Last updated: August 21, 2025
September in Nantong, China is characterized by a warm climate, where temperatures can peak at a sizzling 36°C (96°F), while averaging around a comfortable 23°C (74°F). The month experiences a notable minimum temperature of 15°C (59°F), providing a pleasant contrast during cooler nights. However, it’s also a time of considerable precipitation, with 174 mm (6.9 in) of rain spread over 18 days, leading to an increased humidity level of 84%. This combination of warmth and moisture creates a vibrant, lush atmosphere, typical of the transitioning season.
In September, Nantong, China, experiences a transition as the sweltering summer heat begins to wane. With temperatures ranging from a minimum of 15°C (59°F) to a peak of 36°C (96°F), the month delivers an average warmth of 23°C (74°F), making it a pleasantly warm time for outdoor activities. This slight dip from the oppressive summer months highlights a shift toward cooler weather, as the city prepares for the crispness of autumn. As September unfolds, the lingering warmth encourages vibrant local festivals and harvest celebrations, allowing residents and visitors alike to enjoy the beautiful, balmy days before the chill of October sets in.
In September, Nantong experiences a notable precipitation spike, receiving 174 mm (6.9 in) of rain over 18 days. This pattern marks a peak in the monsoon season, mirroring the heavy rainfall seen in May and June, while remaining consistent with the wetter months of earlier summer. As the transition to autumn begins, the precipitation levels show a slight decrease compared to the preceding months, yet they remain significantly higher than those recorded in the later months of the year, such as October and November. This trend underscores Nantong's characteristic climate, where the waning summer heat still fuels significant rainfall before the dry season sets in.
In Nantong, China, September marks a notable shift in humidity as it begins to taper off from the peak summer levels. With an average humidity of 84%, September retains considerable moisture in the air, though it is slightly lower than the sweltering 87% experienced in August. This gradual decline signifies the transition into autumn, where humidity levels start to stabilize before dipping further in October. Throughout the year, Nantong's humidity peaks in the summer months, reaching its highest during July and August, while the winter months average closer to 72%-76%. This cyclical pattern highlights the region's characteristic seasonal shifts, with early autumn still offering a warm, humid embrace before ushering in the cooler, drier days ahead.
As September rolls into Nantong, China, the UV Index maintains a very high level of 9, indicating a significant potential for skin damage with just 15 minutes of unprotected sun exposure. This trend reflects a slight decrease from the peak of 12 experienced during the summer months, yet precautions remain essential during this transitional period. The month signals a gradual shift toward lower indices, preparing residents for the cooler months ahead. Those enjoying the outdoors are urged to stay vigilant and protect their skin as the UV levels, although reduced, are still formidable. For more information on Nantong's UV Index, you can visit Nantong UV Index.
UV Risk Categories
September in Nantong, China, embraces a delightful transition as summer wanes, gifting residents with 219 hours of sunshine. This notable drop from August's peak of 312 hours signifies the changing seasons, marking a comforting warmth that lingers. Following months of abundant sunlight, September shines with a balance of radiant days and refreshing breezes, enchanting locals and visitors alike. As the year progresses, the sun gradually retreats, with daylight hours dwindling to 138 in October, painting a picture of the natural ebb and flow of light in this vibrant city. The delightful September sun invites outdoor activities, a perfect time to savor the last whispers of summer before the cooler months set in.
As September rolls into Nantong, China, the likelihood of experiencing sunny weather significantly brightens, with a notable 38% chance of sunshine. This represents a peak in the annual trend, where the chances of clear skies soar above the averages of the preceding months, which typically hover around the mid-20% range. Particularly striking is the contrast to April and June, where gloomy forecasts are more common, dipping to as low as 12%. With summer lingering just a bit longer, September offers a sweet spot for outdoor activities as the chances of sunshine outstrip those of both October and November, which drop to 20% and 23%, respectively. As the season transitions, this month becomes an inviting window for those seeking sun-drenched days in Nantong.
As September rolls into Nantong, China, the days begin to shorten, offering around 12 hours of daylight. This month marks a gentle transition from the long, sun-kissed days of summer, where daylight peaked at 13 hours from May to August. The gradual decrease in sunlight serves as a reminder of the impending autumn, with daylight hours cleverly unwinding as the year approaches its end. Following September, October witnesses a further dip to just 11 hours of daylight, echoing the natural rhythm of the changing seasons and the cyclical return to shorter, crisper days. This ebb and flow of sunlight not only shapes the landscape but also influences the spirit of those who savor each golden hour.
As September arrives in Nantong, the winds begin to pick up, with an average speed of 1.9 m/s (4 mph), subtly marking a shift from the summer's gentle breezes. This increase in wind speed not only sets the tone for the transition into autumn but also stands out as the month with the highest winds of the year. Prior months, particularly from May to August, maintained a consistent calm at around 1.5 m/s, emphasizing a lingering summer warmth. However, as the days grow shorter and temperatures begin to cool, September breathes new life into the coastal city, hinting at the change of seasons and inviting residents and visitors alike to embrace the refreshing gusts that herald the arrival of fall.
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 September, the weather is generally warm, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), averaging around 23°C (74°F). This month also experiences significant rainfall, with a total precipitation of 174 mm (6.9 in) spread over 18 days, resulting in high humidity levels of 84%. In contrast, January brings much colder temperatures, with a minimum of -4°C (26°F), an average of 7°C (45°F), and a maximum of 17°C (62°F). Precipitation is considerably lower at 46 mm (1.8 in) over 12 days, and humidity decreases to 72%. For more detailed insights about January weather, you can check out Nantong weather in January.
