Last updated: August 21, 2025
In Kunshan, China, September brings a blend of warmth and humidity, with maximum temperatures reaching up to 35°C (95°F) and an average of 25°C (77°F). As summer transitions into fall, temperatures can dip to a minimum of 15°C (60°F), offering a delightful range for outdoor activities. However, expect about 158 mm (6.2 in) of rain over approximately 12 days, contributing to the region's 81% humidity. This mix of heat and moisture creates a vibrant atmosphere, perfect for experiencing the lush landscapes and cultural richness of Kunshan.
In September, Kunshan, China, experiences a delightful transition as summer's heat begins to wane. With minimum temperatures around 15°C (60°F) and an average of 25°C (77°F), the month provides a comfortable climate for both locals and visitors. The maximum temperatures can still reach a warm 35°C (95°F), though they tend to be milder compared to the sweltering highs of July and August. This shift hints at the upcoming autumn, making September an ideal time for outdoor activities and festivals as the weather remains pleasant and vibrant. As days gradually shorten, the lingering warmth coupled with cool evenings creates a perfect atmosphere for exploration and enjoyment of Kunshan’s rich cultural offerings.
In September, Kunshan experiences a significant amount of rainfall, tallying 158 mm (6.2 in) over 12 days, marking a slight decrease from August's deluge of 165 mm. This month typically transitions the region from the height of summer's heavy showers into the milder autumn season. Despite the drop, September remains one of the wetter months, contributing to a cumulative total that gradually tapers off as temperatures cool. The shift from July's peak of 247 mm underscores a trend of diminishing precipitation as the year progresses, with October's average expected to decrease further to just 48 mm (1.9 in) over 6 days. This pattern highlights Kunshan's dynamic climate, balancing rainy periods with drier spells as autumn sets in.
In September, Kunshan, China experiences a notable decline in humidity, averaging 81%. This marks a gentle retreat from the peak of summer, where July and August bask in an almost sultry embrace with humidity levels reaching 93% and 91%, respectively. As the sweltering summer gives way to the mildness of fall, September's humidity reflects a shifting pattern, transitioning from the oppressive moisture of the previous months towards a more comfortable atmosphere. While humidity remains relatively high compared to the earlier months of the year, such as January at 70%, it heralds a welcome freshness that precedes October's cooler 80% levels, inviting residents to enjoy the subtle nuances of the changing season.
In September, Kunshan experiences a UV Index of 10, which falls into the very high exposure category, requiring just 15 minutes of sun exposure before skin damage can occur. This slight decrease from the extreme levels seen in the summer months reflects a seasonal shift in UV radiation, although caution is still warranted. As the summer sun gradually wanes, September maintains a strong potential for high UV exposure, making it essential for outdoor enthusiasts to continue practicing sun safety. For comprehensive insights into UV levels throughout the year, visit Kunshan UV Index.
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September in Kunshan, China, is marked by a warm embrace of sunshine, boasting 258 hours of sunlight that beautifully bridges the vibrant summer months and the transitioning fall. Following the peak of 307 hours in August, September experiences a gentle decline, yet still offers ample brightness for outdoor activities and exploration. This pattern highlights a trend of increasing sunlight from the earlier winter months, peaking in summer before tapering off as autumn approaches. The balance of warmth and daylight makes September an inviting time in Kunshan, where the approach of cooler weather contrasts with the lingering summer glow.
As September rolls in, Kunshan, China sees a notable uptick in sunny days, with a 47% chance of sunshine illuminating the landscape. This month stands out amidst a generally scattered pattern of sun exposure throughout the year. Following the peak summer months, which bear a relatively low 18% to 34% sunshine probability, September's percentage signals a welcome shift towards clearer skies. While the likelihood of sunny weather tapers again into the autumn months of October and November, where chances fluctuate between 43% and 58%, the return of brighter days in September offers a refreshing contrast just before the season transitions.
