Last updated: August 21, 2025
In September, the weather in Suzhou, China showcases a delightful blend of warm temperatures and seasonal rain. Daytime highs can reach a maximum of 34°C (93°F), while the average temperature hovers around a comfortable 25°C (78°F). The coolness of the evenings brings a refreshing minimum of 17°C (63°F). However, this month also experiences significant precipitation, with an accumulated total of 143 mm (5.6 in) falling over approximately 12 days. The atmosphere is often humid, with levels around 81%, creating a lush, vibrant environment that characterizes this charming city during the early autumn months.
In September, Suzhou transitions into a warm early autumn, showcasing a delightful range of temperatures. The minimum temperature settles at a comfortable 17°C (63°F), while the average climbs to 25°C (78°F), offering a pleasant escape from the summer heat. The season peaks with a maximum temperature reaching 34°C (93°F), keeping the days feeling quite warm but more bearable than the sweltering heat of July and August. As the month progresses, residents and visitors can enjoy outdoor activities amidst milder evenings, highlighting a perfect blend of warmth and refreshing breezes that herald the change of seasons.
September in Suzhou brings a notable shift in precipitation patterns, with 143 mm (5.6 in) of rainfall accumulated over 12 days. This marks a decrease from the summer months, yet it remains significant compared to earlier fall averages. The post-summer transition offers a respite from the heavy monsoon downpours experienced in July (272 mm) and August (171 mm), showcasing an intriguing dynamic where September balances moisture without overwhelming the landscape. As the city gears up for the drier months ahead, the autumn air is often filled with a refreshing blend of lingering humidity and the promise of cooler temperatures. This subtle yet impactful change contributes to Suzhou's evolving seasonal character, hinting at the beautiful shifts that lie ahead.
In September, humidity in Suzhou, China, settles at a comfortable 81%, marking a noticeable dip from the peak summer months when it soared to 93% in July and 91% in August. This decline signals the gradual transition from the sweltering heat of summer to more moderate autumn conditions. While September's levels remain higher than the annual average, they reflect a slight easing, allowing for more pleasant outdoor experiences. As the year progresses, humidity will continue to fluctuate, tapering off further into the cooler months ahead.
In September, Suzhou experiences a very high UV Index of 10, signaling a critical time for sun protection as the burn time is notably short at just 15 minutes. This month marks a transition from the extreme levels seen in the peak summer months of June, July, and August, where the UV Index consistently reached 11. As summer gives way to autumn, September’s UV levels remain high, continuing a trend of increasing solar intensity from the earlier months of the year. Starting from January with a more moderate UV Index of 5, there’s a clear upward trajectory, peaking in the summer before slightly tapering off. As we move into autumn, it's crucial to stay vigilant about sun exposure. For more information, check out Suzhou UV Index.
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September in Suzhou, China, shines brightly with an impressive 256 hours of sunshine, continuing the warm glow of summer. This month sees a slight dip from the sun-drenched heights of August, which basked in 308 hours of radiant light. As autumn begins to unfurl, September retains a substantial amount of sunshine, contributing to a year that peaks in luminosity during the peak summer months of July and August. Notably, the trend reveals a gradual decline in sunlight as the year progresses, with the winter months of January and February experiencing significantly less sunshine. Thus, while September marks a transitional phase, it still offers a generous helping of sunlight that invites residents and visitors alike to enjoy the fading warmth before the cooler days settle in.
September in Suzhou, China, presents a refreshing shift in weather patterns, with the likelihood of sunny days sitting at 49%. This is a notable increase from the summer months, where sunshine is more elusive, particularly in July, which sees a mere 17% chance. As the summer heat wanes, September offers a balance, allowing residents and visitors to enjoy more sun-kissed days compared to the dreary and cloudy weeks of June. While the chances of sunshine are still less than November's and December's promising forecasts, September's moderate sunshine makes it an inviting time to explore the city before autumn fully sets in.
