Last updated: August 21, 2025
In September, Xihu, China experiences a delightful transition into autumn, characterized by a maximum temperature of 36°C (97°F) and a comfortable average of 25°C (77°F). With a minimum dipping to 15°C (58°F), the weather is ideal for outdoor activities. However, residents should be prepared for an average precipitation of 111 mm (4.4 in) over approximately 10 rainy days, contributing to a humidity level of 73% that adds a refreshing touch to the atmosphere. Embrace this vibrant month as Xihu's natural beauty flourishes in the cooler, lush conditions of early fall.
In September, Xihu, China begins to transition from the sweltering summer months to a milder climate. With minimum temperatures settling at 15°C (58°F) and averages reaching a comfortable 25°C (77°F), it’s a pleasant time to explore the area. The peak temperatures can still soar to 36°C (97°F), reminding us of the lingering summer warmth. This month stands out as a turning point, where the scorching highs of August begin to ease, paving the way for October's cool embrace. Overall, September offers a delightful mix of warmth and inviting conditions, making it an ideal time for leisurely strolls around the picturesque West Lake while enjoying the changing hues of early autumn.
In September, Xihu, China, experiences a notable shift in precipitation patterns, recording 111 mm (4.4 inches) of rainfall over 10 days. This decrease follows the heavy rains of June and July, which both surpassed 300 mm, showcasing the region's peak wet season. As summer transitions to autumn, the rainfall tapers significantly, reflecting a change in climate dynamics. Compared to the preceding months, September's precipitation is relatively moderate, hinting at the onset of drier conditions as the year progresses. This trend highlights the seasonal variability typical of Xihu's weather, as it prepares for the cooler and less rainy months ahead.
In Xihu, China, September marks a significant shift in humidity as it drops to 73%, aligning with the levels typically seen in January and October. This decrease comes after a summer of heightened moisture, where humidities soared to 90% in July and remained high throughout August. The transition into September signals a gradual departure from the oppressive humidity of the peak summer months, making way for a more comfortable atmosphere as the region moves towards autumn. Notably, this trend reflects a cyclical pattern, with humidity levels ebbing and flowing throughout the year, culminating in a relatively dry September before the moisture returns with the onset of autumn.
As summer yields to autumn in Xihu, China, September marks a notable shift in the UV Index, which stands at 10, categorizing exposure as very high. This decrease from the extreme levels seen in the preceding months indicates a slight moderation, though caution is still essential, with a burn time of just 15 minutes. The trend reveals that while September retains residual intensity from the summer months, it offers a more manageable environment for outdoor activities. As September progresses, the UV levels continue to dip, paving the way for a gradual transition into the milder indices of fall. For those looking to plan their sun exposure wisely, it's crucial to stay informed via the Xihu UV Index.
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September brings a splendid continuation of summer's warmth to Xihu, China, with 265 hours of sunlight gracing the skies. Following the sunniest month of August, which boasted an impressive 312 hours, the light begins to wane as autumn approaches. Despite this decline, September remains radiant, significantly outshining the earlier months of the year like January and February, which only offered 160 and 202 hours respectively. This transition signals a shift in seasons, where the lingering summer days provide a beautiful backdrop for enjoying the rich natural beauty of Xihu, making September a perfect time for outdoor exploration and enjoyment.
In Xihu, China, September stands out as a particularly sunny month, featuring a 62% chance of clear skies. This marks a significant increase compared to the summer months, where the likelihood of sunshine hovers around 21% to 36%. As the season transitions, the sun starts to make a more consistent appearance, offering residents and visitors alike an opportunity to enjoy the outdoors. Interestingly, the chance of sunny weather in September rivals that of December and aligns with the bright potential we see at the beginning of the year. This trend suggests that September in Xihu is not only a beautiful time for exploring the natural scenery but also a peak moment for basking in the warmth of the sun before autumn fully sets in.