September and February present stark contrasts in weather conditions. September boasts significantly warmer temperatures, with a range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F) and an average of 23°C (74°F). This month also experiences higher precipitation, totaling 174 mm (6.9 in) spread over 18 days, coupled with high humidity levels at 84%. In contrast, February offers a much cooler climate, where temperatures dip to a minimum of -1°C (31°F) and rise to a maximum of 25°C (77°F), averaging just 9°C (48°F). Precipitation is considerably lower in February at 47 mm (1.8 in) over 13 days, with humidity slightly lower at 76%. For more detailed information, you can check Nantong weather in February.
September and March present contrasting weather patterns, showcasing the transition from summer to autumn. In September, temperatures range from a cooler 15°C (59°F) at night to a sizzling 36°C (96°F) during the day, with an average of 23°C (74°F). This month is also quite humid, with 84% humidity and significant rainfall totaling 174 mm (6.9 in) over 18 days. In contrast, March features cooler conditions, with temperatures dipping as low as 5°C (41°F) at night and reaching a maximum of 30°C (87°F), averaging only 14°C (58°F). Rainfall is less intense, with 97 mm (3.8 in) over 17 days and slightly lower humidity at 80%. For more detailed information on March weather, you can check out Nantong weather in March.
In September, the weather tends to be significantly warmer compared to April, with minimum temperatures around 15°C (59°F) and an average high of 36°C (96°F). In contrast, April sees cooler temperatures, starting at a minimum of 6°C (44°F) and peaking at a maximum of 33°C (92°F). Precipitation in September is also higher, totaling 174 mm (6.9 in) over 18 days, while April experiences 112 mm (4.4 in) over 16 days, leading to slightly drier conditions. Additionally, humidity is higher in September at 84%, compared to 77% in April. For a more detailed look at April's climate, you can visit Nantong weather in April.
In comparing the weather between September and May, we can observe notable differences in temperature and humidity levels. September typically enjoys warmer temperatures, with a minimum of 15°C (59°F) and an average high of 36°C (96°F), while May sees slightly cooler temperatures, with a minimum of 11°C (52°F) and a maximum of 35°C (96°F). Interestingly, both months receive similar amounts of precipitation, around 174 mm (6.8-6.9 inches), and experience significant rainfall days—18 in September and 19 in May. Humidity levels are relatively high in both months, with September at 84% and May slightly lower at 82%. For more detailed insights on May weather, you can check Nantong weather in May.
In September, the weather remains warm with average temperatures around 23°C (74°F) and can peak at 36°C (96°F), similar to June. However, June has a slightly higher average temperature of 24°C (75°F) with maximums reaching 35°C (95°F). Both months experience significant rainfall, with September receiving 174 mm (6.9 in) and June slightly more at 181 mm (7.1 in), occurring over the same number of days—18. Humidity levels are comparable, with September at 84% and June at 85%. For more details on June weather, you can visit Nantong weather in June.
When comparing the weather in September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), while July typically experiences higher temperatures with a minimum of 19°C (67°F) and a maximum of 40°C (105°F). Both months see significant rainfall, with September receiving 174 mm (6.9 in) over 18 days, slightly more than July's 149 mm (5.9 in) across 17 days. In terms of humidity, both months are quite similar, with July at 85% and September slightly lower at 84%. For a closer look at July weather specifics, you can check Nantong weather in July.
In comparing the weather of September and August, it is evident that September experiences slightly cooler temperatures, with an average of 23°C (74°F) compared to August's warmer average of 28°C (83°F). While September has a maximum temperature that can reach up to 36°C (96°F), August can peak at a scorching 40°C (103°F). August also tends to be drier, with 146 mm (5.7 in) of precipitation over 14 days, whereas September sees an increase in rainfall, totaling 174 mm (6.9 in) across 18 days. Humidity levels are relatively high in both months, with September at 84% and August slightly higher at 87%. For more detailed weather information, check out Nantong weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures remain warm, with average highs reaching 36°C (96°F) and lows around 15°C (59°F), combined with significant humidity at 84%. Conversely, October sees a drop in temperatures, with an average high of 35°C (94°F) and a low of 8°C (46°F). While both months experience substantial precipitation, September has a higher total of 174 mm (6.9 in) over 18 days, compared to October's 130 mm (5.1 in) over 19 days. Although humidity slightly decreases to 81% in October, the transition marks a shift towards cooler and more manageable weather. For a closer look at what to expect, check out Nantong weather in October.
September and November present markedly different weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average of 23°C (74°F). The month is characterized by high humidity at 84% and significant rainfall, totaling 174 mm (6.9 in) over 18 days. In contrast, November brings cooler conditions with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 27°C (81°F), averaging 13°C (55°F). This month sees much less precipitation, totaling 68 mm (2.7 in) over 12 days, with humidity slightly higher at 86%. For more detailed information, you can check Nantong weather in November.
September weather in Nantong is characterized by warm temperatures, with a minimum of 15°C (59°F) and an average of 23°C (74°F), peaking at a hot 36°C (96°F). This month also experiences significant rainfall, totaling 174 mm (6.9 in) over about 18 days, combined with high humidity levels reaching 84%. In contrast, December brings a much cooler climate, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 18°C (64°F) and an average of 8°C (47°F). Rainfall is considerably lower, totaling only 47 mm (1.8 in) across 13 days, and the humidity drops slightly to 81%. For more detailed information about December weather in Nantong, visit Nantong weather in December.
As summer transitions into autumn, September in Nantong witnesses a notable shift in weather patterns. The air carries a refreshing warmth, with average temperatures balancing between the heat of the day and cooler evenings. This month stands out with increased humidity, creating a slightly muggy feel, while precipitation becomes more frequent, resulting in about half the days experiencing rain. Compared to the hotter, drier summer months, September offers a unique blend of warmth and moisture, making it a time of vibrant changes in the local climate. For a more detailed look at how Nantong's seasons compare, explore Nantong Climate.