Last updated: August 21, 2025
September in Xihu, China offers a delightful climate characterized by pleasant temperatures and moderate humidity. With maximums reaching 32°C (90°F) and an average of 22°C (72°F), the month transitions smoothly from the summer heat. The minimum temperature dips to a refreshing 12°C (55°F), inviting outdoor exploration. Although the area experiences 82 mm (3.2 in) of rainfall over approximately 8 days, the verdant landscapes remain a highlight, nourished by the late-summer showers. Humidity levels hover around 65%, adding a touch of moisture that enhances the overall ambiance of this beautiful destination.
In September, Xihu, China, experiences a delightful transition as summer gradually surrenders to autumn. With minimum temperatures around 12°C (55°F) and an average of 22°C (72°F), the weather is pleasantly mild, making it an ideal time for outdoor activities. The maximum temperature can reach 32°C (90°F), hinting at the lingering warmth of summer while providing a comfortable reprieve from the intense heat of July and August. This month marks a turning point, as the temperatures begin to dip from the peak warmth of summer months, creating a balance that invites both locals and visitors to enjoy the vibrant natural beauty and cultural richness of the region amidst the fading summer warmth.
September in Xihu marks a noticeable shift in the rainfall pattern, with 82 mm (3.2 in) of precipitation over 8 days. This is a decline from the heavy rains of July, which saw an overwhelming 264 mm (10.4 in) spread over 14 days, and August's substantial 183 mm (7.2 in) across 16 days. While September retains a significant amount of rain, it signals the beginning of drier months ahead, paving the way for October’s expected decrease to just 26 mm (1.0 in). This transition highlights a sharp decline in both precipitation amounts and rainy days, characteristic of Xihu’s shifting seasons.
September in Xihu, China marks a notable shift in humidity, dipping to 65% after the sweltering summer months. This decline follows a peak in July at 84%, which is characteristic of the region's humid subtropical climate. The relative comfort of September provides a brief respite, as humidity levels remain significantly higher than the winter months, where levels plummet to 52% in January. Overall, the gradual transition from the oppressive humidity of summer to a more moderate fall offers residents and visitors a chance to enjoy the beautiful scenery without the muggy discomfort, setting the stage for the approaching seasonal changes.
September in Xihu, China, sees a UV Index of 8, placing it in the very high category with a burn time of just 15 minutes. This marks a slight decline from the summer peak, where July reached an extreme UV Index of 11, but it still demands caution. As the sun's intensity gradually decreases from the scorching summer months, September presents a critical time for sun exposure awareness. The trend reveals that while the UV Index is lower than in July and August, it remains significant, emphasizing the need for protective measures when enjoying outdoor activities. Stay informed and protect your skin—learn more about the UV Index for Xihu here.
UV Risk Categories
As September arrives in Xihu, China, the sun graces the region with 279 hours of brilliant daylight, reflecting a seasonal shift as summer begins to wane. While this marks a notable decrease from the sun-drenched heights of 316 hours in May and 312 hours in July, it remains generous compared to the winter months ahead. September’s days are bathed in softer sunlight, hinting at the transitional beauty between the warm embrace of summer and the cooler embrace of autumn. The trend reveals a remarkable consistency in sunshine hours throughout the year, with a peak in late spring and early summer, inviting both locals and tourists to savor the stunning landscapes that Xihu has to offer.
In September, Xihu, China experiences a moderate chance of sunny weather, with a 40% likelihood of clear skies. This marks a slight improvement compared to the summer months, where July's sun chances drop to just 25%. Despite September's chance being lower than the peak sunny months of January and December, which boast 61% and 67% respectively, it still offers a pleasant opportunity for outdoor activities before autumn sets in. As we transition from the humid summer, the weather begins to stabilize, making September a favorable time for enjoying milder temperatures and occasional sunshine.
