Last updated: August 21, 2025
September in Xihu, China showcases a transition into mild autumn weather, with temperatures typically ranging from a maximum of 31°C (87°F) to a minimum of 6°C (42°F), averaging around 16°C (61°F). Visitors can expect a moderate level of humidity at 87%, which, combined with 70 mm (2.8 in) of precipitation over 12 days, creates a refreshing atmosphere. This month is marked by unpredictable showers, making it an ideal time for those who enjoy the interplay of warm days and cool evenings amidst the stunning natural beauty of Xihu.
In September, Xihu, China, experiences a transition from the summer heat to the early hints of autumn. The minimum temperature reaches a mild 6°C (42°F), while the average temperature settles at a comfortable 16°C (61°F), offering a welcome reprieve from the sweltering summer months. During this time, Xihu enjoys pleasantly warm days, with maximum temperatures peaking at 31°C (87°F), illustrating a gradual decline from the high temperatures of July and August. This month serves as a bridge, where warm afternoons encourage outdoor activities, yet the cooling evenings remind residents of the approaching fall. Overall, September is characterized by moderate temperatures that make it an ideal time for exploration and enjoying the vibrant natural beauty of the region as summer wanes.
September in Xihu, China, experiences a notable shift in precipitation patterns as the region transitions from the peak summer rains. With 70 mm (2.8 in) of rainfall over 12 days, it reflects a decrease from the intense 125 mm (4.9 in) recorded in August, yet still remains significant enough to nourish the lush landscape. The rainfall starts to taper off, foreshadowing the arrival of autumn, while the number of precipitation days remains relatively high, maintaining the moisture levels essential for crops. This month acts as a bridge between the abundant summer rains and the drier autumn months, highlighting the seasonal transitions in Xihu's climate.
In September, Xihu, China, experiences a notable increase in humidity, reaching an average of 87%. This marks the transition toward the autumn months, following a peak in humidity during August at 86%. The gradual ascent from the drier conditions in May and June highlights a consistent trend of rising moisture levels as the year progresses. As temperatures begin to moderate with the onset of autumn, the lingering humidity from the summer months creates a unique atmospheric blend, making September one of the more humid times of the year in Xihu. Observing the trend throughout the year, it's clear that while the coastal climate offers some relief in winter, humidity remains a hallmark of the region from late spring through early autumn.
As the seasons transition in Xihu, China, September marks a notable shift in the UV Index. With a UV Index of 10, categorized as very high, residents and visitors alike should be cautious, as the burn time decreases to just 15 minutes. This trend reflects the lingering effects of summer, where months of extreme UV levels—peaking at 12 from May through August—gradually begin to subside. However, even as temperatures start to cool, September reminds us to stay vigilant in sun protection. For detailed insights into UV levels throughout the year, check the Xihu UV Index.
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As summer gracefully transitions into autumn, September in Xihu, China, continues to bask in ample sunlight, with 285 hours of sunshine—a figure that reflects a steady and welcoming glow. This marks a slight decline from the sun-soaked peak of 348 hours in July, yet it’s still significantly more luminous than the chillier months ahead. Overall, this month bridges the gap between the vibrant warmth of high summer and the cooler days of fall, inviting both locals and travelers to enjoy the scenic beauty of Xihu’s landscapes bathed in that generous September sunshine. As the year progresses, the trend shows a gradual decrease in daylight hours, hinting at the enchanting rhythms of nature that shift throughout the seasons.
In Xihu, China, the likelihood of sunny weather tends to fluctuate throughout the year, with September offering a moderate 47% chance of sunshine. As summer transitions to autumn, this percentage stands out as a slight improvement compared to the preceding months, particularly June and April, when the likelihood drops to 31% and 34%, respectively. While the sunny days peak dramatically in winter months like November (78%) and January (61%), September provides a delightful balance for those seeking outdoor activities, sitting comfortably in the middle of the yearly spectrum. This transitional period is an inviting time for visitors eager to experience pleasant weather before the cooler months set in.
In Xihu, China, the month of September marks a transition in daylight duration, with the sun gracing the sky for approximately 12 hours each day. This decline from the peak of 14 hours experienced in the summer months reflects nature's gradual shift towards shorter days as autumn approaches. Following a steady increase in daylight from January's modest 9 hours, Xihu enjoys a vibrant spring and summer filled with abundant sunshine, peaking in May through July. However, as September rolls in, the gradual decrease signals the impending cooler months, with daylight further reducing to 11 hours in October. This gentle ebb in daylight not only hints at the changing seasons but also invites the beauty of autumn to unfold in Xihu's scenic landscape.
