September Weather in Dongguan, China

Last updated: August 21, 2025

September in Dongguan, China is characterized by warm temperatures and significant rainfall. With maximum temperatures reaching 36°C (97°F) and an average of 29°C (84°F), the month is hot and humid, boasting a minimum temperature of 21°C (70°F). Rainfall is abundant, with 183 mm (7.2 in) expected over 21 days, resulting in 75% humidity that can make the air feel quite muggy. As the summer heat lingers, visitors and residents alike should prepare for both the sunshine and the showers that define this vibrant month.

September Temperature in Dongguan

In September, Dongguan, China, experiences a warm transition that signals the end of summer. With minimum temperatures around 21°C (70°F), the city maintains a pleasant warmth, while the average hovers at a cozy 29°C (84°F). The maximum temperatures can soar up to 36°C (97°F), reflecting the lingering heat of the summer months. As the humidity begins to decrease, September creates an inviting atmosphere for outdoor activities and festivals, making it a delightful time to explore the vibrant local culture. The overall trend during this month reveals a gradual decline in temperatures as the region gently shifts into the milder weather of autumn.

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

The chart illustrates September temperature patterns in Dongguan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dongguan, 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).
JanFebMarAprMayJunJulAugSepOctNovDec626370748084858483777163
Data source: Temperature data for Dongguan 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 Dongguan

In September, Dongguan experiences significant rainfall, with 183 mm (7.2 in) accumulated over 21 days. This trend continues the pattern set by the preceding summer months, highlighting a seamless transition from the wet season characterized by high precipitation in June (413 mm) and August (318 mm). As the rainfall begins to taper off in October with just over 90 mm (3.6 in) anticipated, September serves as a crucial month for replenishing local water sources before entering the drier season. The volume of rain, while substantial, is noticeably less than the peak summer months, suggesting a gradual shift in weather patterns. Overall, September stands out not only for its quantity of rain but also for maintaining a steady rhythm in the region's climatic cycle.

September Precipitation Trends in Dongguan

The chart displays monthly precipitation patterns in Dongguan, 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 Dongguan, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec235193132228413202318183912320
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dongguan

In Dongguan, China, September marks a notable shift in humidity levels as the summer heat begins to wane. With an average humidity of 75%, this month shows a decrease from the 88% highs of July and August, signaling a gradual transition into the drier autumn months. It’s interesting to observe how humidity peaked in the summer, with values climbing steadily from 64% in January to the summer's peak, before gently tapering off in September. This pattern suggests a distinct seasonal rhythm in Dongguan’s climate, where the oppressive summertime mugginess gives way to a more comfortable air as the year progresses towards October and November, which see humidity levels drop to 65% and 64%, respectively.

September Average Humidity in Dongguan

This chart illustrates the average monthly humidity levels in Dongguan, 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 Dongguan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec64%68%73%71%79%77%88%88%75%65%64%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Dongguan

As September rolls into Dongguan, China, the UV Index remains a formidable 12, categorizing this month as extreme with a burn time of just 10 minutes. Mirroring the trend of the preceding summer months, which consistently showcased a dip into the extreme category, September signifies a slight reprieve from the peak UV levels of May through August. However, residents should remain vigilant as the sun's intensity can still pose a significant risk. As we transition into autumn, the UV Index will gradually decrease, leading to October’s expected levels of 10, but for now, it’s essential to stay sun-safe. For more insights, check out the detailed Dongguan UV Index.

Maximum UV Index Levels in Dongguan for September

The chart shows the monthly maximum UV Index (UVI) for Dongguan 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 Dongguan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121213131313121097
Data source: Dongguan 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 Dongguan

As September arrives in Dongguan, China, the days are still bathed in an impressive 272 hours of sunshine, matching the vibrant warmth of August. This consistent solar glow contributes to the city's yearly peak, which occurs in the sultry heights of July, where residents enjoy a remarkable 302 hours. Following the summer months, September maintains a notable brightness, hinting at the lingering embrace of summer before the gradual shift to autumn. Notably, the hours of sunshine begin to taper off in October with 267 hours, suggesting a gentle transition as the year progresses. Overall, September stands out as a fitting companion to the sun-drenched summer, ensuring that the spirit of summer lingers just a little longer in Dongguan.

