Last updated: August 21, 2025
In Dalian, China, September brings a blend of warmth and moisture, with average temperatures hovering around 27°C (81°F). During this transitional month, the maximum temperature can reach up to 30°C (86°F), while the minimum dips to a comfortable 22°C (72°F). However, locals and visitors alike should prepare for potential rain, as September records an average precipitation amount of 102 mm (4.0 in) over approximately 15 days, accompanied by humidity levels around 70%. This combination of warmth and humidity creates a unique coastal climate, perfect for exploring the vibrant city and its stunning landscapes.
In September, Dalian, China, starts to transition from the sweltering summer heat, offering a pleasant reprieve. With minimum temperatures averaging around 22°C (72°F), the city enjoys a comfortable climate that gradually dips to an average of 27°C (81°F) and peaks at a delightful 30°C (86°F). This month marks a notable decrease from the scorching heights of August, making it an ideal time for outdoor activities and exploring the vibrant coastal scenery. As the warmth of summer begins to fade, September provides a perfect blend of lingering warmth and cooler breezes, paving the way for the crisp autumn months ahead.
In September, Dalian experiences a moderate precipitation of 102 mm (4.0 in), occurring over approximately 15 days. This month marks a noticeable shift from the heavy rains of August, which recorded 204 mm over 16 days, yet still showcases a significant amount of rainfall compared to the drier summer months. The precipitation trend highlights a gradual tapering after June's peak of 266 mm, with September striking a balance between the wetter months that precede it and the dryer days of autumn that lie ahead. As the city transitions into fall, these showers contribute to the lush greenery, enhancing Dalian's scenic beauty while also indicating a lingering summer climate.
As summer fades and autumn approaches, September in Dalian, China, brings a noticeable shift in humidity levels, dipping to 70%. This transition marks the end of a typically humid season, where peaks were observed in late spring and summer, with May and July reaching 85% and 84%, respectively. Interestingly, September's humidity is the lowest since March, highlighting a gradual decrease from the summer's sweltering embrace. Following a trend of consistent humidity levels throughout much of the year, September serves as a gentle reminder of autumn’s arrival, setting the stage for the cooler months ahead.
As September rolls into Dalian, the UV Index remains a noteworthy 11, categorized as extreme. This signals a marked decrease from the peak intensity of 13 seen in the summer months, yet the risk of harm from unprotected sun exposure is still significant. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to stay vigilant about sun safety. This trend reflects an overall high UV Index throughout the summer, which ranges from 12 to 13 from April through August, emphasizing the importance of protective measures during these months. As we transition into October, the UV Index is expected to drop to 9, indicating a shift towards more moderate conditions. For more detailed information on UV levels throughout the year, check out Dalian UV Index.
UV Risk Categories
September in Dalian, China, boasts a delightful 294 hours of sunshine, marking a slight dip from the sun-drenched heights of July and August, which enjoyed 331 and 312 hours, respectively. This month serves as a transition into autumn, where the lingering warmth of summer begins to wane. The sunny days not only invite residents and visitors to explore the coastal beauty but also reflect a notable trend throughout the year: a peak in sunshine during the summer months, with a gradual decline as the year progresses toward the cooler months of October and November. This seasonal rhythm makes September an ideal time to bask in the fading warmth, allowing one to relish the last golden rays before winter descends.
In September, Dalian, China, experiences a refreshing shift in weather patterns, with the chance of sunny days rising to an encouraging 58%. This marks a notable increase from the darker, cloudier months of June and July, where sunshine was less frequent, hovering around 6% and 29% respectively. As the summer heat wanes, residents and visitors alike can look forward to enjoying clearer skies and more pleasant temperatures, making September one of the sunniest months of the year in Dalian. This trend continues into the autumn, offering a delightful backdrop for outdoor activities and exploration.
As September arrives in Dalian, China, the city enjoys a pleasant 12 hours of daylight—a continuation of the ample sunlight that characterized the summer months. The transition from July's peak of 13 hours marks a subtle shift towards the shorter days of autumn. After a vibrant summer, September's daylight duration shows a harmonious balance, as it mirrors April and March's steady contributions. This gradual decline in daylight duration hints at the impending arrival of October's longer nights, inviting residents and visitors alike to savor the warm hues of early autumn in Dalian while they still can.
As the seasons transition into September, Dalian, China experiences a noticeable decrease in wind speed, averaging just 5.5 m/s (12 mph). This drop follows the summer months, where more robust wind patterns typically prevail, peaking at 7.3 m/s (16 mph) in both July and August. The softer breezes of September signal a shift towards the calmer autumn months, contrasting sharply with the upcoming October, which brims with renewed vigor at an average of 10.2 m/s (23 mph). This rhythmic ebb and flow of the wind not only sets the stage for changing weather but also reflects the enchanting dance of seasons that characterizes Dalian’s coastal charm.
Weather in Dalian varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dalian, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures are warm, ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 27°C (81°F). This month experiences considerable rainfall, with 102 mm (4.0 in) spread over 15 days, and a humidity level of 70%. In comparison, January is much cooler, featuring a minimum temperature of 6°C (43°F) and a maximum of 18°C (65°F), with an average of only 13°C (55°F). Precipitation drops to 58 mm (2.3 in) over just 8 days, while humidity slightly increases to 73%. For more detailed insights, you can check out Dalian weather in January.
In September, the weather is notably warm, with average temperatures hovering around 27°C (81°F) and highs reaching up to 30°C (86°F). The month experiences significant rainfall, with about 102 mm (4.0 in) spread over approximately 15 days, adding to the humidity level of 70%. In contrast, February offers a much cooler climate, with average temperatures dropping to 12°C (54°F) and maximums around 17°C (63°F). This month sees less rainfall, totaling 81 mm (3.2 in) over about 10 days, while humidity remains relatively high at 73%. For those interested in more details about the February climate, you can check Dalian weather in February.
