Last updated: August 21, 2025
September in Xi'an, China offers a blend of warm days and cooler nights, with maximum temperatures reaching up to 36°C (97°F) and an average of 25°C (78°F). The month experiences a moderate minimum temperature of 15°C (60°F), providing pleasant evenings. However, expect a significant precipitation amount of 130 mm (5.1 in) over approximately 15 days, contributing to an overall humidity level of 63%. This mixture of warmth and rain creates a vibrant, lush landscape, ideal for exploring the rich history and culture of the region.
In September, Xi’an, China begins to shift from the sweltering summer heat, showcasing a delightful transition with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 36°C (97°F). The average temperature hovers around 25°C (78°F), providing a comfortable environment for exploring the city's rich history and culture. As the month progresses, the daytime warmth gradually gives way to cooler evenings, hinting at the approaching autumn. This period not only marks a reprieve from the peak summer heat but also invites visitors to enjoy the vibrant scenery and festivities that celebrate the harvest season, making September an ideal time to experience the charm of Xi’an.
In September, Xi'an experiences a notable shift in its precipitation patterns, with an average rainfall of 130 mm (5.1 in) spread over about 15 days. This marks a decrease from the deluges of summer, where June sees the highest rainfall at 297 mm (11.7 in). However, September’s rainfall is still significant, reflecting the transition into autumn. The month stands out as a time when showers begin to taper off, offering a reprieve from the heavier monsoon-like rains characteristic of the preceding months. As the city prepares for cooler temperatures in October, this gradual decline in precipitation signals a shift towards drier days ahead, with rainfall expected to decrease further to 75 mm (3.0 in). Overall, September in Xi'an encapsulates the turning point from the lushness of summer to the crispness of fall.
As the summer heat begins to wane, September in Xi'an, China experiences a noticeable dip in humidity, falling to 63%. This decline marks a refreshing contrast to the sweltering highs of July and August, which see humidity levels reaching a peak of 89% and 87%, respectively. Overall, the month serves as a transitional period, hinting at the drier autumn months ahead. Following September, humidity continues its downward trend, dropping to 59% in October, making this period particularly inviting for those looking to enjoy the city's historical charms without the oppressive stickiness of summer.
In September, Xi'an, China, experiences a UV Index of 11, placing it in the extreme exposure category with a burn time of just 10 minutes. This drop from the peak August levels marks a slight easing, but caution remains essential. Interestingly, from March to August, the UV Index consistently peaked at 13, indicating a trend of high sun exposure during the summer months. September’s moderation signals the approach of autumn, yet the UV levels still warrant protective measures against skin damage. As you enjoy the sunny days in Xi'an, be sure to stay informed and protect yourself against harmful rays by checking the Xi'an UV Index.
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In September, Xi'an basks in the warm embrace of 268 hours of sunshine, a delightful conclusion to the sizzling summer months. Following the peak of 312 hours in August, the sun still shines generously, offering a radiant backdrop for outdoor adventures and cultural explorations. This month shows a marked decrease from the peak summer hours, yet it stands strong compared to the earlier months of the year, which struggled to surpass 200 hours. As the days grow shorter and cooler, September serves as a beautiful transition into autumn, illuminating the historical wonders of this ancient city with a soft, golden glow.
In Xi'an, China, September marks a notable increase in the likelihood of sunny weather, with a 48% chance of sunshine. This is a welcome shift from the summer months, where sunny days tend to dwindle to about 19% in August. As the city transitions from the heat of summer to the cooler autumn, September emerges as a balanced month. The chances of sun improve significantly compared to the preceding months—April, May, and June all feature lower probabilities of clear skies, hovering around 15% to 14%. As the year progresses toward October, which shows a slight decrease to 34%, September stands out as a transitional period, where outdoor adventures are beckoned by its relatively favorable weather. Overall, this month creates an inviting atmosphere for exploration, making it a delightful time to visit Xi'an.
