Last updated: August 21, 2025
September in Yan'an, China offers a delightful transition from the warmth of summer, with maximum temperatures reaching around 30°C (86°F) and a comfortable average of 17°C (63°F). As the month progresses, expect cooler evenings, where temperatures can dip to a refreshing minimum of 6°C (43°F). This period sees moderate precipitation, totaling approximately 102 mm (4.0 in) over about 10 days, contributing to the lush greenery of the region. Coupled with a humidity level of 65%, visitors can anticipate a mix of mild days and refreshing, rain-soaked atmospheres, making it an enchanting time to explore Yan'an's rich heritage and natural beauty.
As September unfolds in Yan'an, the temperatures begin a gentle transition from the summer heat towards the cooler embrace of autumn. The month starts with a comfortable average temperature of 17°C (63°F), showcasing a pleasant balance between warm days and cooler nights. With minimums averaging around 6°C (43°F) and maximums reaching a mild 30°C (86°F), the weather invites outdoor activities while hinting at the forthcoming seasonal shift. This gradual decline from the sweltering heights of summer, peaking at nearly 37°C (99°F) in July and August, creates an inviting atmosphere for residents and visitors alike, as the vibrant landscapes start to reflect the subtler tones of fall.
In September, Yan'an experiences a significant precipitation level of 102 mm (4.0 in), marking a continuation of the monsoon-like conditions that began in the summer months. Although this is slightly lower than August's peak of 149 mm, it still contributes to a notable end-of-summer rainfall pattern, with rain spread over 10 days. This steady influx of moisture is crucial for the region, supporting agriculture as the growing season winds down. Compared to earlier months, such as July, which saw a high of 103 mm over 13 days, September strikes a balance, allowing for crucial hydration while not overwhelming the landscape, with fewer rainy days. The overall trend indicates a transition towards drier months ahead, as the region prepares for October’s expected decrease in precipitation to 76 mm (3.0 in).
In September, Yan'an experiences a refreshing humidity level of 65%, which is relatively moderate compared to the preceding months. This slight dip follows the summer's warmer embrace, characterized by higher humidity levels in July and August at 61% and 60%, respectively. As the city transitions into autumn, this September value marks a turn towards the more humid months ahead, with October set to rise to 75%. Overall, the humidity in Yan'an tends to fluctuate throughout the year, with winter months often showing increased levels, yet September maintains a comfortable balance that heralds the seasonal change.
As September arrives in Yan'an, China, the UV Index reflects a transition from the peak summer intensity to the autumn months. With a UV Index of 9, exposure is categorized as very high, requiring caution during outdoor activities, as the burn time is reduced to just 15 minutes. This marks a slight decrease from the extreme levels experienced in July and August, where the Index maintained a consistent 11. The trend indicates a gradual decline in UV exposure, but the need for sun protection remains essential. As fall approaches, outdoor enthusiasts should stay informed and plan accordingly. For more details on UV levels throughout the year, check out Yan'an UV Index.
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In Yan'an, China, September typically welcomes a generous 263 hours of sunshine, marking a gradual transition from summer's peak brightness. As the year unfolds, the city experiences a distinct progression in sunshine hours, with each month showcasing its unique character. After basking in the warmth of July's 333 hours, the sunshine begins to mellow in August and September, highlighting a natural rhythm of the seasons. The summer months display their vibrancy with over 300 hours of sun, while autumn starts to bring a gentle retreat towards shorter days. Despite the decrease in sunlight, September's warmth persists, inviting residents and visitors alike to enjoy outdoor activities before the cooler months set in. This trend not only reflects the shifting seasons but also encapsulates the beautiful balance of sunlight that Yan'an experiences throughout the year.
As September rolls into Yan'an, the likelihood of sunny weather dips to 41%, signaling a transition from the summer's more vibrant days. Compared to the previous months, such as July and August with their sunny chances of 52% and 49% respectively, September begins to usher in the cooler autumn air, leading to an increased cloud cover. This month is a part of a broader trend where the chance of bright skies decreases, culminating in October's more overcast expectations at 33%. As the year progresses, the return of sunnier weather is noted in November with 70%, hinting that while September may see less sunshine, the promise of brighter days is just around the corner.
