Last updated: August 21, 2025
Experience the vibrant September weather in Dalian, China, where the maximum temperature can soar to 31°C (88°F), offering a warm embrace during the day. With an average temperature of 20°C (68°F), the evenings remain pleasantly cool, ideal for leisurely strolls along the coast. However, be prepared for some refreshing rain, as the city experiences around 97 mm (3.8 in) of precipitation over 9 days throughout the month. The humidity level, averaging at 72%, contributes to the city's summer-like feel, making September a unique time to explore Dalian's beautiful landscapes and rich culture.
As September rolls into Dalian, China, the city experiences a delightful transition into autumn. With minimum temperatures around 6°C (42°F) and an average climbing to a pleasant 20°C (68°F), it offers a welcome reprieve from the summer heat. The maximum temperatures can reach a comfortable 31°C (88°F), providing plenty of opportunities for outdoor activities as the air begins to cool. This month marks a progressive shift from the sweltering peak of summer, showcasing a gradual decline in temperature as the city's vibrant landscape begins to transform with the seasonal changes. With September's mild climate, it’s an ideal time to explore Dalian’s natural beauty and cultural offerings before the chill of autumn sets in.
In September, Dalian experiences a noticeable decline in precipitation compared to the previous month, with a total of 97 mm (3.8 in) of rain falling over 9 days. This moderate rainfall serves as a transition from the heavy downpours of August, which recorded 216 mm (8.5 in) over 15 days. The shift heralds the onset of autumn, where rainfall becomes more manageable, yet still significant enough to contribute to the region’s lush landscapes. As the city heads into October, the weather further stabilizes with a decrease in precipitation to 50 mm (2.0 in), indicating a slow but steady shift towards drier conditions.
As summer fades into autumn, September in Dalian, China, presents a notable shift in humidity levels, averaging 72%. While still high, this figure marks a decline from the peak levels experienced in July and August, where humidity soared to 82% and 83% respectively. The transition reflects a gradual easing of the oppressive summer mugginess, likely bringing a more comfortable climate for outdoor activities. However, as the month progresses, humidity levels remain elevated compared to earlier months, such as February's notably lower average of 44%. This trend sets the stage for October’s increase to 76%, hinting at a lingering warmth in the air before the cooler months settle in.
As summer fades, September in Dalian, China, brings a slight decline in UV intensity, with the UV Index settling at 7, categorized as high. This marks a shift from the peak levels of 10 seen in July and August, yet there's still a considerable risk for sunburn, with a burn time of 25 minutes for fair-skinned individuals. The month offers a comfortable transition towards autumn, but sun safety remains vital as the index indicates the need for protective measures against harmful rays. For more insights on the UV Index throughout the year, you can explore Dalian UV Index.
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September in Dalian, China, offers a delightful transition from the summer's peak brightness to the subtle charms of autumn. With 282 hours of sunshine, September maintains a robust sun-kissed aura, although it marks a gentle decline from the sun-drenched high of 327 hours in July. This month bridges the vibrant warmth of summer and the softening glow of fall, providing an inviting atmosphere for outdoor activities. Following a trend of decreasing daylight, September still shines brightly compared to the earlier months, notably exceeding the 202 hours of January and the mid-spring lows. As the days gradually shorten, September presents a perfect opportunity to revel in the lingering warmth before the cooler months approach.
As September rolls into Dalian, China, the likelihood of sunny weather dips to 38%, marking a notable decline from the sunnier months of mid-summer. This transition reflects a broader trend, as the chance of bright days decreases from the peak of 72% in February down to a low in July and August, where it reaches 34% and 44%, respectively. However, September’s potential for sunshine is just a precursor to the clearer skies of October, which bolster the forecast back to 61%. This seasonal ebb and flow indicates that while September may not be the sunniest month, it does set the stage for a return to brighter days ahead.
As September graces Dalian, China, the city enjoys a transition to shorter days, with daylight lasting approximately 12 hours. This marks a gentle decline from the sun-drenched summer months, where June peaked at 15 hours of sunlight. Following the vibrant days of July and August, September introduces a more balanced atmosphere, gradually paving the way for autumn's shorter daylight hours. Interestingly, daylight duration fluctuates throughout the year, from a modest 9 hours in January and December up to the summer zenith, reflecting the rhythmic dance of the seasons. As nature begins to shift, the golden hues of September sunsets invite residents to savor the waning warmth before the chill of winter settles in.
