Last updated: August 21, 2025
In September, Hongzhou, China experiences a dynamic climate characterized by a maximum temperature soaring to 38°C (100°F), while the average remains a comfortable 25°C (77°F). However, the month is also marked by a refreshing dip in temperatures, with minimums around 16°C (60°F), offering a pleasant relief from the heat. Rainfall is a notable feature, with total precipitation reaching 128 mm (5.0 in) over approximately 12 days, contributing to a relative humidity of 70%. This blend of warmth and occasional showers makes September a vibrant time in Hongzhou, perfect for experiencing the region's lush landscapes and cultural offerings.
In September, Hangzhou experiences a delightful transition, with temperatures ranging from a minimum of 16°C (60°F) to a peak of 38°C (100°F), making it one of the warmest months of the year. The average temperature of 25°C (77°F) creates a pleasant backdrop for outdoor activities, as the lingering warmth of summer begins to blend seamlessly with the cooler autumn air on the horizon. As September unfolds, residents and visitors alike can enjoy the vibrant hues of the city’s landscape before the significant drop in temperatures that follows in October. This month stands out as a bridge between extremes, showcasing Hangzhou's dynamic climate.
September in Hangzhou, China, marks a transitional phase in the year's precipitation pattern, with 128 mm (5.0 in) of rainfall spread across 12 days. Following the heavy deluge of summer, which peaked in June with a striking 370 mm (14.6 in), September sees a noteworthy moderation in rainfall. Despite a decrease from August's 85 mm, the month maintains a steady level of moisture essential for the lush landscapes of the region. This balance of rainfall not only supports the vibrant local ecosystem but also hints at the onset of autumn, as the city prepares for a shift in weather with 100 mm (3.9 in) projected in October. Overall, September serves as a bridge, balancing the remnants of summer's storms with the cool, crisp air to come.
As the summer heat wanes, September in Hongzhou experiences a noticeable dip in humidity, dropping to 70%. This marks a significant decline from the sweltering heights of 89% in July and 88% in June, providing a refreshing reprieve for residents and visitors alike. Following the humid months of May through August, September signals the beginning of a transitional phase in climate, where the air becomes less oppressive. Interestingly, this month's humidity level mirrors that of October, suggesting a trend toward more comfortable conditions as the region heads into the autumn months. While still higher than the earlier months of the year, including January at 64% and February at 73%, September's relative decrease indicates a shift toward cooler and more enjoyable weather ahead.
In September, Hongzhou, China, continues to experience a significant level of sun exposure, with a UV Index of 11, categorized as extreme. This month marks a slight decrease from the peak summer months, yet still demands attention, as the burn time is a mere 10 minutes. This trend of rising UV levels from the beginning of the year peaks in May and July with an index of 13, before tapering off slightly in September. It’s essential for residents and visitors alike to remain vigilant about sun safety during this period. For more detailed information, you can check the Hongzhou UV Index.
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As the summer warmth lingers into September in Hongzhou, the city basks in an impressive 260 hours of sunshine, marking a radiant close to the season. This month stands out against the cooler backdrop of the year's earlier months, showcasing a steady increase in sunlight that peaks in August with 308 hours. The trend is clear: from the depths of winter with just 141 hours in January, the sunshine steadily builds through spring and summer, reaching a peak in the sultry summer months before gracefully transitioning into the more subdued light of autumn. September's generous hours remind us of the vibrant days of summer while setting the stage for the softer hues of October, which sees a decrease to 196 hours. Here in Hongzhou, the sun's journey not only illuminates the city but also marks the changing seasons with each passing hour.
September in Hongzhou, China, typically brings a refreshing shift in weather, with a 49% chance of sunny days—one of the highest probabilities throughout the year. This increase marks a notable departure from the summer months, where the likelihood of sunshine hovers around 28% to 29%. As the sweltering heat of July and August gives way to the mellower warmth of early autumn, residents and visitors alike can expect more favorable outdoor conditions. Following a relatively cloudy spring, September's sunnier disposition invites opportunities for exploration and enjoyment in the city's vibrant landscapes. Overall, this month stands out as a key transition point, hinting at the approaching cooler temperatures of autumn without sacrificing the sun-soaked days that many cherish.
