Last updated: August 21, 2025
In September, Xi'an experiences a transition from the heat of summer to more temperate conditions. With maximum temperatures peaking at 35°C (95°F) and an average around 23°C (73°F), the month still holds onto warmth despite cooler interludes. Nighttime temperatures can drop to a refreshing 14°C (58°F), offering a pleasant reprieve. The city sees about 141 mm (5.6 in) of rainfall over approximately 14 days, contributing to a humidity level of 70% that enhances the air's richness. This blend of warmth and moisture sets the stage for a vibrant and dynamic atmosphere in Xi'an during September, inviting both locals and travelers to embrace the city's cultural and historical charm amidst changing weather patterns.
In September, Xi'an experiences a delightful transition as the summer heat begins to fade. With minimum temperatures averaging around 14°C (58°F) and maximums reaching up to 35°C (95°F), the city enjoys pleasantly warm days that invite outdoor exploration. The average temperature hovers around 23°C (73°F), making it an ideal time for visitors to indulge in the rich cultural heritage and stunning historical sites. As humidity levels decrease, the gentle autumn breeze adds a refreshing touch, signaling the shift to cooler months ahead. This month perfectly balances warmth and comfort, providing an inviting atmosphere for both locals and travelers alike.
In September, Xi'an experiences a notable decrease in precipitation, with a total of 141 mm (5.6 in) across 14 rainy days. This marks a transition from the typically wetter summer months, where July and August saw precipitation peaks of 260 mm and 202 mm, respectively. As summer gives way to autumn, the rainfall pattern shifts, indicating a gradual reduction in overall moisture, as observed by the drop to just 89 mm in October. The combination of fewer rainy days and declining precipitation reflects the region's seasonal change, suggesting that September serves as a bridge between the lush, wet summer and the drier autumn ahead.
In Xi'an, China, September marks a notable transition in humidity levels as the summer's peak gradually gives way to the crispness of autumn. After experiencing high humidity in the preceding months—where levels soared to a peak of 89% in July—September sees a refreshing dip, with humidity falling to 70%. This decline sets the stage for October and November, where moisture levels slightly rise again but remain manageable. The trend reflects a gradual easing of the sultry summer conditions, making September a more comfortable time for residents and visitors alike to enjoy the city's rich cultural heritage against the backdrop of clearer skies.
As summer gives way to autumn, September in Xi'an presents a very high UV Index of 10, with a burn time of just 15 minutes. This slight dip from the relentless extremes of July and August, when the UV Index peaked at 13, signals a gradual reduction in solar intensity. However, residents and visitors should remain vigilant; even as the days get shorter, the sun can still deliver significant rays. The trend from April through September showcases an ongoing pattern of elevated UV levels, where protective measures are essential, regardless of the season. To stay informed about your UV exposure throughout the year, make sure to check the detailed forecasts on Xi'an UV Index.
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September in Xi'an, China, boasts an impressive 232 hours of sunshine, making it a delightful time to experience the city's rich history and vibrant culture. This month serves as a transition from the sweltering summer months of July and August, which enjoy peak sunshine with 297 and 309 hours, respectively. As autumn begins, September still holds onto significant daylight, yet it offers a reprieve from the intense heat. The gradual decline in sunshine hours begins with October, where the count drops to 192 hours, signaling the approach of winter. This trend highlights a beautiful change in Xi'an's climate, allowing residents and visitors alike to enjoy comfortable temperatures and radiant sunshine during the early fall.
As September rolls into Xi'an, a noticeable shift in weather patterns becomes evident, with the likelihood of sunny days soaring to 56%. This marks a significant increase compared to the preceding months, where the sun seemed to shy away, particularly in the spring. After a summer characterized by moderate sunshine, September offers a delightful opportunity for outdoor activities, as it stands out as one of the sunniest months of the year. With a backdrop of warm autumn hues, this transitional month invites both residents and visitors to bask in the sunshine before winter sets in, making it a perfect time to explore the rich cultural heritage of the region.
