Last updated: August 21, 2025
In September, Longmen, China experiences a warm and humid climate, with temperatures ranging from a maximum of 36°C (97°F) to a minimum of 16°C (61°F), resulting in an average temperature of 25°C (77°F). This month sees 104 mm (4.1 in) of rainfall over approximately 13 days, contributing to the overall humidity level of 61%. Visitors can expect a mix of sunny days and occasional rain, making it essential to dress for warmth while also being prepared for wet weather.
In September, Longmen welcomes a delightful shift in temperatures as summer begins to wane. With a minimum temperature of 16°C (61°F) and an average of 25°C (77°F), the days remain pleasantly warm, while evenings bring a refreshing coolness. As the month progresses, the maximum temperature peaks at a striking 36°C (97°F), echoing the lingering warmth of August. This transition ushers in a comfortable atmosphere ideal for outdoor activities, making it a perfect time for visitors to explore the region before the crispness of autumn sets in. Overall, September’s climate offers a harmonious blend of warmth and refreshing breezes, paving the way for the changing seasons ahead.
In September, Longmen, China experiences a notable shift in precipitation patterns, receiving 104 mm (4.1 in) of rainfall over 13 days. This marks a decrease from the deluges of June and August, which recorded 322 mm and 211 mm respectively. The rain during September, while significant, signals the transition towards drier months ahead, with October averaging just 55 mm (2.2 in) across 8 days. As summer's excess gives way to autumn's balance, September acts as a pivotal bridge, showcasing a blend of lingering moisture while hinting at a gradual retreat from the wet season's peak.
In September, Longmen, China, experiences a noticeable drop in humidity, with levels at 61%, the lowest since January. This decline marks a transition from the sweltering and humid summer months, where July peaks at an impressive 87%, to a more moderate atmosphere as autumn approaches. The month of September serves as a refreshing pause after the high summer humidity, creating a more comfortable environment for residents and visitors alike. As the year progresses into October, humidity remains similarly low at 62%, suggesting that the trend of decreasing moisture continues, paving the way for the drier and cooler months ahead.
In September, Longmen, China, experiences a UV Index of 12, categorized as extreme, with a burn time of just 10 minutes. This marks a slight decrease from the peak UV Index of 13 seen during the summer months of June through August, yet it remains a critical time for sun protection. The trend from spring through fall indicates consistently high UV levels, underscoring the importance of taking precautions during outdoor activities. As the year progresses towards October, the UV Index drops to 10, signaling a transition to slightly lower exposure risks. For more detailed insights on UV levels throughout the year, visit Longmen UV Index.
UV Risk Categories
September in Longmen, China, ushers in a splendid transition as daylight hours remain abundant, totaling 274 hours of sunshine. This month stands out as a continuation of the summer's glow, echoing the impressive 303 hours seen in July and 294 hours in August. The sun-drenched days of September signal a gradual shift toward autumn while still retaining a vibrant warmth reminiscent of summer's peak. Although there’s a slight dip from August, the sunshine hours remain significantly higher than in the colder months, such as January’s mere 191 hours. This reflects a broader trend where spring and summer months bask in the glory of longer days, making September an enticing bridge to the crispness of fall while still celebrating the lingering warmth of the summer sun.
In Longmen, China, September offers a refreshing turn of events in the weather spectrum, with a 53% chance of sunny days. This aligns favorably with the sunnier months earlier in the year, particularly January and February, which boast higher probabilities of clear skies at 71% and 53%, respectively. However, as the region transitions into fall, the likelihood of bright and sunny days dips in the following months, especially notable in June and July, where chances plummet to just 7% and 27%. September stands out as a month where the sun can still grace the landscape, making it an appealing time for outdoor activities as the energy of summer begins to wane.
