Last updated: August 21, 2025
In September, Sanjiangkou, China experiences a notable range of temperatures, with highs reaching up to 38°C (101°F) and a pleasant average of 27°C (81°F), while the cooler nights dip to a minimum of 18°C (65°F). The month is characterized by a moderate precipitation total of 104 mm (4.1 in), spread over approximately 13 days, contributing to a 70% humidity level that enhances the lush landscapes of the region. Visitors can expect a balance of warm days and refreshing showers, making it a unique time to explore the vibrant surroundings.
In September, Sanjiangkou experiences a noticeable transition as summer starts to wane, yet temperatures remain pleasantly warm. The minimum temperature hovers around 18°C (65°F), providing a mild start to the autumn season. With an average temperature of 27°C (81°F), the city enjoys comfortably warm days, perfect for outdoor activities. The maximum temperature can soar to a steamy 38°C (101°F), reflecting the tail end of the summertime heat. This month marks a shift from the peak summer heat of July and August, while still offering plenty of warmth to relish before the cooler October days arrive. Overall, September showcases Sanjiangkou's ability to blend late summer warmth with the beginnings of autumn, creating a delightful climate for residents and visitors alike.
In September, Sanjiangkou experiences a notable shift in its climatic patterns, with precipitation amounting to 104 mm (4.1 in) across 13 days of rainfall. This marks a decrease from the preceding months, particularly August, which recorded an impressive 312 mm (12.3 in) over 22 days. As the region transitions from the peak rainy season, September still maintains a significant rainfall figure, reflecting the lingering influence of summer monsoons. This month serves as a bridge to the drier autumn months, where October sees a sharp drop in both precipitation and rainy days, with only 33 mm (1.3 in) predicted. The gradual decline in rainfall not only shapes the local ecosystem but also sets the stage for a shift in agricultural practices and water resource management as the region prepares for the colder months ahead.
In September, Sanjiangkou experiences a notable dip in humidity with a level of 70%, marking the lowest point in the year. This decrease follows the summer months, where humidity peaks, particularly in May with 85% and remains high through July. As the seasons transition into autumn, the moisture in the air begins to recede, setting the stage for drier and crisper conditions ahead. The trend reveals a gradual decline from the summer's humidity, hinting at the approach of October's more moderate 73%, suggesting a refreshing change after the sultry months. This fluctuation not only offers relief but also signifies the rich seasonal changes characteristic of this region in China.
In Sanjiangkou, China, the September UV Index remains notable, reaching an extreme level of 11, with a burn time of just 10 minutes. This marks a slight reduction from the peak levels seen during the summer months, where the UV Index consistently hit 13, reflecting a trend of high sun exposure from April through August. As the seasons transition towards autumn, the UV Index remains elevated, underscoring the importance of sun protection even in September. Monitoring these levels is crucial for outdoor activities as we head into cooler months; for more details, visit the Sanjiangkou UV Index.
UV Risk Categories
As September arrives in Sanjiangkou, China, the days remain sun-drenched, with 284 hours of glorious sunlight illuminating the landscape. This month marks a slight decline from the summer peak of 315 hours in July but still boasts significant brightness, reflecting a vibrant transition from the sun-soaked days of summer to the cooler embrace of autumn. The year has shown a consistent upward trend in sunshine hours from January's 195 hours through to May, culminating in a delightful burst of light during the summer months. While September retains a generous amount of sunshine, it paves the way for a gradual tapering into the autumn months, with October and November featuring fewer daylight hours, resting at 259 and 233 hours respectively. This ebb and flow of sunlight not only shapes the climate but also enhances the charm of Sanjiangkou as the seasons shift.
As summer fades, September in Sanjiangkou, China, brings a refreshing change with a 48% chance of sunny weather. This marks a noticeable increase compared to the sunniest months earlier in the year, particularly the stark drop in sunlight during the sweltering summer months of June and July, which dip to just 4% and 26%, respectively. Although September experiences a significant uptick from these lows, it's worth noting that the probability of sunshine remains lower than earlier in the year, particularly in January with a robust 64% chance. As the city transitions into autumn, those hoping for clear skies can find some solace in September's moderate likelihood of sunny days, bridging the gap between the heavy rains of summer and the cooler, clearer days of fall.