As summer fades into autumn, September in Xi'an, China, offers a balanced 12 hours of daylight, echoing the longer days of the warmer months. This month marks a subtle transition, following the peak of sunshine in July and August, where daylight lingered for 13 hours. As nature prepares for the cooler months ahead, the gradual reduction in daylight is a reminder of the shifting seasons. Looking back, the year begins with shorter days in January and gradually lengthens until it reaches its zenith in summer, before embarking on a slow decline again. September serves as a beautiful midpoint, where day and night are almost equal, inviting residents and visitors alike to savor the lingering warmth of the day before the shorter daylight hours return in October.
As September rolls into Xi'an, a gentle breeze greets the city, with average wind speeds tapering to 1.4 m/s (3 mph). This slight decline marks the transition from the warmer summer months, which experienced slightly higher winds, averaging around 1.7 m/s (4 mph) in the preceding months. As the days grow shorter and autumn approaches, the wind remains soft and soothing, reminiscent of a sigh rather than a gust. The trend of calming winds continues, setting the stage for October when the breezes pick up again to an average of 2.5 m/s (6 mph), ushering in the crispness of fall. This rhythmic dance of winds throughout the year showcases Xi'an's unique climate, blending tranquility with the promise of seasonal change.
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.
When comparing the weather in September and January, it’s evident that they present stark contrasts. September experiences warmer temperatures, with averages around 25°C (78°F) and highs soaring to 36°C (97°F), while January is significantly cooler, with average temperatures only reaching 8°C (47°F) and lows falling to -2°C (28°F). Precipitation is more frequent in September, occurring over 15 days with a total of 130 mm (5.1 in), compared to January's 84 mm (3.3 in) over 10 days. Additionally, while humidity levels are fairly similar, September's average of 63% slightly edges out January's 62%, making September feel warmer and more humid overall. For more detailed insights, you can check out Xi'an weather in January.
The weather in September contrasts sharply with that of February. In September, temperatures range from a mild 15°C (60°F) to a scorching 36°C (97°F), with an average of 25°C (78°F). This month experiences significant rainfall, totaling 130 mm (5.1 in) over approximately 15 days, and a moderate humidity level of 63%.
In contrast, February presents a much cooler climate, with temperatures dipping as low as -2°C (28°F) and reaching a maximum of 26°C (79°F), averaging around 10°C (50°F). Precipitation is slightly higher at 155 mm (6.1 in) over 13 days, accompanied by a humidity level of 66%. For more detailed information on February weather, you can check Xi'an weather in February.
In comparing the weather between September and March, notable differences emerge. September boasts warmer temperatures with a minimum of 15°C (60°F), an average of 25°C (78°F), and a maximum reaching up to 36°C (97°F), while March presents much cooler conditions, starting at a minimum of 4°C (39°F) and averaging 15°C (59°F) with a peak of 28°C (83°F). Precipitation levels are significantly higher in March, with 277 mm (10.9 in) over 23 days, compared to September’s 130 mm (5.1 in) across 15 days. Additionally, March tends to be more humid, with a humidity level of 73%, compared to September’s 63%. For more detailed insights on March weather, check out Xi'an weather in March.
September and April present contrasting weather patterns, with September typically enjoying warmer temperatures. In September, the minimum temperature is around 15°C (60°F), averaging at 25°C (78°F), and may reach a high of 36°C (97°F). Conversely, April experiences cooler conditions, with temperatures ranging from a minimum of 6°C (43°F) to an average of 18°C (65°F) and a maximum of 30°C (86°F).
Precipitation levels also differ significantly between the two months. September sees about 130 mm (5.1 in) of rain over approximately 15 days, while April receives more substantial rainfall at 243 mm (9.6 in) across 21 days. Additionally, humidity is slightly higher in April at 70%, compared to 63% in September. For more detailed information on April weather, you can check Xi'an weather in April.
In comparing the weather of September and May, we can see notable differences in temperature and precipitation. September experiences warmer temperatures, with averages ranging from a minimum of 15°C (60°F) to a maximum of 36°C (97°F), while May is cooler, with temperatures ranging from 11°C (52°F) to 33°C (91°F). However, May sees significantly more rain, with a total precipitation of 219 mm (8.6 in) over 23 days compared to September's 130 mm (5.1 in) over 15 days. The humidity levels are also higher in May at 84%, compared to 63% in September. For more detailed information, you can check out Xi'an weather in May.
