Last updated: August 21, 2025
In September, Chang'an, China, experiences a delightful transition into autumn, with average temperatures around 23°C (74°F). Daytime highs can reach a sizzling 35°C (96°F), while nighttime lows dip to a refreshing 14°C (57°F). However, this month also brings an increased chance of rain, with precipitation amounting to 123 mm (4.8 in) over approximately 12 days, coupled with a humidity level of about 75%. Visitors can expect a mix of sunny and rainy days, making it essential to pack accordingly for both warmth and moisture.
In September, Chang'an experiences a delightful shift as summer gives way to the approach of autumn. With temperatures ranging from a minimum of 14°C (57°F) to a warm maximum of 35°C (96°F), this month strikes a perfect balance, making it one of the most pleasant times to visit. The average temperature of 23°C (74°F) provides a comfortable backdrop for exploring the city’s rich heritage and vibrant culture. Compared to the sweltering heat of July and August, September brings a welcome respite, making outdoor activities enjoyable. As the month progresses, the hint of cooler weather begins to permeate the air, signaling the transition into autumn while still retaining the warmth that lingers from summer.
In September, Chang'an experiences a notable decline in precipitation, with 123 mm (4.8 in) of rain over the month, down from the torrential downpours of the preceding summer months. This reflects a transition as the city shifts from the wettest period, June and July, which see 333 mm and 290 mm, respectively. With 12 rainy days, September offers a reprieve from the more frequent storms of summer, while still nourishing the landscape as it begins to cool. The overall precipitation trend shows a tapering off as fall approaches, setting the stage for the drier months ahead, particularly October, which averages only 35 mm (1.4 in) of rainfall. Such variations emphasize the shifting patterns of Chang'an's climate, where the balmy summer yields to the crispness of autumn.
In September, Chang'an, China, experiences a noticeable dip in humidity, averaging 75%. This marks a slight decrease from the summer months, where levels peak at 90% in July and hover around 88% in August. However, September's humidity remains elevated compared to the cooler months that follow; October sees a modest rise to 76% and is accompanied by a gradual transition towards the drier winter air. This relenting of the summer's saturation reflects a seasonal shift, making September a unique time when the lingering warmth meets a refreshing reduction in humidity, offering a brief but welcome reprieve.
In September, the UV Index in Chang'an, China, registers at 10, placing it in the very high exposure category. This slight decline from August's extreme level of 12 signifies a transition as summer gives way to autumn. Even though the burn time increases to 15 minutes, it's essential to remain vigilant about sun protection, especially during outdoor activities. As autumn approaches, the UV Index begins to decrease, hinting at less intense sun exposure ahead, yet caution is still advised. For more detailed information on UV levels, check out Chang'an UV Index.
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As summer gently transitions into autumn, September in Chang'an, China, boasts a delightful 255 hours of sunshine, maintaining a warm glow following the sun-drenched days of August, which recorded an impressive 303 hours. This month marks a slight decline in sunlight compared to its predecessor, yet it remains robust when viewed within the context of the year's progression. The monthly sunshine hours rise steadily from January's 149 hours to a peak in July, indicating a vibrant increase throughout the year. Following September, a gradual decrease unfolds towards the colder months, reflecting the seasonal shift. Nevertheless, the warmth of September's sun offers a beautiful interlude before the cooler tones of autumn fully set in.
In Chang'an, China, September marks a notable resurgence in sunny weather after the summer months. With a 51% chance of sunshine, it mirrors the winter months of January and November, suggesting a seasonal shift towards clearer skies. This increase comes as a delightful departure from the relatively gloomy summer months, where chances dwindle to their lowest in July. Interestingly, September stands out not just as a transitional month, but as a promising time for outdoor activities. As the warmth of summer fades, and autumn begins to take hold, residents and visitors alike can revel in the delightful balance of sun and comfortable temperatures.
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 wind begins to whisper softly, averaging a gentle speed of 1.8 m/s (4 mph). This slight increase from the calm of August indicates a subtle shift, as the air grows crisper with the onset of fall. Analyzing the year, we see that July showcases the strongest gusts at 2.3 m/s (5 mph), likely indicative of summer’s liveliness, while June lingers at the bottom with its 1.5 m/s (3 mph). Despite these fluctuations, September maintains a consistent breeze similar to the preceding spring months, heralding the transition into a new season. As cooler nights set in, the winds of Chang'an remind us of nature's rhythm, a prelude to the fresh air that October will usher in at 2.1 m/s (5 mph).
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 stark contrasts in weather. In September, temperatures range from a mild 14°C (57°F) at night to a scorching 35°C (96°F) during the day, accompanied by an average of 23°C (74°F) and a high level of humidity at 75%. The month experiences substantial rainfall, with 123 mm (4.8 in) over approximately 12 days. Conversely, January brings much colder temperatures, dipping to a minimum of -14°C (8°F) and only reaching a maximum of 21°C (70°F), resulting in a much cooler average of 4°C (40°F). Precipitation is less frequent in January, totaling 73 mm (2.9 in) over about 10 days, and the humidity slightly decreases to 70%. For more details on January weather, you can check Chang'an weather in January.
September and February present stark contrasts in weather, highlighting the transition from late summer to winter. In September, temperatures range from a minimum of 14°C (57°F) to a maximum of 35°C (96°F), with an average of 23°C (74°F), accompanying high humidity at 75%. Despite the warmth, the month sees significant rainfall, accumulating 123 mm (4.8 in) over 12 days. In contrast, February experiences much cooler conditions, with temperatures dipping as low as -5°C (24°F) and peaking at 24°C (75°F), averaging just 6°C (43°F). Rainfall is lighter at 82 mm (3.2 in) over the same number of days, and humidity remains relatively stable at 73%. For more details, you can visit Chang'an weather in February.
