Last updated: August 21, 2025
In Longjing, China, September brings a mix of warmth and moisture, characterized by a maximum temperature reaching 31°C (87°F) and an average of 20°C (69°F). As temperatures dip to a minimum of 13°C (55°F), the month showcases a significant precipitation total of 187 mm (7.4 in) over approximately 18 damp days, resulting in a high humidity level of 77%. This climate transforms the landscape, making it an intriguing time for exploration and appreciation of the local natural beauty.
In September, Longjing, China ushers in a transition towards more temperate weather, with temperatures shifting noticeably. The minimum temperature of 13°C (55°F) offers a gentle warmth, while the average climbs to a comfortable 20°C (69°F). As summer begins to wane, the days still hold onto a hint of heat, reaching a delightful maximum of 31°C (87°F). This month marks a balance between the lingering warmth of summer and the crispness of autumn, making it an ideal time for outdoor exploration and enjoying the beautiful landscapes that Longjing has to offer. The trend of warming days coupled with cooler nights sets a pleasant tone for the coming fall, inviting both residents and visitors to savor the natural beauty of this enchanting region.
In September, Longjing experiences a notable continuation of the wet season, with precipitation reaching 187 mm (7.4 in) over approximately 18 days. While this marks a decrease from the deluge of July’s 362 mm (14.2 in), it still represents a healthy rainfall that supports the lush scenery characteristic of the region. The month sits at a crossroads, transitioning from the heavier torrential rains of summer into the more moderate and manageable conditions of autumn. As the days grow shorter and temperatures begin to dip, September's rainfall acts as a critical precursor to the drier months ahead, effectively nurturing the burgeoning landscape while setting the stage for the seasonal shift.
In September, Longjing, China experiences a noticeable dip in humidity, with levels averaging 77%. This decline marks a shift from the peak humidity of the summer months, notably July and August, which hover around 87% and 85%, respectively. As the country transitions into autumn, the more moderate September humidity signals a welcome relief from the oppressive conditions of the summer. While humidity levels rise again in November, peaking at 86%, the September drop offers a brief but refreshing interlude, hinting at the gradual changes in weather that accompany the changing seasons.
As summer transitions into fall, September in Longjing, China, maintains an extreme UV Index of 11, slightly dipping from the peak summer months. With a burn time of just 10 minutes, it's essential to stay protected from the sun's intense rays. This month echoes a larger trend of high UV exposure observed from April through August, where values ranged from 12 to 13, indicating a consistent risk for sunburn. Thankfully, as October approaches, the UV Index is expected to decrease to 9, making sun safety somewhat less critical. For detailed insights into UV trends throughout the year, visit Longjing UV Index.
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In September, Longjing, China, basks in an impressive 240 hours of sunshine, marking a harmonious blend of summer's warmth and autumn's arrival. This month continues the sunny momentum established over the previous months, culminating in the peak of August with 309 hours. As the seasons transition, the sunlight gradually begins to recede, contrasting with the earlier months where brightness flourished, especially in July and June with 299 and 263 hours, respectively. Notably, the drop in sunshine hours from August to September hints at the changing weather patterns, yet this is still significantly brighter than the winter months ahead, reinforcing September's reputation as a delightful precursor to the cooler season.
In Longjing, China, September stands out as a notably sunny month, boasting a 42% chance of sunshine. This slight surge in sunny days contrasts with the typically overcast conditions of the summer months, where July and August offer only 27% and 21% sunny prospects, respectively. As the season transitions from summer to fall, September's sunny disposition becomes a refreshing anomaly, surpassing even the winter months' chances, such as January's 41% and February's 35%. This trend highlights September as an optimal time for outdoor activities, inviting residents and visitors alike to enjoy the gentle warmth and clear skies before the cooler months set in.
As September unfolds in Longjing, China, daylight begins to wane, offering 12 hours of brightness, a slight dip from the summer's peak. This transition marks the beginning of autumn, as daylight hours gradually decrease after reaching a maximum of 14 hours in June. Following the vibrant days of summer, September serves as a gentle reminder of the changing seasons, with daylight holding steady for much of the month before slipping to 11 hours in October. This gradual reduction creates an inviting atmosphere, perfect for savoring the crisp air and vibrant foliage that heralds the approach of winter. Whether basking in the softer sunlight or enjoying the longer evenings, September embodies a beautiful balance between the lingering warmth of summer and the cool embrace of fall.
