung, Hong Kong, offers a moderate likelihood of sunny weather, with a chance of sunshine standing at 41%. This marks a notable improvement from the previous summer months, particularly June and August, which dip to 12% and 14% respectively. As the month transitions from summer to autumn, the likelihood of sunny days is more favorable than the low percentages seen in late spring. While it does not reach the sunnier heights of January or November, September’s weather hints at a refreshing change, encouraging outdoor activities as the humidity gradually recedes. With these trends, visitors can anticipate a mix of sun and clouds, making it a perfect time to explore the stunning landscapes of Sai Kung.
As summer fades, September in Sai Kung, Hong Kong, brings a gentle transition in daylight duration, offering residents and visitors an inviting 12 hours of sunlight each day. This month marks a harmonious balance between the extended brightness of summer, which peaks at 13 hours in June through August, and the gradual retreat into the shorter days of fall as October approaches. The consistent 12 hours of daylight in September create an ideal backdrop for outdoor activities and scenic explorations, as nature begins to shift, showcasing the beauty of late summer and early autumn. As the days grow shorter, the vibrant atmosphere of Sai Kung remains, encouraging adventure and appreciation of the stunning landscapes under the warm September sun.
As the summer heat begins to wane in Sai Kung during September, the winds gently remind us that autumn is approaching. With an average wind speed of 2.2 m/s (5 mph), this month experiences the slightest breezes of the year, marking a noticeable drop from the earlier months. As a backdrop to the stunning coastal views, these gentle winds set a tranquil scene, inviting locals and visitors alike to savor the peaceful ambiance. Following the peak of summer, where strong gusts prevailed, September brings a soothing calm, yet it serves as a prelude to the invigorating winds that October will deliver. Thus, September in Sai Kung beautifully balances relaxation and anticipation, making it a perfect time to enjoy the serene landscapes or undertake leisurely coastal strolls.
Weather in Sai Kung varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sai Kung, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures are typically warm, with a minimum of 24°C (75°F) and an average of 28°C (83°F), peaking at a high of 34°C (94°F). The month is also characterized by significant precipitation, averaging 215 mm (8.5 in) over 22 rainy days and a high humidity of 75%. In contrast, January brings much cooler weather, with temperatures ranging from a low of 6°C (42°F) to an average of 16°C (62°F), reaching a maximum of 25°C (78°F). Additionally, January is relatively dry, receiving only 16 mm (0.6 in) of rainfall over just 2 days, and the humidity decreases to 64%. For more specific insights on January conditions in Sai Kung, you can check Sai Kung weather in January.
September and February showcase a stark contrast in weather patterns. September typically boasts much warmer temperatures, with a minimum of 24°C (75°F) and a maximum of 34°C (94°F), alongside significant precipitation of 215 mm (8.5 in) spread over 22 days, resulting in high humidity levels at 75%. In contrast, February experiences cooler temperatures, ranging from a minimum of 5°C (42°F) to a maximum of 26°C (79°F), with much less rainfall at 43 mm (1.7 in) over only 6 days and a slightly lower humidity of 68%. For more detailed insights on February weather, you can check Sai Kung weather in February.
In comparing the weather between September and March, there are significant differences in temperature and precipitation. September features a warm climate with an average temperature of 28°C (83°F), peaking at 34°C (94°F), while March experiences much cooler temperatures, with an average of 20°C (69°F) and a maximum of 29°C (85°F). Additionally, September is notably wetter, receiving 215 mm (8.5 in) of precipitation over 22 days, compared to March's much drier conditions with only 59 mm (2.3 in) of rain on 11 days. The humidity levels remain fairly similar, with September at 75% and March at 73%. For a detailed look at weather patterns in March, check out Sai Kung weather in March.
When comparing the weather in September to April, there are notable differences in temperature and precipitation. September boasts warmer temperatures, with a minimum of 24°C (75°F) and an average of 28°C (83°F), peaking at 34°C (94°F). This month also sees significant rainfall, with 215 mm (8.5 in) spread over 22 days, resulting in a humid atmosphere at 75%. In contrast, April experiences a much cooler climate, with temperatures ranging from a minimum of 13°C (56°F) to an average of 23°C (73°F), and a maximum of 31°C (89°F). Additionally, April has considerably less rainfall, totaling 93 mm (3.7 in) over 12 days, and a slightly lower humidity level of 71%. For more detailed information, you can check Sai Kung weather in April.
