Last updated: August 21, 2025
In Jiangnan, China, September is characterized by a warm and humid climate, with average temperatures hovering around 28°C (82°F). Daily highs can soar up to a scorching 36°C (97°F), while cooler nights bring temperatures down to a comfortable 20°C (68°F). This month witnesses significant precipitation, accumulating to 170 mm (6.7 in) over approximately 18 days, contributing to the region's lush landscapes. With humidity levels reaching around 72%, September in Jiangnan is a blend of warmth and moisture, perfect for experiencing the vibrant natural beauty and cultural richness of this dynamic locale.
As September unfolds in Jiangnan, China, the region experiences a gentle transition from the sweltering summer months. With minimum temperatures settling around 20°C (68°F) and average highs reaching 28°C (82°F), the weather begins to cool, making it a pleasant time for outdoor activities. The maximum temperature can still peak at 36°C (97°F), reminiscent of August’s heat, but now there's a noticeable drop compared to the peak summer months, hinting at the impending autumn chill. This month serves as a bridge, blending the lingering warmth of summer with the welcome freshness that October promises, creating an ideal climate for both exploration and relaxation.
September marks a notable shift in Jiangnan, China’s precipitation cycle, receiving 170 mm (6.7 in) of rain over approximately 18 days. This marks a decrease from the intense rainfall of August, which averaged 264 mm (10.4 in) across 25 rainy days, signaling the gradual transition from summer saturation. As the region prepares for autumn, the consistently high precipitation in the preceding months underscores the area's reliance on summer rainfall to nourish its lush landscape, while September’s figures illustrate a promising balance between wet and dry days. This month acts as a bridge, allowing for ample moisture while hinting at the drier conditions that lie ahead in October, which typically sees a drop to 117 mm (4.6 in).
In September, humidity levels in Jiangnan, China show a noticeable decline, dropping to 72% after the peaks of summer. This marks a significant decrease from July and August, when humidity soared to 89% and 88%, respectively. As the region transitions into autumn, the air begins to feel less oppressive, reflecting a broader trend of decreasing humidity that starts earlier in the year, peaking in the sweltering months of June and July. Compared to the beginning of the year, when humidity hovered around the mid-50s, September’s levels indicate a shift towards more comfortable conditions, as the region prepares for the cooler and drier months ahead.
In September, Jiangnan, China experiences a UV Index of 11, categorizing exposure as extreme with a burn time of only 10 minutes. This marks a slight decline from the peak summer months of July and August, where the UV Index consistently reached 13. However, the risk remains significant, reflecting a pattern of high UV radiation that persists from late spring through early fall. As autumn approaches, UV levels gradually lower, but caution is still warranted, especially during midday hours. For more detailed information on UV radiation trends throughout the year, visit Jiangnan UV Index.
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As September dawns in Jiangnan, the warmth of summer lingers with 282 hours of glorious sunshine, a testament to the region's vibrant atmosphere as it transitions toward autumn. This month's radiant skies contribute to a remarkable trend where sunshine hours peak during the summer months, with July leading at 295 hours and August closely following with 289 hours. The abundance of sunlight in September signifies a slight decline, yet it still outshines earlier months like January and February, which barely reach 140 and 192 hours respectively. As the days gradually shorten into October, emerging patterns reveal a gradual tapering off of sunshine, inviting cooler days while still allowing plenty of time to bask in the fading warmth of the summer sun.
September in Jiangnan, China, witnesses a refreshing 35% chance of sunny weather, marking a slight improvement from the summer months when the likelihood of sunshine dips to its lowest. As the season transitions, this uptick hints at a more favorable climate compared to the sweltering July and August, which both struggle with only a 29% and 14% probability of clear skies, respectively. While September may not boast the top percentages seen in the winter months, with January and December both enjoying 47% chances of sun, it does signify a gradual shift towards brighter days, making it a pleasantly warm time to experience the region’s stunning landscapes.
