Last updated: August 21, 2025
In September, Hunan, China experiences a transitional climate, characterized by an average temperature of 27°C (81°F), with maximums reaching 30°C (86°F) and minimums dropping to 22°C (72°F). This month sees 87 mm (3.4 in) of rainfall spread over approximately 15 days, contributing to a humidity level of about 70%. As summer wanes, the weather becomes increasingly humid and rainy, making it a month of dramatic shifts and occasional downpours, perfect for lush greenery and vibrant landscapes.
In September, Hunan, China, experiences a delightful transition from the summer heat, with minimum temperatures around 22°C (72°F) and averaging 27°C (81°F), peaking at a comfortable 30°C (86°F). This month marks a slight dip from the sweltering conditions of July and August, making it an ideal time for outdoor activities and exploration. As the humidity begins to recede, the weather becomes more pleasant, allowing visitors and locals alike to enjoy the beautiful landscapes without the oppressive heat that characterizes the peak summer months. This gradual shift signals the approach of fall, as temperatures continue their steady decline into October, paving the way for a refreshing change in the season.
In September, Hunan experiences a notable transition in precipitation patterns, receiving 87 mm (3.4 in) of rain over 15 days. This marks a decrease from the preceding months, particularly August, which recorded a staggering 221 mm (8.7 in) during 17 rainy days. The lighter rainfall in September reflects a gradual shift towards drier conditions as the region approaches the end of its summer monsoon, leading to a significant drop from June's peak of 268 mm (10.6 in). Overall, September serves as a bridge, blending the remnants of summer rains with the upcoming autumn dryness, aligning with the broader trend of tapering precipitation as the year progresses.
As the summer months transition into autumn, September in Hunan, China experiences a noticeable dip in humidity, dropping to 70%. This marks a significant decrease from the peak levels observed in May (85%), June (81%), and July (84%). During the warm months, the humidity consistently hovers above 80%, creating a sticky atmosphere typical of subtropical climates. However, as the heat of summer wanes, Hunan welcomes a refreshing breath of air in September, paving the way for a more comfortable environment and hinting at the milder conditions of the coming months. This trend of fluctuating humidity levels reflects a dynamic climate, where the transition from summer to fall not only brings about a change in temperature but also a welcome reprieve from the more oppressive humidity of the preceding months.
In September, Hunan experiences a notable shift in its UV Index, which stands at 11, categorizing it as extreme and indicating a burn time of just 10 minutes. This marks a decrease from the peaks reached during the summer months of June to August, when the UV Index soared to 13. As a result, while September still calls for caution in sun exposure, the reduced UV levels signal a gradual transition towards more moderate conditions as autumn approaches. Tracking these changes is vital for sun safety, especially as the UV Index dips further in October to 9. For more detailed information on UV levels throughout the year, visit Hunan UV Index.
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September in Hunan, China, basks in a radiant embrace of sunshine, with an impressive 288 hours of daylight. This month reflects the transition from the bustling heat of summer, particularly July, which boasts the highest sunshine at 323 hours, to the gentle warmth of autumn. Following the peak summer months of July and August, which enjoy 308 hours and maintain a strong sun-filled presence, September shines brightly yet slightly less intensely, paving the way for the cooler months ahead. As the year progresses, the hours of sunshine gradually taper off, with October seeing 257 hours, hinting at the impending chill of winter. This seasonal ebb and flow create a mesmerizing tapestry of light that shapes the landscapes and rhythms of life in Hunan.
In Hunan, China, September emerges as a standout month for sunshine, boasting a 57% chance of clear skies. This marks a notable peak following the summer months of July and August, which struggle with lower probabilities of sunny weather at 28% and 26%, respectively. As the sweltering summer gives way to early autumn, the transition results in a resurgence of sun, making September an ideal time for outdoor activities. Interestingly, the month follows a declining trend from the spring months of April and May, which experience lower chances of sunlight at 30% and 16%, highlighting September's unique position as a gateway to more favorable weather before the cooler fall months set in.
