Last updated: August 21, 2025
In September, Hongqiao, China, experiences a dynamic climate characterized by a maximum temperature reaching 38°C (100°F) and an average that hovers around 27°C (81°F). While the warmth prevails, nights can cool down to a refreshing 17°C (62°F). This month also sees about 85 mm (3.4 in) of precipitation spread over 9 days, contributing to a humidity level of 72%. This combination of heat and moisture creates a vibrant atmosphere, making September a unique time to experience the region's transitional weather.
In September, Hongqiao begins to transition from the peak of summer to the cooler embrace of autumn. With minimum temperatures around 17°C (62°F) and an average of 27°C (81°F), the weather remains comfortably warm, perfect for outdoor activities. As the month progresses, daily highs can still reach up to 38°C (100°F), reflecting the lingering heat of summer. This blend of warmth and the first hints of fall creates a unique atmosphere, making September an inviting time to visit and experience the vibrant changes in the landscape. Overall, the temperatures signal a gradual but noticeable shift, paving the way for the refreshing cooler days of October.
In September, Hongqiao experiences a gentle shift in precipitation, receiving 85 mm (or 3.4 inches) of rain over 9 days. This marks a significant decrease from the summer months, particularly from June's peak of 306 mm (12.0 in) and July's substantial 209 mm (8.2 in). The trend shows a gradual tapering off of rainfall as the region transitions into the drier months, leading up to October, where precipitation drops further to 48 mm (1.9 in). September’s moderate rainfall not only alleviates the lingering summer heat but also contributes to the overall moisture balance, making it a transitional month before the autumn dryness sets in.
In September, humidity in Hongqiao, China, drops to a more comfortable 72%, marking a significant decrease from the peak levels observed during the sweltering summer months. This decline follows an intense stretch of high humidity that peaks in July at 91% before gradually easing. While August maintains elevated levels at 87%, the shift in September indicates the onset of autumn, bringing relief to residents after months of pervasive moisture. Overall, the trend showcases a gradual transition towards lower humidity as the year progresses into the cooler months, with humidity levels continuing to fluctuate but remaining relatively high compared to other seasons.
In September, Hongqiao experiences a UV Index of 11, falling under the extreme exposure category, and suggesting a burn time of just 10 minutes. This marks a slight decrease from the peak of 12 seen in the summer months, yet remains significantly high, urging residents and visitors to adopt protective measures against harmful UV radiation. Interestingly, as we transition from the intense summer, the UV Index steadily declines through the autumn months, with October bringing it down to 8. It's clear that this seasonal shift emphasizes the importance of vigilance in sun safety, particularly during the summer and early autumn. For more detailed information, explore the full data at Hongqiao UV Index.
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As September unfolds in Hongqiao, the city basks in a generous 275 hours of sunshine, a figure that remains robust yet reflects a slight dip from the peak summer months of July and August, which recorded an impressive 302 and 311 hours, respectively. This transition signals the gradual shift from the intense heat of summer to the more temperate days of autumn. The sunshine hours in September still outshine earlier months, such as June's 238 hours and April's 237 hours, indicating that while summer's brilliance may be waning, the radiance of the outgoing season continues to warm the city. Following this month, October will present a further decrease, yet the memory of September's golden hours adds a lingering warmth to the approach of cooler days.
As summer transitions into fall, September in Hongqiao, China, emerges as one of the sunniest months, boasting a 63% chance of sunny weather. This significant uptick in sunshine contrasts sharply with the preceding months, particularly the summer, where the likelihood of clear skies hovers around 16% to 29%. The sharp increase in September's sunshine offers residents and visitors alike a delightful opportunity to enjoy outdoor activities, making it a prime time to experience the beauty of the region. With autumn approaching, the likelihood of sun declines again into October, but September surely stands out as a beacon of brightness in the annual weather pattern.
In September, Hongqiao, China, enjoys about 12 hours of daylight, heralding the gradual transition from the long summer days of August that bask in an abundance of sunlight. This slight decrease in daylight is part of a consistent seasonal trend, as the long summer months of June through August, each boasting 13 hours of light, begin to yield to the shorter days that follow. The daylight duration gradually diminishes moving into October, where it drops to 11 hours, reflecting the onset of autumn. This rhythmic pattern of daylight not only marks the changing seasons but also invites a slower pace as nature prepares for the cooler months ahead.
