Last updated: August 21, 2025
In September, Jiucaigou, China, experiences a mild climate characterized by maximum temperatures reaching 30°C (86°F) and an average of 18°C (65°F). The month can start with cooler nights, dipping to a minimum of 3°C (37°F). With 8 days of rainfall contributing to a total of 92 mm (3.6 in) of precipitation, the humidity level is notably high at 75%, creating a lush and vibrant atmosphere. This blend of warm days and cool nights, paired with frequent showers, makes September a captivating time to explore the natural beauty of Jiucaigou.
In September, Jiucaigou transitions from the sweltering summer heat to a more temperate climate, making it an ideal time for outdoor adventures. With nighttime temperatures dipping to a refreshing 3°C (37°F), and daytime highs reaching a comfortable 30°C (86°F), this month offers a pleasant average temperature of 18°C (65°F). This marked decline in temperatures from the scorching heights of August highlights the onset of autumn, inviting visitors to enjoy the stunning natural landscapes adorned in fall colors. As the days gradually shorten and the air grows crisp, September presents a perfect opportunity to experience Jiucaigou's rich scenery before winter arrives.
In September, Jiucaigou experiences a notable shift in precipitation patterns, receiving 92 mm (3.6 in) of rain over approximately 8 days. This aligns with the tail end of the monsoon season, showcasing a significant decrease from August's peak of 240 mm (9.4 in) while still maintaining substantial moisture. The transition to autumn brings a more moderate but consistent rainfall, preparing the landscape for the upcoming drier months. As the year progresses, the precipitation trends highlight a clear seasonal rhythm, with September serving as a bridge from the lush, rainy summer to the cooler, drier days of fall.
September in Jiucaigou, China, marks a subtle transition in humidity as it begins to retreat from the peak summer levels. With an average humidity of 75%, September is lower than the sweltering 86% experienced in August but still retains a noticeable moisture that characterizes the late summer and early autumn months. The humidity dips slightly from the summer's high, aligning with a trend observed throughout the year where the humidity typically rises in the warmer months and decreases as winter approaches. This change in September hints at the onset of the cooler season, setting the stage for the refreshing, crisp air that comes with October's 80% humidity.
As September rolls into Jiucaigou, China, residents and visitors experience a UV Index of 8, indicating a very high exposure level. This trend is consistent with the preceding summer months, which saw similar readings of 8 in May and August, and a peak of 11 in July. With a burn time of just 15 minutes, caution is definitely warranted, continuing the pattern of increased UV exposure that began in late spring. As the season shifts, October promises a slight reprieve with a reduced UV Index of 6, yet it’s clear that September still demands attention to sun safety practices. For those keen on understanding more about UV risks throughout the year, detailed information can be found here: Jiucaigou UV Index.
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In Jiucaigou, China, September marks a delightful transition as the summer sun begins to wane, bringing an inviting blend of warmth and crispness. With 283 hours of sunshine, this month continues the trend of high sunlight that characterizes the summer, peaking in July with 318 hours. However, September experiences a gentle decline in daylight hours, a precursor to the cooler days ahead. Following the vibrant summer months, the sunshine in September remains significantly higher than the winter months, such as January with only 201 hours. This gradual shift not only enhances the region's natural beauty but also invites travelers to bask in the lingering warmth before autumn fully takes hold, making it a perfect time for exploration and outdoor activities amidst the picturesque landscapes.
In Jiucaigou, China, September sees a 36% chance of sunny weather, marking a slight uptick from the summer months but remaining on the lower end of the spectrum compared to earlier and later months. The transition into fall brings a noticeable decline in sunshine, as July and August dip significantly to 21% and 39%, respectively. As the region shifts toward October, the likelihood of sunshine notably rises to 57%, suggesting that while September may be less favorable for sun-seekers, brighter days are just around the corner. This gradual increase in sun chances highlights the distinct seasonal changes that Jiucaigou experiences, making it a captivating destination for autumnal exploration.
