Last updated: August 21, 2025
Experience the captivating September weather in Xi'an, China, where the days bring a pleasant maximum temperature of 30°C (87°F), perfectly balanced by an inviting average of 20°C (69°F). As the season transitions, evenings cool down to a refreshing 6°C (44°F), making it ideal for outdoor explorations. This month also sees an average precipitation of 95 mm (3.7 in), falling over 8 days, contributing to the lush scenery. Coupled with a humidity level of 72%, September in Xi'an offers a comfortable climate that invites both tourists and locals to savor the beauty of this historic city amidst gentle rains and warm sunshine.
In September, Xi'an begins to transition from the sweltering summer heat to a more temperate climate. With minimum temperatures dropping to 6°C (44°F) and maximums peaking at a comfortable 30°C (87°F), the city offers a pleasant average of 20°C (69°F), perfect for exploring its rich history and culture. This shift marks a welcome relief from the summer highs, which can reach up to 38°C (100°F) in the preceding months. As autumn approaches, the evenings become crisp and refreshing, inviting locals and visitors alike to enjoy outdoor activities, making it an ideal time for a visit to this ancient city. The gradual cooling sets the stage for the colorful changes of fall, creating a beautiful backdrop for experiencing Xi'an’s breathtaking landscapes and vibrant street life.
In September, Xi'an experiences a notable precipitation, with an average of 95 mm (3.7 in) spread over 8 days. This month marks a decline from the intense rainfall of August, which saw a staggering 232 mm (9.1 in) over 14 days, signaling the transition from the peak of the summer monsoon. As autumn approaches, September's rainfall provides a moderate yet essential watering, contributing to the lush scenery that characterizes the region. This shift reflects a more balanced precipitation pattern leading into the drier months of October and November, indicating a gradual retreat of the summer rains. Overall, September serves as a pivotal point in Xi'an's seasonal climate, bridging the transition from summer's heavy downpours to the milder showers of fall.
As summer transitions to autumn in Xi'an, September offers a notable shift in humidity levels, averaging 72%. After reaching a peak in the sweltering months of July and August, where humidity levels soared to 82% and 83% respectively, September brings a slight respite, although the air remains quite moist. This month is characterized by a gradual decline from the summer peak, yet it still retains more humidity than many earlier months. The trend indicates a movement towards drier conditions as the year progresses, with October anticipated to rise again to 76%, suggesting that Xi'an's climate remains dynamic, ebbing and flowing as the seasons change.
In September, Xi'an, China, sees a UV Index of 7, indicating a high level of sun exposure that calls for caution. With a burn time of 25 minutes, this month marks a slight decrease from the peak levels experienced during the scorching summer months of July and August, both with a UV Index of 10. As the autumn season approaches, the UV intensity begins to decline, but it's still essential to protect your skin while enjoying outdoor activities. The steady transition in UV exposure from the heights of summer to the more moderate levels of early autumn is evident, reminding us that sun safety remains important year-round. For detailed insights on UV levels throughout the year, visit Xi'an UV Index.
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As summer gracefully transitions into autumn, September in Xi'an, China, offers a delightful blend of warm sunshine and cooler breezes. With 282 hours of sunlight this month, it stands as a vibrant conclusion to the sun-soaked days of summer, particularly following the peak of 327 hours in July. While September sees a slight dip in brightness compared to the sweltering summer months, it remains significantly sunnier than the chill of winter, reflecting a gradual shift that prepares the city for the crispness of October’s 266 hours. This trend showcases Xi'an's seasonal charm, where each month paints the landscape in a different light, inviting residents and visitors alike to revel in the fading warmth before the colder days set in.
In September, the likelihood of sunny weather in Xi'an, China, stands at 39%, marking a decline from the summer months. This drop follows the peak sunshine months of June and July, which recorded only 40% and 34% respectively. As the season transitions into autumn, the sunshine chances gradually begin to recover, signaling that October's 61% may offer more favorable weather for outdoor activities. Overall, September emerges as a transitional period where sunny days become less frequent, aligning with the broader trend of decreasing sunlight as summer gives way to fall.
