September Weather in Longquan, China

Last updated: August 21, 2025

In September, Longquan, China experiences a blend of warm days and cool nights, with maximum temperatures reaching 31°C (88°F) and a comfortable average of 22°C (72°F). As the month progresses, temperatures can dip to a refreshing minimum of 8°C (46°F), offering a pleasant respite from the heat. The region sees 74 mm (2.9 in) of precipitation spread over 7 days, contributing to the lush greenery characteristic of this time of year. With an inviting humidity level of 74%, September in Longquan is perfect for those who enjoy milder weather and occasional rain, making it an enchanting time to explore this picturesque locale.

September Temperature in Longquan

In September, Longquan, China, experiences a delightful transition from summer to autumn, with temperatures showcasing a notable shift. The minimum temperature hovers around 8°C (46°F), offering a refreshing coolness compared to the sweltering July and August months. The average temperature reaches a comfortable 22°C (72°F), making it an ideal time for outdoor activities as the weather is neither too hot nor too cold. With a maximum temperature peaking at 31°C (88°F), September provides the perfect balance between warmth and mildness, setting the stage for the upcoming fall. This month signals the diminishing heat of summer while inviting cooler days ahead, making it a wonderful time to explore the scenic beauty of Longquan.

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

The chart illustrates September temperature patterns in Longquan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longquan, 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).
JanFebMarAprMayJunJulAugSepOctNovDec313444546573797972594735
Data source: Temperature data for Longquan 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 Longquan

September brings a notable shift in precipitation patterns for Longquan, China, with 74 mm (2.9 in) of rain recorded over 7 days. This amount marks a decline from the peak of the summer months, particularly July and August, which saw significant rainfall at 134 mm and 130 mm, respectively. As the transition to autumn begins, September’s rainfall is representative of a gentle tapering off, setting the stage for the drier months ahead. With an increase in wet days from the earlier months, this early autumn period enriches the landscape, providing much-needed moisture before the drier October arrives.

September Precipitation Trends in Longquan

The chart displays monthly precipitation patterns in Longquan, 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 Longquan, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec15172339556613513074273020
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Longquan

In Longquan, China, September marks a transitional shift in humidity, settling at a comfortable 74%. Following the sweltering summer months where humidity peaked at 93% in July, the air begins to feel noticeably drier as autumn approaches. This decline from the high levels of August (91%) creates a refreshing atmosphere, making September more pleasant. Interestingly, the humidity consistently remains above 60% throughout the year, with a notable peak in June and July, suggesting a tropical influence during the warmer months. As temperatures drop in October and November, humidity levels are expected to follow suit, enhancing the overall seasonal transition in this region.

September Average Humidity in Longquan

This chart illustrates the average monthly humidity levels in Longquan, 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 Longquan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%62%69%81%82%86%93%91%74%72%71%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Longquan

As summer transitions to autumn in Longquan, China, the UV Index begins to drop but remains significant. In September, the UV Index stands at 8, classified as very high, which means outdoor enthusiasts should still take precautions, as the burn time is about 15 minutes. This decrease from the extreme peaks seen in July and August indicates a gradual easing of intensity, yet it's a reminder that UV protection remains crucial during this month. With the earlier months showing a steady rise in UV levels—from a moderate 3 in January to an extreme 11 in July—the trend highlights the importance of being sun-smart as the seasons change. For more details on UV levels throughout the year, visit Longquan UV Index.

Maximum UV Index Levels in Longquan for September

The chart shows the monthly maximum UV Index (UVI) for Longquan 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 Longquan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346991011118743
Data source: Longquan 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 Longquan

As September arrives in Longquan, China, the sun continues to shine brightly, delivering 280 hours of sunlight—a slight dip from the peak summer months but still favorable for outdoor activities. Following a vibrant July and August, which boasted 330 and 311 hours of sun respectively, September marks the beginning of a gradual transition into autumn. The sunshine hours begin to wane, a trend that persists into October, while remaining significantly higher than the earlier months of the year. This moderate sunlight in September not only enhances the natural beauty of Longquan but also offers a perfect balance for those looking to enjoy the last warm days before the cooler months set in.

Monthly Sunshine Duration in Longquan: September Highlighted

The September sunshine duration represents the total number of hours Longquan 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.
JanFebMarAprMayJunJulAugSepOctNovDec189h240h287h293h322h319h330h311h280h264h234h227h
Data source: Longquan September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Longquan During September

September in Longquan, China, brings a refreshing transition towards autumn, with the likelihood of sunny weather resting at a moderate 43%. This figure reflects a slight recovery from the peak summer months, where the chance of sunshine dips significantly to 29% in July. As the seasons change, sunny days become more frequent, drawing closer to the more promising percentages seen in early spring and late fall. With October also showing a comparable 42% chance of sun, September serves as a bridge, making it a pleasant time to enjoy the outdoors before the clouds of winter set in.