As summer transitions into autumn in Xi'an, China, September brings a gradual decline in daylight hours, with the sun shining for 12 hours each day. This slight reduction follows the peak of 13 hours that characterize the summer months of June, July, and August, showcasing a natural ebb as the days shorten with the approach of fall. Interestingly, this trend of diminishing daylight begins in earnest after May, where longer days begin to give way to the cooler, crisper air of autumn. As September progresses, residents can enjoy the last remnants of warm daylight before the days dwindle further to 11 hours in October, setting the stage for the shorter winter months ahead.
As September unfolds in Xi'an, the average wind speed hovers around 2.2 m/s (5 mph), maintaining a gentle breeze reminiscent of the summer's mild gusts. This slight uptick from the lower speeds seen in June and July suggests a subtle shift towards the more dynamic autumn months. Interestingly, the wind begins to gain momentum as the season progresses, with October showing a noticeable increase to 3.1 m/s (7 mph). Overall, September acts as a bridge between the calmer summer days and the brisk air of fall, offering a refreshing allure that beckons residents and visitors alike to enjoy the outdoors before the chill sets in.
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 present striking contrasts in weather. In September, temperatures range significantly, with a minimum of 14°C (58°F) and a maximum of 35°C (95°F), creating warm days suitable for outdoor activities. This month also experiences higher precipitation, averaging 141 mm (5.6 in) over about 14 days, accompanied by a humidity level of 70%. In contrast, January's climate is much cooler, featuring a minimum of -7°C (19°F) and a maximum of 18°C (65°F), leading to a chilly atmosphere with an average temperature of just 4°C (39°F). Precipitation is lighter in January, with only 64 mm (2.5 in) over 9 days, while humidity remains relatively stable at 71%. For more details, you can visit Xi'an weather in January.
September boasts a warmer climate, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 35°C (95°F), and an average of 23°C (73°F). In contrast, February experiences much cooler conditions, with temperatures varying from -3°C (26°F) to 26°C (78°F), averaging around 6°C (43°F). Additionally, September sees higher precipitation levels at 141 mm (5.6 in) over approximately 14 days, compared to February's 91 mm (3.6 in) over 12 days. Both months have relatively high humidity, with September at 70% and February slightly higher at 75%. For more details on February weather, check Xi'an weather in February.
September and March present distinctly different weather patterns. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (95°F), with an average of around 23°C (73°F). The month sees significant precipitation at 141 mm (5.6 in), occurring over 14 days, accompanied by a humidity level of 70%. In contrast, March experiences cooler temperatures, with a minimum of 3°C (37°F) and an average of 12°C (53°F), peaking at 29°C (84°F). Though it is slightly wetter, with 194 mm (7.6 in) of precipitation spread across 18 days, the humidity is notably higher at 86%. For more detailed insights into March weather, check out Xi'an weather in March.
September and April present contrasting weather patterns, highlighting the transitions between seasons. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (95°F), with an average of 23°C (73°F). This month experiences a moderate amount of precipitation at 141 mm (5.6 in) over 14 days, accompanied by a humidity level of 70%. In contrast, April sees cooler temperatures, with a range from 5°C (40°F) to 31°C (88°F), averaging 16°C (61°F). Although it has slightly more precipitation at 159 mm (6.3 in) over 17 days, the humidity is higher at 86%. These variations reflect the seasonal shifts evident in the climate of the region. For more details about April weather, you can check out Xi'an weather in April.
In September, the weather is typically warmer than in May, with average temperatures reaching 23°C (73°F) compared to May's 20°C (69°F). However, September experiences slightly higher maximum temperatures, peaking at 35°C (95°F), while May's max is 33°C (92°F). In terms of precipitation, May is wetter with 241 mm (9.5 in) falling over 17 days, compared to September's 141 mm (5.6 in) across 14 days. Moreover, May has higher humidity levels at 86%, compared to September's 70%. For more specific insights on the weather conditions during May, you can refer to Xi'an weather in May.