As summer transitions to autumn in Sanjiangkou, China, September showcases a balance of 12 hours of daylight, mirroring the longer days of April and March. Following a peak in daylight during May, June, and July when the sun graces the region for a generous 13 hours, the daylight begins to gradually taper off. This decline signifies the onset of fall, as October further reduces daylight to 11 hours, echoing the trend of shorter days that will continue into the winter months. Overall, September stands as a pivotal month, where the lingering warmth of summer still coexists with the gradual shift towards the shorter days of the approaching colder season.
As summer transitions into autumn in Sanjiangkou, September brings a noticeable dip in wind speed, averaging just 1.9 m/s (4 mph)—the calmest month of the year. This gentle breeze offers a tranquil reprieve, contrasting sharply with the more robust winds seen in the preceding months. Notably, September serves as a bridge to the gustier fall conditions, with October's wind speed jumping to 3.7 m/s (8 mph). The overall trend throughout the year reveals a cycle of mildness, peaking in the winter months when speeds vary between 2.8 m/s (6 mph) and 3.7 m/s (8 mph). As nature settles into its fall rhythm, the subtle shift in wind patterns invites visitors and locals alike to savor the serene atmosphere that September graciously offers.
Weather in Sanjiangkou varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sanjiangkou, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 18°C (65°F) at night to a scorching 38°C (101°F) during the day, with an average of 27°C (81°F). The high humidity of 70% and substantial precipitation of 104 mm (4.1 in) over 13 days contribute to a warm, but sometimes wet atmosphere. In contrast, January experiences a cooler climate, with temperatures dropping to as low as -2°C (29°F) at night and reaching a maximum of 28°C (82°F) during warmer days, averaging around 13°C (55°F). The month is much drier, with only 30 mm (1.2 in) of precipitation over just 3 days, and humidity rising slightly to 73%. For more detailed insights into January weather, you can explore Sanjiangkou weather in January.
September and February exhibit distinctly different weather patterns. September is marked by warmer temperatures, with a minimum of 18°C (65°F) and an average of 27°C (81°F), peaking at a scorching 38°C (101°F). This month also sees significant rainfall, totaling 104 mm (4.1 in) over 13 days, coupled with a humidity level of 70%. In contrast, February features much cooler conditions, with temperatures ranging from a chilly 1°C (34°F) to a mild maximum of 29°C (84°F) and an average of only 13°C (55°F). The precipitation in February is less intense, at 49 mm (1.9 in) across just 6 days, while the humidity slightly increases to 73%. For more details on February’s climate, check Sanjiangkou weather in February.
September and March showcase contrasting weather patterns. In September, temperatures soar with a minimum of 18°C (65°F) and an average high reaching 38°C (101°F), while precipitation totals 104 mm (4.1 in) over approximately 13 days. The humidity sits at 70%, adding to the sweltering conditions. In contrast, March brings a much cooler atmosphere, with temperatures dropping to a minimum of 4°C (39°F) and an average of 16°C (61°F), peaking at 32°C (89°F). Despite slightly higher precipitation of 108 mm (4.3 in) over 14 days, the humidity increases to 80%, contributing to a different kind of dampness. For a more detailed view of March conditions, visit Sanjiangkou weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a minimum of 18°C (65°F) to a maximum of 38°C (101°F), with an average temperature of 27°C (81°F). The month is characterized by significant humidity at 70% and a total of 104 mm (4.1 in) of precipitation over 13 days. In comparison, April sees cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 32°C (91°F), averaging 20°C (67°F). While April has slightly less precipitation at 82 mm (3.2 in) over 11 days, it has a higher humidity level at 81%. For more details about April weather, visit Sanjiangkou weather in April.
September and May exhibit notable differences in weather patterns. September typically sees warmer temperatures, with minimums around 18°C (65°F), averages at 27°C (81°F), and maximums reaching up to 38°C (101°F). In contrast, May is cooler, with minimum temperatures of 11°C (51°F) and an average of 24°C (75°F). Additionally, May experiences more precipitation, totaling 168 mm (6.6 in) over 16 days, compared to September's 104 mm (4.1 in) over 13 days. The humidity is higher in May at 85%, compared to September's 70%, contributing to a more humid atmosphere during that month. For more details about May weather, you can visit Sanjiangkou weather in May.