As September arrives in Dalian, China, the wind takes on a gentle quality, averaging 2.9 m/s (7 mph)—slightly up from the calmness of August but still among the lighter breezes of the year. This transitional month signals a subtle shift in the rhythm of coastal life, as the winds begin to pick up slightly in preparation for the upcoming autumn. Notably, September's wind speed is part of a broader trend; the spring and summer months experienced milder winds, with July reaching a low of 3.1 m/s (7 mph). In contrast, the winds tend to regain momentum as the year progresses into October and November, where speeds rise to 3.7 m/s (8 mph) and 3.9 m/s (9 mph), respectively. Thus, while September offers a serene atmosphere ideal for enjoying the late summer sun, it also hints at the invigorating breezes that autumn will bring.
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 presents a much warmer climate compared to January, with temperatures ranging from a comfortable 6°C (42°F) at night to a high of 31°C (88°F) during the day, averaging around 20°C (68°F). The month also experiences significant precipitation, with about 97 mm (3.8 in) falling over an average of 9 days and a humidity level of 72%. In stark contrast, January brings a notable chill, with temperatures plummeting to a minimum of -23°C (-9°F) and only reaching a maximum of 7°C (44°F), averaging -8°C (19°F). The winter month sees minimal precipitation of just 4 mm (0.2 in) over 1 day and lower humidity at 54%. For more detailed information on January weather specifics, check out Dalian weather in January.
September and February present vastly different weather patterns. In September, temperatures range from a mild minimum of 6°C (42°F) to a warm maximum of 31°C (88°F), with an average of 20°C (68°F). It experiences moderate precipitation with about 97 mm (3.8 in) falling over 9 days, contributing to a high humidity level of 72%. In contrast, February is much colder, featuring temperatures that can plummet to a minimum of -20°C (-3°F) and typically staying below freezing, with an average of -4°C (25°F) and a maximum of just 13°C (56°F). Precipitation in February is significantly lower at 8 mm (0.3 in) over just 2 days, and humidity drops to 44%. For more detailed insights into the February climate, you can check Dalian weather in February.
September and March present a stark contrast in weather conditions. In September, temperatures range from a mild 6°C (42°F) at night to a warm 31°C (88°F) during the day, with an average temperature of 20°C (68°F). This month sees significant precipitation, averaging 97 mm (3.8 in) over about 9 days, and a higher humidity level of 72%. In contrast, March experiences a much colder climate, with temperatures dipping as low as -12°C (11°F) and peaking at 19°C (67°F), averaging only 4°C (40°F). The precipitation is considerably less, totaling just 13 mm (0.5 in) over 3 days, and the humidity is lower at 48%. For more detailed information, check out Dalian weather in March.
In September, the weather is considerably warmer, with average temperatures reaching around 20°C (68°F) and maximums peaking at 31°C (88°F), compared to April's cooler average of 13°C (55°F) and maximums of 30°C (86°F). While September experiences more rain, with about 97 mm (3.8 in) falling over 9 days, April has much less precipitation, totaling only 27 mm (1.1 in) over 5 days. Additionally, humidity levels are higher in September at 72%, while April enjoys a drier atmosphere with a humidity level of 55%. For a closer look at what to expect in April, check out Dalian weather in April.
In comparing the weather of September and May, notable differences can be observed. September offers a broader temperature range, with minimums around 6°C (42°F) and maximums peaking at 31°C (88°F), while May is slightly cooler, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 34°C (94°F). Precipitation levels are higher in September, with 97 mm (3.8 in) over 9 days, compared to May’s 62 mm (2.4 in) over 7 days. Additionally, September's humidity is higher at 72%, giving the late summer month a more muggy feel, while May's average humidity sits at 65%, making it somewhat more comfortable. For more detailed information, you can refer to Dalian weather in May.