Monthly Sunshine Duration in Dongguan: September Highlighted

The September sunshine duration represents the total number of hours Dongguan 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.
JanFebMarAprMayJunJulAugSepOctNovDec197h220h219h214h272h250h302h272h272h267h243h251h
Data source: Dongguan September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Dongguan During September

In Dongguan, China, the month of September offers a reasonable 41% chance of sunny weather, making it one of the more favorable months for sunshine as the summer heat begins to wane. This statistic reflects a noticeable increase compared to the much sunnier winter months, where January and November enjoy higher probabilities of clear skies at 62% and 60%, respectively. Notably, September stands out as a transitional period; it surpasses the lackluster sunshine of the preceding summer months, such as June and August, which plunge to a mere 10% and 14% chance, respectively. As autumn approaches, the likelihood of enjoying sunny days begins to stabilize, providing a pleasant reprieve from the oppressive summer humidity. Overall, September welcomes a more balanced weather pattern, offering a charming opportunity to explore the vibrant surroundings under clearer skies.

Percentage of Sunny Days in September in Dongguan

The chart illustrates the percentage of sunny days in Dongguan 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 Dongguan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec62%59%33%32%25%10%31%14%41%36%60%51%
Data source: Dongguan September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Dongguan in September

In September, Dongguan, China enjoys a delightful 12 hours of daylight, marking a continuation of the summer's brightness before gradually transitioning into autumn. Notably, the daylight duration begins to level off after a peak in May through July, where the city basked in a full 13 hours of sunshine. This consistent light in September, akin to the previous months of April and August, sets a harmonious tone as days start to shorten towards October. The subtle shift in daylight hints at the upcoming cooler months, while still allowing residents ample time to savor the warm early autumn sun.

Average Daylight Hours in Dongguan for September

The chart illustrates the variation in daylight duration in Dongguan throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 52m11h 22m12h 1m12h 40m13h 14m13h 30m13h 22m12h 53m12h 15m11h 35m11h 1m10h 44m
Data source: Dongguan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Dongguan

As September unfolds in Dongguan, China, the air becomes remarkably still, with an average wind speed of just 1.5 m/s (3 mph). This subtle shift marks a transition from the slightly breezier summer months, where average speeds hovered around 1.9 to 2.7 m/s. The decline in wind as autumn approaches creates a tranquil atmosphere, inviting reflection and a sense of serenity. In contrast, the tail end of the year brings a resurgence of breezy days, especially in October, which boasts a notable increase to 3.1 m/s (7 mph). This emerging trend signifies nature’s rhythmic patterns, as the winds ebb and flow with the changing seasons, shaping the unique weather tapestry of Dongguan.

Average September Wind Speed in Dongguan

The chart displays monthly wind speed patterns in Dongguan, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.62.22.62.32.72.52.11.91.5 m/s3.12.52.6
Data source: Dongguan September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Dongguan Compares to Other Months

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

September and January showcase contrasting weather patterns, with September characterized by warm temperatures and high humidity. In September, temperatures range from a minimum of 21°C (70°F) to a maximum of 36°C (97°F), accompanied by significant rainfall of 183 mm (7.2 in) over 21 days, resulting in a humidity level of 75%. In stark contrast, January experiences much cooler conditions, with temperatures ranging from a chilly 3°C (38°F) to a milder 28°C (82°F), and significantly less rainfall at only 23 mm (0.9 in) over 3 days. This dip in precipitation also leads to lower humidity levels at 64%. For more detailed information on January's weather, visit Dongguan weather in January.

September and February present distinctly different weather profiles. September typically features much warmer temperatures, with a minimum of 21°C (70°F) and an average high reaching 36°C (97°F), compared to the milder February, which has a minimum of 5°C (41°F) and boasts an average high of 30°C (86°F). Additionally, September experiences significantly more rainfall, totaling 183 mm (7.2 in) over 21 days, while February sees only 51 mm (2.0 in) of precipitation over just 7 days. Another notable difference is the humidity; September's average humidity stands at 75%, creating a more tropical feel, whereas February's humidity is slightly lower at 68%. For more detailed information about February weather, visit Dongguan weather in February.

In September, the weather is typically hot and humid, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 36°C (97°F) and an average of 29°C (84°F). This month also sees significant rainfall, with 183 mm (7.2 in) of precipitation over 21 days, contributing to a humidity level of 75%. In contrast, March offers a much milder climate, with temperatures varying from a low of 9°C (49°F) to a high of 31°C (87°F), resulting in a comfortable average of 21°C (70°F). The precipitation in March is also considerably lower at 93 mm (3.7 in) over 13 days, with humidity slightly less at 73%. For more insights on the weather, you can check Dongguan weather in March.

In September, the weather is significantly warmer compared to April, with average temperatures reaching 29°C (84°F) and highs of up to 36°C (97°F). The month is also characterized by high humidity levels at 75% and increased rainfall, averaging 183 mm (7.2 in) over 21 days. In contrast, April offers a milder climate, with average temperatures around 23°C (74°F) and maximums of 33°C (92°F). The precipitation is lower in April at 132 mm (5.2 in) across 13 days, and the humidity is slightly less at 71%. For a more detailed look at weather conditions during this month, you can check Dongguan weather in April.