As September unfolds in Hongqiao, China, the wind starts to gently whisper through the streets, averaging a calm 1.5 m/s (3 mph). This slight breeze mirrors the trend seen over the summer months, where wind speeds dipped slightly in August before stabilizing. Compared to the earlier part of the year, the winds are notably milder in September, hinting at the transition into autumn. However, this isn't unusual, as the overall yearly pattern suggests a gradual ebb and flow: January to April typically sees consistent yet low speeds, followed by a peak in July. As the seasons change, residents can enjoy this tranquil atmosphere while anticipating the slightly brisker winds that October promises, ramping up to 2.0 m/s (5 mph).
Weather in Hongqiao varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hongqiao, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and often scorching, with average temperatures around 27°C (81°F) and high peaks reaching up to 38°C (100°F). The humidity is relatively high at 72%, and the month experiences about 85 mm (3.4 in) of precipitation over 9 days. In contrast, January brings much cooler temperatures, with averages dropping to around 8°C (47°F) and lows reaching as low as -5°C (24°F). While it is less humid at 65%, January still has its share of precipitation, totaling 67 mm (2.7 in) over 9 days. The stark difference in temperatures highlights the seasonal shift from the heat of September to the chill of January. For more detailed information, you can check Hongqiao weather in January.
In September, the weather is characterized by warm temperatures, with averages around 27°C (81°F) and daily highs reaching up to 38°C (100°F). The month experiences a relatively high humidity level of 72% and encounters about 85 mm (3.4 in) of precipitation over 9 days. In contrast, February brings a much cooler climate, with average temperatures falling to 10°C (50°F), lows dipping to -5°C (24°F), and highs only reaching up to 27°C (80°F). Despite a slightly higher rainfall total of 88 mm (3.5 in) and greater precipitation days at 11, February's humidity remains similar at 71%. For more detailed information about February weather, you can check out Hongqiao weather in February.
When comparing the weather in September and March, it's clear that March is significantly cooler, with average temperatures ranging from a chilly 3°C (37°F) to a comfortable 15°C (59°F), while September boasts much warmer averages from 17°C (62°F) to a scorching peak of 38°C (100°F). Additionally, March experiences higher precipitation levels at 159 mm (6.3 in) across 18 days, compared to September's 85 mm (3.4 in) over 9 days. The increased humidity of 81% in March also contributes to a more damp atmosphere compared to September's 72%. For more detailed insights on March weather, you can visit Hongqiao weather in March.
Comparing the weather in September and April reveals distinct seasonal contrasts. September boasts much warmer temperatures, with averages around 27°C (81°F) and maximums soaring to 38°C (100°F), while April begins cool, with temperatures starting from a minimum of 4°C (39°F) and averaging only 19°C (66°F). In terms of precipitation, April is significantly wetter, receiving 153 mm (6.0 in) over 15 days compared to September's 85 mm (3.4 in) across 9 days. Additionally, humidity levels in April are higher at 86%, compared to September's 72%. For a detailed look, check out Hongqiao weather in April.
In comparing the weather between September and May, we see notable differences in temperature and precipitation. September typically boasts warmer temperatures, with a minimum of 17°C (62°F) and an average high of 27°C (81°F), while May offers cooler conditions with a minimum of 11°C (52°F) and an average high of 23°C (74°F). However, May experiences significantly more rainfall, accumulating 220 mm (8.7 in) over 17 days compared to September's 85 mm (3.4 in) over just 9 days. Furthermore, humidity levels are higher in May at 87%, compared to September's 72%. For more specific details on weather in May, you can check out Hongqiao weather in May.
