Last updated: August 21, 2025
In September, Dandong, China, experiences a delightful blend of late summer warmth and early autumn coolness. With maximum temperatures soaring to 31°C (88°F) and an average of 19°C (67°F), the month offers a comfortable climate for outdoor activities. However, evenings can feel brisk as lows dip to 3°C (38°F). Visitors should be prepared for some rainfall, as 87 mm (3.4 in) of precipitation falls over an average of 7 days, contributing to a humidity level of 75% that creates a rich, vibrant atmosphere. Overall, September in Dandong is marked by fluctuating temperatures, making it an ideal time to enjoy the region's natural beauty.
In September, Dandong, China, experiences a pleasing transition as summer wanes and autumn approaches. The temperatures range from a comfortable 3°C (38°F) at night to a warm 31°C (88°F) during the day, with an inviting average of 19°C (67°F). This pleasant climate marks a noticeable shift from the sweltering summer months, creating a refreshing backdrop for outdoor activities and scenic explorations. As the city bids farewell to the heat, it invites visitors to enjoy mild afternoons that are perfect for sightseeing, while cool evenings signal the arrival of fall. This blend of warmth and coolness makes September an ideal time to experience Dandong’s natural beauty and vibrant culture.
September in Dandong, China, sees a notable dip in precipitation compared to the previous month, with 87 mm (3.4 in) of rainfall spread over just 7 days. This decrease follows August's torrential downpour, which delivered a staggering 272 mm (10.7 in) across 17 days. The shift from the height of summer rains to early autumn marks a significant transition in Dandong's climate, as the region begins to prepare for cooler temperatures and reduced moisture. Despite the lower volume of rainfall in September, it remains an important month, with moisture levels contributing to the overall seasonal balance before the drier months of October and November set in.
As summer transitions to autumn in Dandong, China, September brings a notable change in humidity, settling at 75%. This marks a significant drop from the peak levels of 86% experienced in August, yet it remains higher than the earlier months of the year. The trend showcases a gradual increase in humidity from 58% in January, peaking during the hot summer months, and then tapering off as the year progresses. September’s humidity reflects the lingering warmth of summer while hinting at the cooler, crisper days of October ahead. Overall, the balance between the summer's humidity and the upcoming seasonal shift creates a unique and comfortable climate for Dandong this time of year.
In September, Dandong, China, experiences a UV Index of 8, signaling a very high level of sun exposure that requires caution. As summer transitions to autumn, residents and visitors alike should be aware that the burn time drops to just 15 minutes, mirroring the intense UV levels seen in the preceding months. This trend of heightened UV exposure peaks during the summer months, with July and August also recording a maximum index of 10. Despite this slight decrease in September, the risk remains significant, underscoring the importance of sun protection. For more detailed information, visit Dandong UV Index.
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September in Dandong, China, glimmers with 278 hours of sunshine, marking a delightful transition from the vibrant summer months. As the sun begins to set earlier, the hours of sunshine gradually decrease from the summer peak of 307 hours in July. However, September still boasts a wealth of bright days, slightly cooler temperatures, and an inviting atmosphere. This month serves as a lovely farewell to summer’s warmth, gracefully blending into the crispness of autumn while offering more sunlight than the months ahead, such as October, which sees a decline to 265 hours. The evolving pattern of daylight not only accentuates the beauty of Dandong’s landscape but also ushers in the chapter of seasonal change.
In Dandong, China, the likelihood of sunny weather in September stands at 40%, a modest chance compared to the peak months of winter. As the year progresses, the chances of sunshine show a notable decline from the vibrant days of early spring, where March boasts a 52% chance, to the summer months, when the sun becomes more elusive. This trend continues through August, dropping to 38%, before slightly improving as autumn approaches. While September offers a decent opportunity for sunlight, it still reflects a stronger affinity for sunnier skies found earlier in the year, particularly in January and February, where chances soar to 63% and 69%, respectively. Thus, for those seeking sunny days, September must be approached with tempered expectations, hinting at the seasonal transition ahead.
