Last updated: August 21, 2025
September in Chang'an, China showcases a dynamic weather pattern, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 35°C (95°F), averaging around 21°C (70°F). This transitional month marks the shift from summer heat to cooler autumn days, characterized by high humidity levels of 78%. Rainfall is notable, with a total precipitation of 174 mm (6.8 in) spread over 13 days, enriching the landscape and contributing to the vibrant seasonal changes. Visitors can expect a blend of warm days and refreshing showers, perfect for exploring the city’s rich history and scenic vistas.
In September, Chang'an, China experiences a comforting transition as summer wanes, with temperatures displaying a pleasant range. The minimum temperature hovers around 10°C (51°F), while the **average climbs to a comfortable 21°C (70°F), making this month ideal for outdoor activities and explorations. With a maximum reaching up to 35°C (95°F), the days remain warm but begin to cool as autumn approaches. This gradual decline from the sweltering heat of the preceding summer months signifies a shift towards more enjoyable, moderate conditions, perfect for experiencing the rich cultural tapestry of the region.
In September, Chang'an experiences a notable surge in precipitation, with 174 mm (6.8 in) of rain falling over 13 days. This substantial increase marks a peak in the region's annual rainfall, reflecting the transition from the hot, humid summer towards the cooler autumn months. The upward trend in precipitation from previous months—where amounts gradually rose from 18 mm in January to 125 mm in August—culminates in September, signaling a shift in climate dynamics as the city prepares for the dryer, cooler spell of October. This month stands out not only for its volume of rain but also for the frequency of precipitation days, which sees an increase, setting a backdrop of lushness before the fall.
In September, Chang'an, China experiences a moderate humidity level of 78%, marking a slight decline from the summer months. Throughout the year, humidity fluctuates significantly, peaking in the colder months of January and February at 70% and 80% respectively, then reaching its zenith in October at 85%. Interestingly, as the seasons transition, the humidity levels generally taper off from the high of 83% in March to relatively drier conditions in May at 68%. This pattern suggests that while Chang'an experiences its highest humidity during the winter and early autumn, September offers a brief reprieve before the onset of the wetter autumn months, fostering a comfortable ambiance for residents and visitors alike.
As September unfolds in Chang'an, China, the UV Index remains notably high at 9, marking it within the very high exposure category. This slight dip from the peak summer months indicates that sun protection is still essential, with a burn time of just 15 minutes. This trend reflects a gradual transition from the intense UV levels experienced in July and August, where the index consistently reached its maximum of 10. As autumn approaches, residents and visitors alike should remain vigilant to safeguard their skin against the sun’s intensity. For more detailed information about UV levels throughout the year, check out Chang'an UV Index.
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September in Chang'an, China, brings a gentle transition from the summer's vibrant warmth to the crispness of autumn. With 239 hours of sunshine, this month marks a noticeable dip from the peak sunlight of July and August, which basked in over 320 hours each. However, September's sunshine is still a generous offering, outshining many of its cooler counterparts in the months ahead, with October's average dropping to 221 hours. This pattern illustrates a seasonal ebb and flow; even as daylight wanes, September retains a warmth reminiscent of summer, inviting residents and visitors alike to savor the lingering rays before the chill sets in.
In September, Chang'an, China enjoys a 44% chance of sunny weather, marking a slight improvement compared to the summer months, where the likelihood hovered around the mid-30s. This month acts as a transitional period, as the sun begins to make a more pronounced appearance again after the relatively gloomy days of late spring and early summer. While the chances remain lower than in the lively autumn months of November and December, September still offers a favorable opportunity to savor the sun before the cooler temperatures set in. As fall approaches, residents and visitors alike can look forward to clearer skies and pleasant outdoor experiences during this turning point in the year.
As the seasons shift in Chang'an, China, September offers a gentle decline in daylight, with approximately 12 hours illuminating the sky. This month marks a transition from the long, sun-drenched days of summer, which peak at 14 hours in June and July, to the shorter, cooler days of autumn. Notably, the daylight duration begins to taper off after August's 13 hours, hinting at the approaching winter months. March, with its 11 hours, and April, which extends to 13 hours, suggest a gradual lengthening of daylight as spring emerges, while the steady decrease from October's 11 hours to December's minimal 9 hours emphasizes the cyclical nature of light throughout the year. Each month elegantly intertwines, revealing the rhythm of time and nature in this historic locale.