In comparing the weather of September and June, we see some notable differences. September tends to have higher maximum temperatures, reaching up to 38°C (100°F), while June peaks at 36°C (97°F). Both months have similar minimum temperatures averaging around 17°C (62°F). However, September experiences significantly less precipitation, with only 85 mm (3.4 in) over 9 days, compared to June's substantial 306 mm (12.0 in), which falls over 20 days. Additionally, June has a higher humidity level at 87%, while September's humidity is slightly lower at 72%. For more details on the weather patterns, you can visit Hongqiao weather in June.
When comparing the weather in September and July, several key differences stand out. September tends to be slightly cooler, with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 38°C (100°F), while July enjoys warmer temperatures, with a minimum of 22°C (71°F) and a maximum of 37°C (99°F). However, July experiences significantly more rainfall, accumulating 209 mm (8.2 in) over 15 days compared to September's 85 mm (3.4 in) across 9 days. The humidity levels are also higher in July at 91%, compared to 72% in September. For more detailed insights into July's weather, you can refer to Hongqiao weather in July.
In comparing the weather patterns of September and August, September tends to have slightly milder temperatures, with a minimum of 17°C (62°F) compared to August's warmer minimum of 23°C (74°F). The average temperature in September is 27°C (81°F), which is cooler than August's average of 30°C (86°F). Additionally, maximum temperatures are closely matched; September reaches a high of 38°C (100°F) while August peaks at 39°C (102°F).
While September experiences a total precipitation of 85 mm (3.4 in) over 9 days, August sees higher rainfall at 116 mm (4.5 in) across 10 days, contributing to its higher humidity levels of 87% compared to September’s 72%. For more detailed insights into August's weather, you can refer to Hongqiao weather in August.
September and October exhibit distinct weather patterns, marking the transition from summer to autumn. In September, the temperatures are notably higher, with a minimum of 17°C (62°F) and an average of 27°C (81°F), peaking at 38°C (100°F). The month also experiences more precipitation, totaling 85 mm (3.4 inches) over 9 days, with humidity at 72%. In contrast, October brings cooler temperatures, with a low of 9°C (48°F), an average of 21°C (70°F), and a maximum of 37°C (99°F). Precipitation decreases to 48 mm (1.9 inches) over 8 days, and humidity slightly rises to 74%. For more detailed information, you can check out Hongqiao weather in October.
September weather features a warm temperature range, with minimums around 17°C (62°F) and maximums soaring up to 38°C (100°F). The month averages a comfortable 27°C (81°F) but also brings significant precipitation at 85 mm (3.4 in) over approximately 9 days, and with humidity levels sitting at 72%. In contrast, November experiences a notable drop in temperatures, with minimums dipping to 3°C (37°F) and an average of 15°C (60°F), while the maximums reach only up to 30°C (87°F). Precipitation in November is slightly less, totaling 78 mm (3.1 in) over 10 days, and humidity levels rise to 80%. This shift from the warmth of September to the cooler, wetter November is striking, highlighting the transition into late autumn. For more detailed weather information, you can check Hongqiao weather in November.
September and December present vastly different weather profiles. In September, temperatures range from a mild 17°C (62°F) at night to a scorching 38°C (100°F) during the day, with an average temperature of 27°C (81°F). The month experiences considerable rainfall, with 85 mm (3.4 in) of precipitation over about 9 days, alongside high humidity levels of 72%.
In contrast, December sees much cooler temperatures, with a minimum of -2°C (28°F), an average of 10°C (50°F), and a maximum of 26°C (79°F). Precipitation decreases to 53 mm (2.1 in) over 10 days, and humidity rises slightly to 78%. For more details on the weather conditions during this month, you can visit Hongqiao weather in December.
As summer transitions into autumn, September in Hongqiao brings a refreshing change to the weather, marked by a pleasant average temperature of 27°C (81°F) that stands apart from the sweltering highs of the preceding months. Although the maximum temperature can still reach a scorching 38°C (100°F), the month features more tolerable evenings, dipping to a mild 17°C (62°F). With about 85 mm (3.4 in) of rainfall over approximately 9 days, humidity levels hover around 72%, adding a touch of tropical feel. This blend of warmth and moisture distinguishes September as a uniquely comfortable time for residents and visitors alike. For further insights on the seasonal patterns, explore our detailed overview at Hongqiao Climate.