Last updated: August 21, 2025
In September, Nantong, China experiences a delightful blend of late summer warmth and early autumn coolness. With maximum temperatures reaching a balmy 34°C (94°F) and an average of 25°C (77°F), the weather remains inviting for outdoor activities. However, the city also sees a notable minimum temperature of 17°C (62°F), offering a refreshing respite at night. Rainfall is significant, totaling 145 mm (5.7 in) over approximately 11 days, contributing to an overall humidity level of 81%, which can create a muggy atmosphere. This combination of warmth and moisture sets the stage for a vibrant and lush environment, perfect for enjoying Nantong’s rich natural scenery and cultural offerings.
In September, Nantong experiences a subtle transition as summer gives way to autumn, with temperatures ranging from a comfortable 17°C (62°F) at night to a pleasant 34°C (94°F) during the day. The average temperature settles at 25°C (77°F), striking a delightful balance that invites outdoor activities. This month signifies a gradual cooling trend, following the peak summer heat seen in July and August, where temperatures soared to an overwhelming 40°C (104°F). As the month progresses, you'll notice the cooler mornings and evenings becoming more pronounced, setting the stage for the crispness of October ahead. Overall, September in Nantong offers a refreshing reprieve, perfect for enjoying the lingering warmth of summer while embracing the onset of fall.
In September, Nantong experiences a significant transition in weather patterns as it welcomes 145 mm (5.7 in) of precipitation over 11 days. This marks a notable dip from the intense rainfall seen in July and August, which often bring about the peak summer storms. With precipitation levels recalibrating after summer’s deluge, September serves as a bridge into the drier months ahead, yet still maintains a robust presence of rain. The drop in rainfall compared to the summer months, alongside the consistent frequency of rainy days, indicates a gradual shift towards fall, as temperatures begin to cool and the lush greenery slowly starts to retreat. This month encapsulates the dynamic climate of Nantong, balancing the remnants of summer with the onset of autumn.
In Nantong, China, September brings a welcome shift as humidity levels drop to 81%, offering a respite from the sweltering summer months. This transitional period follows the peak of 93% recorded in July, which has been the highest in the year. Notably, the humidity remains relatively high compared to the winter months, where levels dip to around 70% in January. As summer gives way to autumn, Nantong experiences a moderate humidity that paves the way for a more comfortable outdoor environment, transitioning seamlessly into a slight decline towards October's 80%. This pattern underscores the region's characteristic tropical climate, balancing warmth with refreshing breezes.
As the summer heat begins to wane in Nantong, September still showcases a very high UV Index of 10, indicating that sun exposure remains significant. This level of UV radiation necessitates a burn time of just 15 minutes for unprotected skin, reflecting a continuation of the intense sun experienced during the preceding months of June through August, which all reached an extreme UV Index of 11. The transition into autumn brings a slight decrease in UV intensity, yet it serves as a reminder for residents and visitors to remain vigilant about sun protection, reinforcing the importance of keeping an eye on the daily UV forecast. For those looking to understand more about sun safety throughout the year, visit Nantong UV Index.
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As summer gracefully wanes, September in Nantong, China, shines with 259 hours of sunlight, highlighting a delightful transition from the intense brightness of July and August, which boast an impressive 277 and 305 hours, respectively. The month serves as a bridge to the softer light of autumn, where daylight starts to dip yet remains richer than earlier months like January and February. Observing this gradual decline, from May's peak of 287 hours to October's 243 hours, it’s evident that autumn offers a blend of warmth and burgeoning color. This pattern not only enhances the beauty of the season but also invites residents and visitors alike to revel in the lingering sunshine before the colder months ensue.
In Nantong, China, September ushers in a refreshing shift in weather patterns, boasting a 46% chance of sunny days. This marks a notable improvement from the summer months, where sunny probabilities dip as low as 20% in July. As the sweltering heat of summer gives way, September offers a glimmer of sunshine, suggesting a delightful transition towards autumn. Interestingly, the likelihood of sunny weather in September is closely aligned with the more favorable conditions observed in the subsequent months of October and November, making it a promising time for outdoor activities. Overall, as the year progresses, Nantong transitions from a predominantly overcast July and August to a September rich in sunshine, setting the stage for a picturesque fall.
