September Weather in Longjing, China

Last updated: August 21, 2025

September in Longjing, China showcases a delightful transition in weather, with temperatures reaching a pleasant maximum of 29°C (84°F) while comfortably averaging around 16°C (61°F). As the month unfolds, expect cooler evenings, with minimum temperatures dipping to 0°C (33°F). The region experiences moderate rainfall, accumulating around 80 mm (3.1 in) over approximately 8 days, contributing to the lush landscape. With humidity levels at a high 84%, the air is often thick and invigorating, perfect for those seeking to immerse themselves in the natural beauty of this enchanting locale.

September Temperature in Longjing

In September, Longjing begins to embrace the shift from summer's heat to the crispness of autumn. With minimum temperatures resting at a brisk 0°C (33°F) and an average of 16°C (61°F), the month marks a significant drop from the sweltering highs of August. The maximum temperature reaches a comfortable 29°C (84°F), providing perfect conditions for outdoor activities amidst the vibrant fall foliage. As summer's oppressive heat fades, September's pleasantly mild climate invites both locals and visitors to explore the stunning landscapes and cultural richness of this enchanting region.

September Weather in Longjing: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Longjing, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longjing, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec111733465664727060463015
Data source: Temperature data for Longjing generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Longjing

In September, Longjing experiences a significant shift in its precipitation patterns, recording 80 mm (3.1 in) of rain over 8 days. This marks a notable decrease from August's peak of 185 mm (7.3 in), yet still reflects the lingering effects of the summer monsoon season. As the month transitions into autumn, the rainfall begins to dwindle, comparable to the 79 mm (3.1 in) seen in June. The month serves as a bridge, balancing between the verdant aftermath of summer rains and the arrival of drier days ahead, setting the stage for the autumn's crispness while nurturing the area’s lush landscapes with essential moisture.

September Precipitation Trends in Longjing

The chart displays monthly precipitation patterns in Longjing, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Longjing, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec716283084799718580363410
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Longjing

In Longjing, China, September marks a transitional phase in humidity levels, experiencing an average of 84%—a slight decrease from the summer peak of 89% in August. Throughout the year, humidity fluctuates, beginning with a relatively high 78% in January and steadily decreasing to its lowest point of 65% in April. As the warmer months approach, humidity rises again, culminating in the steamy heights of 87% in July. As summer wanes, September maintains a notable level of humidity, hinting at the linger of summer’s warmth while paving the way for the cooler, dryer months ahead. This month reflects the climatic rhythm of Longjing, where seasonal shifts create a varied yet harmonious balance in moisture levels.

September Average Humidity in Longjing

This chart illustrates the average monthly humidity levels in Longjing, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Longjing is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%75%70%65%72%82%87%89%84%83%67%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Longjing

In September, Longjing, China, experiences a UV Index of 8, indicating a very high exposure level that demands mindfulness when enjoying outdoor activities. As summer wanes, sunlight intensity remains significant, with a burn time of just 15 minutes for unprotected skin. This trend highlights a tapering off of the peak UV exposure seen in July and August, where the index climbed to levels of 10 and 11. As fall approaches, residents and visitors should remain vigilant, as the UV levels are still potent enough to cause skin damage. For more information on how to protect yourself, check out Longjing UV Index.

Maximum UV Index Levels in Longjing for September

The chart shows the monthly maximum UV Index (UVI) for Longjing in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Longjing typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235781011108532
Data source: Longjing September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Longjing

September in Longjing, China, embraces a delightful transition from the summer's peak to the gentle embrace of autumn, with 279 hours of sunshine illuminating the month. Following a sun-drenched July and June, which boasted over 300 hours of bright days, September continues to offer a generous glow, though slightly reduced from the summer high. As the warmth of the sun begins to wane, it ushers in a rich tapestry of colors throughout the landscape, marking a time when the vibrancy of life is still palpable but begins to yield to the calming tones of fall. This month serves as a beautiful bridge between the hot summer and the cooler months ahead, ensuring that Longjing remains a radiant spot for both residents and visitors alike.

Monthly Sunshine Duration in Longjing: September Highlighted

The September sunshine duration represents the total number of hours Longjing experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec194h234h284h289h304h306h313h275h279h262h229h231h
Data source: Longjing September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Longjing During September

In Longjing, China, the likelihood of sunny weather takes a noticeable dip during the summer months, with July and August showcasing only a 23% and 25% chance of sunshine, respectively. As September rolls in, this trend continues, presenting a modest 29% chance of sunny days. Interestingly, transitioning into the fall, October sees a significant rebound to 56%, suggesting that while September may offer limited sun, the season rapidly improves, granting residents and visitors alike a more favorable climate for outdoor activities in the months that follow.

