Last updated: August 21, 2025
September in Suzhou, China showcases a warm, inviting climate, with maximum temperatures reaching up to 34°C (93°F) and an average of 23°C (75°F). The month exhibits a comfortable minimum temperature of 14°C (57°F), perfect for outdoor activities. While the region enjoys ample sunshine, it also experiences 79 mm (3.1 in) of precipitation over 7 days, contributing to its lush landscapes. With an average humidity of 71%, this period strikes a balance between warmth and refreshing breezes, making it an ideal time to explore the city's charming scenery.
As September unfolds in Suzhou, China, the transition from summer heat to autumn coolness becomes evident. With minimum temperatures around 14°C (57°F) and an average of 23°C (75°F), the weather remains pleasantly warm, making it ideal for outdoor activities and sightseeing. The peak temperature can reach as high as 34°C (93°F), but this is a gentle decline from the sweltering highs of the preceding summer months. This month serves as a bridge, offering a balance of warmth while hinting at the cooler temperatures ahead, as seen in October's minimum of 2°C (37°F). Overall, September's inviting climate captures the essence of early fall in Suzhou, appealing to both locals and visitors alike.
September brings a notable shift in precipitation patterns for Suzhou, China, as the city experiences 79 mm (3.1 in) of rainfall over seven days. Following the intense deluge of July, which saw a staggering 319 mm (12.6 in), and August’s significant 168 mm (6.6 in), September's totals indicate a gradual decline in rainfall. This transitional month, while still experiencing moderate rain, hints at the dry spells ahead, as levels drop sharply in October to 49 mm (1.9 in). The trend illustrates a move from the peak monsoon season towards the more temperate autumn, balancing the lush greenery nurtured by summer rains with the anticipation of cooler, drier weather ahead.
In September, Suzhou experiences a noticeable drop in humidity, dipping to 71%, which marks a welcome relief after the sweltering summer months. This reduction from the peak levels of July and August—where humidity soared to 88% and 84% respectively—signals the onset of autumn. Following a generally upward trend from winter through the humid summer, September offers a brief respite before humidity begins to rise again in the fall months, specifically in November when it spikes to 84%. This shift reflects the city's seasonal transition, providing a more comfortable atmosphere for residents and visitors alike.
As September arrives in Suzhou, China, residents and visitors should be prepared for a significant UV Index of 9, categorized as very high, with a burn time of just 15 minutes. This month continues a trend observed since May, where the UV Index has consistently hovered in the very high range. Notably, the summer months of June through August experienced the peak UV levels, maintaining an index of 10, making sun protection crucial. As we transition into autumn, while the UV Index tapers slightly in October, it's essential to remain vigilant against sun exposure to safeguard your skin. For detailed trends and more information, check out the Suzhou UV Index.
UV Risk Categories
September in Suzhou, China, continues the enchanting trend of a sun-drenched summer, offering 262 hours of sunlight. This month stands as a delightful bridge between the peak brightness of summer and the gentle decline into autumn. Following the vibrant months of July and August, which boast over 300 hours of sunshine each, September's hours represent a slight dip but still promise a warm and inviting atmosphere. As the days shorten, the softening light bathes the city in a golden hue, perfect for evening strolls along its picturesque canals. Overall, Suzhou’s September weather showcases a splendid balance of warmth and tranquility, inviting both locals and visitors to savor the beauty of early fall before the cooler months arrive.
In September, Suzhou experiences a 43% chance of sunny weather, marking a slight uptick from the summer months. As the city transitions from the sweltering heat of July and August, where odds of sunny days dip to 26% and 36%, respectively, September brings a refreshing change. Although not as bright as January's impressive 57%, the weather in September is more favorable than the preceding months, suggesting a delightful time for outdoor activities. Looking ahead, the likelihood of sunny days continues to improve, peaking in the subsequent months of November and December, which boast 64% and 71% chances respectively, thus highlighting a notable seasonal shift toward clearer skies.