When comparing the weather in September and June, we see some notable differences. September features a temperature range that starts at a minimum of 15°C (60°F), averages 25°C (78°F), and can peak at 36°C (97°F). Precipitation levels are moderate, with about 130 mm (5.1 in) falling over 15 days, alongside a humidity level of 63%. In contrast, June has a slightly higher minimum temperature of 16°C (61°F) and a maximum of 33°C (91°F), with the same average of 25°C (78°F). However, June is significantly wetter, receiving 297 mm (11.7 in) of rain over 23 days, along with a higher humidity of 83%. For a more detailed look at June's weather specifics, you can check out Xi'an weather in June.
In July, the weather tends to be hotter and more humid compared to September, with minimum temperatures around 20°C (69°F) and an average of 27°C (81°F). In contrast, September experiences a wider temperature range, with minimums of 15°C (60°F) and an average of 25°C (78°F), making it somewhat cooler overall. Precipitation is also notable in both months, though July sees more rain (152 mm) over more days (19) compared to September's 130 mm over 15 days. Additionally, July's humidity peaks at a high 89%, which is considerably more oppressive than September's more moderate 63%. For more information, check out Xi'an weather in July.
In comparing the weather between September and August, September showcases a notable drop in minimum temperatures, with a minimum of 15°C (60°F) compared to August's 20°C (68°F). The average temperature for September is 25°C (78°F), slightly lower than August’s average of 27°C (81°F), yet both months experience maximum temperatures peaking at 36°C (97°F). Precipitation in September totals 130 mm (5.1 in) over 15 days, which is less in comparison to August's 152 mm (6.0 in) over 19 days. Additionally, September's humidity at 63% is significantly lower than the higher humidity levels of 87% observed in August. For more detailed weather insights, check out Xi'an weather in August.
In comparing the weather between September and October, we see a notable shift in temperatures and precipitation. September features warmer conditions, with average temperatures reaching 25°C (78°F) and highs soaring to 36°C (97°F). However, it's also a wetter month, accumulating 130 mm (5.1 in) of rainfall over 15 days and maintaining a humidity level of 63%. In contrast, October brings cooler temperatures, with averages dipping to 19°C (67°F) and maximums around 33°C (92°F). The month experiences significantly less rainfall, totaling 75 mm (3.0 in) over just 9 days, while humidity decreases slightly to 59%. For more details, visit Xi'an weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a high of 36°C (97°F), with an average of 25°C (78°F). The month experiences significant rainfall, totaling 130 mm (5.1 in) across about 15 days, coupled with a humidity level of 63%. In contrast, November sees much cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 27°C (82°F), resulting in an average of just 15°C (59°F). Precipitation decreases to 97 mm (3.8 in) over 11 days, and humidity slightly rises to 66%. For more detailed information, you can check Xi'an weather in November.
September weather is characterized by warm temperatures, with a minimum of 15°C (60°F) and an average of 25°C (78°F) reaching up to a hot 36°C (97°F). The month experiences significant precipitation, totaling 130 mm (5.1 in) over approximately 15 days, and maintains a humidity level of 63%. In contrast, December brings a substantial drop in temperatures, with a minimum of -2°C (29°F) and an average of just 9°C (49°F). The maximum temperature reaches a mild 24°C (75°F), and precipitation decreases to 61 mm (2.4 in) over about 11 days, while humidity rises slightly to 69%. For more detailed information, check out Xi'an weather in December.
As September rolls into Xi'an, the weather begins to shift, showcasing a delightful transition from the sweltering heat of summer. With temperatures peaking at 36°C, the month still maintains a comfortable average of 25°C, making it ideal for outdoor activities. While the humidity hovers around 63%, it feels more tolerable compared to the peak summer months, though occasional rainfall—spreading across 15 days—adds a refreshing touch. The notable 130 mm of precipitation helps to cool down the city, preparing it for the coming autumn. For a comprehensive insight into the ever-changing climate, check out Xi'an Climate.