Last updated: October 30, 2025
September in Yeosu, South Korea presents a delightful transition into autumn, with temperatures ranging from a comfortable 17°C (63°F) to a peak of 28°C (83°F). The average temperature settles at a pleasant 23°C (74°F), making it an inviting time for outdoor activities. However, travelers should be prepared for occasional rain, as the month sees 12 days of precipitation, totaling 259 mm (10.2 in). With humidity levels hovering around 80%, the air carries a refreshing quality amidst the lush landscapes. Embrace the blend of warm days and cool evenings that September offers in this stunning coastal city.
September in Yeosu, South Korea heralds a delightful transition from the sweltering summer months to a more temperate autumn. With minimum temperatures settling around 17°C (63°F) and averaging 23°C (74°F), the month offers a pleasant reprieve from the heat. By day, temperatures can reach a warm 28°C (83°F), making it ideal for outdoor activities and enjoying the city's stunning coastal views. As summer’s humidity fades, September brings a refreshing balminess, inviting both locals and visitors to explore the vibrant landscapes and culture of this beautiful region.
September marks a peak in precipitation for Yeosu, South Korea, with an impressive 259 mm (10.2 in) of rain falling over 12 days. This surge follows a notably wet July and adds contrast to the drier months that precede and follow it, such as October with just 113 mm (4.5 in). The rainfall in September is a striking continuation of the summer's monsoon influence, which sees the city receiving substantial moisture leading into the autumn. This month not only highlights the region's climatic extremes but also serves as a reminder of Yeosu's dynamic weather patterns throughout the year.
In September, Yeosu, South Korea experiences a humidity level of 80%, marking a slight decline from the peak summer months. This month finds a balance, as it transitions away from the sweltering 95% humidity seen in July and the still-high 93% of August. While September remains on the higher side compared to the drier winter months, it signifies a gradual shift toward more comfortable conditions. Humidity begins to taper off as Yeosu approaches October, which averages 77%, indicating the onset of autumn and a welcome change for residents and visitors alike. Overall, the trend showcases a steady increase from early spring, culminating in peak humidity during the summer, followed by this gentle descent towards the fall season.
As September rolls into Yeosu, South Korea, the UV Index reaches a notable 10, categorizing the exposure as very high. This signifies a slight dip from the peak of extreme values seen in July and August, yet it’s still crucial for sun seekers to remain vigilant. With a burn time of just 15 minutes, even brief exposure can lead to skin damage, urging visitors and locals alike to adopt adequate sun protection measures. Overall, the transition from the scorching summer months to slightly milder conditions is apparent, but the need for caution persists. For more detailed insights, check the Yeosu UV Index.
UV Risk Categories
September in Yeosu, South Korea, welcomes 257 hours of sunshine, a delightful continuation of the summer's warmth before the cooler autumn days set in. This month beautifully bridges the vibrant energy of summer, seen in August's impressive 300 hours, and the beginning of fall, where October offers 268 hours. The trend illustrates a gradual decline in sunlight as the year progresses, with peak brightness during late spring to early summer, showcasing May's remarkable 306 hours. As September transitions to October, residents and visitors alike can bask in the softer rays, making it an ideal time to explore Yeosu's captivating seaside vistas and lively culture.
In Yeosu, South Korea, the likelihood of sunny weather experiences notable fluctuations throughout the year. September presents a 34% chance of sunshine, aligning more closely with the lower rates seen in the summer months of July and August. This suggests that while the summer heat lingers, bright days are not guaranteed. However, as the season transitions to autumn in October, the likelihood jumps significantly to 59%, hinting at a return to clearer skies. Overall, September’s weather is a part of this summer-to-autumn shift, where the promise of sunnier days is just around the corner.
As summer draws to a close, September in Yeosu, South Korea, experiences a gentle decline in daylight, with 12 hours of sun illuminating the skies. Following the peak daylight of 14 hours in both June and July, the days steadily shorten, transitioning from the warm, sun-drenched months of summer to the cooler autumn season. This gradual decrease in daylight is mirrored by the consistent 13 hours in May and August, highlighting a trend of extended brightness during the late spring and summertime. As the month progresses, residents and visitors alike can bask in the lingering rays of summer, relishing the transition into the rich hues of autumn that lies ahead.