In September, Yan'an experiences a shift as daylight begins to wane, offering about 12 hours of sunlight per day. This marks a gentle decline from the 14 hours enjoyed during the peak of summer in June, July, and August. As the days gradually shorten, the transition to autumn becomes increasingly palpable. Throughout the year, Yan'an showcases a progressive increase in daylight from January's 9 hours to May's 14 hours, before settling into a more stable rhythm that continues to decrease towards winter. The rhythmic ebb and flow of daylight not only highlights the changing seasons but also invites residents to savor the lingering warmth of early autumn before the days shorten further.
In September, the winds in Yan'an, China pick up slightly from the summer lull, averaging a gentle 2.5 m/s (6 mph). Following a few months of calm breezes in July and August, September brings a refreshing change. This marks a transitional phase, with wind speeds gradually increasing as autumn approaches. Historically, the wind has been more spirited in the spring and early summer months, peaking at 3.6 m/s (8 mph) in May. As the year progresses toward winter, the winds typically settle to a more subdued pace, suggesting that September serves as a critical bridge, hinting at the vigor of upcoming seasons while still cherishing the lingering warmth of summer.
Weather in Yan'an varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yan'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a mild 6°C (43°F) at night to a warm 30°C (86°F) during the day, accompanied by an average temperature of 17°C (63°F). This month also experiences relatively high humidity at 65% and consistent rainfall, with 102 mm (4.0 in) of precipitation over about 10 days. In contrast, January is characterized by much colder temperatures, with a minimum of -22°C (-8°F) and a maximum of just 11°C (52°F), resulting in an average of -4°C (25°F). There is significantly less precipitation in January, only 8 mm (0.3 in) over about 2 days, and humidity is slightly lower at 63%. For more specific insights into January weather, you can check Yan'an weather in January.
September and February present stark contrasts in weather. September boasts a temperate climate with average highs around 17°C (63°F) and maximum temperatures reaching as high as 30°C (86°F). This month sees a moderate amount of precipitation, totaling 102 mm (4.0 in) over about 10 days, coupled with a humidity level of 65%. In contrast, February brings frigid conditions, with temperatures plummeting to a minimum of -18°C (0°F) and an average of -1°C (31°F). Precipitation is significantly lower in February, amounting to just 12 mm (0.5 in) over 3 days, and humidity rises slightly to 71%. For more detailed insights into February weather, you can visit Yan'an weather in February.
In comparing the weather between September and March, we see notable contrasts. September typically offers milder conditions, with average temperatures ranging from a low of 6°C (43°F) to a high of 30°C (86°F), and a significant amount of precipitation totaling 102 mm (4.0 in) spread over 10 days. The humidity is also relatively moderate at 65%. In contrast, March presents cooler temperatures, with a minimum of -6°C (22°F) and an average high of 26°C (80°F). The precipitation is much lighter in March, with only 19 mm (0.8 in) over just 4 days, and a slightly higher humidity at 69%. For more specific insights on March weather, you can visit Yan'an weather in March.
In September, the weather tends to be warmer with average temperatures around 17°C (63°F), peaking at 30°C (86°F), while April experiences cooler temperatures with an average of 13°C (55°F) and a maximum of 31°C (88°F). Precipitation is more significant in September, totaling 102 mm (4.0 in) over about 10 days compared to April's 44 mm (1.7 in) over just 6 days. Additionally, humidity is slightly higher in April at 74%, compared to 65% in September, making the spring month feel a bit more muggy. For more detailed insights about April weather, check Yan'an weather in April.
In comparing the weather of September and May, one can observe notable differences in temperature and precipitation. September experiences a broader temperature range, with minimums dropping to 6°C (43°F) and maximums reaching 30°C (86°F), while May has a slightly cooler minimum of 2°C (36°F) and can peak at 33°C (92°F). Despite having more rain, with 102 mm (4.0 in) over approximately 10 days, September's average humidity is higher at 65%, compared to May’s lower humidity of 57% and significantly less precipitation of 41 mm (1.6 in) across 7 days. For more detailed information, you can check Yan'an weather in May.