In Suzhou, China, the rhythm of daylight shifts dramatically throughout the year, creating a fascinating tapestry of light and dark. As September arrives, the city enjoys 12 hours of daylight, bringing a subtle transition from the longer days of summer. This month marks a gentle decline from the peak of 14 hours in June, followed by a brief plateau in August before daylight hours taper off again. The trend showcases a gradual decrease as autumn approaches, with daylight shrinking further to 11 hours in October. This cyclical pattern not only highlights the interplay of seasons but also invites residents and visitors alike to embrace the softening glow of early autumn in Suzhou.
As September sweeps into Suzhou, the winds pick up a gentle pace, averaging 3.9 m/s (9 mph), echoing the calm breezes of the earlier months. This steady windspeed is reminiscent of spring and early summer, where October and November maintain a consistent flow, suggesting a transitional phase in the weather pattern. Notably, September's wind is a pleasant shift from August's lighter gales of 3.2 m/s (7 mph), making outdoor activities all the more inviting. The return to a more robust breeze hints at the approaching autumn, setting the stage for the cooler, crisper days ahead. Overall, September’s winds encapsulate a perfect balance, bridging the summery warmth with the refreshing spirit of fall.
Weather in Suzhou varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Suzhou, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild 17°C (63°F) at night to a sizzling maximum of 34°C (93°F) during the day, accompanied by high humidity levels of 81% and notable rainfall of 143 mm (5.6 in) over 12 days. In contrast, January brings winter chill, with temperatures plummeting to a minimum of -7°C (20°F) and averaging just 5°C (42°F), peaking at a modest 16°C (61°F). The precipitation in January is significantly lower at 78 mm (3.1 in) spread across 9 days, and humidity drops to 70%. For more detailed information on the weather during this month, you can visit Suzhou weather in January.
September and February present stark contrasts in weather. September typically boasts warmer temperatures, with minimums around 17°C (63°F) and maximums peaking at 34°C (93°F), creating a pleasant average of 25°C (78°F). However, it also brings considerable rainfall, with precipitation reaching 143 mm (5.6 in) over 12 days and high humidity levels at 81%. In contrast, February features cooler conditions, with temperatures ranging from a chilly -3°C (27°F) at night to a mild 21°C (71°F) during the day, averaging just 7°C (44°F). The month experiences less rain, totaling 81 mm (3.2 in) over about 10 days, and a lower humidity of 73%. For more detailed information, you can explore Suzhou weather in February.
September and March exhibit quite contrasting weather patterns. In September, temperatures range from a mild minimum of 17°C (63°F) to a warm maximum of 34°C (93°F), with an average of 25°C (78°F). This month also sees considerable rainfall, accumulating to 143 mm (5.6 in) over 12 days, while humidity stays high at 81%. In contrast, March experiences much cooler temperatures, with a minimum of just 1°C (35°F) and a maximum reaching 27°C (80°F), resulting in a much lower average of 12°C (54°F). Precipitation in March totals 101 mm (4.0 in) falling over 13 days, yet maintains the same humidity level of 81%. For more detailed insights, you can reference Suzhou weather in March.
September weather is generally warmer compared to April, with average temperatures rising to around 25°C (78°F) and highs reaching up to 34°C (93°F). In contrast, April sees a much cooler average of 17°C (63°F) and maximum temperatures of 30°C (87°F). Precipitation is higher in September, totaling 143 mm (5.6 in) over 12 days, while April boasts 83 mm (3.3 in) over 10 days. Humidity levels are slightly elevated in April at 87%, compared to September's 81%. For more detailed information, check out Suzhou weather in April.
In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 34°C (93°F), with an average of 25°C (78°F). This month experiences more rainfall, totaling 143 mm (5.6 inches) over about 12 days, and the humidity stands at a relatively high 81%. In contrast, May presents slightly cooler weather, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 35°C (96°F) and an average of 22°C (72°F). Although May has less rainfall at 126 mm (4.9 inches) over 11 days, it boasts a higher humidity level of 87%. For more specific insights, you can check Suzhou weather in May.