As September arrives in Hunan, China, the daylight duration begins to shift, providing a gentle transition from the long summer days. With approximately 12 hours of daylight, September maintains the longer days experienced in the summer months of June, July, and August, which consistently boast 13 hours of sunlight. However, this month marks the beginning of the decline in daylight as the region heads toward October, where daylight decreases to 11 hours and settles into shorter, crisper days in the fall and winter. This moderate change in daylight not only invites a change in lifestyle and activities but also heralds the seasonal shift that brings with it cooler temperatures and vibrant autumn foliage.
As September unfolds in Hunan, China, the air turns noticeably calmer, with average wind speeds dipping to 5.0 m/s (11 mph), making it the quietest month of the year. This gentle breeze contrasts with the more invigorating gusts of October, which surge to 9.1 m/s (20 mph), highlighting a notable seasonal shift. While summer months like July maintain a robust 6.7 m/s (15 mph) wind, the transition into early autumn reveals a gradual decline, suggesting that nature is preparing for the crisper days of fall. This trend of diminishing wind speeds continues through late summer, painting September as a month of serenity, perfect for enjoying the mild climate before the winds pick up again.
Weather in Hunan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hunan, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures are significantly warmer, with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at 30°C (86°F). The month is also marked by higher humidity at 70% and frequent rainfall, with 87 mm (3.4 in) of precipitation spread over 15 days. In contrast, January offers a much cooler climate, with a minimum temperature of 5°C (42°F) and an average of 12°C (55°F), culminating in a maximum of 19°C (67°F). January sees less precipitation—63 mm (2.5 in) over 9 days—but slightly higher humidity at 73%. For more detailed insights into January weather, check out Hunan weather in January.
September and February present a stark contrast in weather conditions. In September, temperatures are warm, with a minimum of 22°C (72°F) and an average high reaching up to 30°C (86°F), making it ideal for outdoor activities. However, it also experiences considerable rainfall, with 87 mm (3.4 in) over approximately 15 days and a humidity level of 70%. In contrast, February is much cooler, with temperatures ranging from a low of 6°C (43°F) to a maximum of 18°C (64°F) and an average of 12°C (54°F). While it has slightly more precipitation at 97 mm (3.8 in) over 11 days, the overall feel is dryer, with humidity at 73%. For more insights on February weather, you can refer to Hunan weather in February.
September typically boasts warmer conditions with average temperatures of 27°C (81°F) and a maximum of 30°C (86°F), making it feel quite pleasant despite some rain. With 87 mm (3.4 in) of precipitation spread over 15 days, humidity levels are moderate at 70%. In contrast, March presents a cooler and more unpredictable climate, featuring temperatures ranging from a minimum of 9°C (49°F) to a maximum of 20°C (69°F). The month is wetter, with a total precipitation of 147 mm (5.8 in) also distributed over 15 days, and higher humidity levels at 80%. For more detailed information, you can check Hunan weather in March.
September and April present notably different weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 27°C (81°F), making it warmer overall. The month experiences an average of 87 mm (3.4 in) of rainfall over 15 days and boasts a humidity level of 70%. In contrast, April sees cooler temperatures, with a minimum of 12°C (53°F) and a maximum of 24°C (76°F), averaging 18°C (64°F). While it rains slightly more in April, with 104 mm (4.1 in) spread over 12 days, the humidity is higher at 81%. For more details on April's weather, check Hunan weather in April.
In September, the weather tends to be warmer with an average temperature of 27°C (81°F) and maximum highs reaching 30°C (86°F). This month experiences a moderate amount of rainfall, totaling 87 mm (3.4 in) over about 15 days, accompanied by a humidity level of 70%. In contrast, May offers cooler temperatures, with an average of 22°C (72°F) and maximums of 27°C (82°F). However, it sees more substantial rainfall, with 137 mm (5.4 in) spread across 12 days and higher humidity at 85%. For a deeper look into May's weather, you can refer to Hunan weather in May.
