Last updated: August 21, 2025
September in Kunming, China, offers a delightful blend of mild temperatures and lush greenery, with daily highs reaching a comfortable 27°C (81°F) and average temperatures around 19°C (66°F). As the month transitions into fall, residents and visitors can expect cooler evenings with lows dipping to 10°C (50°F). However, with 193 mm (7.6 in) of rainfall spread across 22 days, the city experiences a notably humid atmosphere, averaging 85% humidity. This dynamic weather not only enhances the vibrant landscapes but also provides a refreshing backdrop for outdoor activities and exploration.
In September, Kunming experiences a gentle transition into autumn, characterized by mild temperatures that make it an ideal time to explore the city’s natural beauty. With a minimum temperature of 10°C (50°F) and a comfortable average of 19°C (66°F), visitors can enjoy pleasant days and cool evenings. The maximum temperature reaches around 27°C (81°F), marking a slight decrease from the summer highs. This month showcases fewer temperature fluctuations compared to the hotter summer months, providing a harmonious blend of warmth and refreshing coolness. As September progresses, the climate invites both locals and tourists to partake in outdoor activities amidst stunning landscapes, making it a delightful time to experience Kunming.
September in Kunming, China, marks a noticeable shift in rainfall patterns, with total precipitation reaching 193 mm (7.6 in) over 22 days of the month. While the rainfall is significant, it is a drop from the intense summer downpours witnessed in June, July, and August, which consistently exceeded 260 mm. This gradual decrease suggests a transition into drier autumn months, yet September still retains a substantial amount of moisture, nurturing the vibrant local landscapes. As the city moves into October, the monthly precipitation is expected to further decline, reflecting the region's typical seasonal patterns.
In September, Kunming experiences a significant shift in humidity, maintaining a high level at 85%. Following the peak of 90% in August, the humidity begins to taper off slightly as the city transitions into autumn. This consistent high humidity, especially from June to September, is indicative of the wet season, with levels mostly hovering in the 80s and reflecting the region's lush, subtropical climate. As the year progresses into October, humidity remains relatively high at 80%, while upcoming months gradually bring lower percentages, hinting at a respite from the pervasive dampness. Overall, September encapsulates the peak of Kunming's humid period, paving the way for the less muggy fall months ahead.
In September, Kunming, China, continues to experience extreme UV levels, with a UV Index of 13 and a burn time of just 10 minutes. This marks a slight decrease from the peak during the summer months, where July saw its highest reading at 16. Nevertheless, as the region transitions toward fall, caution is still essential for outdoor activities, as the sun's intensity remains significant. As seen throughout the year, Kunming's UV Index trends highlight a persistent need for sun protection, particularly from March through September. For more detailed information about UV levels in this vibrant city, visit Kunming UV Index.
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As summer draws to a close in September, Kunming enjoys a delightful 285 hours of sunshine, gracefully transitioning from the season's vibrant glow. Throughout the year, sunlight peaks in May with an impressive 329 hours, showcasing the city’s sun-kissed allure. The months preceding September reveal a trend of abundant daylight, with August also basking in ample sunshine, measuring 310 hours. However, as autumn approaches, sunshine hours subtly taper off, with October witnessing a decline to 246 hours. This beautiful cycle of light not only enhances the city's charm but also paints a vivid backdrop for outdoor adventures and cultural explorations.
In September, Kunming, China experiences a moderate 34% chance of sunny weather, marking a notable increase from the gloomy months of July and August, where sunlight graces the city only 13% and 19% of the time, respectively. This upward trend hints at the transition from the summer monsoon season, as September paves the way for clearer skies. However, compared to the brighter days of March, which holds a striking 76% sun chance, September still lags behind. As autumn approaches, visitors can expect some sunny days amidst the lingering clouds, making it a delightful time to explore Kunming's natural beauty.