September and May showcase distinct weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). The month is marked by significant rainfall, totaling 215 mm (8.5 in) over 22 days and accompanied by a humidity level of 75%. In contrast, May features moderately cooler temperatures, with minimums of 16°C (61°F) and maximums reaching 35°C (95°F), averaging at 26°C (80°F). Although May receives slightly less precipitation at 196 mm (7.7 in) over 21 days, the humidity is slightly higher at 79%. For a closer look at the specifics, check out Sai Kung weather in May.
In comparing the weather of September and June, both months experience similar temperature ranges, with minimums around 24°C (75-76°F), averages of 28°C (83-84°F), and maximums reaching 34°C (94°F). However, June tends to be wetter, with a total precipitation of 344 mm (13.5 in) over 26 days, compared to September’s 215 mm (8.5 in) across 22 days. Humidity levels are also slightly higher in June at 77%, compared to September's 75%. For a more detailed look at June weather, you can visit Sai Kung weather in June.
When comparing the weather in September and July, we can observe some notable differences. In September, the average temperature is slightly lower at 28°C (83°F) compared to July's 29°C (85°F), with maximum temperatures reaching 34°C (94°F)—a bit cooler than July's peak of 36°C (97°F). Both months experience similar levels of precipitation, with September receiving 215 mm (8.5 in) over 22 days and July slightly less at 213 mm (8.4 in) over 26 days. However, September shows a lower humidity level at 75%, while July's humidity is notably higher at 88%. For more specific details about the conditions in July, you can visit Sai Kung weather in July.
When comparing the weather in August and September, we observe a slight decrease in temperature as September features a minimum of 24°C (75°F) and an average of 28°C (83°F), compared to August's minimum of 25°C (77°F) and average of 29°C (84°F). The maximum temperature in September also drops to 34°C (94°F), while August peaks at a higher 36°C (97°F). Precipitation levels are significantly reduced in September, with 215 mm (8.5 in) over 22 days, compared to August's 362 mm (14.2 in) over 26 days. Additionally, humidity decreases from 88% in August to 75% in September, indicating a shift towards a more comfortable climate. For more details, you can check Sai Kung weather in August.
September and October present distinct shifts in weather patterns. In September, temperatures remain warmer with a minimum of 24°C (75°F) and an average high of 34°C (94°F), alongside significant rainfall totaling 215 mm (8.5 in) across 22 days, contributing to a high humidity level of 75%. In contrast, October sees a cooler climate, with minimum temperatures dropping to 16°C (60°F) and an average of 25°C (78°F), while the maximum temperature stays similar at 34°C (93°F). Additionally, precipitation decreases to 161 mm (6.3 in) over just 10 days, and humidity lowers to 65%. For more detailed weather insights, you can visit Sai Kung weather in October.
In September, the weather is characterized by much warmer conditions, with average temperatures around 28°C (83°F) and highs reaching up to 34°C (94°F), accompanied by high humidity levels of 75%. This month sees considerable rainfall, with 215 mm (8.5 in) of precipitation spread over 22 days, making it a rather wet period.
In contrast, November brings a significant drop in temperature, with an average of 22°C (72°F) and maximums of 29°C (85°F). The humidity also decreases to 64%, and the precipitation is notably lower, totaling just 29 mm (1.1 in) over only 4 days. This shift makes November a much drier and cooler month compared to September. For a more detailed look at November weather, check out Sai Kung weather in November.
September and December exhibit a stark contrast in weather patterns. In September, temperatures remain warm, with minimums around 24°C (75°F) and maximums soaring to 34°C (94°F). This month also witnesses significant rainfall, totaling 215 mm (8.5 in) over 22 days, paired with a humidity level of 75%. In contrast, December brings cooler temperatures, with a minimum of 8°C (46°F) and an average of 17°C (64°F), peaking at 27°C (81°F). Precipitation drastically decreases to just 21 mm (0.8 in) over only three days, and humidity drops slightly to 69%. For more detailed insights, you can check Sai Kung weather in December.
As September rolls in, Sai Kung experiences a notable shift in weather, marked by warm temperatures that average around 28°C, making it warmer than many other months. However, the month also brings higher humidity levels and frequent rainfall, with over half of the month seeing precipitation that totals approximately 215 mm. This combination creates a unique tropical atmosphere that stands in contrast to the drier seasons, inviting both rain-soaked adventures and lush landscapes. For those interested in diving deeper into the unique weather dynamics of this beautiful region, explore more at Sai Kung Climate.