September and March exhibit contrasting weather patterns, with September being considerably warmer than March. In September, temperatures range from a minimum of 14°C (57°F) to a maximum of 35°C (96°F), while March sees much cooler temperatures with a minimum of -1°C (30°F) and a maximum of 28°C (83°F). Precipitation is notable in both months, with September receiving 123 mm (4.8 in) over 12 days and March experiencing slightly more at 154 mm (6.0 in) across 15 days. Humidity levels are also higher in March at 82%, compared to September’s 75%. For more detailed information about March weather in Chang'an, visit Chang'an weather in March.
In comparing the weather of September and April, significant contrasts emerge in temperature and humidity. September boasts a much warmer average temperature of 23°C (74°F), peaking at a sweltering 35°C (96°F), while April's temperatures are notably cooler, with an average of 16°C (62°F) and a maximum of 31°C (89°F). Precipitation levels are similar, with both months seeing around 123-127 mm of rain over approximately 12 days. However, humidity is higher in April at 86%, compared to September's 75%, contributing to a more humid atmosphere during the spring month. For a closer look at what to expect, you can check out Chang'an weather in April.
In comparing the weather conditions between September and May, September generally presents warmer temperatures, with averages around 23°C (74°F) and highs reaching 35°C (96°F), while May's temperatures range from a minimum of 9°C (48°F) to an average of 21°C (70°F), peaking at 34°C (94°F). However, May experiences higher humidity at 85% compared to September's 75%, which can make it feel warmer. Additionally, May receives more precipitation, totaling 177 mm (7.0 in) over 14 days, contrasted with September's 123 mm (4.8 in) over 12 days. For more detailed information on May weather, you can refer to Chang'an weather in May.
When comparing the weather in September and June, we can observe some notable differences. September generally experiences a slightly wider temperature range, with minimums around 14°C (57°F) and maximums reaching 35°C (96°F), while June has a minimum of 13°C (55°F) and a maximum of 34°C (94°F). The average temperatures are comparable, with September averaging 23°C (74°F) and June averaging 24°C (76°F). However, September tends to have more moderate precipitation, totaling 123 mm (4.8 in) over 12 days, compared to June's significantly higher 333 mm (13.1 in) over 18 days. Additionally, humidity levels are higher in June at 85%, compared to 75% in September. For more detailed insights, you can check Chang'an weather in June.
The weather in September tends to be milder compared to the sweltering heat of July. While September features an average temperature of 23°C (74°F) with a maximum of 35°C (96°F), July sees hotter averages with a minimum of 19°C (66°F) and peaking at 39°C (103°F). In terms of precipitation, September has 123 mm (4.8 in) over 12 days, significantly less than July's 290 mm (11.4 in) spread across 18 days. Humidity levels drop slightly in September to 75%, compared to the higher 90% experienced in July, making September’s weather feel more comfortable overall. For more details on July's climate, you can check Chang'an weather in July.
In comparing the weather between August and September, September experiences slightly cooler temperatures with a minimum of 14°C (57°F) and an average of 23°C (74°F), while August boasts warmer temperatures, starting at a minimum of 16°C (61°F) and averaging 28°C (82°F). August also hits a higher maximum temperature of 37°C (98°F), compared to September’s maximum of 35°C (96°F). Additionally, September sees a decrease in precipitation, with 123 mm (4.8 in) over 12 days, while August has more rain at 154 mm (6.1 in) over 14 days. Furthermore, humidity levels are notably higher in August at 88%, compared to September's 75%. For a detailed look at the climatic conditions, you can check Chang'an weather in August.
September and October present a notable shift in weather patterns. In September, temperatures range from a mild 14°C (57°F) at night to a warm average of 23°C (74°F) and can peak at a scorching 35°C (96°F). This month also sees significant rainfall, with 123 mm (4.8 in) over 12 days, contributing to high humidity levels at 75%. Conversely, October experiences cooler temperatures, as the minimum drops to 5°C (42°F) and the average settles around 17°C (64°F), while still allowing for high daytime peaks of 35°C (95°F). Rainfall decreases dramatically to 35 mm (1.4 in) over just 7 days, with humidity slightly rising to 76%. For more detailed information about conditions specifically in October, check out Chang'an weather in October.
In September, the weather is warm and often quite humid, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 35°C (96°F) and an average of 23°C (74°F). It also experiences significant precipitation, with 123 mm (4.8 in) falling over approximately 12 days. In contrast, November brings much cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 26°C (79°F), averaging around 12°C (54°F). Rainfall decreases considerably to 47 mm (1.8 in) over just 9 days, while humidity rises slightly to 84%. For more detailed information, you can check Chang'an weather in November.
September weather is characterized by significantly warmer temperatures, with daily averages around 23°C (74°F) and maximums reaching up to 35°C (96°F). In contrast, December brings a marked chill, with average temperatures plummeting to 6°C (43°F), and minimums dropping to -6°C (22°F). While September experiences more rainfall, with 123 mm over 12 days, December sees less precipitation at 60 mm across 9 days. Humidity remains relatively high in both months, but slightly increased in December at 77%. For a detailed look at December weather, you can visit Chang'an weather in December.
As September settles in Chang'an, the weather begins to shift, showcasing a unique blend of warm days and cool evenings. With an average temperature hovering around a comfortable 23°C (74°F), the month offers a refreshing contrast to the heat of summer. Even though rainfall occurs on roughly 12 days, contributing to a total of 123 mm, the humidity levels make the air feel a bit thicker, reminding us that the transition to autumn is underway. This intriguing balance between warm and moist conditions makes September a distinct time of year, setting it apart from both the scorching summer and the chillier fall months. For those interested in exploring more about Chang'an's climate throughout the year, take a look at the details in Chang'an Climate.