As September unfolds in Kunming, China, residents enjoy 12 hours of daylight, marking a slight decline from the peak of summer. This transition illustrates a gentle shift as the city moves from the bright days of May through August, where sunlight peaked at 13 hours. The consistent daylight hours throughout spring and summer foster an inviting atmosphere, perfect for outdoor activities. As the months progress towards October, daylight begins to taper off, falling to 11 hours, signaling the onset of autumn. This gradual ebb in illumination reflects the natural rhythm of the seasons, offering a beautiful balance between light and darkness in one of China's most picturesque locales.
As September graces Kunming with its presence, the city's gentle breezes begin to wane, with the average wind speed dropping to 2.1 m/s (5 mph), marking it as one of the calmest months of the year. Following a steady climb from January's moderate 3.3 m/s (7 mph), winds picked up speed through spring, peaking in March at 4.5 m/s (10 mph) before gradually retreating into the summer's stillness. This trend indicates a seasonal rhythm where the lively gusts of previous months give way to a more tranquil atmosphere, inviting residents and visitors alike to enjoy the serene charm of Kunming in early autumn. The mild winds of September create a perfect backdrop for leisurely strolls and outdoor exploration, offering a welcome reminder of nature's ebb and flow.
Weather in Kunming varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kunming, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present quite distinct weather contrasts. In September, temperatures range from a mild 10°C (50°F) to a pleasant high of 27°C (81°F), accompanied by significant rainfall of 193 mm (7.6 in) over 22 days, resulting in a humidity level of 85%. This month is typically warm and quite wet. In contrast, January experiences colder conditions, with temperatures dipping as low as -3°C (26°F) and averaging around 9°C (49°F), peaking at 20°C (69°F). Precipitation is significantly lower, with only 42 mm (1.7 in) over just 5 days, and humidity drops to a much drier 56%. For a more detailed look at January weather, check out Kunming weather in January.
September and February present strikingly different weather conditions. In September, temperatures range from a mild 10°C (50°F) to a warm 27°C (81°F), with an average of 19°C (66°F). The month is characterized by significant rainfall, totaling 193 mm (7.6 in) over 22 days and a high humidity level of 85%. In contrast, February features colder weather, with temperatures dipping to a minimum of -3°C (28°F) and reaching a comfortable maximum of 24°C (75°F), averaging 11°C (52°F). Precipitation is minimal during this month, at just 29 mm (1.1 in) over 5 days, with lower humidity at 69%. For a detailed look at February weather specifics, you can visit Kunming weather in February.
When comparing the weather in September and March, several key differences emerge. September typically experiences milder temperatures, with averages ranging from a minimum of 10°C (50°F) to a maximum of 27°C (81°F). However, it is also marked by significant rainfall, with about 193 mm (7.6 in) of precipitation over an average of 22 days, leading to high humidity levels at 85%. In contrast, March tends to be cooler, with temperatures averaging between 4°C (40°F) and 28°C (83°F). It enjoys much less rainfall, accumulating only 33 mm (1.3 in) over approximately 6 days, and boasts a lower humidity level of 54%. For more detailed information, you can refer to Kunming weather in March.
In comparing the weather of September and April, September experiences a milder temperature range with a minimum of 10°C (50°F) and an average of 19°C (66°F), peaking at 27°C (81°F). This month is considerably wetter, with a total precipitation of 193 mm (7.6 in) spread over 22 days and a high humidity level of 85%. In contrast, April boasts a lower minimum temperature of 3°C (38°F) and a similar average of 17°C (63°F), but can reach a maximum of 31°C (88°F). Additionally, April is much drier, with only 85 mm (3.4 in) of rain falling over 11 days and a humidity level that is significantly lower at 54%. For more specific insights on April's climate, visit Kunming weather in April.
In September, temperatures in the region exhibit a mild range with a minimum of 10°C (50°F) and a maximum of 27°C (81°F), resulting in an average temperature of 19°C (66°F). The month is characterized by significant rainfall, with 193 mm (7.6 in) of precipitation over 22 days, contributing to a high humidity level of 85%. In contrast, May offers slightly warmer conditions, marked by a minimum temperature of 7°C (44°F) and a maximum of 32°C (90°F), with an average temperature of 20°C (68°F). Rainfall during May is considerably lower at 88 mm (3.5 in) over just 11 days, and the humidity rests at a more comfortable 69%. For more details on May weather patterns, you can visit Kunming weather in May.