In comparing the weather of September and June, we can observe a few notable differences. September tends to have slightly lower minimum temperatures, averaging around 17°C (63°F), while June starts off slightly warmer at a minimum of 18°C (65°F). Both months share an average temperature of approximately 25°C (77°F), with June peaking at a max of 35°C (95°F) compared to September's max of 34°C (93°F).
Rainfall is more prevalent in June, with a total precipitation of 207 mm (8.1 in) over 14 days, compared to September's 143 mm (5.6 in) over 12 days. Additionally, humidity levels are higher in June at 89%, while September records a humidity of 81%. For more detailed weather insights, you can check Suzhou weather in June.
September's weather is typically more moderate than July’s, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 34°C (93°F), as compared to July’s warmer range of 21°C (70°F) to 38°C (101°F). While September experiences slightly less precipitation at 143 mm (5.6 in) over 12 days, July is significantly wetter with 272 mm (10.7 in) and rainfall on 15 days. Additionally, humidity levels are generally higher in July (93%) compared to September (81%), contributing to a more uncomfortable heat during the peak summer month. For more detailed weather information, you can visit Suzhou weather in July.
In comparing the weather between August and September, September features slightly cooler temperatures, with average highs of 34°C (93°F) compared to August's maximum of 36°C (98°F). The minimum temperatures in September are also lower, ranging from 17°C (63°F) to 25°C (78°F), whereas August starts from a higher minimum of 22°C (71°F). Precipitation in September is about 143 mm (5.6 in) over 12 days, while August sees higher rainfall at 171 mm (6.7 in) across 14 days. Humidity levels are also a tad lower in September at 81%, compared to 91% in August, which can make for a more comfortable atmosphere as the month progresses. For a detailed overview, you can check Suzhou weather in August.
September's weather is characterized by warmer temperatures, with daily highs reaching up to 34°C (93°F) and a humid atmosphere at 81%. The month sees significant rainfall, averaging 143 mm (5.6 in) over 12 days, which contributes to the lush surroundings. In contrast, October brings a noticeable drop in temperatures, with average highs of 19°C (67°F) and lows around 11°C (52°F). The month is drier, with only 55 mm (2.2 in) of rain falling over 8 days, maintaining a humidity level of 80%. For more detailed insights on what to expect, check out Suzhou weather in October.
September weather is typically warm and humid, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 34°C (93°F). The month experiences significant rainfall, with 143 mm (5.6 in) spread over 12 days, contributing to a high humidity level of 81%. In contrast, November brings cooler temperatures, where averages range from a minimum of 4°C (40°F) to a maximum of 26°C (80°F). The precipitation decreases considerably to 55 mm (2.2 in) over just 9 days, while humidity remains quite high at 82%. For more information on weather conditions in November, you can check this link: Suzhou weather in November.
In September, the weather is warm and humid, with average temperatures around 25°C (78°F) and a maximum of 34°C (93°F), creating a vibrant atmosphere despite the 143 mm (5.6 in) of rainfall over 12 days. In contrast, December experiences much cooler temperatures, averaging just 7°C (46°F) and peaking at 19°C (66°F), along with significantly lower precipitation of 60 mm (2.4 in) over 8 days. The humidity in December is also slightly lower at 77%, making it feel drier than the sweltering humidity of September. For more detailed information, check out Suzhou weather in December.
As September unfolds in Suzhou, the weather begins to shift, offering a transitional experience from the hot summer months. With average temperatures settling pleasantly around 25°C (78°F), it’s a time when the intense summer heat gradually gives way to milder days and cooler evenings. The increased humidity of 81% keeps the air feeling somewhat heavy, but this is balanced by a significant drop in precipitation, totaling around 143 mm over 12 days, making it less rainy than the peak of summer. This month stands out as a refreshing respite, inviting residents and travelers alike to enjoy the beauty of Suzhou's late summer charm. For more insights, be sure to check the detailed Suzhou Climate.