Percentage of Sunny Days in September in Longquan

The chart illustrates the percentage of sunny days in Longquan 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 Longquan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec46%54%48%45%52%39%29%43%43%42%58%58%
Data source: Longquan September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Longquan in September

In Longquan, China, September marks a gentle transition in daylight hours, with the duration dipping to 12 hours. This shift reflects the gradual move from the long, sun-drenched days of summer to the cooler hues of autumn. Starting from the year’s peak daylight in May through July, when the sun brightens the sky for 14 hours, the daylight begins to recede, gradually leading into October's 11 hours. This pattern not only highlights the cyclical nature of the seasons but also invites the community to embrace the cozy changes that early autumn brings, as daylight diminishes alongside the vibrant summers.

Average Daylight Hours in Longquan for September

The chart illustrates the variation in daylight duration in Longquan throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 54m10h 48m11h 57m13h 9m14h 9m14h 39m14h 24m13h 31m12h 23m11h 12m10h 10m9h 38m
Data source: Longquan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Longquan

As September arrives in Longquan, China, the average wind speed settles at a gentle 3.0 m/s (7 mph), a slight dip compared to the breezier summer months. Throughout the year, wind patterns reveal a gradual decline from the more robust gusts of May and June, which hover around 3.8 m/s (9 mph), to the softer whispers of late summer. This transition culminates in September, a month where the winds soften to invite the onset of autumn. What's notable is that after a low in August, the September breezes provide a refreshing change, signaling a return to the calmer winds characteristic of the later fall months, while still retaining a touch of warmth from the summer's end.

Average September Wind Speed in Longquan

The chart displays monthly wind speed patterns in Longquan, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.73.93.43.73.83.23.12.43.0 m/s3.23.43.6
Data source: Longquan September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Longquan Compares to Other Months

Weather in Longquan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Longquan, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present two distinct weather experiences. In September, temperatures range from a mild 8°C (46°F) to a warm 31°C (88°F), with an average of 22°C (72°F). This month sees considerable precipitation at 74 mm (2.9 in) over about 7 days, contributing to a humid atmosphere with 74% humidity. In contrast, January's climate is significantly colder, with temperatures plummeting to a minimum of -12°C (11°F) and an average of -1°C (31°F), reaching a maximum of 10°C (51°F). Precipitation is minimal in January, totaling just 15 mm (0.6 in) over 2 days, and the humidity drops to a drier 65%. For more information, you can explore Longquan weather in January.

September and February present contrasting weather experiences. In September, temperatures range from a cool 8°C (46°F) at night to a warm 31°C (88°F) during the day, with an average temperature of 22°C (72°F). This month sees significant precipitation of 74 mm (2.9 in) over about 7 days, coupled with a relatively high humidity level of 74%. In sharp contrast, February features a much colder climate, with nighttime temperatures plummeting to -13°C (9°F) and only reaching a maximum of 24°C (76°F) during the day, averaging just 1°C (34°F). Precipitation is minimal at 17 mm (0.7 in) over 3 days, and humidity is lower at 62%. For more details on February weather, you can check Longquan weather in February.

When comparing the weather in September and March, notable differences emerge in temperature and precipitation patterns. September experiences milder temperatures, ranging from a minimum of 8°C (46°F) to a maximum of 31°C (88°F), with an average of 22°C (72°F). This month also sees relatively high humidity at 74% and significant precipitation of 74 mm (2.9 in) over about 7 days. In contrast, March presents a chillier climate, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 23°C (73°F) and an average of just 7°C (44°F). Precipitation is lighter in March at 23 mm (0.9 in) over only 3 days, and humidity is slightly lower at 69%. For further details about the weather in March, you can check Longquan weather in March.

September and April present contrasting weather patterns, with September typically enjoying warmer temperatures. In September, the average temperature reaches a comfortable 22°C (72°F), with highs peaking at 31°C (88°F), while April experiences cooler conditions, averaging only 12°C (55°F) and dipping as low as -2°C (29°F) at night. Precipitation is also more prevalent in September, accumulating to 74 mm (2.9 in) over about 7 days, compared to April's lighter rainfall of 39 mm (1.5 in) over 5 days. Additionally, September has a humidity level of 74%, slightly lower than April's 81%, suggesting that April may feel a bit more humid despite the cooler temperatures. For more details on April weather specifically, you can visit Longquan weather in April.

