Last updated: August 21, 2025
September in Lanzhou, China, presents a diverse climate characterized by a maximum temperature reaching up to 31°C (87°F) and an average of 16°C (61°F), creating a pleasant warmth during the day. As temperatures can dip to a minimum of 6°C (42°F), layering is advisable for the cooler evenings. The month is marked by moderate precipitation, with about 70 mm (2.8 in) falling over 12 days, contributing to an 87% humidity level that enhances the lushness of the surrounding landscapes. This blend of conditions makes September an intriguing time to experience Lanzhou’s natural beauty and vibrant atmosphere.
As September arrives in Lanzhou, China, the city transitions into a more temperate climate, showcasing a welcome relief from the summer heat. With minimum temperatures hovering around 6°C (42°F) and averages settling at a comfortable 16°C (61°F), it provides an ideal backdrop for outdoor activities. The maximum temperatures can still reach 31°C (87°F), allowing for warm afternoons that linger long enough to enjoy the fading days of summer. Compared to the intense highs of July and August, September feels pleasantly mild, hinting at the cooler months ahead. This shift not only marks a change in temperatures but also signifies the arrival of autumn, painting the landscapes in rich hues and inviting locals and travelers alike to embrace the beauty of the season.
September in Lanzhou, China, brings a notable shift as the summer warmth begins to wane, resulting in 70 mm (2.8 in) of precipitation over 12 days. This month's rainfall is a significant drop from the peak of 125 mm (4.9 in) experienced in August, yet it remains the fifth wettest month of the year, demonstrating a steady pattern of moisture as the seasons transition. With water levels gradually decreasing from the torrential summer months, September serves as a prelude to the drier autumn, where average precipitation continues to decline in the following months, such as October's 48 mm (1.9 in). As the landscape shifts, the rhythmic cadence of rainfall becomes a comforting backdrop, blending seamlessly with the crispness in the air.
As summer transitions into autumn, September in Lanzhou, China experiences a noticeable uptick in humidity, reaching 87%—the highest for the month. This rise follows August's peak at 86%, suggesting a trend of increasing humidity as the seasons shift. Interestingly, after a gradual decline from the peak of 85% in early spring, the humidity begins to climb again from May's low of 78%, reflecting the region's unique climate patterns. Looking ahead, October maintains a high humidity level at 88%, indicating that the onset of fall does not bring immediate relief from the moisture-laden air. This consistent humidity underscores Lanzhou's transitional climate, where the lingering warmth of summer collides with the cooler autumn air, creating a rich tapestry of atmospheric conditions.
As September rolls in, Lanzhou experiences a notable drop in UV intensity compared to the scorching summer months, yet the sun remains strong with a UV Index of 10, categorizing it as very high. This indicates a burn time of just 15 minutes, requiring sun enthusiasts and outdoor adventurers to adopt protective measures. Following the extreme UV levels of summer, September reflects a slight easing, much like the transition to autumn. However, caution is still warranted, as lingering brightness may tempt individuals into prolonged sun exposure. With September marking the last month of very high UV conditions before UV levels dip further in October, it's a perfect time to enjoy the sun safely. For a comprehensive understanding of UV exposure in this city, visit Lanzhou UV Index.
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As the summer fades, September in Lanzhou, China, offers a delightful blend of warmth and brilliance, boasting 285 hours of sunshine. This marks a gentle decline from the sun-drenched days of July, which recorded an impressive 348 hours. While September’s sunshine is less than the peak summer months, it still enjoys a vibrant glow, especially in contrast to the cooler, shorter days ahead in October with just 267 hours. The transition into autumn is graceful, highlighted by clear skies and a more temperate climate, making it an inviting time for both locals and visitors to soak in the last rays of summer before the chill of winter begins to set in.
September in Lanzhou, China, offers a moderate chance of sunny weather, with a 47% likelihood of sunshine. This places it in a transitional phase, leaning slightly higher than the summer months of June and August but lower than the vibrant rays of January and November. After the intense heat of mid-summer, September brings a refreshing change, where the sun competes with the mellowing autumn hues. While it may not guarantee blue skies every day, this month presents a balanced opportunity to enjoy pleasant outdoor activities amid the shifting seasons.