Percentage of Sunny Days in September in Longjing

The chart illustrates the percentage of sunny days in Longjing throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Longjing experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec60%51%56%51%37%29%23%25%29%56%50%66%
Data source: Longjing September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Longjing in September

In Longjing, China, the rhythm of daylight shifts gracefully throughout the year. Starting with a modest 9 hours in January, daylight duration slowly climbs to a peak of 15 hours in June, embodying the vibrant energy of summer. As autumn approaches, September sees a gentle decline in daylight to 12 hours; a transitional moment that signals the impending embrace of shorter days. This trend continues into October and November, where sunlight dwindles back to 11 hours and 9 hours, respectively, inviting cozy evenings and the serene beauty of winter. The interplay of longer and shorter days creates a dynamic tapestry that reflects the changing seasons in this picturesque region.

Average Daylight Hours in Longjing for September

The chart illustrates the variation in daylight duration in Longjing throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 25m10h 31m11h 56m13h 23m14h 37m15h 15m14h 56m13h 51m12h 27m11h 1m9h 44m9h 4m
Data source: Longjing daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Longjing

In Longjing, China, the September winds reflect an evident trend of decreasing speeds as summer gives way to autumn. With an average gust of just 1.8 m/s (4 mph), the winds are gentler compared to the earlier months of the year. From a lively 3.8 m/s (8 mph) in February to a sluggish drift in September, there’s a noticeable decline in the wind's vigor through the warmer months. This pattern culminates in the soft, whispering breezes of late summer, hinting at the calm before the impending cooler months, where wind speeds gradually pick up again in October. The transition captures the essence of Longjing’s seasonal shifts, where the softer September winds invite a sense of tranquility and reflection amid the natural beauty of the landscape.

Average September Wind Speed in Longjing

The chart displays monthly wind speed patterns in Longjing, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.13.82.92.92.42.01.92.41.8 m/s2.43.13.5
Data source: Longjing September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Longjing Compares to Other Months

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 stark contrasts in weather conditions. In September, temperatures range from a mild minimum of 0°C (33°F) to a warm maximum of 29°C (84°F), with an average temperature of 16°C (61°F). The month experiences approximately 80 mm (3.1 in) of precipitation over about 8 days, alongside a high humidity level of 84%. In contrast, January is characterized by frigid temperatures, with lows dipping to -26°C (-14°F) and a maximum of just 4°C (40°F), averaging around -11°C (12°F). This winter month sees significantly less precipitation, only about 7 mm (0.3 in) across just 1 day, and a relatively lower humidity of 78%. For more detailed information about January weather, you can check Longjing weather in January.

September and February offer stark contrasts in weather conditions. In September, temperatures range from a mild 0°C (33°F) at night to a warm 29°C (84°F) during the day, averaging around 16°C (61°F). This month also experiences relatively high humidity at 84%, with 80 mm (3.1 inches) of precipitation spread over eight days. In contrast, February brings much colder temperatures, with nighttime lows plummeting to -22°C (-7°F) and daytime highs only reaching up to 10°C (50°F), averaging at -8°C (17°F). This winter month sees significantly less precipitation at just 16 mm (0.6 inches) over three days and lower humidity levels at 75%. For more specific regional details, you can check Longjing weather in February.

The weather in September presents a much milder and more pleasant experience compared to March. With temperatures ranging from a minimum of 0°C (33°F) to a maximum of 29°C (84°F), and an average of 16°C (61°F), September typically boasts higher humidity at 84% and more precipitation, accumulating about 80 mm (3.1 in) over roughly 8 days. In contrast, March is characterized by colder temperatures, starting as low as -20°C (-4°F) and peaking at 24°C (75°F), with an average temperature of just 1°C (33°F). March experiences significantly less precipitation, totaling around 28 mm (1.1 in) over only 4 days, and lower humidity at 70%. For a detailed look at March weather, visit Longjing weather in March.

Comparing the weather in September and April reveals notable differences in temperature and humidity. September typically enjoys milder conditions with an average temperature of 16°C (61°F) and can reach a maximum of 29°C (84°F), while April, on the other hand, has a lower average of 8°C (46°F) and can experience even hotter days with a maximum of 34°C (93°F). Precipitation is more common in September, with 80 mm (3.1 in) over 8 days, compared to April's 29 mm (1.2 in) over 7 days. Additionally, September's humidity is significantly higher at 84%, making the air feel quite muggy, while April's humidity is more comfortable at 65%. For more specific details about April's weather, you can visit Longjing weather in April.