As September unfolds in Xihu, China, the gentle caress of the wind lingers at an average speed of 1.9 m/s (4 mph). This slight dip from the summer months reflects a subtle transition towards the cooler autumn season. While higher averages in late spring and summer reached 2.2 m/s (5 mph), September’s breezes feel more subdued compared to the vibrancy earlier in the year. It marks a harmonious blend of warmth lingering from summer and the crispness of autumn approaching. As the winds decrease gradually into October and November, with averages dropping to 1.7 m/s (4 mph), it signals a shift towards the tranquil calm of winter, emphasizing nature's rhythmic clockwork in Xihu’s ever-changing landscape.
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 a stark contrast in weather conditions. In September, temperatures fluctuate significantly, ranging from a cool minimum of 6°C (42°F) to an average of 16°C (61°F) and peaking at 31°C (87°F). The month experiences a total precipitation of 70 mm (2.8 in) over about 12 days, with high humidity levels at 87%, creating a muggy atmosphere. In contrast, January is marked by much harsher conditions, with temperatures dipping down to a minimum of -19°C (-2°F) and averaging around -5°C (23°F), while the maximum only reaches 13°C (55°F). Rainfall is minimal at 6 mm (0.2 in) over just 2 days, and humidity is lower at 81%. For a closer look at January weather specifics, visit Xihu weather in January.
September and February present stark contrasts in weather. September boasts a broad temperature range, with a minimum of 6°C (42°F) and a maximum of 31°C (87°F), allowing for pleasant, warm days and cooler evenings. This month experiences relatively high humidity at 87% and sees about 70 mm (2.8 in) of precipitation over 12 days, suggesting a mix of sunshine and occasional rain.
In sharp contrast, February exhibits much harsher conditions, characterized by frigid temperatures that dip as low as -21°C (-5°F), with an average of -2°C (29°F) and a maximum of only 17°C (63°F). While it is drier than September, February receives just 7 mm (0.3 in) of precipitation over a mere 2 days, and the humidity is slightly lower at 85%. For more insights into the February climate in this region, you can check Xihu weather in February.
September and March present quite contrasting weather conditions. In September, temperatures range from a mild 6°C (42°F) to a warm 31°C (87°F), with an average of 16°C (61°F). The month experiences about 70 mm (2.8 in) of precipitation over roughly 12 days, and humidity levels hover around 87%, contributing to a humid atmosphere.
In contrast, March is significantly cooler, with temperatures dipping as low as -11°C (13°F) and peaking at 26°C (79°F). The average temperature stands at a brisk 6°C (43°F), and precipitation is much lower at 14 mm (0.5 in) over just 3 days. Humidity remains fairly high at 85%, but the overall feel is much drier compared to September. For more details on the weather in March, you can refer to this link: Xihu weather in March.
When comparing the weather in September and April, there are notable differences in temperature and precipitation. September tends to be warmer, with average temperatures around 16°C (61°F), compared to April's cooler average of 11°C (52°F). Both months can reach highs of 31°C (87°F), but April experiences lower minimum temperatures, dipping down to -6°C (21°F), while September's minimum is a milder 6°C (42°F). Additionally, September sees more rainfall, with 70 mm (2.8 inches) over 12 days, compared to April’s 40 mm (1.6 inches) over 9 days. Humidity levels are slightly higher in September at 87%, compared to 83% in April. For more detailed information about April weather, you can check Xihu weather in April.
In comparing the weather of September and May, both months feature similar average temperatures, around 16°C (61°F) and 16°C (60°F) respectively, but their temperature ranges differ slightly. September experiences a broader temperature range, with minimums reaching 6°C (42°F) and maxima up to 31°C (87°F), while May has a cooler minimum of 3°C (37°F) and a slightly warmer maximum of 32°C (90°F). Additionally, September tends to be wetter, with 70 mm (2.8 in) of precipitation over 12 days, compared to May's 51 mm (2.0 in) over just 7 days. Humidity levels are also higher in September at 87%, compared to 78% in May. For a detailed look at specific conditions, you can check Xihu weather in May.