In September, the winds in Chang'an, China, offer a gentle embrace, with an average speed of 1.8 m/s (approximately 4 mph). This subtly aligns with the month's characteristic tranquility, showcasing a slight moderation compared to the more variable winds of earlier months. As summer gives way to the crispness of autumn, the wind tends to linger in a state of calm, reminiscent of the seasonal transition. Notably, the wind speed remains consistent with June and August, highlighting a soothing norm before reaching the brisker pace that arrives in later autumn months. Overall, September's winds serve as a gentle reminder of the shifting seasons, providing a serene backdrop to the vibrant cultural tapestry of Chang'an.
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.
In September, the weather is typically warm and variable, with temperatures ranging from a chilly 10°C (51°F) at night to a hot 35°C (95°F) during the day and an average of 21°C (70°F). This month also experiences significant rainfall, with 174 mm (6.8 in) spread over 13 days, contributing to a high humidity level of 78%. In stark contrast, January brings much colder conditions, with temperatures plummeting to a minimum of -15°C (6°F) and averaging just 1°C (35°F), peaking at a milder 15°C (59°F). Precipitation is notably low in January, with only 18 mm (0.7 in) occurring over just three days, and humidity levels slightly lower at 70%. For more detailed information on January weather, visit Chang'an weather in January.
September and February exhibit stark contrasts in weather. In September, temperatures range from a mild 10°C (51°F) at night to a warm 35°C (95°F) during the day, with an average of 21°C (70°F). The month sees significant rainfall, with 174 mm (6.8 in) spread over approximately 13 days and a relative humidity of 78%. In contrast, February experiences much cooler temperatures, with a minimum of -13°C (9°F) and a maximum of 24°C (76°F), averaging just 5°C (41°F). Precipitation is minimal at 21 mm (0.8 in) over only 3 days, and humidity remains slightly higher at 80%. For more detailed insights into February weather, visit Chang'an weather in February.
September and March present contrasting weather patterns, each with its unique characteristics. In September, the temperatures are significantly warmer, ranging from a minimum of 10°C (51°F) to a maximum of 35°C (95°F), accompanied by an average temperature of 21°C (70°F). This month also sees considerable precipitation, with 174 mm (6.8 in) falling over 13 days, and a moderate humidity of 78%.
In contrast, March experiences much cooler weather, with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 28°C (83°F), and an average of only 11°C (53°F). Precipitation is notably less in March, at just 38 mm (1.5 in) over 6 days, with slightly higher humidity levels at 83%. For more detailed information on March weather, you can check Chang'an weather in March.
In comparing the weather of September and April, September typically experiences warmer temperatures, with averages around 21°C (70°F) and maximums reaching up to 35°C (95°F). In contrast, April's temperatures are cooler, averaging 16°C (62°F) and peaking at 33°C (92°F). Furthermore, September sees significantly more rainfall, totaling 174 mm (6.8 in) over about 13 days, compared to April's lighter precipitation of 57 mm (2.2 in) over 8 days. Both months display high humidity, but September's humidity is slightly lower at 78% compared to April's 81%. For more detailed insights, you can check Chang'an weather in April.
In comparing the weather of September and May, both months share similar average temperatures of around 21°C (70°F), making them comfortable and pleasant. However, September experiences a wider temperature range, with minimums dropping to 10°C (51°F) and maximums reaching up to 35°C (95°F), while May's temperatures range from a slightly lower minimum of 9°C (48°F) to a high of 35°C (96°F). September is also significantly wetter, receiving 174 mm (6.8 in) of precipitation across 13 days, compared to May’s 65 mm (2.6 in) over just 7 days. Additionally, September's humidity is higher at 78%, whereas May has a more moderate level of 68%. For more detailed insights on May weather, visit Chang'an weather in May.