As September arrives in Longjing, China, the gentle whispers of the wind begin to echo a familiar tone. With an average wind speed of 1.3 m/s (3 mph), September marks a subtle uptick that aligns with the seasonal shift towards autumn. This gentle breeze, consistent with late summer and early fall patterns, reflects a serene transition, as earlier months like May and June exhibited slightly lower speeds of 1.1 m/s (2 mph). The winds pick up slightly again in October, maintaining that pleasant pace, while overall, the year showcases a remarkable stability in wind speeds across the seasons. This tranquil wind flow contributes to the enchanting atmosphere of Longjing, inviting residents and visitors alike to savor the beauty of their surroundings in this picturesque time of year.
Weather in Longjing varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Longjing, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild 13°C (55°F) at night to a warm 31°C (87°F) during the day, with an average temperature of 20°C (69°F). This month also sees significant rainfall, with 187 mm (7.4 in) over 18 days, contributing to a relatively high humidity level of 77%. In sharp contrast, January is characterized by much colder temperatures, with nighttime lows dropping to -7°C (20°F) and daytime highs reaching only 14°C (57°F), averaging just 3°C (38°F). Precipitation in January is notably lower, at 53 mm (2.1 in) over 10 days, and humidity remains at a cooler 72%. For more details on January weather, see Longjing weather in January.
September and February present stark contrasts in weather. September boasts warmer temperatures, with averages around 20°C (69°F) and maximums reaching up to 31°C (87°F), while February experiences much colder conditions, with average temperatures hovering around just 5°C (42°F) and lows dipping to -4°C (25°F). In terms of precipitation, September is significantly wetter, receiving 187 mm (7.4 in) over 18 days, compared to February's 56 mm (2.2 in) across only 10 days. Humidity levels are relatively similar, with September at 77% and February slightly lower at 76%. For more details about February weather, you can check Longjing weather in February.
In September, the weather tends to be significantly warmer compared to March, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 31°C (87°F) and an average of 20°C (69°F). This month experiences higher precipitation, totaling 187 mm (7.4 in) over 18 days, and a humidity level of 77%. In contrast, March features cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 26°C (79°F), yielding an average temperature of only 10°C (51°F). While it sees less rainfall at 116 mm (4.6 in) across 14 days, the humidity increases to 87%. For more detailed insights about the weather in March, you can refer to the following link: Longjing weather in March.
In September, temperatures tend to be warmer, with a minimum of 13°C (55°F) and an average of 20°C (69°F), peaking at 31°C (87°F). This month also sees significant rainfall, totaling 187 mm (7.4 in) over about 18 days, contributing to a humidity level of 77%. In contrast, April experiences milder temperatures, ranging from a chilly minimum of 3°C (38°F) to a more moderate average of 14°C (58°F) and a maximum of 29°C (84°F). April is generally drier, with 139 mm (5.5 in) of precipitation falling over 14 days and a slightly higher humidity of 82%. For more details on the weather patterns in this month, you can check Longjing weather in April.
When comparing the weather in September and May, both months share a maximum temperature of 31°C (87°F), but the temperatures fluctuate more in September with an average of 20°C (69°F) compared to May's 18°C (65°F). September experiences higher minimum temperatures, with lows around 13°C (55°F), whereas May starts cooler at 9°C (48°F). Precipitation is also notable in both months, with September receiving 187 mm (7.4 in) over 18 days and May just slightly wetter with 201 mm (7.9 in) over 15 days. Humidity levels remain relatively high, peaking at 83% in May compared to 77% in September. For a closer look at May weather specifics, visit Longjing weather in May.