In Suzhou, China, the month of September heralds a subtle shift in daylight as it witnesses approximately 12 hours of sunlight. After the peak of 14 hours in the summer months of June and July, days gradually shorten, reflecting the transition into autumn. This rhythmic decline follows a pattern seen throughout the year, beginning with 10 hours in January and February, and peaking at 14 hours in the height of summer. As September wraps up, daylight diminishes further, paving the way for the cooler, shorter days of October. This gradual ebb of light not only marks the changing seasons but also offers a beautiful tapestry of colors that embrace the essence of autumn in Suzhou.
As September arrives in Suzhou, the city's breeze tends to refresh with an average wind speed of 2.8 m/s (6 mph), mirroring the calmer conditions seen in January and June. Following the hustle of summer, where July peaked at 3.6 m/s (8 mph), the winds mellow out, inviting residents and visitors alike to enjoy the pleasant transition into autumn. This moderate breeze continues into October and November, maintaining a steady rhythm as the air cools and the foliage begins to change. Overall, September's winds signal a shift from the sweltering heat of summer, providing a gentle reminder of the crisp, invigorating days that lie ahead.
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 stark contrasts in weather conditions. September enjoys a warmer climate, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 34°C (93°F) and an average of 23°C (75°F). While it experiences some rainfall, with 79 mm (3.1 in) over about 7 days, the humidity remains relatively high at 71%. In contrast, January features significantly colder weather, with temperatures dropping to a minimum of -11°C (12°F) and only reaching a maximum of 17°C (62°F), averaging just 2°C (36°F). Additionally, January sees less precipitation, totaling 32 mm (1.3 in) over approximately 4 days, with humidity slightly lower at 68%. For a deeper look at January's conditions, check out Suzhou weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a mild 14°C (57°F) to a hot 34°C (93°F), with an average of 23°C (75°F). This month experiences a total precipitation of 79 mm (3.1 in) over about 7 days, coupled with a humidity level of 71%. In contrast, February features much colder conditions, with temperatures dipping as low as -7°C (20°F) and peaking at 26°C (78°F), averaging just 5°C (41°F). Precipitation is significantly lower at 25 mm (1.0 in) across 5 days, while humidity remains relatively high at 73%. For more details on February's climate, check out Suzhou weather in February.
September and March present contrasting weather patterns. In September, temperatures are warm, ranging from a minimum of 14°C (57°F) to a maximum of 34°C (93°F), with an average of 23°C (75°F). This month also sees considerable precipitation, totaling 79 mm (3.1 in) over about 7 days, with humidity levels around 71%.
In contrast, March offers a cooler climate, where temperatures range from a minimum of -2°C (29°F) to a maximum of 28°C (83°F), with an average of 11°C (52°F). Precipitation is lighter at 39 mm (1.5 in) over approximately 6 days, and humidity is slightly higher at 81%. For more detailed information, you can visit Suzhou weather in March.
When comparing the weather in September and April, notable differences emerge. September features a higher average temperature of 23°C (75°F), peaking at a warm 34°C (93°F), while April's average is significantly cooler at 16°C (61°F), with a maximum of 32°C (89°F). Humidity levels are relatively high in both months, but April is slightly more humid at 82% compared to September's 71%. Precipitation also varies, with September receiving 79 mm over about 7 days, while April sees less rainfall at 36 mm over just 6 days. For a more detailed look at April's climate, visit Suzhou weather in April.
In September, the weather typically showcases a range of temperatures, with a minimum of 14°C (57°F) and an average of 23°C (75°F), while soaring to a maximum of 34°C (93°F). The month also experiences moderate rainfall, accumulating 79 mm (3.1 in) over approximately 7 days, coupled with a humidity level of 71%. In contrast, May presents slightly cooler conditions with a minimum temperature of 9°C (49°F) and an average of 22°C (72°F), although it can reach highs of up to 37°C (98°F). Precipitation in May is slightly less at 67 mm (2.6 in) over 6 days, but the humidity is marginally higher at 80%. For more detailed insights, you can explore Suzhou weather in May.
