Last updated: August 21, 2025
In Xiamen, China, September greets visitors with a tropical climate, where temperatures can soar to a maximum of 36°C (97°F), averaging around 28°C (82°F). The month witnesses a mild drop to a minimum of 20°C (68°F), creating warm evenings ideal for strolls by the coast. However, with an average of 93 mm (3.7 in) of rain across 13 days, be prepared for occasional downpours amidst the humidity, which hovers at a steamy 70%. This dynamic weather should inspire a balance of outdoor adventures and cozy indoor activities for all visitors.
In September, Xiamen begins to transition from the sweltering summer months to a more temperate autumn. The temperatures are notably warm, with minimums around 20°C (68°F) and averages peaking at 28°C (82°F), while still flirting with summer highs of 36°C (97°F). This month marks a subtle shift as it offers a delightful escape from the torrid heat of August, but retains enough warmth to keep outdoor adventures enticing. The humidity persists, typical of coastal climates, ensuring that September remains lush and vibrant. Overall, the weather invites visitors to enjoy the city’s stunning scenery, making it a prime time for exploration before the cooler October days set in.
In September, Xiamen experiences a notable shift in precipitation patterns as summer gives way to autumn. The city receives an average of 93 mm (3.7 in) of rainfall over 13 days, reflecting a decline from the peak months of July and August, which see significantly higher totals of 130 mm (5.1 in) and 253 mm (9.9 in) respectively. This decrease in precipitation marks a transition as the intense summer rains begin to taper off, leading into the drier autumn months ahead. Overall, September's rainfall is characteristic of a moderate late-summer wet season, providing a refreshing end to the warmer months while setting the stage for the much drier October, which averages only 27 mm (1.1 in) of rain.
As summer fades, September in Xiamen, China, welcomes a slight relief in humidity levels, dipping to 70%. This marks a refreshing contrast to the peak months of May through August, when humidity levels consistently hovered above 80%. Interestingly, September's humidity is the lowest of the year, hinting at the onset of autumn and a welcome shift in the weather patterns. Following this trend, humidity begins to rise again in October, returning to 73%, but the breezy September air offers a brief respite that many residents look forward to after the sweltering summer.
In September, Xiamen, China, experiences an UV Index of 11, classifying it in the extreme exposure category. This means the risk of harm from unprotected sun exposure is high, with a burn time of just 10 minutes. Following the peak summer months of July and August, when the UV Index topped at 13, September’s decrease to 11 suggests a slight easing in sun intensity but still warrants caution. As the year transitions into autumn, outdoor enthusiasts should remain vigilant, as the UV levels remain significantly high compared to the cooler months. For more detailed insights on UV levels throughout the year, visit Xiamen UV Index.
UV Risk Categories
As September unfolds in Xiamen, China, the city basks in an impressive 295 hours of sunshine, maintaining the high standards set by the summer months. Following the sunlit 331 hours of July and the warmer 309 hours of August, September’s golden rays signal a gentle transition into autumn, yet still promise plenty of brightness. This trend showcases a remarkable consistency in Xiamen's climatic embrace, as it enjoys the peak of the sunlit season during mid-year, before slightly tapering off in October with 283 hours. The gradual decrease in daylight hours through the remaining months hints at the impending cooler days, making September a perfect time to soak up the last warm whispers of summer amidst the stunning coastal views.
In September, Xiamen experiences a 58% chance of sunny weather, marking a significant uptick in sunshine compared to the summer months, where the likelihood dips to a mere 7% in June and 22% in August. This transitional period from summer to early autumn brings more favorable conditions, making September a pleasant time for outdoor activities. Interestingly, the likelihood of sunny weather in September is notably higher than the preceding months and aligns closely with October and December’s rates. As the city shifts towards the cooler months, residents and visitors alike can anticipate a delightful balance of warmth and sunshine, perfect for exploring Xiamen's scenic beauty.
