Last updated: August 21, 2025
September in Siheyuan, China, offers a delightful transition from summer to autumn, with maximum temperatures reaching a pleasant 29°C (84°F) and a refreshing average of 15°C (60°F). Visitors can expect cooler evenings, with minimum temperatures dipping to 4°C (40°F). Although the month experiences 68 mm (2.7 in) of precipitation spread over 9 days, the humidity remains relatively high at 73%, enhancing the lushness of the surroundings. This blend of comfortable warmth and occasional rain sets the stage for an inviting and picturesque exploration of Siheyuan's rich cultural heritage and natural beauty.
In September, Siheyuan experiences a delightful transition from the sweltering summer months to cooler autumn days. With temperatures ranging from a minimum of 4°C (40°F) to a pleasant maximum of 29°C (84°F), the average settles comfortably at 15°C (60°F). This month showcases a significant drop from the summer highs, while still maintaining mild daytime warmth that is ideal for enjoying the beauty of the surrounding landscapes. As the days grow shorter and the air becomes crisp, residents and visitors alike can appreciate the gradual shift towards autumn, making September a charming time to explore this historic area.
In September, Siheyuan experiences a notable dip in precipitation, recording 68 mm (2.7 in) over approximately 9 days. This marks a significant decrease from the preceding month of August, which boasts an impressive 150 mm (5.9 in) across 12 days. As summer transitions into autumn, the rainfall lessens, creating a more refreshing atmosphere for locals. This trend of diminishing precipitation continues into October, when the region averages 50 mm (2.0 in). This shift not only signals the end of the monsoon-like conditions that define the peak summer months but also paves the way for the dry months to come, offering a brief respite before the cooler, drier autumn firmly sets in.
September in Siheyuan, China, brings a notable increase in humidity, rising to 73%, which aligns with the trend of heightened moisture seen in previous months. After a brief dip during May and July, where humidity fell to 58% and 59% respectively, the late summer and early autumn months see a resurgence in humidity levels. This uptick is further echoed in October, reaching 77%, and November, which holds at 74%. Such patterns suggest a gradual shift towards a more humid climate as the seasons transition, making September a pivotal month for embracing the lush atmosphere that characterizes this historic region.
As September rolls into Siheyuan, the UV Index remains high at 9, signaling a very high exposure category, which can lead to potential skin damage in as little as 15 minutes. This reflects a downward trend from August’s peak UV Index of 11, yet still requires caution during outdoor activities. Notably, the summer months showcased a consistent extreme Index, with July and June both reaching 12, demanding vigilance to protect against harmful UV rays. Comparing this seasonal progression, September offers a slight reprieve, preparing residents for a gradual descent into more manageable levels in October. For comprehensive details, you can check the Siheyuan UV Index.
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In September, the sun continues to shine brightly in Siheyuan, China, contributing 275 hours of delightful sunlight. This marks a subtle decline from the summer peak of 340 hours in July and 311 hours in August, reflecting the gradual transition into autumn. Overall, the warmer months—from May to August—boast an impressive total of over 300 hours, while the onset of fall reveals a consistent but softer embrace of sunlight as the year winds down. Despite the slight dip in hours, September still holds onto the last vestiges of summer warmth, inviting locals and visitors alike to enjoy the unique charm of Siheyuan under a golden sun.
In September, the likelihood of sunny weather in Siheyuan, China, stands at 40%, reflecting a dip from the summer months. This period transitions from the vibrant warmth of July and August, which see sunnier days with chances of 55% and 48%, respectively. As autumn begins to settle in, the tendency for clear skies wanes, falling below the highs of earlier in the year. Notably, October continues this trend with an even lower 34% chance of sunshine, indicating that September is a pivotal moment as summer's glow begins to fade into the cooler, cloudier months ahead. Thus, while not entirely devoid of sunshine, September in Siheyuan presents a more unpredictable weather pattern, inviting both optimism and caution for those seeking sunny days.