As September rolls into Lanzhou, the daylight hours begin to gently wane, offering approximately 12 hours of light each day. This marks a gradual transition from the long, sun-kissed days of summer, where the city basked in 14 hours of daylight from June to August. The decline continues into October, as the days shorten, gradually retreating to the 11 hours experienced earlier in the year. This rhythm of daylight not only reflects the changing seasons but also paints a rich tapestry of natural beauty, inviting residents and visitors alike to savor the moderate September sunshine before the cooler months take hold.
As September arrives in Lanzhou, the wind begins to whisper a gentle refrain, with an average speed of 1.9 m/s (4 mph). This marks a slight dip in comparison to the summer months, highlighting a transitional period as the city shifts from the warm embrace of August's 2.1 m/s breezes. Notably, the overall trend demonstrates a gradual decrease in wind speed as the year progresses, with the calmest month, December, averaging just 1.5 m/s (3 mph). This ebbing of winds provides a serene backdrop for autumn, inviting residents and visitors alike to savor the changing seasons with a refreshing sense of tranquility.
Weather in Lanzhou varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lanzhou, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present notably contrasting weather conditions. In September, temperatures range from a mild minimum of 6°C (42°F) to a warm maximum of 31°C (87°F), with an average of about 16°C (61°F). The month typically experiences 70 mm (2.8 in) of precipitation over 12 days, coupled with high humidity at 87%. Conversely, January brings much colder temperatures, with minimums plunging to -19°C (-2°F) and maximums reaching only 13°C (55°F), averaging -5°C (23°F). Precipitation drops significantly to 6 mm (0.2 in) over just 2 days, and humidity is also lower, at 81%. For a more detailed look at January weather, you can visit Lanzhou weather in January.
September and February present very contrasting weather conditions. In September, temperatures range from a mild 6°C (42°F) at night to a warm 31°C (87°F) during the day, with an average of 16°C (61°F). This month also sees a higher level of precipitation, totaling 70 mm (2.8 in) over 12 days, and humidity sits at 87%, making it feel quite steamy. In stark contrast, February is characterized by much colder temperatures, with a minimum of -21°C (-5°F) and a maximum of 17°C (63°F), averaging -2°C (29°F). Precipitation drops significantly to just 7 mm (0.3 in) over only 2 days, and humidity is slightly lower at 85%. For more detailed insights on February conditions, you can check Lanzhou weather in February.
In September, Lanzhou experiences a broad range of temperatures, with minimums reaching 6°C (42°F) and maximums soaring up to 31°C (87°F), leading to an average temperature of 16°C (61°F). The month also sees relatively high humidity at 87% and receives about 70 mm (2.8 in) of precipitation over an average of 12 days. In contrast, March is considerably colder, with lows plummeting to -11°C (13°F) and highs only reaching 26°C (79°F), resulting in a much lower average temperature of 6°C (43°F). Precipitation is minimal during this month, totaling just 14 mm (0.5 in) over about 3 days and maintaining a slightly lower humidity level of 85%. For a detailed look at the climate, check out this link: Lanzhou weather in March.
When comparing the weather in September and April, we observe notable differences in temperature and precipitation patterns. September boasts a wider temperature range, with minimums around 6°C (42°F) and maximums reaching up to 31°C (87°F), leading to an average of 16°C (61°F). In contrast, April experiences cooler temperatures, where the minimum can dip to -6°C (21°F) while still matching September's maximum of 31°C (87°F), resulting in a lower average of 11°C (52°F). Additionally, September has higher precipitation at 70 mm (2.8 in) over 12 days, compared to April's 40 mm (1.6 in) over 9 days. Humidity is also slightly higher in September at 87% compared to April's 83%. For more information on April weather, you can check Lanzhou weather in April.
September and May present interesting contrasts in weather patterns. September experiences a wider temperature range, with minimums reaching 6°C (42°F) and maximums soaring to 31°C (87°F), while May typically sees slightly cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 32°C (90°F). Precipitation is more frequent in September, with an average of 70 mm (2.8 in) over 12 days, compared to May's 51 mm (2.0 in) over just 7 days. Additionally, September is slightly more humid at 87%, while May maintains a lower humidity level of 78%. For a more detailed look at May weather, you can visit Lanzhou weather in May.
