Last updated: August 21, 2025
In September, Chang'an, China experiences a delightful transition towards autumn, characterized by a maximum temperature of 30°C (87°F) and an average temperature of 20°C (68°F), dipping to a refreshing 12°C (53°F) at night. Rainfall is prominent, with a total precipitation of 208 mm (8.2 in) over 19 days, contributing to a humid atmosphere with a moisture level of 77%. This blend of warmth and humidity, accompanied by frequent showers, creates a unique and vibrant environment perfect for enjoying the lush natural landscapes.
In Chang'an, China, September marks a transition into milder temperatures, offering a delightful reprieve from the sweltering summer heat. With minimum temperatures hovering around 12°C (53°F) and averages settling at a comfortable 20°C (68°F), the days remain pleasant for outdoor activities. The maximum temperatures can reach up to 30°C (87°F), allowing for a lingering warmth, especially during the initial weeks of the month. As autumn approaches, the shift is subtle yet noticeable, gradually paving the way for cooler days ahead. This blend of warmth and comfort makes September an ideal time to explore the rich history and vibrant culture of this ancient city.
In September, Chang'an, China, experiences a significant transition in its precipitation patterns, with rainfall amounting to 208 mm (8.2 in) over 19 days. This marks a slight decrease from the peak of 393 mm in July, yet still represents a robust mid-autumn average that showcases the region's lush landscape. Following the steamy monsoon months of June and July, September's precipitation helps sustain the vibrant foliage and agricultural activities as temperatures begin to cool. The rainfall, while substantial, is part of a gradual decline leading into the drier months ahead, reflecting a broader trend of decreasing precipitation as the year progresses.
In September, Chang'an experiences a notable decrease in humidity, dropping to 77% after the summer months. This shift marks a transition from the peak humidity levels typically seen in July and August, where humidity hovered around 87% and 85% respectively. As the city moves into autumn, humidity levels remain relatively comfortable, aligning with the general trend of a gradual decline after the sweltering summer. Interestingly, while September is less humid than its predecessors, it still resides higher than the October average of 81%, suggesting that the lingering warmth of summer still casts a shadow over the early autumn days. Overall, September serves as a bridge between the humid summer and the drier climate of fall, showcasing nature’s rhythmic ebb and flow.
As summer transitions into autumn, September in Chang'an, China maintains an extreme UV Index of 11, mirroring the intense exposure levels seen in the peak months of May through August. Despite a slight dip from the summer highs, the burn time remains critical at only 10 minutes, emphasizing the need for sun protection. This trend reflects a gradual decrease in UV intensity as the year progresses, but with the UV Index still characterized as extreme, individuals should remain vigilant. The shift from summer's relentless rays to the milder sun of October, where the UV Index drops to 9, signals the beginning of safer sun exposure, yet the importance of protection cannot be overstated. For more details on UV levels throughout the year in Chang'an, check out the Chang'an UV Index.
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In Chang'an, China, the month of September brings a delightful transition as summer fades into autumn, showcasing 239 hours of sunshine. This trend reflects a slight decline from the sun-soaked days of August, which boasts an impressive 310 hours of brightness, but still maintains a vibrant glow compared to earlier months like January. The increasing trend in sunshine hours begins in January with just 142 hours and steadily climbs, peaking in the heart of summer. As autumn approaches, September holds onto a significant amount of sunlight, hinting at the region’s gradual shift towards cooler, yet still bright days. This blend of warmth and brightness serves as a gentle reminder of the changing seasons in this historic city.
As September arrives in Chang'an, China, the likelihood of sunny weather sees a notable uptick, with a 41% chance of sun. This increase marks a return to brighter skies after the relatively overcast months of June, July, and August, where chances hovered between 20% and 26%. Comparatively, September’s sunshine is reminiscent of the winter months, where December and November boast 40% and 39% chance of sunny days, respectively. The transition into autumn offers a gentle reprieve from the summer's heat, making it an inviting time for outdoor activities. With clear days on the horizon, residents and visitors alike can look forward to enjoying the pleasant weather that September brings.