In comparing the weather of September and May, it’s clear that both months experience warm temperatures, with maximums reaching similar peaks of around 36°C (97°F in September and 96°F in May). However, September tends to have a higher average temperature of 29°C (84°F) compared to May's 27°C (81°F). Precipitation levels are also notable; May receives slightly more rain at 228 mm (9.0 in) over 22 days, while September has 183 mm (7.2 in) over 21 days. Humidity is comparably high in both months, with September at 75% and May a touch higher at 79%. For more detailed insights, you can check Dongguan weather in May.

September and June display similar average temperatures, both hovering around 29°C (84°F). However, September typically experiences a slightly lower temperature range, with a minimum of 21°C (70°F) compared to June's minimum of 24°C (75°F). In terms of precipitation, June is significantly wetter, receiving 413 mm (16.3 in) over 26 days—almost double the 183 mm (7.2 in) in September, which sees rainfall across 21 days. Humidity levels are quite close, with June at 77% and September at 75%. This makes September noticeably drier, offering a more comfortable feel despite the heat. For more information about June weather specifics, check Dongguan weather in June.

When comparing the weather in September and July, we see that September offers slightly cooler temperatures, with a minimum of 21°C (70°F) and an average of 29°C (84°F), while July typically has a minimum of 25°C (77°F) and an average of 30°C (86°F). Although July reaches a higher maximum temperature of 37°C (99°F) compared to September's 36°C (97°F), it also has higher humidity at 88% versus September's 75%. Precipitation is a notable factor as well, with September experiencing 183 mm (7.2 in) of rain over 21 days, while July has a bit more rainfall at 202 mm (8.0 in) over 24 days. For further details, you can check Dongguan weather in July.

September weather shows a slight decrease in both minimum and maximum temperatures compared to August, with September's minimum at 21°C (70°F) and maximum at 36°C (97°F), while August's temperatures ranged from 24°C (76°F) to a peak of 38°C (100°F). The average temperature remains relatively stable, around 29°C (84°F) in September and 29°C (85°F) in August. However, September experiences considerable rainfall, totaling 183 mm (7.2 in) over 21 days, which is significantly less than August's 318 mm (12.5 in) over 26 days. Humidity is also lower in September at 75%, compared to August's higher level of 88%. For more details on August weather, visit Dongguan weather in August.

September and October display notable differences in weather patterns. September typically experiences warmer temperatures, with nightly lows around 21°C (70°F) and daytime highs reaching up to 36°C (97°F). In contrast, October sees cooler conditions, with minimum temperatures dropping to 16°C (61°F) and an average high of 35°C (95°F). Precipitation also significantly decreases from September’s 183 mm (7.2 in) over 21 days to just 91 mm (3.6 in) across only 8 days in October, making it a drier month. Additionally, humidity levels are lower in October at 65%, compared to September's 75%. For more detailed information on October weather, check out Dongguan weather in October.

September and November present a striking contrast in weather conditions. In September, temperatures are notably higher, with a minimum of 21°C (70°F) and an average of 29°C (84°F), peaking at 36°C (97°F). This month also sees significant rainfall, with 183 mm (7.2 in) of precipitation over 21 days, contributing to a high humidity level of 75%. In contrast, November experiences much cooler temperatures, with a minimum of 12°C (55°F) and an average of 22°C (71°F), reaching a maximum of 31°C (88°F). Additionally, November is much drier, with only 23 mm (0.9 in) of precipitation over just 4 days and a reduced humidity of 64%. For more specific details, you can check Dongguan weather in November.

September and December exhibit contrasting weather patterns. In September, temperatures range from a warm minimum of 21°C (70°F) to a scorching maximum of 36°C (97°F), with an average temperature of 29°C (84°F). The month is quite humid, with 75% humidity and significant rainfall of 183 mm (7.2 in) over 21 days. In contrast, December brings cooler conditions, with temperatures dropping to a minimum of 7°C (45°F) and peaking at 29°C (85°F), averaging 17°C (63°F). The month is much drier, with only 20 mm (0.8 in) of precipitation occurring over just 3 days and a slightly lower humidity of 69%. For more detailed information, check out Dongguan weather in December.

Compare Dongguan's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Dongguan

As summer gives way to autumn, September in Dongguan brings a noticeable transition in weather, characterized by a blend of warmth and humidity. Temperatures remain high, yet the oppressive heat begins to wane, making the average conditions more bearable than in the peak summer months. However, with 21 days of rainfall and a significant overall precipitation amount, this month stands out as one of the wettest of the year. The humidity levels also remain elevated, contributing to a noticeable stickiness in the air that is more prevalent than in the drier months that follow. For those looking to understand the broader patterns, more detailed insights can be found at Dongguan Climate.