In September, Jiucaigou experiences a daylight duration of 12 hours, marking a gentle transition from the long summer days of June and July, which boast 15 and 14 hours of sunlight, respectively. As the days shorten leading into autumn, September serves as a bridge, retaining a generous amount of daylight compared to the preceding months. This reduction is gradual; it follows the peak of 15 hours in June, tapering down through 14 hours in July and 13 hours in August. As nature prepares for the approaching winter, September offers a harmonious balance, allowing residents and visitors alike to enjoy the fading light before the hours dwindle further into October and beyond.
As September rolls into Jiucaigou, the winds begin to whisper a gentle transition, with an average speed of 2.3 m/s (5 mph). This marks a slight uptick from the sun-drenched days of summer, where wind speeds dipped to 2.1 m/s (5 mph) in August. This month stands out in a yearly pattern characterized by the fluctuating rhythms of nature. Generally, the winds are at their strongest during the winter months, with speeds reaching up to 3.3 m/s (7 mph) in both February and April. In contrast, the summer months tend to offer milder breezes, creating a serene atmosphere perfect for those looking to enjoy the breathtaking landscapes of Jiucaigou. As autumn begins to set in, the gradual shift in wind speed hints at the approaching cooler days, inviting visitors to experience the mesmerizing beauty of this pristine region.
Weather in Jiucaigou varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jiucaigou, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is marked by a mild average temperature of 18°C (65°F), with highs reaching up to 30°C (86°F) and lows around 3°C (37°F). The month experiences significant rainfall, averaging 92 mm (3.6 in) over about 8 days, contributing to a relatively high humidity of 75%. In contrast, January is characterized by a stark drop in temperatures, with an average of -9°C (17°F), ranging from a frigid minimum of -23°C (-10°F) to a maximum of 7°C (46°F). Precipitation is minimal during this month, totaling only 6 mm (0.2 in) over just 2 days and accompanied by lower humidity levels at 58%. For a deeper look at January conditions, you can check Jiucaigou weather in January.
The weather in September is significantly warmer and more humid compared to February. In September, temperatures range from a minimum of 3°C (37°F) to a comfortable average of 18°C (65°F), with highs reaching 30°C (86°F). This month experiences about 92 mm of precipitation over 8 days, coupled with a humidity level of 75%. In contrast, February is much colder, with temperatures dipping as low as -20°C (-3°F) and averaging around -5°C (23°F), peaking at 13°C (55°F). The month is much drier, receiving only 13 mm of precipitation across just 2 days and with a lower humidity of 52%. For more specific information, you can check the Jiucaigou weather in February.
In September, temperatures range significantly, with a minimum of 3°C (37°F) and a maximum of 30°C (86°F), giving an average of around 18°C (65°F). The month is marked by higher humidity at 75% and more rainfall, totaling 92 mm (3.6 in) over about 8 days. In contrast, March experiences much colder weather, with minimum temperatures plummeting to -14°C (7°F) and a maximum of 19°C (66°F), averaging just 3°C (38°F). Precipitation in March is significantly lower at 19 mm (0.7 in) over 5 days, and the humidity is also reduced to 53%. For more detailed information about March weather in Jiucaigou, you can visit Jiucaigou weather in March.
September and April offer contrasting weather experiences. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 30°C (86°F), with an average of 18°C (65°F) and higher humidity at 75%. The month also sees more rainfall, with about 92 mm (3.6 in) of precipitation over approximately 8 days. In contrast, April features cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 27°C (80°F), averaging 10°C (50°F). Precipitation is lighter, totaling around 36 mm (1.4 in) over 6 days, and humidity is lower at 59%. For more specific details about April weather, you can refer to Jiucaigou weather in April.
In comparing the weather between September and May, September tends to be warmer overall, with average temperatures reaching 18°C (65°F) compared to May's 15°C (60°F). Both months experience similar levels of precipitation, with September receiving 92 mm (3.6 in) over 8 days, while May has slightly less at 83 mm (3.3 in) also over 8 days. Furthermore, September's humidity is higher at 75%, compared to May's 70%. As a result, while both months are relatively mild, September is characterized by warmer temperatures and slightly more humid conditions. For a more detailed look at the weather specifics in May, you can check out Jiucaigou weather in May.