September and June showcase notable differences in weather patterns. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). This month experiences higher precipitation levels, measuring 102 mm (4.0 in) over about 10 days. In contrast, June offers milder minimum temperatures of 8°C (47°F) and warmer highs of 34°C (93°F), leading to a much higher average temperature of 22°C (71°F). Additionally, June sees lower precipitation at 63 mm (2.5 in) over just 7 days. Interestingly, both months share a consistent humidity level of 65%. For a more detailed look at June weather, you can visit Yan'an weather in June.
In comparing the weather between September and July, notable differences in temperature and overall climate can be observed. September experiences cooler temperatures, with a minimum of 6°C (43°F) and an average of 17°C (63°F), while July is considerably warmer, with a minimum of 14°C (57°F) and an average of 24°C (75°F). The maximum temperatures in July can reach as high as 37°C (99°F), significantly surpassing September's max of 30°C (86°F). Additionally, while both months see similar amounts of precipitation (around 102-103 mm), July has slightly more rainy days at 13 compared to September's 10. The humidity levels are also similar, with September at 65% and July slightly lower at 61%. For a more detailed look at July weather in Yan'an, you can refer to this link: Yan'an weather in July.
In comparing the weather between August and September, notable differences emerge in temperature and precipitation levels. September experiences cooler temperatures, with a minimum of 6°C (43°F) and an average of 17°C (63°F), in stark contrast to August's milder range, which sees a minimum of 11°C (52°F) and an average of 22°C (71°F). The maximum temperature in September also reaches a modest 30°C (86°F), significantly lower than August's peak of 37°C (98°F). Additionally, while September brings about 102 mm (4.0 in) of precipitation over 10 days, August sees higher rainfall of 149 mm (5.9 in) across 12 days. Interestingly, humidity levels are slightly higher in September at 65%, compared to August's 60%. For more detailed information, you can check Yan'an weather in August.
In September, temperatures range from a cool 6°C (43°F) at night to a warm average of 17°C (63°F) during the day, reaching a peak of 30°C (86°F) on the hottest days. The month is relatively humid, with an average humidity of 65% and 102 mm (4.0 in) of precipitation over about 10 days. In contrast, October sees a more significant drop in temperatures, with nighttime lows dipping to -2°C (28°F) and a daytime average of just 10°C (50°F), despite maximum temperatures still reaching 26°C (79°F). October is slightly less rainy, with 76 mm (3.0 in) of precipitation over 8 days, but humidity rises to 75%. For more detailed insights into October's climate, visit Yan'an weather in October.
September and November present stark contrasts in weather conditions. In September, temperatures range from a mild minimum of 6°C (43°F) to a warm maximum of 30°C (86°F), with an average of 17°C (63°F). The month experiences significant precipitation of 102 mm (4.0 in) over about 10 days, contributing to a humidity level of 65%. In contrast, November sees much cooler temperatures, with a minimum of -10°C (14°F) and an average of just 4°C (39°F), although it can still reach a maximum of 18°C (64°F). Precipitation drops sharply to 19 mm (0.8 in) spread across only 3 days, while humidity rises to 74%. For more detailed information on November weather, you can explore Yan'an weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a mild 6°C (43°F) at night to a warm average of 17°C (63°F), peaking at a sweltering 30°C (86°F) during the day. This month also experiences significant precipitation, with about 102 mm (4.0 in) over roughly 10 days, and humidity levels hover around 65%. In stark contrast, December sees frigid conditions with nighttime lows plummeting to -19°C (-2°F) and an average temperature of -3°C (26°F), while daytime highs cap at a relatively mild 12°C (54°F). Precipitation is minimal, with only 3 mm (0.1 in) recorded and no significant rainy days, while humidity increases slightly to 73%. For more detailed information, you can visit Yan'an weather in December.
September in Yan'an marks a transition from the warm days of summer to the crisper air of autumn. With average temperatures around 17°C (63°F), the month is significantly cooler than the sweltering peak summer months, providing a refreshing respite. While September sees a moderate amount of rainfall, with 10 days experiencing precipitation, it is still less intense than the rainy season earlier in the year. Humidity levels hover around 65%, contributing to a pleasant atmosphere as nature begins to shift. This month is a delightful time to experience the evolving landscape and changing weather patterns in Yan'an. For a deeper understanding of the region's climate throughout the year, visit Yan'an Climate.