As September arrives in Chang'an, China, the daylight duration begins to subtly shift, offering a blend of summer's lingering glow and autumn's encroaching embrace. With 12 hours of daylight, this month marks a gentle decline from the peak of 14 hours experienced in June. Following a consistent pattern, the daylight hours gradually decrease, with October set to bring an even shorter 11 hours. This trend not only highlights the transition between seasons but also sets the stage for the cozy charm of fall, as days become a touch shorter and evenings begin to cool. Embracing September's brilliant days, Chang’an prepares for the softer light of autumn, inviting its inhabitants to savor the warmth before winter's arrival.
As September arrives in Chang'an, the gentle whispers of the wind reveal a slight uptick in average speeds, reaching 1.4 m/s (3 mph). This marks a notable increase from the summer months and reflects a subtle transition into autumn's embrace. The trend reveals a consistent pattern; after fluctuating between 1.1 m/s and 1.4 m/s earlier in the year, winds pick up their pace in September and maintain this briskness into October. As the leaves begin to change, the invigorating breeze carries hints of approaching cooler days while offering a refreshing boost to the vibrant life of the city.
Weather in Chang'an varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chang'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures typically range from a mild minimum of 12°C (53°F) to a warm maximum of 30°C (87°F), with an average of 20°C (68°F). The month is marked by significant rainfall, totaling 208 mm (8.2 in) over 19 days, and a humidity level of 77%. In contrast, January experiences much colder temperatures, with a minimum of -7°C (19°F) and a maximum of 14°C (57°F), averaging just 3°C (38°F). Precipitation is considerably lower at 54 mm (2.1 in) over 10 days, accompanied by a humidity level of 72%. For those interested in more detailed January weather specifics, you can explore Chang'an weather in January.
September and February present striking contrasts in weather conditions. In September, temperatures range from a pleasant 12°C (53°F) at night to a warm 30°C (87°F) during the day, with an average of 20°C (68°F). However, it is also the wettest month, experiencing significant rainfall of 208 mm (8.2 in) over 19 days and a humidity level of 77%. In contrast, February features much cooler temperatures, with lows plummeting to -4°C (24°F) and a daytime maximum of 22°C (72°F), averaging just 5°C (41°F). This winter month sees much less precipitation at 66 mm (2.6 in) over 11 days, coupled with a slightly lower humidity of 76%. For more details, check out Chang'an weather in February.
September generally offers warmer temperatures compared to March, with average highs reaching up to 30°C (87°F) versus March's peak of 26°C (79°F). However, September experiences more precipitation, with about 208 mm (8.2 in) over 19 days, while March sees less rain, totaling 145 mm (5.7 in) across 15 days. The humidity levels in March are slightly higher at 87%, compared to September's 77%. For a more detailed understanding of the weather during this time, you can check Chang'an weather in March.
September and April present distinctly different weather patterns. In September, the temperatures range from a minimum of 12°C (53°F) to a maximum of 30°C (87°F), with an average of 20°C (68°F). This month experiences considerable rainfall, with 208 mm (8.2 in) of precipitation over approximately 19 days, while humidity levels are around 77%. In contrast, April is cooler, featuring temperatures that range from 3°C (37°F) to 28°C (83°F), with an average of 14°C (57°F). Although it receives slightly less precipitation at 169 mm (6.6 in) over 15 days, the humidity remains high at 82%. For more details about the weather in April, visit Chang'an weather in April.
In comparing the weather of September and May, both months share a maximum temperature of 30°C (87°F), but September boasts a higher average of 20°C (68°F) compared to May's 18°C (64°F). While September experiences a minimum temperature of 12°C (53°F), May starts off cooler with a minimum of 8°C (47°F). Precipitation is more abundant in May, with 239 mm (9.4 in) over 17 days, whereas September sees 208 mm (8.2 in) spread across 19 days. Additionally, May has a slightly higher humidity level at 83% compared to September's 77%. For more detailed insights, you can check Chang'an weather in May.