As summer transitions to autumn, September in Xiamen, China, offers a gentle balance in daylight duration with approximately 12 hours of sunlight. This marks a slight decrease from the previous month, reflecting the gradual shift towards shorter days. The trend throughout the year shows a gradual increase in daylight as it moves from January’s 10 hours, peaking at 13 hours during the warm summer months of May, June, and July. Following this peak, the days begin to shorten again in August and September, setting the stage for shorter days as the year winds down. This rhythm of daylight not only influences the natural environment but also enriches the cultural experiences unique to each season in Xiamen.
As the summer begins to wane, September in Xiamen, China, ushers in the gentlest of breezes, with an average wind speed of 2.2 m/s (5 mph)—the calmest month of the year. This marked decline from the warmer months of July and August, which saw sustained low winds at 2.5 m/s and 2.4 m/s respectively, signifies a transition into the autumn season. Notably, this trend of decreasing wind speed continues through late summer, before sharply rising again in October to an invigorating 4.4 m/s (10 mph). This seasonal shift not only brings refreshing gusts in the following months but also paints a picturesque backdrop for the coastal city, inviting locals and visitors alike to enjoy the soft, soothing winds as they bid farewell to summer.
Weather in Xiamen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Xiamen, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warm with average temperatures around 28°C (82°F) and highs reaching up to 36°C (97°F), accompanied by significant humidity at 70%. This month also sees frequent rainfall, with precipitation occurring on 13 days and totaling 93 mm (3.7 in). In contrast, January brings a much cooler climate, featuring average temperatures of 14°C (58°F) and daily highs peaking at 26°C (80°F). The winter month experiences far less precipitation, with only 35 mm (1.4 in) falling over just 4 days. Humidity levels are slightly higher at 73%, but the overall ambiance is distinctly drier and cooler compared to the warm, humid days of September. For more detailed information, you can check out Xiamen weather in January.
September and February present contrasting weather experiences. In September, temperatures soar with a minimum of 20°C (68°F) and an average high of 36°C (97°F), creating a warm atmosphere ideal for outdoor activities. This month also sees substantial rainfall, accumulating to 93 mm (3.7 in) over about 13 days, and humidity levels remain high at 70%. Conversely, February offers a cooler climate, with temperatures ranging from a chilly 2°C (36°F) at night to a pleasant maximum of 27°C (81°F) during the day. Precipitation is significantly lower at 47 mm (1.9 in) over just 6 days, while humidity is slightly elevated at 73%. For those curious about weather specifics in February, more details can be found at Xiamen weather in February.
In comparing the weather between September and March, we observe a stark contrast in temperatures and humidity levels. September boasts much warmer conditions, with minimums around 20°C (68°F) and maximums reaching up to 36°C (97°F), resulting in an average temperature of 28°C (82°F). Additionally, the humidity remains relatively high at 70%, and the month experiences about 93 mm (3.7 in) of rainfall over 13 days. In contrast, March presents cooler weather with minimum temperatures dropping to 7°C (45°F) and average highs of 29°C (85°F), leading to an overall average of 18°C (64°F). Although precipitation is similar at 90 mm (3.5 in) over 11 days, March's humidity is slightly higher at 80%. For more detailed insights into March weather, you can check Xiamen weather in March.
When comparing the weather in September and April, distinct differences emerge. September boasts a higher average temperature of 28°C (82°F), with maximums reaching 36°C (97°F), while April's temperatures range from a cooler minimum of 9°C (49°F) to a maximum of 32°C (90°F), resulting in an average of 21°C (70°F). Both months experience similar precipitation levels, with September receiving 93 mm (3.7 in) over 13 days and April recording 94 mm (3.7 in) over just 9 days. However, April's humidity is slightly higher at 81%, compared to September's 70%. For more details about April weather, check out Xiamen weather in April.
In comparing the weather of September and May, September experiences higher average temperatures, ranging from a minimum of 20°C (68°F) to a maximum of 36°C (97°F), while May has a cooler range with minimums at 14°C (57°F) and similar maximums of 36°C (97°F). Rainfall is another distinguishing factor; September sees about 93 mm (3.7 in) of precipitation over 13 days, whereas May is wetter with 139 mm (5.5 in) across 16 days. Humidity levels are also higher in May, averaging 85%, compared to September's 70%. For a closer look at May's weather patterns, you can check Xiamen weather in May.