In September, the weather features a broader range of temperatures, with a minimum of 6°C (42°F) and a maximum reaching 31°C (87°F), averaging around 16°C (61°F). This month experiences an average precipitation of 70 mm (2.8 in) over approximately 12 days, along with higher humidity levels at 87%. In contrast, June offers slightly warmer temperatures, with a minimum of 8°C (46°F) and a maximum of 32°C (91°F), averaging 20°C (67°F). The precipitation in June is less, totaling 58 mm (2.3 in) over about 9 days, and the humidity is lower at 80%. For a detailed look at the weather specifics for June, you can visit Lanzhou weather in June.
In comparing the weather patterns of September and July, a notable difference in temperature and humidity can be observed. September experiences a minimum temperature of 6°C (42°F) and an average of 16°C (61°F), while July starts at a higher minimum of 11°C (53°F) and boasts a warmer average of 22°C (72°F), reaching maximum highs of 31°C (87°F) and 36°C (97°F), respectively. Additionally, both months see a similar amount of precipitation, with September receiving 70 mm (2.8 in) over 12 days and July slightly higher at 81 mm (3.2 in) across 11 days. Interestingly, September has a higher humidity level at 87%, compared to July's 82%. For more information on July weather specifics, you can visit Lanzhou weather in July.
In comparing the weather of September and August, September generally experiences cooler temperatures, with a minimum of 6°C (42°F) and a maximum of 31°C (87°F), while August boasts slightly warmer conditions, featuring a minimum of 10°C (50°F) and reaching up to 35°C (95°F). The average temperature in September is around 16°C (61°F), notably lower than August's average of 20°C (68°F). Additionally, September sees slightly less precipitation, with 70 mm (2.8 inches) over 12 days, compared to August's heavier rainfall of 125 mm (4.9 inches) over 13 days. Humidity levels remain quite similar in both months, with September at 87% and August slightly lower at 86%. For a detailed look at August's climate, you can check out Lanzhou weather in August.
September and October show a distinct transition in weather patterns. In September, temperatures range from a mild 6°C (42°F) at night to a warm maximum of 31°C (87°F) during the day, with an average of 16°C (61°F). Although it experiences higher precipitation at 70 mm (2.8 in) over 12 days, humidity remains high at 87%. In contrast, October brings cooler temperatures, with a minimum of -1°C (30°F) and an average of only 9°C (48°F). The maximum temperature reaches 27°C (80°F), while precipitation decreases to 48 mm (1.9 in) over 9 days, accompanied by slightly higher humidity at 88%. For more specifics on October weather, consult Lanzhou weather in October.
September and November present stark contrasts in weather conditions. September typically experiences milder temperatures, with a minimum of 6°C (42°F) and an average high of 31°C (87°F), while November sees a drastic drop, with lows plunging to -13°C (10°F) and an average of just 2°C (36°F). Precipitation is more frequent in September, occurring on 12 days and totaling 70 mm (2.8 in), while November is much drier, with only 12 mm (0.5 in) over just 3 days. Humidity levels remain relatively stable, at around 87% in September and 86% in November. For more detailed information, you can check Lanzhou weather in November.
September and December present contrasting weather patterns, illustrating the shift from late summer to winter. In September, temperatures range from a mild minimum of 6°C (42°F) to a warm maximum of 31°C (87°F), with an average of 16°C (61°F). The month experiences relatively high humidity at 87% and a moderate amount of rainfall, totaling 70 mm (2.8 in) over 12 days. In stark contrast, December brings chilling temperatures, dipping to a minimum of -18°C (1°F) and reaching a maximum of 12°C (54°F), with an average of -4°C (25°F). This month sees only 5 mm (0.2 in) of precipitation on just 1 day, along with lower humidity levels at 78%. For more detailed information, you can visit Lanzhou weather in December.
In September, Lanzhou experiences a delightful transition as summer formally gives way to autumn. Daytime temperatures can still soar to a maximum of 31°C, blending warmth with the crispness of the season. The average temperature of 16°C brings a refreshing contrast, especially with the cooler nights dipping to around 6°C. While the humidity peaks at 87%, frequent sporadic rain, totaling about 70 mm, adds to the dynamic climate, making it distinct from the drier summer months. This month marks a period of rich atmospheric change, perfect for embracing outdoor adventures and exploring the vibrant landscapes. To learn more about how Lanzhou's weather varies throughout the year, check out Lanzhou Climate.