Comparing the weather in September and June reveals some notable differences. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 35°C (95°F), with an average of 21°C (70°F). The month also experiences higher precipitation, totaling 174 mm (6.8 in) over 13 days, and humidity levels are relatively high at 78%.
In contrast, June offers warmer temperatures, with a minimum of 13°C (56°F) and a maximum of 37°C (100°F), averaging around 25°C (77°F). It sees less precipitation at 124 mm (4.9 in) over 9 days, and slightly lower humidity levels at 74%. For more detailed insights into June weather, you can visit Chang'an weather in June.
In comparing the weather between September and July, we see notable differences in temperature and precipitation. September experiences a broader temperature range, with minimums of 10°C (51°F) and maximums reaching 35°C (95°F), offering a more moderate average temperature of 21°C (70°F). In contrast, July is notably warmer, with minimum temperatures of 17°C (63°F) and highs soaring up to 40°C (104°F), resulting in a higher average of 27°C (81°F). Precipitation is also more prominent in September, with 174 mm (6.8 in) falling over 13 days, compared to July's 123 mm (4.8 in) across 10 days. Humidity levels are similar, with September slightly higher at 78% compared to July's 76%. For more details on July weather, you can visit Chang'an weather in July.
In comparing the weather between September and August, September tends to be cooler and more humid. With minimum temperatures dropping to 10°C (51°F) and an average of 21°C (70°F), September offers a noticeable contrast to August, which boasts milder minimum temperatures around 15°C (59°F) and a warmer average of 26°C (80°F). Additionally, September experiences more precipitation, totaling 174 mm (6.8 in) over 13 days, compared to August's 125 mm (4.9 in) across 11 days. This shift results in a higher humidity level in September at 78%, compared to August’s 72%. For more detailed insights on August weather, you can check Chang'an weather in August.
September experiences warmer temperatures compared to October, with daily averages peaking at 21°C (70°F) and highs reaching up to 35°C (95°F). The month sees significant rainfall, totaling 174 mm (6.8 in) over 13 days, and humidity levels hover around 78%. In contrast, October brings cooler weather, with average temperatures dropping to 14°C (58°F) and maximums around 29°C (85°F). Precipitation decreases to 90 mm (3.5 in) over 12 days, while humidity rises slightly to 85%. For more details on what to expect during October, you can visit Chang'an weather in October.
In September, the weather is typically warm with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 35°C (95°F) and an average of 21°C (70°F). The month experiences significant precipitation, totaling 174 mm (6.8 in) over 13 days, alongside a humidity level of 78%. In contrast, November brings cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 24°C (75°F), averaging around 9°C (48°F). Precipitation in November drops markedly to just 28 mm (1.1 in) over 6 days, and humidity increases slightly to 82%. For more details, you can visit Chang'an weather in November.
In September, the weather is significantly warmer, with temperatures ranging from a cool 10°C (51°F) at night to a hot 35°C (95°F) during the day, and an average temperature of 21°C (70°F). This month also experiences considerable rainfall, with 174 mm (6.8 in) of precipitation spread over 13 days, combined with a humidity level of 78%. In stark contrast, December brings a much colder climate, where temperatures drop dramatically, ranging from a chilling -8°C (18°F) to a mild 15°C (59°F), with an average temperature of just 2°C (37°F). Precipitation is minimal in December, totaling only 9 mm (0.4 in) over just 2 days, and the humidity remains high at 80%. For more detailed information about December weather, you can visit Chang'an weather in December.
As September unfolds in Chang'an, the weather marks a notable transition from the sweltering heat of summer to the mild embrace of autumn. Daytime temperatures can still reach upwards of 35°C, but the evenings bring a refreshing coolness, often dipping to around 10°C. This month also witnesses an increase in precipitation, with frequent rain that contributes to the region’s lush landscapes. The humidity hovers at a relatively high 78%, making those warm days feel more intense. Overall, September serves as a bridge between seasons, offering a mix of lingering warmth and the welcoming chill of fall. For a deeper understanding of what to expect throughout the year, feel free to explore Chang'an Climate.