As September arrives in Xi'an, China, daylight begins its graceful decline, offering 12 hours of light—a gentle transition from the sun-drenched summer months. Following a peak of 15 hours in June, daylight steadily wanes in July and August, settling into a more moderate rhythm. This month marks a notable shift as the days grow shorter, paving the way for the cozy feel of autumn. With daylight reducing further into the cooler months, residents and visitors alike can enjoy the enchanting beauty of Xi'an, embracing both the fading light and the burgeoning fall atmosphere.
As September arrives in Xi'an, the winds weave a gentle tapestry of change, with an average speed of 3.0 m/s (7 mph). This marks a slight dip from the summer's softer breezes, where July and August recorded their lowest speeds of 3.1 m/s (7 mph) and 2.8 m/s (6 mph), respectively. The winds begin to pick up again with the onset of October, reflecting a trend of increasing gustiness as the year progresses into autumn. Overall, September serves as a transitional phase, with its breezes still whispering of summer while hinting at the briskness that will soon envelop the ancient city.
Weather in Xi'an varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Xi'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase starkly contrasting weather patterns. In September, temperatures range from a mild 6°C (44°F) to a warm 30°C (87°F), with an average of 20°C (69°F). This month experiences considerable precipitation of 95 mm (3.7 in) over approximately 8 days, accompanied by relative humidity at 72%, creating a lush and humid atmosphere. In contrast, January sees frigid temperatures with a minimum of -23°C (-9°F) and a maximum of 7°C (45°F), averaging -7°C (19°F). Precipitation is minimal, only 4 mm (0.1 in), occurring on just 1 day, and the humidity drops to 54%, leading to a dry and icy landscape. For more details on the January climate, you can refer to Xi'an weather in January.
In September, the weather is generally warm and welcoming, with temperatures ranging from a mild 6°C (44°F) at night to a high of 30°C (87°F) during the day, averaging around 20°C (69°F). The month sees a fair amount of rainfall, totaling 95 mm (3.7 in) over approximately 8 days, and humidity levels are relatively high at 72%. In contrast, February presents a starkly different climate, characterized by much cooler temperatures that drop as low as -19°C (-2°F) and averaging around -4°C (25°F). This month experiences minimal precipitation, with only 7 mm (0.3 in) occurring over about 2 days, and the humidity is significantly lower at 44%. For more detailed insights into February weather in specific regions, you can refer to Xi'an weather in February.
September and March exhibit stark contrasts in weather conditions. September boasts warmer temperatures, with a minimum of 6°C (44°F), an average of 20°C (69°F), and a maximum reaching 30°C (87°F). It also experiences higher humidity at 72% and more precipitation, totaling 95 mm (3.7 in) over about 8 days. In contrast, March presents a much chillier climate, where temperatures can drop to a minimum of -12°C (11°F), with an average of only 4°C (40°F) and a maximum of 19°C (67°F). Additionally, March sees significantly less rainfall, with just 12 mm (0.5 in) over approximately 3 days, and lower humidity at 48%. For a detailed overview of March weather, you can refer to Xi'an weather in March.
In September, the weather is typically warmer, with average temperatures ranging from a cool 6°C (44°F) to a warm 30°C (87°F), and an average of about 20°C (69°F). The month also experiences higher humidity at 72%, accompanied by more precipitation, averaging 95 mm (3.7 in) over 8 days.
In contrast, April is noticeably cooler, featuring temperatures that range from a chilly -2°C (28°F) to a comfortable 29°C (85°F), with an average temperature of 13°C (55°F). April sees significantly less rain, with only 26 mm (1.0 in) of precipitation over about 5 days, and lower humidity at 55%. For a detailed look at what to expect, you can check out Xi'an weather in April.
When comparing the weather in September and May, we see notable differences in temperature and humidity. In September, the average temperature is slightly warmer at 20°C (69°F), with a minimum of 6°C (44°F) and a maximum reaching 30°C (87°F). The month experiences higher humidity at 72% and more rainfall, totaling 95 mm (3.7 in) over about 8 days. In contrast, May presents milder conditions, with an average temperature of 19°C (66°F), a minimum of 4°C (39°F), and a maximum of 34°C (93°F). Additionally, May is characterized by lower precipitation of 60 mm (2.4 in) across 7 days and a humidity level of 65%. For more specifics, you can explore Xi'an weather in May.