In comparing the weather of September and June, we observe that both months start with a minimum temperature of 13°C (55°F). However, June generally sees slightly warmer averages and maximum temperatures, with an average of 22°C (72°F) and a maximum of 33°C (91°F), compared to September's average of 20°C (69°F) and maximum of 31°C (87°F). Precipitation levels are notably higher in June, recording 249 mm (9.8 in) over 17 days, in contrast to September’s 187 mm (7.4 in) over 18 days. Humidity is also higher in June at 84%, compared to September's 77%. For more detailed insights, you can check Longjing weather in June.
September weather tends to be milder compared to the hotter days of July. In September, temperatures range from a minimum of 13°C (55°F) to a maximum of 31°C (87°F), with an average of 20°C (69°F). In contrast, July sees warmer temperatures, with a minimum of 17°C (64°F), an average of 24°C (75°F), and a peak of 34°C (93°F). While September experiences an average of 18 rainy days with a total precipitation of 187 mm (7.4 in), July is considerably wetter, with 22 rainy days and 362 mm (14.2 in) of rainfall. Additionally, July has slightly higher humidity levels at 87% compared to September's 77%. For more detailed information, you can refer to Longjing weather in July.
In comparing the weather of September to August, September presents cooler temperatures with a minimum of 13°C (55°F) and an average of 20°C (69°F), contrasted with August's warmer minimum of 16°C (60°F) and average of 24°C (76°F). While both months experience significant precipitation, September has a slightly higher total at 187 mm (7.4 in) over 18 days, compared to August's 181 mm (7.1 in) over 20 days. Additionally, humidity levels are somewhat lower in September at 77%, compared to the more humid conditions in August, which averages around 85%. For a detailed look at August's weather, you can check out Longjing weather in August.
September tends to be warmer than October, with average temperatures reaching 20°C (69°F) compared to October's cooler average of 15°C (59°F). The maximum temperatures in September can soar up to 31°C (87°F), while in October, even though it also peaks at 30°C (87°F), the overall feel is much cooler due to lower minimum temperatures, dropping to 7°C (44°F). Precipitation is more frequent in September, with 187 mm (7.4 in) falling over 18 days, whereas October sees a reduction in rainfall, totaling 126 mm (5.0 in) over just 12 days. Interestingly, October also has a higher humidity level at 81% compared to September's 77%. For more detailed information, you can check this link: Longjing weather in October.
September and November present contrasting weather patterns. September boasts a warm average temperature of 20°C (69°F), with daytime highs reaching up to 31°C (87°F) and significant humidity at 77%. The month experiences considerable rainfall, totaling 187 mm (7.4 in) across 18 days, making it a relatively wet period. In stark contrast, November sees much cooler conditions, with an average temperature of just 10°C (50°F), and nighttime lows dropping to 1°C (33°F). Precipitation decreases significantly to 68 mm (2.7 in) over only 10 days, while humidity rises slightly to 86%. This shift reflects the transition from the warmth of early autumn to the chill of late fall. For more details on November weather in this region, check Longjing weather in November.
The comparison between September and December weather highlights a striking transition from warmth to chill. In September, temperatures range from a mild minimum of 13°C (55°F) to a warm maximum of 31°C (87°F), with an average of 20°C (69°F). The month experiences significant precipitation, totaling 187 mm (7.4 in) over 18 days, coupled with a humidity level of 77%.
In contrast, December brings a sharp decline in temperature, with minimums dropping to -4°C (24°F) and a much lower average of 5°C (41°F). The maximum is also cooler at 15°C (59°F). Precipitation decreases notably to just 38 mm (1.5 in) over 10 days, while humidity rises slightly to 81%. This change signifies the onset of winter as the weather shifts from the remnants of summer warmth to a cold, damp climate. For more detailed insights, you can check Longjing weather in December.
September in Longjing presents a unique blend of warmth and moisture, marking a transition from the hot summer months to a more temperate autumn. With average temperatures hovering around a comfortable 20°C, the month offers a reprieve from the sweltering heat, yet still showcases peak highs reaching 31°C. The frequent rainfall, with over half the month experiencing precipitation, contributes to a lush, vibrant landscape, but also raises humidity levels, creating a sticky atmosphere that's quite different from the drier summer. For anyone planning a visit, understanding this kaleidoscope of weather is essential. Dive deeper into the climatic nuances by exploring the details in Longjing Climate.