As summer gracefully transitions into autumn, September in Jiangnan, China experiences a return to 12 hours of daylight, echoing the balanced brightness of spring months like March and April. This shift marks the end of the longer, sun-drenched days of the late summer months, where daylight peaked at 13 hours in May through July. As the year gently winds down, the diminishing daylight gradually heralds the approach of autumn, with the coming months promising a steady decline to the 11 hours of light seen in October and November. This rhythmic dance of daylight not only highlights the beauty of seasonal change but also invites reflection on the cyclical nature of time in this enchanting region.
As September unfolds in Jiangnan, a noticeable shift occurs in the region's breeze, with average wind speeds dropping to a gentle 1.7 m/s (4 mph). This decline marks the calmest month of the year, following a summer where gusts remained relatively steady around 2.4 to 3.1 m/s. The transition into autumn begins to hint at a more subdued atmosphere, paving the way for the breezier months ahead in October when winds pick up to 3.3 m/s (7 mph). This pattern showcases Jiangnan's rhythm, balancing moments of tranquility with refreshing gusts as the seasons change, inviting both reflection and appreciation of nature's cycle.
Weather in Jiangnan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jiangnan, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is characterized by warm temperatures, with a minimum of 20°C (68°F) and an average high of 28°C (82°F), reaching up to 36°C (97°F) at times. However, this month also experiences significant precipitation, averaging 170 mm (6.7 in) over about 18 days, coupled with high humidity levels of 72%. In stark contrast, January features much cooler temperatures, with a minimum of 4°C (39°F), an average of 14°C (58°F), and a maximum of 27°C (82°F). Precipitation during this month is considerably lower, averaging just 41 mm (1.6 in) over 7 days, and the humidity decreases to 56%. For a detailed look at January's climate specifics, you can explore Jiangnan weather in January.
September and February exhibit stark contrasts in weather conditions. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 36°C (97°F), creating a warm average of 28°C (82°F). This month also experiences significant rainfall, with about 170 mm (6.7 in) of precipitation spread over 18 days, resulting in humidity levels at 72%. In contrast, February brings a much cooler climate, with temperatures ranging from a chilly 4°C (40°F) to a comfortable maximum of 29°C (85°F) and an average of 15°C (60°F). Precipitation during this month is considerably lighter, totaling around 60 mm (2.4 in) over just 8 days, alongside lower humidity at 62%. For more details about February weather, you can visit Jiangnan weather in February.
In September, the weather is significantly warmer, with average temperatures around 28°C (82°F) and highs reaching up to 36°C (97°F). The humidity is notably high at 72%, contributing to a muggy atmosphere. Additionally, September experiences more precipitation, with 170 mm (6.7 in) falling over 18 days. In contrast, March sees much cooler temperatures, with an average of 20°C (68°F) and maximums hitting 31°C (89°F). The precipitation is also lower at 103 mm (4.1 in), while the humidity drops to 62%. For more detailed information, you can check Jiangnan weather in March.
In comparing the weather conditions of September and April, a notable shift in temperature and humidity is evident. September boasts higher temperatures, with an average of 28°C (82°F) and peaks reaching as high as 36°C (97°F), while April's temperatures are milder, averaging 23°C (73°F) and also maxing out at 36°C (97°F). Humidity levels further distinguish the two months, as September experiences a more humid atmosphere at 72%, compared to April's 58%. Additionally, September has significantly more rainfall, accumulating 170 mm (6.7 in) over 18 days, while April sees a more moderate 96 mm (3.8 in) across 15 days. For more detailed insights into weather patterns, visit Jiangnan weather in April.
In comparing the weather in September and May, both months experience warm temperatures, with September having a slightly higher average of 28°C (82°F) compared to May's 26°C (80°F). However, both months share similar maximum temperatures, peaking at 36°C (97°F) in September and 36°C (98°F) in May. Precipitation levels are fairly close, with September receiving 170 mm (6.7 in) over 18 days and May experiencing just a bit more at 175 mm (6.9 in) over 20 days. Humidity is also comparable, measuring 72% in September and 74% in May. For a more detailed look at the climate during this time, check out Jiangnan weather in May.