In Xihu, China, September marks a gentle transition as daylight begins to wane, offering about 12 hours of sunlight. This decline follows a peak in June, where the days stretch to a vibrant 14 hours, providing a bright summer experience. As the year progresses from the long days of May and June, daylight gradually diminishes, with September still enjoying significantly more sunlight than the winter months, which hover around 10 hours in January and November. This rhythmic fluctuation not only defines the natural cycle of the region but also sets the stage for the cozy atmosphere of autumn as longer evenings draw in.
In September, Xihu, China, experiences an average wind speed of 2.0 m/s (5 mph), marking a period of calm before the seasonal shifts. As summer winds down, the breeze remains gentle, mirroring the steady flow of earlier months like January through April, which consistently hover around 2.1 m/s. However, the pace picks up slightly in October, with winds reaching 2.7 m/s (6 mph), suggesting a transitional shift as autumn approaches. While July stands out with the strongest gusts at 2.4 m/s, this month serves as a reminder of summer's warmth, as the wind begins to mellow into the cooler months of November and December, both averaging 2.0 m/s. Overall, September's moderate winds create a serene backdrop, inviting contemplation and connection with nature as the landscape subtly transforms.
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 stark contrasts in weather conditions. In September, temperatures range from a minimum of 15°C (58°F) to a maximum of 36°C (97°F), with an average of 25°C (77°F). This month also sees considerable rainfall, with 111 mm (4.4 in) of precipitation over about 10 days and humidity levels averaging around 73%. Conversely, January experiences chillier weather with minimum temperatures dropping to -6°C (21°F) and a maximum of 21°C (71°F), averaging just 6°C (43°F). The precipitation decreases to 73 mm (2.9 in) spread across 8 days, and humidity remains relatively lower at 69%. For a closer look at January conditions, you can check Xihu weather in January.
September and February present striking contrasts in weather patterns. In September, temperatures range from a pleasant 15°C (58°F) at night to a sweltering 36°C (97°F) during the day, with an average temperature of 25°C (77°F). This month also brings significant rainfall, totaling 111 mm (4.4 in) over about 10 days, accompanied by high humidity levels of 73%.
In contrast, February experiences much cooler temperatures, with nighttime lows dropping to -3°C (27°F) and daytime highs reaching 25°C (77°F), averaging around 8°C (46°F). The month sees slightly less precipitation than September, at 90 mm (3.5 in) over about 11 days, while maintaining the same high humidity of 73%. For more detailed insights on February weather, you can visit Xihu weather in February.
In comparing the weather between September and March, we see significant differences in temperature and precipitation. September enjoys warmer temperatures, with lows around 15°C (58°F) and highs reaching up to 36°C (97°F), making it a much warmer month overall, with an average of 25°C (77°F). However, it also experiences around 111 mm (4.4 in) of precipitation over approximately 10 days and a humidity level of 73%.
In contrast, March tends to be cooler, with temperatures ranging from a chilly 1°C (34°F) to a milder 28°C (83°F), averaging around 13°C (56°F). The month sees more substantial rainfall, totaling 184 mm (7.3 in) over 16 days, accompanied by higher humidity at 82%. For a more detailed look at what to expect during this time, you can check Xihu weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 15°C (58°F) to a maximum of 36°C (97°F), with an average of 25°C (77°F). The month sees about 111 mm (4.4 in) of precipitation over approximately 10 days, accompanied by a humidity level of 73%. In contrast, April experiences cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 31°C (89°F), averaging 17°C (64°F). It also has higher precipitation at 172 mm (6.8 in) across 13 days, coupled with increased humidity at 86%. For more detailed information on April weather, you can check Xihu weather in April.
September typically experiences warmer average temperatures compared to May, with a minimum of 15°C (58°F) and a maximum reaching up to 36°C (97°F), while May has a minimum of 12°C (54°F) and a maximum of 34°C (94°F). However, May is characterized by significantly higher precipitation levels, averaging 238 mm (9.4 in) over 15 days, in contrast to September's 111 mm (4.4 in) over 10 days. Additionally, May tends to have higher humidity at 86%, compared to 73% in September. For a detailed look at the weather conditions in May, you can check Xihu weather in May.