As summer fades into autumn, September in Nantong, China, embraces a gentle decline in daylight duration, offering 12 hours of sunlight—a subtle shift from the 14 hours of vibrant light experienced in June. This month acts as a bridge, gently transitioning from the long, sun-drenched days of summer back to the shorter days ahead. The consistent rhythm of daylight appears pronounced, as it mirrors the gradual shortening observed throughout the year: from the 11 hours in October to the 10 hours that greet winter in November and December. This dynamic variation not only marks the changing seasons but also enriches the landscape, inviting residents to savor the softer light and cooler temperatures that September heralds.
In September, the winds in Nantong, China continue to hold steady with an average speed of 3.4 m/s (8 mph), mirroring the calm breezes of the spring months. This gentle airflow contrasts sharply with the gustier conditions of July, which boasts the highest average speed at 4.3 m/s (10 mph). Interestingly, while late summer sees a decrease, with August recording the lowest wind speed at 2.8 m/s (6 mph), September marks a return to the more consistent breezes typical of earlier months. Overall, the trends reflect a modest yet dependable wind pattern, easing into the cooler autumn days ahead.
Weather in Nantong varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nantong, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, a striking contrast emerges. September enjoys a warm climate, with average temperatures ranging from a pleasant 17°C (62°F) at night to a scorching high of 34°C (94°F) during the day. This month is characterized by considerable humidity at 81% and significant rainfall, with 145 mm (5.7 in) spread over 11 days. In stark contrast, January presents a much colder atmosphere, with temperatures dipping to a minimum of -8°C (17°F) and averaging just 5°C (41°F). The precipitation in January is much lighter, totaling 48 mm (1.9 in) over only 7 days, accompanied by lower humidity levels at 70%. For more detailed information on January weather, you can visit this link: Nantong weather in January.
September and February showcase distinctly contrasting weather patterns. In September, temperatures range from a mild 17°C (62°F) at night to a sizzling average high of 25°C (77°F), reaching up to 34°C (94°F) during the day. This month also sees significant rainfall, with 145 mm (5.7 in) over 11 days and high humidity levels of 81%. Conversely, February experiences much cooler temperatures, with nighttime lows plummeting to -4°C (26°F) and an average max of only 23°C (73°F). Precipitation is lighter, totaling just 52 mm (2.1 in) over 9 days, and humidity is lower at 73%. For more details, check out Nantong weather in February.
September and March present contrasting weather conditions. In September, temperatures range significantly, with a minimum of 17°C (62°F) and a maximum soaring to 34°C (94°F), leading to an average of 25°C (77°F). This month experiences considerable humidity at 81% and substantial rainfall, accumulating 145 mm (5.7 in) over 11 days. Conversely, March is much cooler, featuring a minimum temperature of 1°C (35°F) and an average of 11°C (52°F), while maximum temperatures reach 26°C (79°F). Precipitation in March is notably lower, at 61 mm (2.4 in) over 10 days, and maintains the same humidity level of 81%. For more detailed insights on March weather, check Nantong weather in March.
In comparing the weather of September and April, it's evident that September is significantly warmer, with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), while April's temperatures are cooler, fluctuating between 6°C (42°F) and 30°C (85°F). Additionally, September experiences higher precipitation levels, totaling 145 mm (5.7 in) over 11 days, compared to April's 71 mm (2.8 in) over just 8 days. Both months have high humidity, with April slightly higher at 87%, compared to September’s 81%. For more information on April weather, you can check Nantong weather in April.
September and May exhibit distinct weather patterns, reflecting the transition between seasons. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average of 25°C (77°F). The month is characterized by higher humidity at 81% and significant rainfall, totaling 145 mm (5.7 in) over 11 days. In contrast, May presents cooler temperatures with a minimum of 11°C (53°F) and averaging 21°C (70°F), while reaching a maximum of 35°C (96°F). Although May experiences less rainfall, with 110 mm (4.3 in) over 9 days, the humidity is slightly higher at 87%. Overall, September tends to be hotter and wetter, while May offers milder temperatures and comparatively lower precipitation. For more detailed insights on May weather, check Nantong weather in May.