In comparing the weather between September and June, we see a notable shift in temperatures and precipitation patterns. September boasts a wider temperature range with minimums dipping to 6°C (42°F) and maximums reaching up to 31°C (88°F), averaging around 20°C (68°F). In contrast, June presents warmer conditions, with minimum temperatures starting at 12°C (54°F) and peaking at 38°C (100°F), resulting in an average of 23°C (74°F). While September experiences slightly more precipitation at 97 mm (3.8 in) over 9 days, June sees a bit less rain at 77 mm (3.0 in) across 8 days. Humidity levels are comparable, hovering around 71-72%. For a closer look at June weather specifics, visit Dalian weather in June.
In comparing the weather between September and July, September presents a more moderate climate with daytime averages around 20°C (68°F), while July experiences warmer temperatures, averaging 27°C (80°F). Nighttime lows in September can dip to 6°C (42°F), significantly cooler than July's minimum of 16°C (61°F). Although both months see similar levels of precipitation—with September at 97 mm (3.8 in) over 9 days and July slightly higher at 99 mm (3.9 in) over 11 days—July has a higher humidity level at 82%, compared to September's 72%. For a more detailed look at July's weather, you can refer to Dalian weather in July.
In comparing the weather between August and September, we notice a distinct shift. August boasts higher average temperatures, with a minimum of 10°C (50°F) and a peak of 38°C (101°F), while September sees cooler averages, ranging from a minimum of 6°C (42°F) to a maximum of 31°C (88°F). Additionally, September experiences significantly less rainfall, with 97 mm (3.8 in) over 9 days compared to August's 216 mm (8.5 in) over 15 days. Humidity levels also decline from 83% in August to 72% in September, making the latter month feel more comfortable. For a detailed look at the weather patterns in August, check out Dalian weather in August.
September typically showcases a warmer climate, with average temperatures around 20°C (68°F) and highs reaching up to 31°C (88°F). The month experiences more rainfall, totaling 97 mm (3.8 in) across about 9 days, while humidity is relatively moderate at 72%. In contrast, October brings a significant drop in temperatures, with minimums dipping to -2°C (28°F) and an average of 12°C (53°F). The days are shorter and cooler, yet the maximum temperature can still reach 29°C (85°F). Additionally, October sees less rainfall at 50 mm (2.0 in) over 5 days, accompanied by slightly higher humidity levels at 76%. For more detailed insights, check out Dalian weather in October.
September offers warm temperatures, with a comfortable average of 20°C (68°F) and highs reaching up to 31°C (88°F). However, it is also quite humid at 72%, with approximately 97 mm (3.8 in) of precipitation over about 9 days. In contrast, November brings a significant drop in temperatures, where the average falls to just 3°C (38°F), and even the daytime highs only reach 21°C (70°F). The month is drier, featuring only 32 mm (1.3 in) of precipitation over 4 days, along with a slightly lower humidity of 66%. For more detailed insights on November weather, you can refer to Dalian weather in November.
In September, the weather is warm and inviting, with average temperatures ranging from a cool 6°C (42°F) at night to a hot 31°C (88°F) during the day. The month experiences considerable rainfall, with 97 mm (3.8 in) of precipitation over about 9 days, and a humidity level of 72% that adds to the summer feel. In stark contrast, December brings a frigid chill, with temperatures plummeting to a minimum of -18°C (-1°F) and an average high of only 11°C (52°F). Precipitation drops significantly, with only 7 mm (0.3 in) over just 1 day, and humidity levels decrease to 52%, reflecting the dry, cold air of winter. For a more detailed overview, check out Dalian weather in December.
As September unfolds in Dalian, the weather starts to shift distinctly from the sweltering summer heat, offering a more temperate climate that's both refreshing and inviting. With an average temperature around 20°C (68°F), the month strikes a balance that encourages outdoor activities while keeping humidity comfortably manageable at 72%. Rainfall makes a milder appearance, with approximately nine days experiencing precipitation, contrasting sharply with the dry spells of summer. This blend of warmth and the occasional shower makes September an ideal time to explore the natural beauty and vibrant atmosphere of Dalian. For a more comprehensive overview of weather patterns throughout the year, visit Dalian Climate.