Last updated: August 21, 2025
In Baiyun, China, September weather showcases a dramatic blend of temperatures and atmospheric conditions. Average highs reach a pleasant 27°C (81°F), while cool nights can drop to around -3°C (27°F), resulting in an average temperature of 13°C (55°F). This month experiences significant moisture, with 104 mm (4.1 in) of rain falling over 11 days, contributing to a high humidity level of 86%. Such climatic characteristics not only shape the landscape but also offer a unique experience for residents and visitors alike.
In September, Baiyun begins to transition from the sweltering summer heat to the cooler autumn air, showcasing a notable shift in temperatures. With a minimum of -3°C (27°F) and an average temperature of 13°C (55°F), the month offers a refreshing break from the peak summer warmth. The maximum reaches a comfortable 27°C (81°F), making it an ideal time for outdoor activities and enjoying the scenic landscapes. This gradual cooling trend hints at the approaching winter months, yet September still retains vestiges of warmth, inviting residents and visitors alike to bask in the last of the season's mildness.
September in Baiyun, China marks a significant shift as the monsoon season begins to decrease, yet it still delivers a substantial 104 mm (4.1 in) of rainfall over approximately 11 days. This ample precipitation, while lower than the peak months of July and August, reflects a gradual transition towards drier conditions in the upcoming fall. The moisture accumulated during September contributes to the lush landscape that characterizes the region, as summer's heavy rains taper off and prepare the soil for the cooler months ahead. This pattern underscores the overall trend of fluctuating rainfall, with spring and summer months generally experiencing a surge, highlighting the distinct seasonal variability in Baiyun’s climate.
In Baiyun, China, September experiences a relative humidity of 86%, marking a slight decrease from the 88% in August but still indicating a persistently humid atmosphere typical of late summer. This trend is consistent with the rising humidity levels observed from January through July, where values peak at 87% during the sweltering summer months. Following September, humidity begins to gradually decline into October at 83%, signaling the transition into the drier autumn season. Overall, while September remains comfortably humid, it showcases a subtle shift towards more balanced and moderate conditions as the year progresses.
As summer fades into autumn in Baiyun, China, the UV Index experiences a notable decline. September’s UV Index registers at 6, categorized as high, allowing for a burn time of 25 minutes. This marks a shift from the peak levels of July and August, which saw very high readings of 9 and 8, respectively—with significantly shorter burn times of just 15 minutes. Overall, the trend indicates a gradual reduction in UV intensity as the year progresses, creating a more manageable outdoor experience for residents and visitors alike. As the sun begins its descent towards winter, awareness of UV exposure remains essential. For more detailed information on UV levels throughout the year, visit Baiyun UV Index.
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In Baiyun, China, September brings a delightful transition as the summer fades, with the region enjoying 270 hours of sunshine. While this marks a slight dip from the sun-drenched heights of July, which boasts 349 hours, it still showcases a robust month of daylight. The trend shows that from January's modest 184 hours, sunshine steadily increases, peaking in May. However, as autumn sets in, the hours gradually decrease once more, signaling a shift in the seasons. This pattern emphasizes a rich tapestry of light that characterizes Baiyun's yearly rhythm, making September a perfect backdrop for those savoring the lingering warmth before the cooler months.
In Baiyun, China, September offers a 39% chance of sunny weather, a slight dip compared to the earlier months of the year. While April and January boast the highest probabilities of sunshine at 54%, the summer months struggle with significantly lower chances, peaking in July with just 25%. This downward trend in sunshine probability during the sweltering mid-summer months continues into September, indicating that while the sun may not be at its best, the weather remains relatively mild, paving the way for a transition into more consistently sunny October, where the chance of sunshine rises to an impressive 66%. Overall, September serves as a gentle prelude to the sun-drenched days ahead.
As the seasons transition, September in Baiyun, China, offers a delightful balance of daylight, providing about 12 hours of sunlight. Following the summer months, which peak with an impressive 16 hours in June, the daylight begins to gracefully wane. July and August feature a gradual decline, highlighting nature's shift towards shorter days. Yet, September retains some of the last remnants of summer's brightness before it settles into the cozy embrace of autumn, with daylight decreasing further in October to 10 hours. This gradual reduction creates a gentle rhythm, allowing residents to savor the lingering warmth of summer while preparing for the cooler months ahead.