When comparing the weather in September and June, both months exhibit similar average temperatures around 25°C (77°F), with June experiencing slightly cooler minimum temperatures of 16°C (61°F) compared to September's 15°C (58°F). However, September tends to have a higher maximum temperature of 36°C (97°F) versus June's peak of 35°C (95°F). A significant difference is noted in precipitation: June is much wetter with 403 mm (15.9 in) of rain over 19 days, while September sees only 111 mm (4.4 in) across 10 days. Furthermore, humidity levels are higher in June at 86%, compared to September's 73%. For a closer look at June's conditions, you can check out Xihu weather in June.
When comparing July and September weather, July experiences higher temperatures with an average of 28°C (83°F) and a maximum reaching 39°C (103°F), whereas September sees slightly cooler averages at 25°C (77°F) and a peak of 36°C (97°F). July also exhibits greater rainfall, with a total of 349 mm (13.7 in) over 16 days compared to September's 111 mm (4.4 in) across 10 days, leading to higher humidity levels of 90% in July, versus 73% in September. For a more detailed look at the summer conditions, you can explore Xihu weather in July.
In comparison to August, September experiences slightly cooler temperatures, with a minimum of 15°C (58°F) and an average of 25°C (77°F), compared to August's minimum of 18°C (65°F) and average of 29°C (84°F). The maximum temperature also decreases in September to 36°C (97°F), down from August's high of 39°C (102°F). Additionally, September receives less precipitation, totaling 111 mm (4.4 in) over 10 days, whereas August sees heavier rainfall at 171 mm (6.7 in) across 13 days. Humidity is lower in September at 73%, in contrast to the more humid August, which averages 86%. For more details about the weather in August, visit Xihu weather in August.
September and October exhibit a notable transition in weather patterns. In September, temperatures range from a minimum of 15°C (58°F) to a maximum of 36°C (97°F), with an average of 25°C (77°F). The month also experiences significant precipitation, totaling 111 mm (4.4 in) over 10 days, while the humidity remains high at 73%.
In contrast, October sees cooler temperatures, starting at a minimum of 7°C (46°F) and peaking at 35°C (95°F), with an average of 19°C (66°F). Rainfall is much lighter, accumulating to just 30 mm (1.2 in) over 6 days, yet humidity remains consistent at 73%. This shift signifies a transition from the warmth and humidity of late summer to the cooler, drier conditions of autumn. For more detailed weather insights, visit Xihu weather in October.
September and November present contrasting weather characteristics. September enjoys warmer temperatures, with daily averages around 25°C (77°F) and maximums soaring up to 36°C (97°F), while humidity levels are relatively high at 73%. In contrast, November experiences a significant drop in temperatures, averaging 14°C (57°F) and peaking at 28°C (82°F), with a minimum temperature of just 2°C (35°F). Additionally, November sees less precipitation, totaling 48 mm (1.9 in) over 9 days, compared to September’s 111 mm (4.4 in) across 10 days. For those interested in weather specifics, you can check out Xihu weather in November.
September weather is characterized by warmer temperatures, with a minimum of 15°C (58°F), an average of 25°C (77°F), and a peak at 36°C (97°F). The month experiences significant rainfall, totaling 111 mm (4.4 in) over about 10 days, with a humidity level of 73%. In contrast, December brings much cooler conditions, featuring a minimum temperature of -3°C (27°F), an average of 7°C (46°F), and a maximum of 21°C (70°F). Precipitation is lighter during this month, totaling 53 mm (2.1 in) across 7 days, while humidity rises slightly to 79%. For more details on December weather in this region, you can visit Xihu weather in December.
As summer transitions into autumn, September in Xihu offers a refreshing change from the sweltering heat of previous months. With a comfortable average temperature around 25°C, this month encourages outdoor exploration, while the occasional rainfall—totaling 111 mm over about 10 days—nurtures the lush landscapes. The humidity level remains notable at 73%, adding a touch of mugginess that reminds us summer isn't quite over yet. Overall, September presents a pleasant balance, making it an ideal time to appreciate the region's beauty before the cooler months set in. For more detailed information on weather patterns, visit Xihu Climate.