As summer gives way to autumn in Siheyuan, China, September ushers in a gentle decline in daylight duration, providing approximately 12 hours of light each day. This slight reduction follows the peak of 14 hours experienced during the summer months of June through August. The transition reflects a gradual shift in the season, where longer days yield to cooler evenings and the vibrant landscape begins to hint at autumn's arrival. Observing the trend from January to September, it's evident that daylight steadily increased from the winter minimum of 9 hours at the start of the year, reaching a peak in mid-summer, before gradually tapering off again. This rhythm of daylight not only marks the changing seasons but also enriches the cultural tapestry of daily life in Siheyuan, as each month unfolds with its unique charm and character.
As autumn approaches in Siheyuan, China, September brings a gentle breeze with an average wind speed of 2.9 m/s (7 mph), marking the calmest winds of the year. This decrease plays a stark contrast to the spring months when gusts reach up to 4.1 m/s (9 mph) in May, stirring life into the traditional courtyard homes. Following the humid summer months of June and July, where winds also linger at 3.0 m/s (7 mph), September's soft winds evoke a sense of transition, creating a serene atmosphere ideal for reflection as the temperature begins to cool. The gradual decline in wind speed throughout the late summer serves as a reminder of nature's rhythm, leading residents to embrace the cozy pleasures of autumn in their historic surroundings.
Weather in Siheyuan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Siheyuan, 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 4°C (40°F) at night to a warm 29°C (84°F) during the day, with an average of 15°C (60°F). This month experiences about 68 mm (2.7 in) of precipitation over 9 days, accompanied by a relatively high humidity level of 73%. In contrast, January ushers in extreme cold, with temperatures plummeting to a minimum of -23°C (-9°F) and only reaching a maximum of 10°C (51°F), averaging -5°C (23°F). Precipitation is scant in January at just 6 mm (0.3 in) spread over 1 day, and the humidity drops to 60%. For more detailed insights, you can check out the Siheyuan weather in January.
September and February present stark contrasts in weather patterns. In September, temperatures range from a cool 4°C (40°F) at night to a warm 29°C (84°F) during the day, with an average of 15°C (60°F). The month experiences moderate precipitation with 68 mm (2.7 inches) spread over 9 days, accompanied by a relatively high humidity level of 73%. In contrast, February brings a winter chill, with temperatures plummeting to a minimum of -20°C (-3°F) and averaging around -2°C (28°F). The maximum temperature reaches only 18°C (65°F), while precipitation is significantly lower at 13 mm (0.5 inches) over just 3 days and humidity sits at 66%. For more details on February weather, you can visit Siheyuan weather in February.
September and March showcase a significant contrast in weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 29°C (84°F), with an average of 15°C (60°F), making it a generally warmer month. This period also experiences a relatively high level of precipitation, with around 68 mm (2.7 in) over 9 days and humidity sitting at 73%. In contrast, March is much cooler, with temperatures dipping as low as -8°C (19°F) and peaking at 23°C (74°F), averaging just 5°C (42°F). This month sees considerably less rainfall, with only 17 mm (0.7 in) over 4 days and a slightly lower humidity level of 68%. For more details on the weather, you can visit Siheyuan weather in March.
The weather in September typically features a broader range of temperatures, with a minimum of 4°C (40°F) and an average of 15°C (60°F), while still reaching a maximum of 29°C (84°F). In contrast, April experiences cooler conditions, with a minimum temperature of -4°C (25°F) and an average of 11°C (52°F), although it can also peak at 29°C (84°F). September sees more precipitation, with 68 mm (2.7 in) spread over 9 days, compared to April's 34 mm (1.4 in) over just 6 days. Despite the differences, both months share a humidity level of 73%. For more specific details about April weather, you can check Siheyuan weather in April.
In comparing the weather between September and May, we see notable differences in temperature and conditions. September experiences a wider temperature range, with a minimum of 4°C and a maximum of 29°C, while May has cooler nights with a minimum of 1°C but can reach up to 31°C during the day. Precipitation is more prevalent in September, averaging 68 mm over 9 days, compared to May's lighter rainfall of 34 mm over just 5 days. Additionally, September tends to be more humid at 73%, contrasting with May's relatively drier atmosphere at 58%. For more detailed information about May weather, check out Siheyuan weather in May.