When comparing the weather in September and June, we can see that both months offer mild to warm temperatures, but with some notable differences. September typically has a broader temperature range, with minimums dropping as low as 6°C (42°F) and maximums reaching up to 31°C (87°F), resulting in an average of 16°C (61°F). In contrast, June experiences slightly warmer conditions, with minimum temperatures at 8°C (46°F) and maximums peaking at 32°C (91°F), leading to an average temperature of 20°C (67°F).
Additionally, September is characterized by higher humidity levels at 87%, compared to June's 80%. Although September sees more precipitation overall with 70 mm (2.8 in) across 12 days, June is drier with 58 mm (2.3 in) over just 9 days. For a closer look at June's weather specifics, check out Xihu weather in June.
When comparing the weather in September to that of July, we notice significant differences in temperature and precipitation. September experiences a broader temperature range, with minimums dropping to 6°C (42°F) and maximums reaching 31°C (87°F), while the average temperature is a cooler 16°C (61°F). In contrast, July is warmer overall, with a minimum of 11°C (53°F), an average of 22°C (72°F), and maximums soaring to 36°C (97°F). Additionally, September has slightly less rainfall at 70 mm (2.8 in) over 12 days compared to July's 81 mm (3.2 in) over 11 days. Interestingly, despite these differences, September boasts a higher humidity level at 87%, compared to July's 82%. For a detailed look at July's weather, you can check Xihu weather in July.
In September, temperatures are cooler, with a minimum of 6°C (42°F) and an average of 16°C (61°F), compared to the higher temperatures in August, which sees minimums of 10°C (50°F) and an average of 20°C (68°F). The maximum temperature in September peaks at 31°C (87°F), while August reaches up to 35°C (95°F). Additionally, September experiences slightly less precipitation at 70 mm (2.8 in) over 12 days, whereas August is wetter with 125 mm (4.9 in) across 13 days. Humidity remains similar, with September at 87% compared to August's 86%. For more details on the weather in August, you can check Xihu weather in August.
September's weather features a wider temperature range, with minimums at 6°C (42°F) and maximums peaking at 31°C (87°F). The month experiences an average temperature of 16°C (61°F) and receives 70 mm (2.8 in) of precipitation over 12 days, alongside high humidity at 87%. In contrast, October sees cooler temperatures, with minimums dropping to -1°C (30°F) and an average of 9°C (48°F), while maximums reach 27°C (80°F). This month records less precipitation at 48 mm (1.9 in) over 9 days and a slightly higher humidity of 88%. For more details about the weather in October, check out Xihu weather in October.
In September, the weather is relatively warm with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 31°C (87°F) and an average of 16°C (61°F). This month experiences approximately 70 mm (2.8 in) of precipitation over 12 days, coupled with high humidity at 87%. In contrast, November sees much colder temperatures, with a minimum of -13°C (10°F) and an average of 2°C (36°F), peaking at 20°C (69°F). Precipitation drops significantly to just 12 mm (0.5 in) over only 3 days, and humidity remains relatively stable at 86%. For more details about the weather in November, you can check Xihu weather in November.
In September, the weather is characterized by a broad temperature range, with minimums around 6°C (42°F) and maximums reaching up to 31°C (87°F), creating warm days and mild evenings. This month sees an average temperature of 16°C (61°F) and a relatively high humidity level of 87%, accompanied by 70 mm (2.8 in) of precipitation over 12 days.
In stark contrast, December features much colder temperatures, with minimums plunging to -18°C (1°F) and maximums only reaching 12°C (54°F), resulting in an average of -4°C (25°F). The precipitation drops significantly to just 5 mm (0.2 in) over 1 day, amidst a lower humidity level of 78%. For a more detailed look at the winter conditions, check out Xihu weather in December.
As September arrives in Xihu, the weather undergoes a subtle transition, marked by a noticeable drop in temperatures compared to the sweltering summer months. With maximums around 31°C, the warmth still lingers, but the cooler average of 16°C offers a refreshing contrast as early autumn settles in. This month is also characterized by increased humidity levels at 87%, which, combined with 70 mm of precipitation over 12 days, creates a dynamic atmosphere, often leading to unexpected rainfall that refreshes the surroundings. This blend of warmth and moisture highlights the unique charm of September in Xihu, making it a time of vibrant change. For more insights into the climate, visit Xihu Climate.