As the days begin to shorten in September, Kunshan, China experiences a moderate 12 hours of daylight that marks the transition toward autumn. This month showcases a slight decrease from the peak of 14 hours in June, reflecting the gradual shift in seasons. Following the vibrant summer months of July and August, which maintained 13 hours of sunlight, September serves as a gentle reminder that shorter days are on the horizon. The trend of increasing daylight from January through June, peaking at 14 hours, and the subsequent decline through autumn into winter suggests a rhythmic ebb and flow of light that residents can anticipate year after year.
As September rolls in, Kunshan, China, experiences a gentle sigh of wind with an average speed of 3.2 m/s (7 mph), slightly up from the summer's lull in August. This transition marks a shift from the more turbulent gusts seen in July, where winds peaked at 4.2 m/s (9 mph). While September's breezes are less robust than the peak summer, they maintain a refreshing consistency reminiscent of early spring months. Overall, the trend showcases a gradual cooling, where the winds soften ahead of autumn, creating a perfect backdrop for enjoying the last golden days of summer while hinting at the crispness to come in October.
Weather in Kunshan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kunshan, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a mild 15°C (60°F) at night to a sizzling 35°C (95°F) during the day, with an average of 25°C (77°F). The month is characterized by high humidity at 81% and considerable rainfall of 158 mm (6.2 in) over about 12 days. In contrast, January brings much cooler temperatures, with nighttime lows dipping to -8°C (18°F) and daytime highs reaching a pleasant 21°C (69°F), averaging around 6°C (42°F). This winter month experiences significantly less precipitation—57 mm (2.3 in) over just 7 days—and lower humidity at 70%. For more details on January weather, you can visit Kunshan weather in January.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 35°C (95°F) and an average of 25°C (77°F). The month experiences considerable precipitation, with 158 mm (6.2 in) spread over 12 days, contributing to the high humidity of 81%. In contrast, February presents a much cooler climate, with temperatures dropping to a minimum of -5°C (23°F) and peaking at 26°C (78°F), averaging around 7°C (44°F). Precipitation is significantly lower at 58 mm (2.3 in), over just 8 days, and humidity is also reduced to 73%. For more details, check out Kunshan weather in February.
September and March display markedly different weather patterns. In September, temperatures range from a mild 15°C (60°F) to a warm 35°C (95°F), with an average of 25°C (77°F). In contrast, March experiences much cooler conditions, with temperatures varying from a minimum of 1°C (33°F) to a maximum of 28°C (83°F), and an average of just 12°C (53°F). Additionally, September sees higher precipitation levels at 158 mm (6.2 in) over about 12 days, whereas March has significantly less rain at 76 mm (3.0 in) across 11 days. Both months share the same humidity level of 81%, but the overall feel of the weather is quite different. For more detailed information on March weather, check out Kunshan weather in March.
September and April showcase strikingly different weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a scorching maximum of 35°C (95°F), with an average of 25°C (77°F), making it notably warmer than April. In contrast, April sees milder temperatures, with a minimum of 4°C (40°F), an average of 16°C (62°F), and a maximum of 32°C (90°F). While September experiences higher precipitation at 158 mm (6.2 in) over 12 days, April's rainfall is lower at 72 mm (2.8 in) across 9 days. Humidity levels are also somewhat higher in April at 87%, compared to September’s 81%. For a detailed look at April's weather, you can visit Kunshan weather in April.
September and May differ significantly in weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a comfortable average of 25°C (77°F), peaking at 35°C (95°F). The month typically experiences about 158 mm (6.2 in) of precipitation over 12 days, accompanied by a humidity level of 81%. In contrast, May presents cooler conditions with temperatures starting at a low of 9°C (49°F), averaging 22°C (71°F), and reaching a maximum of 38°C (100°F). The precipitation in May is lighter at 119 mm (4.7 in) over 10 days, but the humidity is slightly higher at 87%. For a more detailed outlook, you can check Kunshan weather in May.
September weather is characterized by slightly cooler temperatures, with a minimum of 15°C (60°F) compared to June's minimum of 17°C (62°F). Both months share an average temperature of 25°C (77°F), but June can reach a higher maximum of 37°C (99°F), whereas September peaks at 35°C (95°F). In terms of precipitation, September sees 158 mm (6.2 in) over 12 days, while June has a bit more rainfall at 176 mm (6.9 in) across 13 days. Humidity levels are also higher in June at 89%, compared to September's 81%. For a detailed look at June's weather, you can check Kunshan weather in June.