As September unfolds in Longmen, China, the daylight duration holds steady at 12 hours, reflecting a transition in the seasonal rhythm. Following the bright, long days of summer, which reach their peak in June and July, September signals a gentle decline, aligning with the onset of autumn. This month marks a convergence between the extended daylight of summer and the shorter days that will soon accompany October. The consistent 12-hour daylight in September provides a harmonious balance, encouraging outdoor activities while hinting at the coming cooler months. This gradual decrease from summer's brightness to autumn's embrace showcases the natural ebb and flow of daylight throughout the year, allowing residents to savor the mild days before they dwindle further into winter.
As the seasons shift in Longmen, China, September marks a gentle lull in the winds, with an average speed of 1.2 m/s (3 mph). This slight drop continues a trend observed since the summer months, where winds gradually decreased from a peak of 1.9 m/s in May and October to a more tranquil pace. While November brings a subtle increase to 1.7 m/s (4 mph), the overall pattern highlights September as a time of calming breezes, painting a serene backdrop for the changes in nature. As autumn approaches, these mellow winds invite a reflective ambiance, perfectly complementing the season's gradual transformation.
Weather in Longmen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Longmen, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures typically range from a minimum of 16°C (61°F) to a scorching maximum of 36°C (97°F), with an average of 25°C (77°F). This month also experiences higher humidity at 61% and substantial rainfall of 104 mm (4.1 in) over about 13 days. In contrast, January boasts cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 25°C (78°F), averaging around 12°C (54°F). This month is much drier, with only 45 mm (1.8 in) of precipitation across 5 days and slightly higher humidity at 66%. For more detailed information on January weather, you can visit Longmen weather in January.
In comparing the weather patterns of September and February, we see a striking contrast. September boasts a much warmer climate, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 36°C (97°F), while February experiences cooler conditions, with temperatures dropping as low as -2°C (28°F) and reaching a high of 26°C (80°F). Although September receives more rainfall, totaling 104 mm (4.1 in) over 13 days, February has a slightly lower precipitation level of 81 mm (3.2 in) across 10 days. Additionally, February has a higher humidity level at 70%, compared to September's 61%. For those interested in exploring more about February weather, you can visit Longmen weather in February.
When comparing the weather in September and March, notable differences emerge. September boasts much warmer temperatures, with a minimum of 16°C (61°F) and an average high of 36°C (97°F), while March is significantly cooler, beginning at a minimum of 3°C (37°F) and averaging a maximum of 28°C (82°F). Precipitation levels are also higher in March, with 157 mm (6.2 in) recorded over 18 days, compared to September's 104 mm (4.1 in) over 13 days. Additionally, March experiences higher humidity at 77%, compared to September’s 61%. For more detailed insights on March weather, you can check Longmen weather in March.
September and April offer contrasting weather patterns, reflecting the transition between seasons. In September, temperatures range from a mild minimum of 16°C (61°F) to a sweltering maximum of 36°C (97°F), with an average of 25°C (77°F). In contrast, April experiences cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 31°C (88°F), averaging 19°C (66°F). Precipitation is notable in both months, with September receiving 104 mm (4.1 in) over 13 days, while April sees higher precipitation levels at 145 mm (5.7 in) across 16 days. Additionally, humidity is generally higher in April at 76%, compared to 61% in September, contributing to a more humid atmosphere during the spring month. For more specific insights on April weather, you can refer to Longmen weather in April.
When comparing the weather in September and May, several distinct differences emerge. September typically experiences warmer temperatures with a minimum of 16°C (61°F) and an average high of 36°C (97°F), while May has cooler temperatures that range from a minimum of 10°C (51°F) to a maximum of 34°C (93°F). In terms of precipitation, May is wetter, receiving a total of 209 mm (8.2 in) over 19 days compared to September's 104 mm (4.1 in) over 13 days. Additionally, humidity levels are higher in May at 85%, compared to September's 61%. For more details about May weather, you can visit Longmen weather in May.