As summer wanes, September in Dandong, China brings a gentle transition with 12 hours of daylight, a subtle decline from the vibrant 13 hours seen in August. This shift signals the onset of autumn, where daylight gradually diminishes, echoing the rhythm of nature's cycle. With the longest days peaking in the early summer months of June and July at 14 hours, September's shorter days remind us of the approaching cooler months. The gradual decrease continues into October, which offers 11 hours of daylight. Overall, the trend in Dandong shows a gradual ebb of sunlight, welcoming the rich colors and brisk air of fall.
In Dandong, China, September marks a subtle transition in wind patterns as the summer's warmth begins to wane. With an average wind speed of 2.2 m/s (5 mph), September continues the trend of gentle breezes established in the summer months, where July and August had similar low speeds. This modest wind flow creates a tranquil atmosphere, fostering a sense of calm while hinting at the approaching autumn. As the year progresses into October, a slight uptick to 3.0 m/s (7 mph) signals the arrival of cooler air and prepares the region for the breezier months ahead, demonstrating the rhythmic ebb and flow of Dandong’s seasonal winds.
Weather in Dandong varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dandong, focusing on differences in temperature, rainfall, humidity, and UV levels.
September offers a much warmer climate compared to January, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 31°C (88°F) and an average of 19°C (67°F). The month also sees relatively high humidity at 75% and experiences approximately 87 mm (3.4 in) of precipitation over about 7 days. In stark contrast, January brings frigid temperatures, fluctuating between a chilling minimum of -23°C (-9°F) and a maximum of 8°C (46°F), with an average of -7°C (19°F). Precipitation is significantly lower at only 7 mm (0.3 in) across just 1 day, while humidity drops to 58%. For a detailed look at January weather patterns, you can visit Dandong weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a mild 3°C (38°F) at night to a warm 31°C (88°F) during the day, with an average of 19°C (67°F). The month sees 87 mm (3.4 in) of precipitation over about 7 days, contributing to a humidity level of 75%. In contrast, February brings much colder conditions, with temperatures plunging to a minimum of -20°C (-3°F) and averaging -4°C (25°F), peaking at just 13°C (55°F). Precipitation is significantly lower at 19 mm (0.8 in), occurring over only 3 days, and the humidity drops to 52%. For more detailed insights, you can explore Dandong weather in February.
In comparing the weather of September and March, a stark contrast emerges. September boasts a warmer climate with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 31°C (88°F) and an average of 19°C (67°F), alongside a higher humidity level of 75% and 87 mm (3.4 in) of precipitation over approximately 7 days. In comparison, March presents a cooler atmosphere, characterized by temperatures ranging from a chilling minimum of -10°C (14°F) to a maximum of 20°C (68°F), with an average temperature of only 4°C (39°F). March also experiences significantly less precipitation, totaling 19 mm (0.7 in) over just 4 days, and lower humidity at 53%. For more detailed insights on the weather during this month, visit Dandong weather in March.
When comparing the weather in September and April, notable differences emerge. September enjoys a wider temperature range with a minimum of 3°C and an average high of 31°C, while April starts cooler with a minimum of -3°C and an average high of 24°C. Precipitation tends to be heavier in September, accumulating 87 mm over 7 days compared to April's 47 mm over just 5 days. Additionally, September experiences higher humidity at 75%, contrasting with April's more moderate 59%. For more detailed information on conditions in April, you can explore Dandong weather in April.
In September, the weather can be quite warm, with average temperatures reaching 19°C (67°F) and highs soaring up to 31°C (88°F). The humidity is relatively high at 75%, and there are around 7 days of precipitation, totaling 87 mm (3.4 in). In contrast, May tends to be cooler, featuring an average temperature of 16°C (61°F) and maximums of 28°C (83°F). The month sees slightly more rain, with 91 mm (3.6 in) falling over approximately 10 days, while humidity is somewhat lower at 70%. For a closer look at the weather conditions in May, you can check Dandong weather in May.