In comparing the weather of September and June, we notice several key differences. September typically experiences a range of temperatures with a minimum of 14°C (58°F) and a maximum of 35°C (95°F), averaging around 23°C (73°F). In contrast, June has slightly warmer temperatures with a minimum of 15°C (60°F) and a maximum of 34°C (93°F), averaging 24°C (75°F). Rainfall also varies significantly; September receives about 141 mm (5.6 in) of precipitation over 14 days, while June has a much higher total of 255 mm (10.0 in) over 18 days. Additionally, June's humidity is noticeably higher at 87%, compared to September's 70%. For a detailed look at June weather in Xi'an, you can check out Xi'an weather in June.
In September, the weather tends to be milder compared to July, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 35°C (95°F) and an overall average of 23°C (73°F). This month experiences less precipitation, totaling 141 mm (5.6 in) over 14 days, resulting in lower humidity levels at around 70%. In contrast, July sees higher temperatures, with a minimum of 18°C (65°F), an average of 27°C (81°F), and a peak of 37°C (99°F). July is also significantly wetter, with 260 mm (10.2 in) of rainfall distributed across 18 days and higher humidity at 89%. For more detailed weather information about July, you can check Xi'an weather in July.
September weather generally sees a slight cooling compared to August, with average temperatures dropping from 27°C (81°F) in August to 23°C (73°F) in September. The maximum temperatures also decrease, with September peaking at 35°C (95°F) compared to August's 36°C (98°F). Additionally, September experiences fewer rainy days, with 14 days of precipitation amounting to 141 mm (5.6 in), compared to August's 202 mm (8.0 in) over 18 days. Humidity levels are also lower in September at 70%, compared to August's higher humidity of 86%. For more details on August weather, check Xi'an weather in August.
In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (95°F), averaging around 23°C (73°F). The month is characterized by relatively high humidity at 70% and significant rainfall, totaling 141 mm (5.6 in) over 14 days. In contrast, October sees a noticeable drop in temperatures, with a minimum of 7°C (46°F) and an average of 16°C (62°F), while still reaching a maximum of 34°C (93°F). Rainfall decreases to 89 mm (3.5 in) over 11 days, and humidity remains similar at 72%. For more details on the weather in October, you can visit Xi'an weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a mild 14°C (58°F) at night to a scorching high of 35°C (95°F) during the day, with an average temperature of 23°C (73°F). The month experiences significant rainfall, totaling 141 mm (5.6 in) over about 14 days, accompanied by a humidity level of 70%.
In comparison, November sees much cooler conditions, with temperatures dropping to a minimum of 2°C (36°F) and peaking at a maximum of 28°C (83°F), averaging 12°C (54°F) overall. While precipitation decreases to 64 mm (2.5 in) over 12 days, humidity rises to 82%, contributing to a brisk atmosphere. For further details about November weather, you can check Xi'an weather in November.
September weather is characterized by warm temperatures, ranging from a minimum of 14°C (58°F) to a maximum of 35°C (95°F), with an average of 23°C (73°F). The month also experiences significant precipitation, totaling 141 mm (5.6 in) over approximately 14 days, contributing to a humidity level of 70%. In contrast, December brings much cooler weather, with temperatures dropping to a minimum of -6°C (22°F) and reaching a maximum of 19°C (66°F), while the average temperature sits at around 6°C (43°F). This month sees notably less precipitation, totaling only 47 mm (1.9 in) over 8 days, and a higher humidity level of 76%. For more details, visit Xi'an weather in December.
As summer transitions into autumn, September in Xi'an showcases a delightful shift in weather patterns compared to the hot, dry months preceding it. With a more moderate average temperature around 23°C (73°F), the heat starts to retreat, offering a pleasant reprieve. However, it's also marked by increased humidity and frequent rainfall, creating a lush atmosphere that breathes life into the surroundings. While the city experiences a considerable amount of precipitation, the combination of milder temperatures and refreshing rain makes September an ideal time for exploring the rich history and culture of Xi'an. For those curious about how this month fits into the broader context of the region, check out the detailed insights available at Xi'an Climate.