In September, temperatures range from a cool 0°C (33°F) to a warm 29°C (84°F), with an average of 16°C (61°F). The month experiences about 80 mm (3.1 in) of precipitation over approximately 8 days, and humidity hovers around a high 84%. In contrast, May offers a wider temperature range, with minimums starting at 0°C (32°F) and reaching up to a scorching 35°C (95°F), while averaging 14°C (57°F). Although rainfall is slightly higher at 84 mm (3.3 in) over around 12 days, the humidity is lower at 72%. For more specific details about weather conditions during May, check out Longjing weather in May.

When comparing the weather in September to that of June, notable differences emerge. September has a wider temperature range, with minimums dropping to 0°C (33°F) and maximums reaching 29°C (84°F), whereas June starts off warmer with minimums at 7°C (44°F) and can soar up to 33°C (92°F). Precipitation levels are quite similar, with September experiencing about 80 mm (3.1 in) over 8 days, while June sees slightly less rain at 79 mm (3.1 in) but over a more extended period of 13 days. Both months have relatively high humidity, with September at 84% and June slightly lower at 82%. For more details on June weather, you can visit Longjing weather in June.

When comparing the weather in September to that of July, notable differences emerge. September experiences cooler temperatures, with a minimum of 0°C (33°F) and an average reaching 16°C (61°F), while July boasts much warmer conditions, with minimum temperatures around 11°C (52°F) and an average of 22°C (72°F). The July maximum can soar to 35°C (95°F), contrasting sharply with September’s peak of 29°C (84°F). Additionally, while both months see significant rainfall, July records a higher total of 97 mm (3.8 in) over 10 days compared to September's 80 mm (3.1 in) across 8 days. Humidity is also slightly elevated in July at 87%, compared to September's 84%. For a closer look at July weather specifics, you can visit Longjing weather in July.

In comparison to August, September experiences cooler temperatures, with a minimum of 0°C (33°F) and an average of 16°C (61°F), while August maintains warmer conditions, highlighted by a minimum of 6°C (43°F) and an average of 21°C (71°F). Furthermore, August has significantly higher maximum temperatures, soaring to 35°C (96°F), compared to September's peak of 29°C (84°F). Precipitation is another notable difference; August has 185 mm (7.3 in) of rainfall over 16 days, while September sees a decrease in precipitation to 80 mm (3.1 in) over just 8 days. Humidity levels are also higher in August at 89%, compared to September's 84%. For more details on August's weather specifics, visit Longjing weather in August.

In September, the weather showcases a notable range, with minimum temperatures reaching 0°C (33°F) and average highs around 29°C (84°F), coupled with relatively high humidity at 84%. This month also experiences more precipitation, totaling 80 mm (3.1 in) over about 8 days, contributing to a lush landscape. In contrast, October brings a significant drop in average temperatures, averaging around 8°C (46°F) with lows dipping to -7°C (21°F), though it retains a maximum of 28°C (83°F) on warmer days. October is drier, with only 36 mm (1.4 in) of precipitation over 5 days and slightly lower humidity at 83%. For more detailed insights into October's weather in Longjing, check out Longjing weather in October.

September typically offers a warm climate, with average temperatures around 16°C (61°F) and highs reaching up to 29°C (84°F). It also experiences moderate humidity at 84% and receives approximately 80 mm (3.1 in) of precipitation over about 8 days. In contrast, November sees a notable drop in temperatures, with an average of -1°C (30°F) and a maximum of 18°C (65°F), while the minimum can plummet to -16°C (3°F). Precipitation decreases to 34 mm (1.3 in), occurring over just 4 days, and the humidity drops to 67%. As such, September is characterized by much milder weather compared to the stark chill of November. For more details, you can check out this link: Longjing weather in November.

September and December present strikingly different weather conditions. In September, temperatures range from a low of 0°C (33°F) to a high of 29°C (84°F), with an average of 16°C (61°F). The month experiences around 80 mm (3.1 in) of precipitation over approximately 8 days, paired with a relatively high humidity of 84%. In stark contrast, December sees much colder temperatures, with a minimum of -26°C (-14°F) and a maximum of just 6°C (42°F), averaging around -10°C (15°F). The month is significantly drier, with only 9 mm (0.4 in) of precipitation over just 1 day and lower humidity at 70%. For a deeper insight into December weather, you can check Longjing weather in December.

Compare Longjing's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Longjing

As September unfolds in Longjing, it's a captivating transition into autumn, marked by mild temperatures and a noticeable increase in humidity. Compared to the sweltering heat of summer, the weather here becomes more comfortable, allowing for enjoyable outdoor activities. With average temperatures hovering around a pleasant 16°C, you'll appreciate the mild days and cooler nights. However, the month also brings its share of moisture, with nearly a third of the days experiencing some rainfall. This blend of mild warmth and occasional showers creates a unique charm, making it a perfect time to experience the beautiful landscapes and vibrant culture of Longjing. For more on what to expect throughout the year, check out Longjing Climate.