As September rolls into Baiyun, China, the average wind speed settles at 2.6 m/s (6 mph), mirroring the calmness of the preceding months. This gentle breeze offers a tranquil backdrop as summer softly transitions to autumn, following the slight uptick in wind speeds during the spring, where April reached a peak of 4.0 m/s (9 mph). Interestingly, September's winds join the ranks with the more serene summer months of July and August, both also recording 2.7 m/s (6 mph). This pattern suggests a seasonal ebb and flow, with lighter winds characterizing late summer and early autumn, inviting a moment of respite before winds begin to pick up again in October.
Weather in Baiyun varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Baiyun, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a chilly -3°C (27°F) at night to a warm 27°C (81°F) during the day, with an average of 13°C (55°F). This month experiences relatively high precipitation, totaling 104 mm (4.1 in) over 11 days, accompanied by a humidity level of 86%. In stark contrast, January is characterized by frigid temperatures, with lows plummeting to -41°C (-42°F) and an average of -22°C (-7°F), while highs reach only -7°C (20°F). Precipitation in January is minimal, at just 4 mm (0.2 in) over only one day, and humidity remains slightly higher at 87%. For more details on weather in January, you can visit Baiyun weather in January.
In comparing the weather between September and February, notable differences emerge. September experiences a much milder temperature range, with minimums around -3°C (27°F), averaging 13°C (55°F), and reaching highs of 27°C (81°F). This month sees significant precipitation, totaling 104 mm (4.1 in) over approximately 11 days, all while maintaining a high humidity level of 86%. In stark contrast, February offers a frigid climate, with temperatures plummeting to a chilling minimum of -38°C (-36°F) and an average of -17°C (1°F), peaking at just 5°C (42°F). February is marked by minimal precipitation, with only 5 mm (0.2 in) over just one day, yet the humidity remains consistent at 86%. For more insights into February weather, you can visit Baiyun weather in February.
In comparing the weather between September and March, we can see a stark contrast. September experiences a mild range, with temperatures fluctuating from a chilly -3°C (27°F) at night to a warm high of 27°C (81°F) during the day, coupled with significant precipitation of 104 mm (4.1 in) over 11 days and high humidity at 86%. Conversely, March is much colder, with minimum temperatures plummeting to -29°C (-19°F) and a maximum of just 15°C (59°F). This month sees minimal precipitation of only 12 mm (0.5 in) over just 3 days and slightly lower humidity at 79%. For more detailed insights, you can visit Baiyun weather in March.
In comparing September and April weather, significant differences emerge in both temperature and precipitation. September typically features a more moderate temperature range with a minimum of -3°C (27°F), an average of 13°C (55°F), and a maximum of 27°C (81°F), accompanied by higher humidity at 86% and 104 mm (4.1 in) of precipitation spread over 11 days. In contrast, April experiences colder temperatures, with a minimum of -17°C (2°F) and an average of only 4°C (40°F), though it can still reach a maximum of 26°C (80°F). Precipitation is much lighter in April, totaling just 25 mm (1.0 in) over 4 days, and the humidity is lower at 66%. For more detailed weather insights, you can visit Baiyun weather in April.
September and May exhibit distinct weather patterns, showcasing the transition between seasons. In September, temperatures range from a brisk minimum of -3°C (27°F) at night to a warm maximum of 27°C (81°F) during the day, with an average temperature of 13°C (55°F). The month experiences higher humidity at 86% and more precipitation, totaling 104 mm (4.1 in) over approximately 11 days. In contrast, May features a similar minimum temperature of -3°C (28°F) but boasts a higher maximum of 31°C (88°F) and a slightly lower average of 12°C (54°F). It has less rainfall, with 54 mm (2.1 in) over 9 days, and the humidity is significantly lower at 69%. For more detailed information, you can check Baiyun weather in May.