As the summer sun retreats in September, Hongzhou, China, experiences a gentle decline in daylight, offering around 12 hours of light each day. This month marks a transition from the peak brightness of summer, where daylight extended to a generous 13 hours from May to August. Following September, daylight continues to diminish as autumn settles in, with daylight dipping to 11 hours in October and then to 10 hours by November. The rhythm of daylight in Hongzhou illustrates a beautiful cycle of seasonal change, inviting residents to embrace the crispness of fall while reflecting on the longer days of summer.
In September, Hongzhou experiences a gentle breeze, with average wind speeds dipping to 2.4 m/s (5 mph), the lowest of the year. This calming atmosphere sets the stage for a serene transition into autumn. As summer winds peak in July and August at 3.0 m/s (7 mph), September's breeze offers a refreshing respite, inviting residents and visitors alike to enjoy the scenic outdoors. The trend of gradually increasing wind speeds leading into the fall culminates in a notable uptick come October, when gusts pick up to 3.9 m/s (9 mph), perfectly capturing the dynamic shift in the season. This seasonal ebb and flow not only shapes the natural landscape but also enhances the charm of Hongzhou during these picturesque months.
Weather in Hongzhou varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hongzhou, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warm, with average temperatures around 25°C (77°F) and maximums reaching up to 38°C (100°F). This month also experiences considerable humidity at 70% and sees around 128 mm (5.0 in) of precipitation over approximately 12 days, creating a tropical feel. In contrast, January presents a much cooler climate, with an average temperature of 6°C (43°F) and lows dropping to -4°C (26°F). Rainfall is lighter, totaling about 66 mm (2.6 in) across 11 days, and humidity is slightly lower at 64%. For more detailed insights, you can check Hongzhou weather in January.
In September, temperatures range significantly from a mild 16°C (60°F) at night to a scorching 38°C (100°F) during the day, making it one of the warmer months of the year. With an average temperature of 25°C (77°F), the month also sees a considerable amount of precipitation, with 128 mm (5.0 in) spread over 12 rainy days and a humidity level of 70%.
In contrast, February experiences much cooler conditions, with minimum temperatures dipping as low as -3°C (27°F) and a maximum reaching 27°C (80°F). The average temperature sits at a chilly 8°C (47°F), accompanied by a slightly lower precipitation total of 114 mm (4.5 in) over 13 days, and humidity remains relatively high at 73%. For a detailed look at February weather specifics, visit Hongzhou weather in February.
September and March exhibit significantly different weather patterns. In September, temperatures typically range from a mild 16°C (60°F) at night to a scorching maximum of 38°C (100°F), with an average of 25°C (77°F). This month experiences moderate rainfall, totaling 128 mm (5.0 in) over about 12 days, with humidity levels around 70%. In contrast, March brings much cooler temperatures, with a minimum of 3°C (38°F) and an average of only 13°C (56°F), peaking at 29°C (84°F). Precipitation in March is more substantial, reaching 213 mm (8.4 in) over 20 days, accompanied by higher humidity at 78%. For a detailed look at March conditions, you can visit Hongzhou weather in March.
When comparing the weather in September and April, it's clear that both months have distinct characteristics. September typically features warmer temperatures, with a minimum of 16°C (60°F) and an average of 25°C (77°F), reaching highs of up to 38°C (100°F). In contrast, April is cooler, with a minimum temperature of 7°C (44°F) and an average of 17°C (63°F), peaking at 31°C (87°F).
Precipitation levels also differ; September experiences 128 mm (5.0 in) across 12 days, while April sees a higher total of 240 mm (9.4 in) spread over 20 days. The humidity is slightly lower in September at 70%, compared to April's 78%. Overall, September is hotter and less wet, while April tends to be cooler and wetter. For a more detailed look at the April weather, visit Hongzhou weather in April.
September and May present distinctly different weather patterns. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 38°C (100°F), with an average of 25°C (77°F). The month has moderate precipitation of 128 mm (5.0 in) spread over 12 days, and humidity levels are around 70%. In contrast, May experiences cooler temperatures with a minimum of 11°C (52°F) and a maximum of 34°C (93°F), averaging at 22°C (71°F). However, it is a much wetter month, receiving 312 mm (12.3 in) of rain over 21 days, accompanied by higher humidity at 87%. For more details on May's weather, check out Hongzhou weather in May.