In Xihu, China, the rhythm of daylight unfolds gracefully throughout the year. As summer fades and autumn approaches, September sees a gentle decline in daylight hours, offering 12 hours of sunlit charm, just a notch below the 13 hours enjoyed in August. This gradual transition marks a shift from the long, sun-kissed days of early summer, which peak at 14 hours in June and July, to the shorter days that signal the impending winter, where daylight dwindles to a mere 9 hours by December. This cyclical pattern not only highlights the seasonal allure of Xihu, but also invites residents and visitors alike to savor the softer, waning light of autumn.
As September arrives in Xihu, China, the gentle caress of the wind, averaging 3.0 m/s (7 mph), breathes life into the scenery, marking a transition in the seasonal rhythm. This month's wind speed reflects a slight uptick from the languid breezes of August, hinting at a shift toward the invigorating gusts of autumn. Throughout the year, the region experiences a dynamic range of wind patterns, with February and July peaking at 3.3 m/s (7 mph). However, it's the overall stability of the wind in September, as it maintains a consistent presence, that truly captivates. This soothing yet vibrant air invites both locals and visitors to enjoy the beautiful landscapes of Xihu, as nature prepares for the cooler months ahead.
Weather in Xihu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Xihu, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 12°C (55°F) at night to a warm 32°C (90°F) during the day, with an average of 22°C (72°F). The month experiences moderate rainfall, with about 82 mm (3.2 in) over approximately 8 days, and humidity levels hover around 65%. In contrast, January sees much colder conditions, with temperatures plunging to a minimum of -18°C (0°F) and reaching a maximum of just 12°C (54°F), resulting in an average of 0°C (33°F). Precipitation is significantly lower at 18 mm (0.7 in) across only 3 days, and the humidity decreases to 52%. For more detailed insights, check out Xihu weather in January.
September and February showcase a stark contrast in weather conditions. September enjoys a milder temperature range, with averages around 22°C (72°F) and highs reaching 32°C (90°F), along with moderate precipitation of 82 mm (3.2 in) over approximately 8 days, contributing to a humidity level of 65%. In contrast, February presents a much colder climate, with average temperatures plummeting to around 2°C (37°F) and minimal precipitation of 20 mm (0.8 in) spread across just 3 days, along with a humidity of 60%. For those interested in detailed February weather in Xihu, more information can be found here: Xihu weather in February.
September and March present contrasting weather patterns. In September, temperatures typically range from a minimum of 12°C (55°F) to a maximum of 32°C (90°F), with an average of 22°C (72°F). This month also experiences higher precipitation, averaging 82 mm (3.2 in) over 8 days, while humidity sits at a comfortable 65%. In contrast, March brings chillier temperatures, with a minimum of -5°C (23°F) and a maximum reaching 27°C (81°F), averaging only 8°C (47°F). Precipitation is significantly lower at 31 mm (1.2 in) across just 4 days, and humidity rises slightly to 70%. For more detailed information, you can check Xihu weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a mild 12°C (55°F) to a warm 32°C (90°F), with an average of 22°C (72°F). This month experiences higher precipitation at 82 mm (3.2 in) over about 8 days, along with a humidity level of 65%. In contrast, April has a cooler temperature range, with a minimum of 0°C (33°F) and a maximum of 31°C (88°F), leading to an average of just 13°C (56°F). Additionally, it sees less rainfall, totaling 37 mm (1.4 in) over 7 days, and a slightly higher humidity of 78%. For more detailed insights on the weather in April, check out Xihu weather in April.
When comparing the weather in September and May, several notable differences emerge. September typically enjoys warmer temperatures, with an average of 22°C (72°F) and maximum highs reaching 32°C (90°F). In contrast, May starts off cooler, with an average temperature of 19°C (67°F) and a maximum of 36°C (97°F). Nonetheless, May experiences lower humidity at 74%, compared to September's 65%, which may offer a slightly more comfortable atmosphere despite its warmth. Additionally, precipitation levels are higher in September, with 82 mm (3.2 in) over 8 days, while May sees less rainfall at 63 mm (2.5 in) across 7 days. For more detailed insights into May's weather, you can check Xihu weather in May.