September and March exhibit contrasting weather patterns. In September, temperatures are notably warmer, with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at 30°C (86°F). The month experiences significant rainfall, totaling 102 mm (4.0 in) over 15 days, accompanied by 70% humidity. In contrast, March presents cooler conditions, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 20°C (68°F) and an average of 14°C (58°F). While it receives slightly more precipitation at 128 mm (5.0 in) across 14 days, the humidity is higher at 80%. For more information on March weather, visit Dalian weather in March.
September and April present quite contrasting weather conditions. In September, temperatures are generally warmer, with averages around 27°C (81°F) and highs reaching up to 30°C (86°F), while humidity sits at 70%. The month experiences more rainfall, totaling 102 mm (4.0 in) over approximately 15 days. In contrast, April sees significantly cooler temperatures, averaging 18°C (64°F) with maximums of 24°C (75°F) and a lower minimum temperature of 12°C (53°F). Although April has slightly less precipitation at 93 mm (3.7 in) over 11 days, it experiences higher humidity at 81%. For more detailed insights, you can check Dalian weather in April.
In comparison, September offers warmer temperatures, with daily averages reaching around 27°C (81°F) and highs of up to 30°C (86°F), while May has cooler averages of 22°C (72°F) and a maximum of 27°C (82°F). However, May experiences higher humidity at 85% compared to September's 70%, making it feel more muggy. Additionally, May sees more precipitation, totaling 133 mm (5.2 in) over 12 days, whereas September has 102 mm (4.0 in) over 15 days. For more detailed insights, check out Dalian weather in May.
When comparing the weather in September and June, both months showcase relatively warm temperatures, with September slightly edging out June in average temperature at 27°C (81°F) compared to June's 26°C (79°F). The minimum and maximum temperatures remain constant at 22°C (72°F) and 30°C (86°F) for September, while June sees a max of 29°C (84°F). However, June experiences significantly higher precipitation, totaling 266 mm (10.5 in) over 14 days, in contrast to September's 102 mm (4.0 in) spread over 15 days. Furthermore, June has a higher humidity level at 81%, compared to September's 70%, indicating a more tropical feel in June. For a detailed look at June's weather patterns, you can check Dalian weather in June.
In comparing the weather between September and July, September generally presents warmer nights and a slightly cooler daily average temperature. With minimum temperatures around 22°C (72°F) and an average of 27°C (81°F), September offers a more comfortable climate compared to the warmer nights in July, which begin at a minimum of 25°C (78°F). However, July boasts a higher overall temperature, reaching up to 30°C (87°F), similar to September's peak.
A significant difference is in the precipitation levels: September experiences more rainfall, with 102 mm (4.0 in) over 15 days, while July sees only 53 mm (2.1 in) across just 5 days. This difference contributes to higher humidity in July at 84%, compared to September's 70%. For more details, you can check Dalian weather in July.
In comparing the weather in September and August, we see a slight decrease in temperature, with September experiencing a minimum of 22°C (72°F), an average of 27°C (81°F), and a maximum of 30°C (86°F), whereas August has a minimum of 25°C (78°F), an average of 28°C (83°F), and a maximum of 31°C (88°F). Additionally, September receives less precipitation at 102 mm (4.0 in) over 15 days compared to August's 204 mm (8.0 in) over 16 days. The humidity also tends to be lower in September at 70%, compared to August's 82%. For a more detailed look at August weather, you can check this Dalian weather in August.
September typically experiences warmer temperatures compared to October, with average daily highs of 27°C (81°F) falling to 23°C (75°F) in October. While September boasts a minimum temperature of 22°C (72°F), October's cooler nights begin at 18°C (64°F). Both months see a similar amount of rainfall, with September recording 102 mm (4.0 in) over 15 days and October slightly less at 98 mm (3.9 in) over 14 days. Humidity is slightly higher in October at 73%, compared to September's 70%, creating a more humid atmosphere as the month progresses. For more detailed information on October weather, visit Dalian weather in October.
September weather is characterized by warmer temperatures, with a minimum of 22°C (72°F) and an average of 27°C (81°F), reaching a maximum of 30°C (86°F). This month also sees significant rainfall, totaling 102 mm (4.0 in) over about 15 days, along with a humidity level of 70%. In contrast, November presents a cooler climate, with temperatures ranging from a minimum of 13°C (56°F) to an average of 19°C (67°F) and a maximum of 23°C (74°F). While November has slightly less precipitation at 83 mm (3.3 in) across 12 days, the humidity rises to 77%. For more detailed insights into November's weather, you can visit Dalian weather in November.
September and December exhibit contrasting weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 27°C (81°F). The month also sees significant rainfall, totaling 102 mm (4.0 in) over 15 days, and a humidity level of 70%. In stark contrast, December brings cooler temperatures, with a low of 8°C (47°F), an average of 15°C (59°F), and a high of 20°C (68°F). The precipitation decreases to 66 mm (2.6 in) spread across 11 days, while humidity slightly increases to 79%. For more detailed information about the weather in December, you can explore Dalian weather in December.
As summer transitions into fall, September in Dalian offers a delightful blend of warmth and occasional rain, distinguishing it from the drier summer months. With temperatures averaging around 27°C (81°F), the climate retains a pleasant warmth, while the 70% humidity can make it feel a bit more muggy. However, what sets September apart is its relatively higher precipitation, featuring about 15 rainy days and a total of 102 mm (4.0 in) of rainfall, infusing the landscape with lush greenery. This combination of warmth and moisture not only creates ideal conditions for outdoor activities but also marks the beginning of a shift towards cooler autumn weather. For more insights, visit Dalian Climate.