In comparing the weather of September and May, we observe some notable differences. September tends to be warmer, with average temperatures reaching 22°C (72°F) and maximums soaring to 31°C (88°F). In contrast, May has a cooler average of 18°C (65°F) and maximums that can spike to a striking 37°C (99°F), indicating a wider temperature range. Precipitation levels are higher in September, totaling 74 mm (2.9 in) over 7 days, while May experiences less rain at 55 mm (2.2 in) across 6 days. Additionally, the humidity is slightly lower in September at 74%, compared to May's humidity of 82%. For a detailed look at May's climate, you can refer to Longquan weather in May.

In comparing the weather of September and June, we observe some notable differences. September experiences a wider temperature range, with minimums dropping to 8°C (46°F) and maximums reaching up to 31°C (88°F), while the average temperature hovers around 22°C (72°F). Conversely, June is slightly warmer, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 35°C (95°F), and an average of 23°C (73°F). Precipitation is relatively similar between the two months, with September receiving 74 mm (2.9 in) over seven days and June seeing 66 mm (2.6 in) over six days, though June tends to be more humid, with humidity levels at 86% compared to September's 74%. For further details on June's weather, you can check Longquan weather in June.

In comparing the weather between September and July, September typically experiences a broader temperature range, with minimums around 8°C (46°F) and maximums reaching up to 31°C (88°F). This contrasts with July, where minimum temperatures start significantly higher at 17°C (63°F) and can peak at 36°C (96°F), contributing to an overall warmer average of 26°C (79°F). Notably, July also sees more precipitation, totaling 134 mm (5.3 in) over 11 days, compared to September's 74 mm (2.9 in) across 7 days. Additionally, humidity levels are higher in July at 93%, making it feel more oppressive compared to September's relatively milder 74%. For a closer look at July weather, visit Longquan weather in July.

In comparing the weather between August and September, it is evident that September presents a more moderate climate. While August experiences higher temperatures with a minimum of 17°C (63°F) and an average of 26°C (80°F), September's temperatures are cooler, featuring a minimum of 8°C (46°F) and an average of 22°C (72°F). August also sees more extreme highs, reaching up to 36°C (97°F), compared to September's maximum of 31°C (88°F). Additionally, September receives less precipitation, totaling 74 mm (2.9 in) over 7 days, whereas August has significantly more rain with 130 mm (5.1 in) spread over 14 days. The humidity levels further contribute to the discomfort in August at 91%, while September's humidity is a more manageable 74%. For those looking for details on August weather specifically, you can find more information here: Longquan weather in August.

September's weather typically boasts a warmer average temperature of 22°C (72°F), with a range that peaks at a high of 31°C (88°F) and dips to a minimum of 8°C (46°F). The month sees about 74 mm (2.9 in) of precipitation spread over 7 days, along with relatively high humidity levels at 74%. In contrast, October presents a notable drop in temperature, with an average of 15°C (59°F), a minimum of 3°C (37°F), and a high that matches September's at 31°C (87°F). Precipitation decreases significantly to 27 mm (1.1 in) over just 4 days, along with slightly lower humidity at 72%. For more detailed information, you can visit Longquan weather in October.

In September, the weather is warm, with average temperatures around 22°C (72°F) and maximum highs reaching up to 31°C (88°F), creating a pleasant atmosphere ideal for outdoor activities. However, it experiences a fair amount of precipitation, totaling 74 mm (2.9 in) over approximately 7 days, alongside humidity levels around 74%. In contrast, November brings a notable drop in temperature, with averages falling to 9°C (48°F) and morning lows dipping as low as -5°C (23°F). The month sees considerably less precipitation at 29 mm (1.2 in) over 4 days and slightly lower humidity at 71%. For more detailed information about November weather, you can visit Longquan weather in November.

In September, the weather is generally warm with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 31°C (88°F) and an average of 22°C (72°F). The month experiences significant precipitation totaling 74 mm (2.9 in) over approximately 7 days, resulting in a humidity level of 74%. In contrast, December brings much colder conditions, with temperatures dropping significantly to a minimum of -10°C (14°F) and peaking at only 14°C (57°F), averaging around 2°C (35°F). The precipitation decreases to 20 mm (0.8 in) across just 4 days, and humidity slightly declines to 69%. For more detailed information, you can check Longquan weather in December.

Compare Longquan's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Longquan

As September arrives in Longquan, the weather showcases a delightful transition from the warmth of summer to the crispness of autumn. With average temperatures hovering around 22°C (72°F), the month offers a refreshing reprieve from the high heat, yet still allows for occasional warm days, peaking at a maximum of 31°C (88°F). While rainfall is moderate, with 74 mm over about a week, it’s a far cry from the more torrential downpours of the rainy season. Moreover, the humidity at 74% contributes to a mild, yet comfortably pleasant atmosphere, creating ideal conditions for outdoor exploration. For those intrigued by Longquan's weather patterns, further insights can be found at Longquan Climate.