In comparing the weather between September and June, September tends to be cooler overall, with average temperatures ranging from a minimum of 6°C (44°F) to a maximum of 30°C (87°F), while June experiences warmer conditions, with temperatures ranging from 12°C (54°F) to as high as 38°C (100°F). Although June is generally drier with less precipitation at 78 mm (3.1 in) over 8 days compared to September's 95 mm (3.7 in), both months share a similar humidity level of around 71-72%. For those looking to explore the climate specifics of June in Xi'an, additional insights can be found at Xi'an weather in June.
September weather shows a noticeable transition from the warmth of July. While July boasts higher temperatures, with an average of 27°C (80°F) and a maximum reaching 36°C (97°F), September cools down significantly, averaging 20°C (69°F) and peaking at 30°C (87°F). Additionally, September experiences lower humidity levels at 72%, compared to July's higher average of 82%. Both months see similar precipitation, with September receiving 95 mm (3.7 in) over 8 rainy days, slightly less than July's 104 mm (4.1 in) across 10 rainy days. For more detailed information, check Xi'an weather in July.
In comparing the weather of September and August, September presents a cooler and more temperate climate, with minimum temperatures dropping to 6°C (44°F) and an average of 20°C (69°F), compared to August's warmer minimum of 10°C (51°F) and an average of 25°C (78°F). While September enjoys milder maximum temperatures that reach up to 30°C (87°F), August can be sweltering, peaking at 38°C (100°F). Additionally, September experiences significantly less precipitation at 95 mm (3.7 in) over 8 days, whereas August is much wetter with 232 mm (9.1 in) distributed over 14 days. The humidity is also higher in August at 83%, compared to 72% in September, making the former month feel more oppressive. For a detailed look at August weather patterns, you can refer to Xi'an weather in August.
In September, temperatures in Xi'an typically range from a minimum of 6°C (44°F) to a maximum of 30°C (87°F), with an average of 20°C (69°F). The month sees an average precipitation of 95 mm (3.7 in) over about 8 days, accompanied by a humidity level of 72%. In contrast, October experiences cooler temperatures, with a minimum of -2°C (28°F) and an average of 12°C (54°F), peaking at 29°C (84°F). Precipitation is reduced to 50 mm (2.0 in) over just 4 days, and humidity rises slightly to 76%. This shift marks a significant transition from the warmer, more humid September to the cooler and less rainy October. For more detailed information, check out Xi'an weather in October.
September and November exhibit contrasting weather patterns, reflecting the transition from late summer to late autumn. In September, temperatures range from a mild 6°C (44°F) at night to a warm 30°C (87°F) during the day, averaging around 20°C (69°F). The month sees more precipitation, with 95 mm (3.7 in) of rain falling over 8 days, and a humidity level of 72% contributes to a somewhat muggy feel.
In stark contrast, November experiences a significant drop in temperatures, with nighttime lows plunging to -11°C (12°F) and daytime highs reaching only up to 21°C (70°F), resulting in an average of just 3°C (38°F). This month is much drier, with only 30 mm (1.2 in) of precipitation over just 3 days and a lower humidity level of 66%. For more details on November weather, you can check Xi'an weather in November.
September weather is characterized by relatively warm temperatures, with a minimum of 6°C (44°F), an average of 20°C (69°F), and a maximum reaching up to 30°C (87°F). The month sees considerable rainfall, amounting to 95 mm (3.7 in) over about 8 days, coupled with a humidity level of 72%. In contrast, December brings a stark change, as temperatures plunge with a minimum of -18°C (-1°F), averaging -5°C (24°F) and peaking at just 10°C (51°F). This winter month experiences minimal precipitation, only 6 mm (0.2 in) across 1 day, and lower humidity levels at 52%. For more insights, you can refer to Xi'an weather in December.
As summer transitions into autumn, September in Xi'an offers a refreshing change with milder temperatures and increased rainfall compared to the scorching summer months. The average temperature settles comfortably around 20°C (69°F), allowing for pleasant outdoor activities, while the humidity remains relatively high. This month sees a noticeable uptick in precipitation, often bringing lush greenery back to the landscape and setting the stage for beautiful fall scenery. With around 8 days of rainfall, it’s a time to enjoy the cooler, softer climate before the chill of winter sets in. To explore more about the weather nuances in Xi'an, visit Xi'an Climate.