In both September and June, temperatures exhibit a similar range, with minimums around 17°C (62°F) and average highs of 25°C (77°F). However, June tends to be warmer during peak hours, achieving a maximum of 36°C (98°F) compared to September's high of 34°C (94°F). Despite these similarities, September experiences slightly more rainfall with 145 mm (5.7 in) and 11 wet days, while June has a bit less precipitation at 133 mm (5.2 in) over the same number of days. Additionally, humidity levels are higher in June at 89%, compared to September's 81%. For a detailed look at June's weather, you can visit Nantong weather in June.
In comparing the weather of September and July, we see notable differences in temperature, precipitation, and humidity. September typically experiences a range of temperatures from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average of 25°C (77°F). In contrast, July is generally hotter, with a minimum of 19°C (67°F) and a maximum reaching 40°C (104°F), averaging around 28°C (83°F).
When it comes to precipitation, September sees about 145 mm (5.7 in) over 11 rainy days, while July has higher rainfall at 241 mm (9.5 in) over 17 days. Additionally, July's humidity is slightly higher at 93%, compared to September's 81%. For a closer look at July's weather specifics, you can visit Nantong weather in July.
In comparing the weather of September and August, September presents a cooler profile with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), while August features higher temperatures, averaging between 21°C (71°F) and 38°C (100°F). Precipitation also slightly decreases in September, with 145 mm (5.7 in) recorded over 11 days, contrasting with August's 173 mm (6.8 in) over 15 days. Furthermore, September's humidity level of 81% is a bit lower than August’s 91%. For more detailed information on August weather, you can visit Nantong weather in August.
In September, the weather is notably warmer with average temperatures reaching 25°C (77°F) and maximum highs of 34°C (94°F). The month experiences substantial rainfall, totaling 145 mm (5.7 in) over 11 days, accompanied by high humidity levels at 81%. In contrast, October brings a significant drop in temperature, with averages around 19°C (66°F) and maximums of 32°C (89°F). Precipitation decreases to 51 mm (2.0 in) over just 6 days, and humidity remains slightly lower at 80%. For more details, you can refer to Nantong weather in October.
In September, the weather typically presents warm temperatures with a minimum of 17°C (62°F), averaging around 25°C (77°F), and peaking at a maximum of 34°C (94°F). The month also experiences significant rainfall with around 145 mm (5.7 in) over 11 days, and the humidity remains high at 81%. In contrast, November marks a notable drop in temperatures, with a minimum of 2°C (36°F) and an average of 14°C (57°F), while still reaching up to 27°C (80°F) on warmer days. Rainfall during November decreases to 49 mm (1.9 in) over just 6 days, and humidity slightly rises to 82%. For more details, you can check the Nantong weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 17°C (62°F), an average of 25°C (77°F), and a maximum reaching up to 34°C (94°F). This month also experiences significant precipitation, totaling 145 mm (5.7 in) over about 11 days, combined with high humidity levels at 81%. In stark contrast, December sees a dramatic drop in temperatures, ranging from a frigid minimum of -6°C (21°F) to a mild maximum of 19°C (67°F), with an average temperature of only 7°C (45°F). Precipitation in December is considerably lower at 42 mm (1.6 in) across 7 days, and humidity slightly decreases to 77%. For more detailed information on the December climate, you can check Nantong weather in December.
As summer transitions into autumn, September in Nantong experiences a delightful shift in weather patterns. The temperatures begin to cool, reaching a comfortable average of around 25°C, a welcome change from the sweltering summer heat. With a mix of warm days and cooler nights, the minimum dips to 17°C, providing a pleasant reprieve for locals and visitors alike. While the month sees about 145 mm of rain over approximately 11 days, this precipitation helps maintain the lush greenery that Nantong is known for, contrasting with the drier, hotter months. The humidity remains high at 81%, contributing to the soft, pleasant air that characterizes early autumn. To learn more about Nantong's ever-changing climate, visit Nantong Climate.