In comparing the weather of September and June, we see some notable differences. September experiences a slightly higher average temperature of 27°C (81°F) compared to June's 26°C (79°F), with both months having similar minimum temperatures around 22°C (72°F). However, June is marked by significantly heavier rainfall, totaling 268 mm (10.6 in), which is almost three times the precipitation in September, where rainfall amounts to 87 mm (3.4 in). Both months have the same number of rainy days at 15, but June's increased humidity at 81% compared to September's 70% can make it feel more muggy. For a detailed overview, you can check Hunan weather in June.
In comparing the weather between September and July, September generally experiences slightly cooler temperatures, with a minimum of 22°C (72°F) and a maximum of 30°C (86°F), averaging around 27°C (81°F). In contrast, July has a warmer climate, with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 31°C (89°F), averaging 28°C (83°F). Additionally, September is characterized by increased precipitation, totaling 87 mm (3.4 in) over 15 days, compared to July's 55 mm (2.2 in) of rainfall over just 7 days. The humidity in July is higher at 84%, whereas September sees a more moderate level at 70%. For more details about July weather, you can visit Hunan weather in July.
September weather tends to be milder compared to August, with average temperatures dropping slightly from 28°C (83°F) in August to 27°C (81°F) in September. While the minimum temperature in September is lower at 22°C (72°F), the maximum temperature remains comfortable at 30°C (86°F), compared to August's higher maximum of 32°C (89°F). Precipitation also decreases significantly from 221 mm (8.7 in) in August, which was recorded over 17 days, to 87 mm (3.4 in) across 15 days in September. Humidity levels are also lower in September at 70%, compared to August's more humid 82%. For more detailed insights into August weather, you can visit Hunan weather in August.
In September, the weather is noticeably warmer, with average temperatures around 27°C (81°F) and maximums reaching up to 30°C (86°F). The month also experiences relatively high humidity at 70% and a total precipitation of 87 mm (3.4 in) spread over 15 days.
In contrast, October brings cooler temperatures, with an average of 23°C (74°F) and a slightly lower maximum of 29°C (85°F). Though it is a bit wetter, with 97 mm (3.8 in) of rain over 13 days, the humidity increases marginally to 73%.
For more detailed insights about October weather in Hunan, you can check this link: Hunan weather in October.
September typically boasts warmer temperatures compared to November, with averages around 27°C (81°F) and a maximum of 30°C (86°F). In contrast, November sees cooler temperatures, with an average of 19°C (67°F) and a maximum of 23°C (74°F). Both months experience similar levels of precipitation, with September receiving 87 mm (3.4 in) over 15 days and November slightly less at 85 mm (3.3 in) over 11 days. However, November is characterized by a higher humidity level of 77%, compared to September's 70%. For more detailed insights into the November weather, you can visit Hunan weather in November.
September and December weather exhibit noticeable differences, reflecting the transition from late summer to winter. In September, temperatures are warmer, with a minimum of around 22°C (72°F) and an average high of 30°C (86°F), while December sees much cooler temperatures, with lows dropping to 8°C (47°F) and an average high of 20°C (69°F). Additionally, September experiences more precipitation, averaging 87 mm (3.4 in) over 15 days, compared to December's 65 mm (2.6 in) over just 11 days. Humidity levels in December are slightly higher at 79%, compared to 70% in September, contributing to a crisper feel during the winter month. For more detailed information on December conditions, visit Hunan weather in December.
As September rolls in, Hunan experiences a shift towards comfortable warmth, with temperatures averaging around 27°C (81°F), offering a refreshing break from the more intense summer heat. This month typically sees a notable increase in precipitation, with rain gracing the region approximately half the days, setting it apart from the drier months that precede it. The humidity remains high, around 70%, contributing to a lush, vibrant landscape. September serves as a transitional period, blending the tail-end of summer warmth with the beginnings of autumnal coolness. For more in-depth information about how September weather fits into the broader Hunan climate, check out Hunan Climate.