In comparing the weather of September and June, both months exhibit similar average temperatures, hovering around 27°C (81°F). However, September tends to be slightly warmer, with maximum temperatures reaching 38°C (101°F), compared to June's peak of 36°C (98°F). Precipitation levels reveal a significant difference; June experiences much more rainfall, totaling 272 mm (10.7 in) over 20 days, while September has only 104 mm (4.1 in) spread across 13 days. Additionally, June is characterized by a higher humidity level at 81%, compared to 70% in September. For a more detailed look at June weather, you can check out Sanjiangkou weather in June.
In comparing the weather of September and July, September generally offers slightly milder temperatures, with an average of 27°C (81°F) compared to July's average of 29°C (84°F). While September has a higher maximum temperature of 38°C (101°F), July's minimum temperature starts at a warmer 23°C (74°F). Precipitation is noteworthy in both months, with July receiving 134 mm (5.3 in) over 16 days and September recording 104 mm (4.1 in) over 13 days. Additionally, the humidity is higher in July at 84%, compared to September's 70%. For more details, you can visit Sanjiangkou weather in July.
In comparing the weather of September to that of August, September experiences a slightly cooler temperature range, with average temperatures peaking at 27°C (81°F) compared to August’s average of 28°C (83°F). However, September boasts higher maximum temperatures, reaching up to 38°C (101°F). While both months are humid, September has a bit lower humidity at 70%, as opposed to August’s 82%. One notable difference is in precipitation: September sees less rainfall with 104 mm (4.1 in) across 13 days, while August is significantly wetter, receiving 312 mm (12.3 in) over 22 days. For more details on August weather, you can check Sanjiangkou weather in August.
September typically features warmer weather compared to October, with average temperatures peaking at around 27°C (81°F) and highs reaching up to 38°C (101°F). It’s also a month characterized by significant rainfall, averaging 104 mm (4.1 in) over 13 days, contributing to a humidity level of 70%. In contrast, October sees a drop in temperatures, with averages around 23°C (73°F) and maximums reaching 36°C (97°F). Additionally, the month is much drier, with only 33 mm (1.3 in) of precipitation over just 5 days, while humidity slightly increases to 73%. For more detailed information on weather conditions, you can check Sanjiangkou weather in October.
In September, the weather is characterized by higher temperatures, with a minimum of 18°C (65°F) and an average of 27°C (81°F), reaching up to 38°C (101°F) on the hottest days. Alongside these warm temperatures, September experiences significant rainfall, with about 104 mm (4.1 in) of precipitation spread over 13 days, and humidity levels averaging 70%. In contrast, November brings a noticeable drop in temperatures, featuring a minimum of 8°C (47°F) and an average of 19°C (66°F), peaking at 30°C (87°F). Rainfall also decreases during this month to 45 mm (1.8 in), with precipitation occurring over just 7 days, and humidity levels slightly increasing to 77%. For a detailed look at November weather, visit Sanjiangkou weather in November.
The weather in September contrasts sharply with that of December, showcasing a significant shift in temperature and precipitation. In September, temperatures range from a minimum of 18°C (65°F) to a scorching maximum of 38°C (101°F), with an average of 27°C (81°F) and substantial precipitation of 104 mm (4.1 in) over 13 days. This month experiences high humidity at 70%. In contrast, December brings much cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 28°C (83°F), averaging around 14°C (58°F). The precipitation drops to just 25 mm (1.0 in) across only 3 days, coupled with increased humidity at 79%. For more details on December weather, check out Sanjiangkou weather in December.
As September arrives in Sanjiangkou, the weather begins to showcase a distinct transition. With average temperatures hovering around 27°C (81°F), this month feels significantly warmer than the cooler preceding months, yet not as sweltering as the peak summer heat. Expect an increase in humidity, which often makes the air feel heavier, while intermittent rainfall—averaging about 104 mm over 13 days—can bring refreshing relief from the heat. It’s a time when the lush surroundings thrive, reminding us of the beauty that the blend of warmth and moisture can create. For a deeper understanding of this region's diverse weather patterns, visit Sanjiangkou Climate.