September and June exhibit some similarities in temperature, particularly with both months reaching a maximum of 31°C (88°F). However, September tends to be cooler overall, with average temperatures of 19°C (67°F) compared to June's warmer average of 21°C (69°F). While September sees a minimum temperature of 3°C (38°F), June starts off at a milder 8°C (48°F). Additionally, precipitation in June is slightly higher at 100 mm (3.9 in) over 9 days, compared to September's 87 mm (3.4 in) over 7 days, and humidity levels are also marginally higher in June at 79% compared to 75% in September. For a closer look at June's weather specifics, visit Dandong weather in June.
In comparing the weather between September and July, September offers a much cooler range of temperatures, with a minimum of 3°C (38°F) and an average of 19°C (67°F), peaking at 31°C (88°F). In contrast, July experiences warmer conditions, with minimums around 15°C (60°F), an average of 25°C (77°F), and a maximum reaching 36°C (96°F). While September sees 87 mm (3.4 in) of precipitation over 7 days, July has more rainfall with 114 mm (4.5 in) across 13 days, and notably higher humidity levels at 85% compared to September's 75%. For a closer look at July's climate specifics, you can visit Dandong weather in July.
In comparing the weather between August and September, September shows a notable drop in temperature, with a minimum of 3°C (38°F) and an average of 19°C (67°F), while August boasts much warmer temperatures, featuring a minimum of 11°C (52°F) and an average of 25°C (76°F). August is marked by significantly higher precipitation at 272 mm (10.7 in) over 17 days compared to September's 87 mm (3.4 in) over just 7 days, indicating a drier month ahead. Additionally, humidity levels remain high in both months, with August at 86% and September slightly lower at 75%. For a closer look at August's weather patterns, you can visit Dandong weather in August.
September marks the transition from summer to fall, boasting a warm average temperature of 19°C (67°F) and maximum highs reaching 31°C (88°F). However, the month also sees a fair amount of precipitation with 87 mm (3.4 in) recorded over 7 days, accompanied by a humidity level of 75%. In contrast, October brings a notable drop in average temperatures to 11°C (53°F), with minimum temps dipping as low as -4°C (25°F), while maximums remain relatively warm at 29°C (84°F). Rainfall decreases to 59 mm (2.3 in) over the same number of days, and humidity rises slightly to 80%. For more detailed insights into the October weather, visit Dandong weather in October.
September and November present contrasting weather patterns, reflective of the transition from late summer to early winter. In September, temperatures are much warmer, averaging around 19°C (67°F), with highs reaching up to 31°C (88°F), while November sees a significant drop in temperatures, with an average of just 3°C (38°F) and a chilly minimum of -11°C (13°F). Precipitation is more abundant in September, totaling 87 mm (3.4 in) over about 7 days, compared to November's 61 mm (2.4 in) over 6 days. Humidity levels also show a slight decrease, with September at 75% and November at 70%. For more details on November’s climate, you can check Dandong weather in November.
September and December exhibit starkly contrasting weather patterns. In September, temperatures in Dandong range from a minimum of 3°C (38°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F). The month experiences a high level of humidity at 75% and receives 87 mm (3.4 in) of precipitation over about 7 days. In stark contrast, December sees much colder temperatures, with lows plunging to -20°C (-5°F) and highs only reaching 7°C (45°F), averaging -5°C (23°F). The precipitation drops significantly to just 12 mm (0.5 in) over 3 days, and humidity decreases to 58%. For more details on the December weather conditions, visit Dandong weather in December.
As summer transitions into autumn, September in Dandong offers a unique blend of warmth tempered by a subtle chill, setting it apart from the hotter months. Daily temperatures reflect a comfortable average, while occasional cool mornings hint at the impending fall. The month is marked by increased humidity and a fair share of rain, though the showers tend to be brief, allowing for plenty of opportunities to enjoy the scenic beauty of the region. Compared to the sweltering heat of July and August, September presents a refreshing shift, inviting visitors to explore the vibrant landscapes. For more insights on the climate year-round, visit Dandong Climate.