When comparing the weather in September and June, both months have similar minimum and average temperatures, typically starting around 16°C (60°F) and averaging 25°C (77°F). However, June is notably warmer at its peak, reaching a maximum of 35°C (95°F) compared to September's high of 38°C (100°F). Rainfall also varies significantly, with June experiencing much heavier precipitation at 370 mm (14.6 in) over 19 days, while September sees only 128 mm (5.0 in) across 12 days. Additionally, June tends to be more humid, averaging around 88%, compared to September's 70%. For more detailed insights, you can explore Hongzhou weather in June.
When comparing the weather in September and July, September generally offers slightly cooler temperatures, with a minimum of 16°C (60°F) and an average of 25°C (77°F), compared to July's minimum of 19°C (66°F) and an average of 27°C (82°F). Although both months experience considerable humidity—70% in September versus a higher 89% in July—July typically sees more precipitation, with 242 mm (9.5 in) falling over 14 days, as opposed to September's 128 mm (5.0 in) over 12 days. For a more detailed look at July's weather patterns, check out Hongzhou weather in July.
In comparison to August, September experiences slightly cooler temperatures, with average highs dropping from 39°C (103°F) to 38°C (100°F) and average lows decreasing from 20°C (69°F) to 16°C (60°F). While September has a higher average precipitation of 128 mm (5.0 in) over 12 days, August recorded 85 mm (3.4 in) of rainfall over 13 days, suggesting that September may have brief but more intense rainfall. Additionally, the humidity levels in August are notably higher at 87%, compared to September's 70%, making September feel more comfortable overall. For more insights on August weather, you can visit Hongzhou weather in August.
In September, the weather is significantly warmer, with average temperatures around 25°C (77°F) and highs reaching up to 38°C (100°F). This month also experiences more rainfall, totaling 128 mm (5.0 in) over approximately 12 days, while the humidity remains consistently high at 70%. In contrast, October sees a notable drop in temperature, with averages around 18°C (65°F) and maximums of 35°C (95°F). Precipitation decreases to 100 mm (3.9 in) over 11 days, but the humidity stays the same at 70%. For more specific details on October weather, you can check Hongzhou weather in October.
September and November present quite a contrast in weather. In September, temperatures range from a minimum of 16°C (60°F) to a hot maximum of 38°C (100°F), with an average temperature of 25°C (77°F). The month also experiences significant rainfall, with 128 mm (5.0 in) falling over 12 days and humidity levels at around 70%. In stark contrast, November sees much cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 27°C (80°F), averaging only 13°C (56°F). While precipitation decreases to 103 mm (4.0 in) across 13 days, humidity levels rise slightly to 79%. For more detailed insights into the weather patterns in November, you can check Hongzhou weather in November.
September and December present starkly contrasting weather conditions. In September, temperatures typically range from a minimum of 16°C (60°F) to a maximum of 38°C (100°F), with an average of 25°C (77°F). The month is characterized by significant rainfall, accumulating 128 mm (5.0 in) over about 12 days, along with a relatively high humidity level of 70%. In contrast, December experiences much cooler temperatures, with a minimum of -4°C (25°F), an average of 8°C (46°F), and a maximum of 23°C (74°F). Precipitation decreases to 62 mm (2.5 in) over only 10 days, while humidity remains similar at 72%. For more detailed information, you can visit Hongzhou weather in December.
In September, Hongzhou experiences a significant transition, blending the lingering warmth of summer with the approaching coolness of autumn. With an average temperature hovering around a comfortable 25°C (77°F), this month marks a shift from the intense heat characteristic of the peak summer months, where maximum temperatures can soar up to 38°C (100°F). Frequent rain, totaling 128 mm over roughly 12 days, brings a refreshing change to the usually humid climate, which sits at around 70%. This combination of warmth and moisture creates a lush environment, making September an ideal time for visitors to enjoy the natural beauty of the region. For more insights on the weather patterns throughout the year, explore Hongzhou Climate.