September and June present a transitional phase in weather patterns, with both months displaying similar minimum temperatures of around 12°C (53°F). However, June slightly edges out with an average temperature of 21°C (70°F) compared to September's 20°C (68°F). The upper limits are also nearly indistinguishable, as June reaches a maximum of 31°C (89°F) while September peaks at 30°C (87°F). Precipitation in June is significantly higher at 280 mm (11.0 in) over 19 days, compared to September’s 208 mm (8.2 in), suggesting that June is typically wetter. Additionally, humidity levels are increased in June at 84%, contrasted with September's 77%. For a closer look at June weather conditions, check out Chang'an weather in June.
In comparing the weather between September and July, July tends to be warmer with average temperatures reaching 24°C (75°F), peaking at 34°C (93°F). In contrast, September sees a cooler average of 20°C (68°F) and a maximum of 30°C (87°F). However, July experiences significantly more precipitation, with 393 mm (15.5 in) falling over 21 days, compared to September's 208 mm (8.2 in) over 19 days. Additionally, July is characterized by higher humidity levels at 87%, while September's humidity is a bit lower at 77%. For a more detailed look at July's weather patterns, you can visit Chang'an weather in July.
September's weather shows a notable transition from the warmth of August. While August boasts a higher average temperature of 24°C (75°F) with maximum highs reaching 34°C (93°F), September cools down with an average of 20°C (68°F) and a maximum of 30°C (87°F). Additionally, September experiences slightly more rainfall, totaling 208 mm (8.2 in) over 19 days, compared to August's 181 mm (7.1 in) over 18 days. Humidity levels also dip from 85% in August to 77% in September, marking a shift towards more comfortable conditions. For a deeper look at August's climate specifics, you can check Chang'an weather in August.
September and October exhibit distinct weather patterns as autumn sets in. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 30°C (87°F), with an average of 20°C (68°F). This month experiences considerable rainfall, totaling 208 mm (8.2 in) across 19 days, alongside a humidity level of 77%. By contrast, October sees cooler temperatures, with minimums dropping to 6°C (44°F) and an average of 14°C (58°F), while high temperatures taper off to a maximum of 29°C (84°F). Precipitation decreases significantly to 139 mm (5.5 in) over 14 wet days, and humidity rises slightly to 81%. For more insights on October weather, visit Chang'an weather in October.
September and November show a distinct contrast in weather patterns. September experiences milder temperatures, ranging from a minimum of 12°C (53°F) to a maximum of 30°C (87°F), with an average of 20°C (68°F). The month is notably wetter, with 208 mm (8.2 in) of precipitation across 19 days, contributing to a humidity level of 77%. In stark contrast, November brings cooler conditions, with temperatures dropping to a minimum of 0°C (33°F) and peaking at 20°C (68°F), averaging just 9°C (49°F). This month sees significantly less rainfall, totaling 76 mm (3.0 in) over 11 days, while humidity rises to 86%. For more detailed insights, you can check Chang'an weather in November.
In September, the weather is much warmer, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 30°C (87°F) and an average of 20°C (68°F). The month sees significant rainfall, with 208 mm (8.2 in) of precipitation over 19 days, accompanied by a humidity level of 77%. In contrast, December experiences much colder temperatures, with a minimum of -4°C (26°F), an average of 4°C (40°F), and a maximum of 14°C (58°F). Precipitation drops to 38 mm (1.5 in) across just 9 days, while humidity slightly increases to 81%. For more details, check out Chang'an weather in December.
As September rolls in, Chang'an experiences a refreshing shift in weather, marked by a pleasant blend of mild temperatures and increased humidity. While the city warms up during the day, cool evenings provide a welcome contrast, making it a comfortable time for outdoor activities. Unlike the hotter summer months, September also sees a notable rise in precipitation, with frequent rain showers that nourish the landscape and keep the air crisp. This transitional month stands out with its invigorating humidity, creating a lush, vibrant atmosphere inviting exploration. For more insights on how Chang'an's weather evolves throughout the year, visit Chang'an Climate.