In comparing the weather of September and June, September experiences a more varied temperature range with a minimum of 4°C (40°F) and a maximum of 29°C (84°F), averaging around 15°C (60°F). In contrast, June maintains a warmer climate, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 32°C (90°F), averaging 20°C (68°F). Precipitation is slightly higher in September at 68 mm (2.7 in) over 9 days compared to June's 51 mm (2.0 in) over 8 days, and September also exhibits higher humidity levels at 73% versus June's 65%. For more detailed insights on June weather, visit Siheyuan weather in June.
In comparing the weather between July and September, it is clear that July tends to be warmer overall, with average temperatures peaking at 22°C (72°F) compared to September's 15°C (60°F). July also experiences higher maximum temperatures, reaching up to 35°C (96°F) versus September's maximum of 29°C (84°F). However, September showcases a more significant drop in minimum temperatures, starting as low as 4°C (40°F), whereas July has a milder minimum of 11°C (53°F). Additionally, July receives more precipitation, at 94 mm (3.7 in) over 11 days, while September sees 68 mm (2.7 in) over 9 days. Interestingly, September has higher humidity levels at 73%, contrasting with July's 59%. For a closer look at July's specific weather characteristics, you can check Siheyuan weather in July.
In comparing the weather between August and September, one can observe a notable shift in temperatures and precipitation. While August offers warmer conditions with a minimum temperature of 10°C (51°F) and an average of 20°C (69°F), September cools down significantly, featuring a minimum temperature of just 4°C (40°F) and an average of 15°C (60°F). Additionally, August experiences a higher maximum temperature of 35°C (95°F) compared to September's peak at 29°C (84°F). Precipitation also varies, with August receiving 150 mm (5.9 in) over 12 days, whereas September shows a decrease to 68 mm (2.7 in) over 9 days. Notably, the humidity is slightly higher in September at 73%, while August maintains a lower humidity level of 60%. For more details on the weather specifics for August, you can check out Siheyuan weather in August.
As September transitions into October, the weather undergoes a notable shift. September boasts a warmer average temperature of 15°C (60°F), with highs reaching up to 29°C (84°F), while October cools down significantly with an average of 8°C (47°F) and a maximum of 26°C (79°F). Precipitation decreases slightly from 68 mm (2.7 in) over 9 days in September to 50 mm (2.0 in) over 7 days in October. Additionally, October experiences slightly higher humidity at 77% compared to September's 73%. For more detailed insights on weather conditions in October, visit Siheyuan weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 29°C (84°F), with an average of 15°C (60°F), making it a warm and pleasant month. It does, however, include about 68 mm (2.7 in) of precipitation over 9 days and maintains a humidity level of 73%. In contrast, November sees a significant drop in temperatures, with a minimum of -11°C (13°F) and an average of just 2°C (36°F), although it can still reach a maximum of 16°C (62°F). The precipitation is much lower at 15 mm (0.6 in) over just 3 days, while humidity slightly increases to 74%. For more specific insights into November weather patterns, check out Siheyuan weather in November.
In September, the weather typically features a wide range of temperatures, with minimums around 4°C (40°F) and maximums reaching up to 29°C (84°F). This transitional month often brings a fair amount of rainfall, totaling 68 mm (2.7 in) over approximately 9 days, contributing to a higher humidity level of 73%. In contrast, December presents a starkly different climate, characterized by much colder temperatures, with averages around -5°C (24°F) and an extreme minimum of -20°C (-4°F). Unlike September, precipitation is minimal in December, amounting to just 4 mm (0.2 in) over 1 day, and humidity is slightly lower at 69%. For more details on weather conditions during this month, check out Siheyuan weather in December.
As September unfolds in Siheyuan, the weather exhibits a delightful transition from the warmth of summer to the cooler embrace of autumn. The average temperature remains comfortable, offering a welcome respite with less humidity compared to the sweltering peak of summer. Although there’s a slight uptick in precipitation—characterized by about nine rainy days—this moisture contributes to the lush greenery of the region. This month stands out as a harmonious blend of warm days and crisp evenings, distinctly different from the height of summer's heat and the chillier months to come. For more insights into the weather patterns of Siheyuan, check out the Siheyuan Climate.