September and June exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 14°C (57°F) to a maximum of 34°C (93°F), with an average of 23°C (75°F), while June boasts a broader range, with minimums at 14°C (58°F) and maximums reaching up to 39°C (103°F), averaging 27°C (80°F). Additionally, June experiences significantly higher precipitation, totaling 135 mm (5.3 in) over 7 days, compared to September's 79 mm (3.1 in) over the same number of days. Humidity levels are also higher in June at 79%, contrasting with September's 71%. For more detailed information about June's weather in Suzhou, you can check Suzhou weather in June.
In comparing the weather of September and July, September tends to be milder with a minimum temperature of 14°C (57°F) and an average of 23°C (75°F), while July is notably hotter, featuring a minimum of 20°C (67°F) and an average of 28°C (82°F). July also experiences higher temperatures, peaking at 37°C (99°F) compared to September's maximum of 34°C (93°F). However, July is far wetter, with 319 mm (12.6 in) of precipitation over 14 days, in contrast to September's 79 mm (3.1 in) over just 7 days. Additionally, the humidity in July is significantly higher at 88%, while September's humidity is a more comfortable 71%. For a closer look at July's weather conditions, refer to Suzhou weather in July.
In comparing the weather of September and August, September tends to be cooler and less humid. With a minimum temperature of 14°C (57°F), an average of 23°C (75°F), and a maximum of 34°C (93°F), September offers a respite from the hotter August days, which see a minimum of 17°C (63°F) and an average temperature of 28°C (82°F), peaking at 36°C (97°F). Moreover, September experiences significantly less precipitation, totaling 79 mm (3.1 in) over 7 days, compared to August's 168 mm (6.6 in) spread across 13 days. The humidity in September averages 71%, noticeably lower than August's 84%. For a detailed look at August's weather, visit Suzhou weather in August.
September and October present a notable contrast in weather patterns. In September, temperatures range from a minimum of 14°C (57°F) to a maximum of 34°C (93°F), with an average of 23°C (75°F). The month is characterized by higher humidity at 71% and more precipitation, totaling 79 mm (3.1 in) over 7 days. In comparison, October sees a significant drop in minimum temperatures, falling to 2°C (37°F) while maintaining a similar maximum of 34°C (94°F), with an average temperature of 17°C (62°F). Precipitation decreases to 49 mm (1.9 in) over just 5 days, and humidity slightly increases to 75%. For more details on October weather, you can check Suzhou weather in October.
September and November present quite contrasting weather patterns. In September, temperatures are generally warmer, with minimums around 14°C (57°F), average highs nearing 34°C (93°F), and higher humidity levels at 71%. This month also sees significant rainfall, with 79 mm (3.1 in) over approximately 7 days. In contrast, November experiences a considerable drop in temperature, featuring a minimum of -3°C (27°F) and a cooler average of 11°C (52°F). While the maximum temperature in November can reach 26°C (79°F), the overall environment is less humid at 84%, and precipitation decreases to 29 mm (1.1 in) over just 4 days. For more detailed insights into November's weather in Suzhou, visit Suzhou weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of 14°C (57°F) to a maximum of 34°C (93°F), with an average of 23°C (75°F), while the month experiences significant rainfall of 79 mm (3.1 in) over about 7 days, accompanied by a humidity level of 71%. Conversely, December brings much colder temperatures, with a minimum of -13°C (9°F) and a maximum of 18°C (64°F), averaging just 4°C (39°F). Precipitation drops significantly to 20 mm (0.8 in) over approximately 3 days, and humidity rises slightly to 77%. For a more detailed look at December weather, you can visit Suzhou weather in December.
As September unfolds in Suzhou, the weather begins to transition, offering a delightful mix that sets it apart from the sweltering summer months. With pleasant average temperatures around 23°C (75°F), the heat starts to wane, yet the maximum can still reach 34°C (93°F) on warmer days. While you may experience some rainfall—about 79 mm (3.1 in) over the course of the month—the number of rainy days is limited, allowing for ample sunshine amidst a 71% humidity level. This balance of warmth and moisture makes September an ideal time to explore the beauty of Suzhou. For a deeper dive into the nuances of this enchanting city’s weather, visit Suzhou Climate.