In comparing the weather of September and June, both months exhibit warm temperatures, but September generally offers slightly higher maximum temperatures, averaging 36°C (97°F) compared to June's 35°C (95°F). However, June experiences slightly cooler minimum temperatures at 21°C (70°F) versus September's 20°C (68°F). Rainfall also varies significantly: June receives notably more precipitation at 243 mm (9.6 in) over 19 days, while September sees 93 mm (3.7 in) across 13 days, indicating a wetter start to the summer. Additionally, humidity levels are higher in June at 81%, compared to 70% in September, contributing to a more tropical feel during the former month. For more detailed insights, you can check Xiamen weather in June.
In comparing the weather of September and July, September offers slightly cooler temperatures, with a minimum of 20°C (68°F) compared to July's 25°C (77°F). The average temperatures are also mild, with September averaging around 28°C (82°F), only slightly lower than July's 29°C (84°F). However, July experiences more humidity at 84%, in contrast to September’s 70%, making it feel muggier during the height of summer. Rainfall is more prevalent in July as well, with 130 mm (5.1 in) over 17 days, compared to September’s 93 mm (3.7 in) over 13 days. For more details on July weather specifically, check out Xiamen weather in July.
When comparing the weather between August and September, it's clear that September is slightly cooler, with average temperatures ranging from a minimum of 20°C (68°F) to a maximum of 36°C (97°F), while August maintains a warmer minimum of 25°C (76°F) and an average of 29°C (84°F). Precipitation also significantly decreases in September, totaling 93 mm (3.7 in) over 13 days, compared to August's much wetter conditions of 253 mm (9.9 in) across 21 days. Additionally, humidity drops from 82% in August to 70% in September, making September feel more comfortable overall. For more details on August weather, visit Xiamen weather in August.
September and October display notable differences in weather characteristics. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 36°C (97°F), with an average of 28°C (82°F). The month experiences significant rainfall, with 93 mm (3.7 in) spread over 13 days, contributing to a high humidity level of 70%.
In contrast, October sees a drop in temperature, with a minimum of 15°C (59°F) and a maximum of 34°C (94°F), averaging 25°C (77°F). Precipitation also decreases considerably, totaling only 27 mm (1.1 in) over just 4 days. Despite a slight rise in humidity to 73%, October generally offers more comfortable and drier weather. For more details, you can check Xiamen weather in October.
September and November present distinctly different weather patterns. In September, temperatures are significantly higher, with lows averaging around 20°C (68°F) and highs reaching up to 36°C (97°F), creating a warm and humid atmosphere with an average humidity level of 70%. The month also sees substantial rainfall, with precipitation totaling 93 mm (3.7 in) over 13 days. In contrast, November experiences cooler temperatures, with a minimum of 12°C (54°F) and a maximum of 31°C (87°F), resulting in a more temperate climate. Additionally, November boasts much less rainfall, totaling just 37 mm (1.4 in) over only 5 days, while humidity rises slightly to 77%. For more detailed insights, you can check Xiamen weather in November.
In September, the weather is warm and humid, with temperatures ranging from a low of 20°C (68°F) to a high of 36°C (97°F). This month experiences an average temperature of 28°C (82°F) and considerable precipitation, totaling 93 mm (3.7 in) across about 13 days. In contrast, December brings cooler conditions, with temperatures dipping to a minimum of 6°C (43°F) and peaking at 28°C (83°F), averaging around 16°C (62°F). The month is much drier, with only 35 mm (1.4 in) of rain spread over just 3 days, and a higher humidity level of 79%. For more details on the December climate, check Xiamen weather in December.
September in Xiamen ushers in a shift in weather, marking a transition from the intense summer heat to a more moderate climate. With average temperatures around 28°C (82°F), visitors can enjoy warm days without the sweltering peak of summer. While the month does see some rainfall, totaling about 93 mm across 13 days, the humidity remains notably high at about 70%, creating a tropical feel that’s characteristic of this coastal city. Compared to the blistering highs of earlier months, September offers a more balanced experience for exploring Xiamen's vibrant culture and stunning scenery. For more insights on what to expect throughout the year, check out Xiamen Climate.