September and June in Kunming exhibit distinct weather patterns, despite similar high humidity levels at 85%. September tends to have cooler temperatures, with a minimum of 10°C (50°F) and an average of 19°C (66°F), peaking at 27°C (81°F). In contrast, June is warmer, featuring a minimum of 12°C (54°F), an average of 21°C (70°F), and a maximum of 30°C (85°F). Precipitation is notably higher in June, totaling 270 mm (10.6 in) across 21 days, compared to September's 193 mm (7.6 in) over 22 days. For more insights into the weather patterns during this month, you can explore Kunming weather in June.
In comparing the weather patterns of September and July, we find that both months feature mild temperatures, but with notable differences. July tends to be warmer overall, with average temperatures reaching 20°C (69°F) and a maximum of 28°C (83°F), while September shows slightly cooler averages at 19°C (66°F) and peaks at 27°C (81°F). However, July experiences higher humidity at 89% compared to September’s 85%. Additionally, July also sees more rainfall, accumulating 272 mm (10.7 in) over 26 days, whereas September sees 193 mm (7.6 in) of rain across 22 days. For a closer look at July's weather, you can visit Kunming weather in July.
In comparing the weather between August and September, September experiences cooler temperatures, with a minimum of 10°C and a maximum of 27°C, while August has slightly warmer conditions, ranging from a minimum of 15°C to a maximum of 29°C. Precipitation is notably higher in August, totaling 269 mm over 26 days compared to September's 193 mm over 22 days. Additionally, humidity levels in September are slightly lower at 85%, compared to August’s 90%. For a more detailed look at August weather conditions, visit Kunming weather in August.
September typically showcases warmer temperatures with a minimum of 10°C (50°F) and an average of 19°C (66°F), peaking at 27°C (81°F). However, it is also marked by higher humidity at 85% and considerable rainfall, totaling 193 mm (7.6 in) over 22 days. In contrast, October brings a slight drop in both temperature and precipitation, with minimums of 8°C (47°F) and an average of 16°C (61°F), peaking at 25°C (78°F). Rainfall decreases to 109 mm (4.3 in) over 17 days, and humidity also dips to 80%. For more detailed information, you can explore the Kunming weather in October.
September and November exhibit noticeable differences in weather patterns. In September, temperatures range from a mild minimum of 10°C (50°F) to a warm maximum of 27°C (81°F), with an average of 19°C (66°F). This month is also characterized by high precipitation, collecting 193 mm (7.6 in) over 22 days, and humidity levels hovering around 85%.
Contrastingly, November sees a significant drop in temperatures, with a minimum of 3°C (38°F) and a maximum of 24°C (75°F), averaging at 13°C (55°F). Additionally, November is much drier, recording only 37 mm (1.4 in) of rain spread over just 7 days, and a slightly lower humidity level of 83%. For more detailed information, check out Kunming weather in November.
September and December exhibit markedly different weather conditions. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). The month is characterized by significant precipitation, totaling 193 mm (7.6 in) over 22 rainy days and high humidity at 85%. In contrast, December presents a much cooler climate, with temperatures dropping to a minimum of -2°C (29°F) and peaking at 20°C (68°F), averaging just 9°C (49°F). Precipitation is minimal during this month, with only 28 mm (1.1 in) over just 5 days and lower humidity at 74%. For a more detailed insight into December conditions, you can check out Kunming weather in December.
As September unfolds in Kunming, the city experiences a distinct shift in its weather patterns. With an average temperature hovering around a mild 19°C (66°F), the warmth of summer begins to wane, offering a welcome respite from the hottest months. However, don’t be fooled—the pervasive humidity at 85% and over 20 days of rainfall can make the atmosphere feel quite muggy, marking September as one of the wetter months of the year. This transition period is not just a bridge to cooler days but also enriches the landscape with lush greenery. For a deeper dive into the nuances of Kunming’s climate, explore Kunming Climate.