In comparing the weather between September and June, several notable differences emerge. September typically experiences milder temperatures, with minimums dropping to -3°C (27°F) and averages around 13°C (55°F), while June boasts warmer conditions, with minimums at 4°C (39°F) and an average of 17°C (63°F). The maximum temperatures in June can reach up to 34°C (93°F), significantly higher than September's peak of 27°C (81°F). Precipitation levels also vary, with June receiving 141 mm (5.6 in) over 14 days compared to September's 104 mm (4.1 in) over 11 days, contributing to a slightly higher humidity level in September at 86%, compared to June's 80%. For a detailed look at June specifics, you can visit Baiyun weather in June.
In comparing the weather patterns of September and July, notable differences emerge in temperature and precipitation. September experiences a broader temperature range, with lows reaching -3°C (27°F) and highs peaking at 27°C (81°F), while the average sits around a cooler 13°C (55°F). In contrast, July boasts milder minimum temperatures of 10°C (51°F) and averages 21°C (71°F), with a maximum of 33°C (92°F). Precipitation also varies significantly: September receives about 104 mm (4.1 in) over 11 days, whereas July experiences higher rainfall at 175 mm (6.9 in) over 17 days, making it the wetter month. Both months have similar humidity levels, remaining high at around 86-87%. These variations highlight the transition from the warmth of summer in July to the cooler, wetter conditions of September. For more details on July's climate, check out Baiyun weather in July.
September weather displays a noticeable shift from August, characterized by cooler temperatures and slightly less rainfall. The average temperature in September is around 13°C (55°F), with a minimum of -3°C (27°F) and a maximum reaching 27°C (81°F), compared to August's warmer average of 18°C (65°F), ranging from a minimum of 4°C (40°F) to a maximum of 28°C (83°F). While September experiences 104 mm (4.1 in) of precipitation over 11 days, August sees a significantly higher 191 mm (7.5 in) over 18 days. Furthermore, humidity levels remain relatively high in both months at 86% for September and 88% for August, indicating a consistently moist atmosphere. For more detailed information, you can check Baiyun weather in August.
September and October exhibit distinct contrasts in weather patterns. In September, temperatures range from a minimum of -3°C (27°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F). The month sees considerable precipitation, totaling 104 mm (4.1 in) over 11 days, accompanied by high humidity at 86%.
In contrast, October experiences a noticeable drop in temperatures, with lows plunging to -14°C (7°F), while the maximum stays at a milder 23°C (74°F), resulting in a cooler average of 3°C (38°F). Additionally, October is drier, receiving only 35 mm (1.4 in) of precipitation over 6 days and slightly less humidity at 83%. For a closer look at the specific conditions in Baiyun during October, visit Baiyun weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a chilly -3°C (27°F) to a warm 27°C (81°F), with an average of 13°C (55°F). This month witnesses considerable rainfall, totaling 104 mm (4.1 in) over 11 days, accompanied by high humidity levels at 86%. In contrast, November sees a significant drop in temperatures, with minimums plunging to -26°C (-15°F) and an average of -9°C (16°F), peaking at a mere 11°C (52°F). Precipitation is minimal, accumulating to only 17 mm (0.7 in) over 5 days, and humidity decreases to 72%. The transition from September to November marks a shift from mild, wet conditions to harsh, dry cold. For more details, check out Baiyun weather in November.
September's weather presents a striking contrast to that of December, with temperatures ranging from a chilly -3°C (27°F) at night to a warm 27°C (81°F) during the day, resulting in an average temperature of 13°C (55°F). The month is characterized by higher humidity at 86% and notable precipitation of 104 mm (4.1 in) spread over 11 days. In contrast, December plunges into the depths of winter with a minimum temperature of -40°C (-39°F) and a stark maximum of just 1°C (33°F), averaging a frigid -21°C (-5°F). Precipitation drops significantly to only 6 mm (0.2 in) over 1 day, and humidity decreases slightly to 81%. For more details on December weather, visit Baiyun weather in December.
As September unfolds in Baiyun, the weather showcases a transition that stands in contrast to the hotter summer months. With average temperatures dipping significantly and a more comfortable average humidity, the region begins to shed the sweltering heat, inviting a refreshing coolness that is often welcomed after the peak summer. September also brings more frequent rainfall, contributing to the lush landscapes that characterize this time of year. This blend of mild temperatures and increased moisture sets the stage for a vibrant autumn, making it an ideal month for exploration and appreciation of nature. For more detailed insights into Baiyun's climate throughout the year, visit Baiyun Climate.