In comparing the weather of September and July, it's evident that July is generally warmer and more humid. July's minimum temperature starts at 19°C (66°F) and peaks at a scorching 43°C (109°F), with an average of 29°C (84°F), while September offers a more moderate range with a minimum of 15°C (60°F) and a maximum of 35°C (95°F), averaging 25°C (77°F). Additionally, July experiences higher humidity at 93% compared to September's 81%, making it feel even hotter. Precipitation is also more pronounced in July, with 247 mm (9.7 in) over 16 days, compared to September's 158 mm (6.2 in) falling over 12 days. For more detailed insights, you can check out Kunshan weather in July.
In comparing the weather between August and September, September tends to be slightly cooler, with average temperatures ranging from a minimum of 15°C (60°F) to a maximum of 35°C (95°F), compared to August's higher range of 20°C (69°F) to 40°C (104°F). Precipitation levels are somewhat similar, with September experiencing 158 mm (6.2 in) over 12 days, while August sees slightly more at 165 mm (6.5 in) over 16 days. Additionally, humidity remains high in both months, though it is marginally lower in September at 81% compared to August's 91%. For a closer look at August's climate specifics, you can check Kunshan weather in August.
In comparing the weather of September and October, September features warmer temperatures, with a minimum of 15°C (60°F) and an average of 25°C (77°F). The month also experiences higher maximum temperatures, reaching up to 35°C (95°F), along with substantially more rainfall, totaling 158 mm (6.2 in) over 12 days. In contrast, October sees a noticeable drop in temperatures, with a minimum of 8°C (48°F) and an average of 19°C (67°F), peaking at 33°C (91°F). Rainfall diminishes significantly to just 48 mm (1.9 in) over 6 days, and humidity remains relatively stable at 80%. For a detailed overview, you can check Kunshan weather in October.
In September, the weather is characterized by warm temperatures, with a minimum of 15°C (60°F), an average of 25°C (77°F), and a maximum reaching up to 35°C (95°F). The month also experiences considerable rainfall, with 158 mm (6.2 in) spread over 12 days, and humidity levels averaging 81%. In contrast, November brings cooler temperatures, with a minimum of 1°C (34°F), an average of 14°C (58°F), and a maximum of 29°C (84°F). Precipitation decreases significantly to 45 mm (1.8 in), occurring over just 7 days, and the humidity remains similarly high at 82%. This notable shift in weather patterns marks the transition from the warm summer months of September to the cooler, more subdued autumn of November. For more detailed information, you can check Kunshan weather in November.
September and December showcase stark contrasts in weather. September's temperatures range significantly, with a minimum of 15°C (60°F) and a max of 35°C (95°F), allowing for a warm average of 25°C (77°F). However, it also experiences considerable rainfall, with 158 mm (6.2 in) over roughly 12 days and high humidity at 81%. In contrast, December brings a cooler climate, with temperatures dipping to a minimum of -6°C (21°F) and averaging around 8°C (46°F). The maximum temperature is more moderate at 22°C (71°F). Additionally, precipitation is much less in December, totaling 46 mm (1.8 in) over 8 days, and humidity remains slightly lower at 77%. For more detailed information about December weather, you can check Kunshan weather in December.
As September unfolds in Kunshan, the weather begins to transition from the sweltering heat of summer to milder conditions. This month is characterized by a significant drop in temperatures, with the warmth still lingering but giving way to more comfortable averages. Compared to the extremes of July and August, September experiences a blend of warm days and cooler evenings, creating an inviting atmosphere for outdoor activities. However, it also brings a fair share of moisture, with regular rainfall and humidity levels lingering around 81%. This combination means that while you can enjoy sunny days, it's wise to carry an umbrella for those frequent showers. Discover more about what to expect in this dynamic month by visiting Kunshan Climate.