In comparing the weather of September and June, we find some notable differences in temperature and humidity. September experiences cooler temperatures, with a minimum of 3°C (37°F) and an average of 18°C (65°F), while June has milder conditions, starting at a minimum of 9°C (49°F) and reaching an average of 20°C (68°F). Additionally, June sees slightly higher maximum temperatures, peaking at 33°C (91°F) compared to September's 30°C (86°F). Precipitation levels are fairly similar, with September receiving 92 mm (3.6 in) over 8 days, while June has 83 mm (3.3 in) spread over 9 days. Humidity levels are also slightly higher in June at 79% compared to September's 75%. For more detailed insights, you can check Jiucaigou weather in June.
September and July offer contrasting weather experiences. In September, temperatures range from a cool minimum of 3°C (37°F) to a pleasant maximum of 30°C (86°F), with an average of 18°C (65°F). The month sees about 92 mm (3.6 in) of precipitation over 8 days, accompanied by a humidity level of 75%. In contrast, July is warmer, with temperatures starting at a minimum of 14°C (58°F) and reaching up to 35°C (95°F), averaging around 24°C (76°F). It experiences more rainfall, with 115 mm (4.5 in) spread across 13 days and a higher humidity of 85%. For more details on July weather, you can check Jiucaigou weather in July. Overall, September is cooler and drier, while July provides a warmer and more humid climate.
In comparing the weather of September and August, September brings cooler temperatures, with a minimum of 3°C (37°F) and an average of 18°C (65°F), while August tends to be warmer, featuring a minimum of 9°C (48°F) and an average of 23°C (74°F). The maximum temperatures also reflect this trend, soaring up to 36°C (97°F) in August compared to a peak of 30°C (86°F) in September. Rainfall is significantly higher in August, with 240 mm (9.4 in) recorded over 16 days, while September experiences only 92 mm (3.6 in) spread over 8 days. Additionally, humidity levels remain elevated in both months, but are notably higher in August at 86%, compared to September’s 75%. For a closer look at August weather specifics, you can visit Jiucaigou weather in August.
September offers a warmer climate with average temperatures around 18°C (65°F) and highs reaching up to 30°C (86°F), alongside a notable humidity level of 75%. Rainfall is relatively high during this month, with 92 mm (3.6 in) of precipitation occurring over 8 days. In contrast, October ushers in cooler temperatures, with a minimum of -5°C (24°F) and an average of 10°C (50°F), while still maintaining a comfortable maximum of 27°C (80°F). October experiences less precipitation, totaling 58 mm (2.3 in) over just 6 days, and slightly increased humidity at 80%. For more details about October weather specifically, check the following link: Jiucaigou weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a mild 3°C (37°F) at night to a warm 30°C (86°F) during the day, with an average of 18°C (65°F). The month experiences significant rainfall, totaling 92 mm (3.6 in) over approximately 8 days, and humidity remains relatively high at 75%. In contrast, November brings much colder temperatures, with nighttime lows plummeting to -12°C (10°F) and daytime highs reaching a maximum of 19°C (67°F), averaging only 2°C (36°F). Precipitation is reduced to 45 mm (1.8 in) spread over just 4 days, while humidity slightly decreases to 70%. For more detailed information, you can visit Jiucaigou weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 3°C (37°F) to a warm maximum of 30°C (86°F), with an average of 18°C (65°F). The month experiences about 92 mm (3.6 in) of precipitation over approximately 8 days, while humidity levels hover around 75%. In contrast, December plunges into much colder temperatures, ranging from a minimum of -22°C (-7°F) to a maximum of 9°C (48°F), with an average of -6°C (21°F). Precipitation dramatically decreases to just 10 mm (0.4 in) over only 1 day, and humidity falls to 58%. For more specific insights into December weather, you can explore Jiucaigou weather in December.
As September rolls into Jiucaigou, the weather begins to transition from the warmth of summer to the crispness of fall. With average temperatures settling around a comfortable 18°C, it’s a month where outdoor exploration thrives under the lingering sun. However, the increased humidity and a notable rise in precipitation, with rain frequently gracing the region, remind visitors that autumn is on the horizon. This change sets September apart from the drier and hotter summer months, offering a unique blend of warm days and refreshing breezes. If you're curious about the climatic nuances of Jiucaigou, delve deeper into its weather patterns in our Jiucaigou Climate guide.