In comparing the weather of September and June, both months experience similar minimum temperatures, averaging around 20°C (68°F). However, June tends to be slightly warmer overall, with an average temperature of 29°C (84°F) compared to September’s 28°C (82°F). June also sees higher maximum temperatures, reaching up to 37°C (99°F), while September peaks at 36°C (97°F). When it comes to rainfall, June is considerably wetter, receiving 275 mm (10.8 in) of precipitation over 23 days, whereas September has 170 mm (6.7 in) distributed across 18 days. The humidity in June is also higher at 80%, compared to 72% in September, making June feel more oppressive. For more detailed insights, you can check out Jiangnan weather in June.
In comparing the weather of September and July, September tends to be slightly cooler, with average temperatures reaching 28°C (82°F) compared to July's average of 29°C (85°F). However, July experiences higher maximum temperatures, peaking at 38°C (100°F) versus September's 36°C (97°F). Both months are quite humid, but July is notably more humid with a 89% average compared to September's 72%. Additionally, July sees more rainfall, accumulating 213 mm (8.4 in) over 23 days, while September receives 170 mm (6.7 in) over 18 days. For a detailed look at July weather in Jiangnan, you can refer to Jiangnan weather in July.
In comparing the weather of September and August, September typically experiences slightly cooler temperatures, with a minimum of 20°C (68°F) and an average of 28°C (82°F), compared to August's minimum of 24°C (75°F) and average of 29°C (84°F). While both months feature high temperatures, August peaks at 37°C (99°F) versus September’s maximum of 36°C (97°F). Moreover, September sees a decrease in precipitation, recording 170 mm (6.7 in) over 18 days, compared to August's heftier 264 mm (10.4 in) across 25 days. Humidity levels also drop from 88% in August to 72% in September, indicating a more comfortable atmosphere as the month progresses. For a detailed look, check out Jiangnan weather in August.
September and October in the region display distinct differences in weather patterns. In September, temperatures range from a minimum of 20°C (68°F) to a peak of 36°C (97°F), with an average temperature of 28°C (82°F). The month is relatively wet, with 170 mm (6.7 in) of precipitation spread over 18 days and high humidity at 72%. In contrast, October sees cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 34°C (94°F), averaging 23°C (74°F). Precipitation decreases to 117 mm (4.6 in) over just 13 days, and humidity drops to 64%. For more details about October weather in the region, visit Jiangnan weather in October.
September offers a warm climate characterized by high temperatures, with a minimum of 20°C (68°F) and average highs reaching up to 36°C (97°F). The month is also notable for its significant rainfall, accumulating around 170 mm (6.7 inches) over 18 days, and maintaining a humidity level of 72%. In contrast, November brings cooler weather, with temperatures dipping to a minimum of 9°C (49°F) and an average of 20°C (68°F), peaking at 29°C (85°F). Precipitation decreases substantially to just 40 mm (1.6 inches) over 9 days, and humidity levels drop to 61%. This shift in weather creates a more comfortable atmosphere in November compared to the humid and rainy September. For more details on November weather, visit Jiangnan weather in November.
September's weather is characterized by warm temperatures, with a minimum of 20°C (68°F) and a maximum reaching up to 36°C (97°F), making it one of the hotter months of the year. The average temperature stands at 28°C (82°F), accompanied by significant rainfall, totaling 170 mm (6.7 in) over 18 days, and a high humidity level of 72%. In contrast, December experiences much cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 29°C (84°F), leading to a more comfortable average of 15°C (59°F). Precipitation is significantly lower in December, at 48 mm (1.9 in) over just 8 days, along with a decrease in humidity to 63%. For more details, you can check Jiangnan weather in December.
In September, Jiangnan transitions into a more comfortable climate, characterized by a noticeable drop in temperatures and an increase in humidity. Unlike the peak summer months, the average temperature balances at a pleasant 28°C (82°F), making outdoor activities more enjoyable. However, with approximately 18 days of rainfall totaling 170 mm (6.7 in), this month experiences the onset of the autumn rainy season, which differentiates it from the drier summer months. Overall, September offers a refreshing change, perfect for those who appreciate milder weather while still being prepared for occasional showers. For more insights, check out the detailed weather patterns in the region at Jiangnan Climate.