When comparing the weather in September and June, notable differences emerge despite similar average temperatures. September sees a wider range of temperatures, with a minimum of 16°C and a maximum of 36°C, whereas June maintains a milder range with a minimum of 18°C and a maximum of 34°C. Humidity levels are lower in September at 61%, compared to June's higher 80%, contributing to a generally more comfortable atmosphere in September. Precipitation is significantly greater in June, with 322 mm falling over 23 days, compared to September's 104 mm over 13 days, indicating that June tends to experience more rainy days. For more detailed insights into June weather in specific locations, you can refer to Longmen weather in June.
When comparing the weather in September and July, we notice distinct differences in temperature and humidity. In July, the minimum temperature is higher at 21°C (69°F) compared to September's 16°C (61°F), while the average temperature in July is 26°C (80°F), just slightly below September's average of 25°C (77°F). However, both months reach a maximum of 36°C (96°F in July and 97°F in September). Rainfall is more frequent in July, with 118 mm (4.7 in) of precipitation over 18 days, as opposed to September's 104 mm (4.1 in) spread over 13 days. Additionally, humidity is significantly higher in July at 87%, in contrast to September's 61%. For more details on July weather, you can refer to Longmen weather in July.
In comparing the weather of September and August, we see notable differences in temperature and precipitation patterns. September generally experiences slightly cooler temperatures, with averages of 25°C (77°F) compared to August's 26°C (79°F). The minimum temperatures in September drop to 16°C (61°F), while August starts at a higher minimum of 20°C (69°F). Meanwhile, August is considerably wetter, receiving 211 mm (8.3 in) of rainfall over 20 days, compared to September’s 104 mm (4.1 in) over just 13 days. Additionally, humidity levels in August are higher at 84%, while September sees a humidity reduction to 61%. For more details on August weather in Longmen, you can visit Longmen weather in August.
September typically showcases warmer temperatures, with a minimum of 16°C (61°F) and an average of 25°C (77°F), reaching up to a scorching maximum of 36°C (97°F). In addition, it experiences more rainfall, averaging 104 mm (4.1 in) over approximately 13 days, accompanied by a humidity level of 61%. In contrast, October brings a noticeable drop in temperatures, with lows of 9°C (48°F) and an average of 21°C (71°F), peaking at a maximum of 34°C (93°F). Precipitation also decreases to 55 mm (2.2 in) over 8 days, with humidity slightly rising to 62%. For those interested in the specific weather conditions for Longmen in October, additional details can be found here: Longmen weather in October.
In September, the weather is characterized by warmer temperatures, with a minimum of 16°C (61°F) and an average of 25°C (77°F), peaking at a hot 36°C (97°F). This month sees a substantial amount of precipitation, totalling 104 mm (4.1 in) over 13 days, along with a humidity level of 61%. In contrast, November brings a noticeable chill, with temperatures dropping to a minimum of 5°C (41°F) and averaging around 17°C (63°F), reaching a comfortable maximum of 29°C (84°F). Precipitation is significantly decreased in November, amounting to only 48 mm (1.9 in) over 8 days, coupled with slightly higher humidity at 67%. For a detailed look at the weather conditions during this month, check out Longmen weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of 16°C (61°F) to a scorching maximum of 36°C (97°F), with an average of 25°C (77°F). The month sees significant rainfall, accumulating 104 mm (4.1 in) over 13 days, and humidity levels hover around 61%. In contrast, December experiences much cooler temperatures, with a minimum of 2°C (35°F), an average of 13°C (55°F), and a maximum of 27°C (81°F). Precipitation drops to 30 mm (1.2 in) over just 5 days, while humidity increases to 74%. For more detailed insights on December weather, visit Longmen weather in December.
As September arrives, Longmen experiences a shift in weather, characterized by warm temperatures that range between comfortable nights and sizzling days. This month stands out with higher humidity levels and a noticeable increase in precipitation, making it one of the more moist periods of the year, with a notable number of rainy days. These factors contribute to a vibrant landscape, contrasting with the drier months preceding it. For more insights into the weather patterns throughout the year, explore our detailed overview at Longmen Climate.