When comparing the weather in September and June, both months exhibit warm temperatures, though June tends to be slightly hotter. In June, the average temperature reaches 23°C (74°F), with a maximum of 35°C (96°F), while in September, the average temperature dips to 22°C (72°F) with a maximum of 32°C (90°F). Precipitation levels are fairly similar, with June experiencing 86 mm (3.4 in) over 7 days and September seeing 82 mm (3.2 in) over 8 days. Additionally, humidity is higher in June at 74%, compared to September's 65%. For more detailed weather insights, you can explore Xihu weather in June.
The weather in September is generally milder compared to July, with average temperatures ranging from a minimum of 12°C (55°F) to a maximum of 32°C (90°F), while July experiences warmer conditions with a minimum of 18°C (64°F) and an average high of 37°C (99°F). Additionally, September has significantly less rainfall, with 82 mm (3.2 in) over 8 days, compared to July's heavier precipitation of 264 mm (10.4 in) spread across 14 days. Humidity levels are also notably different, with September at 65% and July peaking at 84%, making July feel more muggy and uncomfortable. For a detailed breakdown of July weather, refer to Xihu weather in July.
In comparing the weather of September and August, September presents a cooler and slightly less humid climate. The minimum temperature drops to 12°C (55°F) compared to August's 16°C (62°F), while the average temperature in September is 22°C (72°F), down from 26°C (80°F) in August. Interestingly, September has a maximum temperature of 32°C (90°F), which is lower than August's peak of 35°C (96°F). Additionally, September sees less precipitation, with 82 mm (3.2 in) over 8 days, whereas August experiences significantly more rain at 183 mm (7.2 in) across 16 days. The humidity also decreases in September to 65% compared to 81% in August. For more detailed information, you can check Xihu weather in August.
September typically features warmer weather than October, with average temperatures reaching 22°C (72°F) and maxing out at 32°C (90°F). It experiences more rainfall as well, with about 82 mm (3.2 in) of precipitation over 8 days. In contrast, October brings a noticeable chill, with average temperatures dropping to 15°C (59°F) and a minimum reaching just 3°C (37°F). Rainfall significantly decreases to 26 mm (1.0 in) across only 4 days, and humidity rises slightly to 72%. For a more detailed look at what to expect, check out Xihu weather in October.
In September, the weather is generally warm, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 32°C (90°F) and an average of 22°C (72°F). This month experiences more rainfall, with about 82 mm (3.2 in) of precipitation over 8 days and a humidity level of 65%. In contrast, November brings much cooler temperatures, with a minimum of -4°C (26°F), an average of 9°C (49°F), and a maximum of 24°C (76°F). Rainfall decreases significantly to only 24 mm (1.0 in) across just 3 days, while humidity rises to 81%. Overall, September is a month of warmth and notable rainfall, while November introduces chillier air and much drier conditions. For more detailed information, check Xihu weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a mild 12°C (55°F) to a warm 32°C (90°F), with an average of 22°C (72°F) and relatively high humidity at 65%. This month sees a notable amount of precipitation, averaging 82 mm (3.2 in) over about 8 days, indicating a wetter climate.
In contrast, December is much colder, with temperatures dropping significantly to a minimum of -13°C (9°F) and a maximum of 15°C (59°F), averaging just 2°C (36°F). Precipitation is also much lower, totaling only 14 mm (0.6 in) across 2 days. The humidity in December rises slightly to 71%, contributing to a crisp winter atmosphere. For more detailed insights on December weather, you can check Xihu weather in December.
As summer gracefully transitions into autumn, September in Xihu offers a refreshing blend of warmth and mildness, setting it apart from the preceding hotter months. The temperatures are much more inviting, with comfortable averages fostering pleasant outdoor activities. While it still experiences some rainfall, with about eight days of precipitation, the humidity levels remain moderate, creating a breath of fresh air following the sweltering summer. This beautiful balance makes September an ideal time to explore Xihu's scenic beauty. For a more detailed overview, check out the full information at Xihu Climate.