In September, Yeosu experiences a noticeable uptick in wind activity, with average wind speeds reaching 5.7 m/s (13 mph), the highest of the year. This invigorating breeze follows a gradual decline from the summer months, where wind speeds hovered around 4.1 to 4.3 m/s. The shift in September suggests a transition into fall, invigorating the coastal landscape and offering a refreshing change after the warm, still air of summer. As the city prepares for the cooler months ahead, September’s lively winds are a reminder of nature’s dynamic rhythm, inviting both locals and visitors to revel in the refreshed atmosphere.
Weather in Yeosu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yeosu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 28°C (83°F), and an average of 23°C (74°F). This month is characterized by high humidity at 80% and substantial rainfall, with around 259 mm (10.2 in) over approximately 12 days. In contrast, January presents a starkly different climate, featuring much colder temperatures with a minimum of -8°C (18°F) and a maximum of 15°C (59°F), averaging just 4°C (39°F). January also experiences minimal precipitation, totaling only 32 mm (1.3 in) across 3 days, along with lower humidity levels of 72%. For more details on weather conditions, check out Yeosu weather in January.
September and February present vastly different weather conditions. In September, temperatures range from a mild 17°C (63°F) to a warm 28°C (83°F), with an average of 23°C (74°F). The month experiences considerable rainfall, totaling 259 mm (10.2 in) over 12 days, and humidity levels are high at 80%. In contrast, February offers a much colder climate, with temperatures dipping as low as -6°C (22°F) and peaking at 14°C (57°F), averaging just 5°C (41°F). Rainfall is minimal in February, with only 41 mm (1.6 in) over 4 days and a lower humidity level of 67%. For more details on the February climate, you can check out Yeosu weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a mild 17°C (63°F) at night to a warm average of 23°C (74°F), peaking at 28°C (83°F), accompanied by significant rainfall of 259 mm (10.2 in) over 12 days. The humidity is notably high at 80%, creating a muggy atmosphere. In contrast, March sees much cooler temperatures, with a minimum of 0°C (33°F) and an average of 9°C (49°F), reaching a maximum of only 15°C (60°F). Precipitation decreases considerably to 92 mm (3.6 in) over just 7 days, and humidity levels are lower at 65%. For more details on the weather conditions during this month, you can check Yeosu weather in March.
September and April present contrasting weather conditions, with September being warmer and more humid. In September, temperatures range from a minimum of 17°C (63°F) to a pleasant average of 23°C (74°F), peaking at 28°C (83°F). This month also sees significant rainfall, with 259 mm (10.2 in) of precipitation over approximately 12 days, contributing to a high humidity level of 80%. In contrast, April features much cooler temperatures, with a minimum of 5°C (42°F) and an average of just 13°C (56°F), reaching a maximum of 19°C (66°F). The precipitation in April is considerably lower at 108 mm (4.3 in) over 7 days, coupled with a humidity level of 75%. For more detailed insights into April weather, you can visit Yeosu weather in April.
September tends to be warmer than May, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 28°C (83°F), compared to May’s cooler range of 11°C (52°F) to 25°C (77°F). Additionally, September experiences significantly higher precipitation, totaling 259 mm (10.2 in) over approximately 12 days, while May has a milder 146 mm (5.8 in) spread over just 8 days. The humidity is quite similar in both months, with September at 80% and May slightly higher at 83%. For a deeper look at the weather patterns in May, you can check out Yeosu weather in May.
In September, the weather tends to be warmer compared to June, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 28°C (83°F), while June experiences slightly cooler temperatures, with a range from 17°C (62°F) to 26°C (80°F). Additionally, September sees more rainfall, totaling 259 mm (10.2 in) over 12 days, compared to June's 188 mm (7.4 in) spread over just 8 days. The humidity levels are also notable, reaching 80% in September and peaking at 87% in June. For a more detailed look at June weather, check out Yeosu weather in June.
In comparing the weather of September and July, September offers slightly cooler temperatures, with minimums around 17°C (63°F) and maximums reaching 28°C (83°F), while July experiences warmer conditions, with a minimum of 20°C (69°F) and maximums up to 31°C (89°F). Despite July being warmer, it also tends to be more humid, with humidity levels at 95% compared to September's 80%. Precipitation levels are similar, with July receiving 275 mm (10.8 in) over 13 days and September accumulating 259 mm (10.2 in) over 12 days. For a closer look at July's weather specifics, check out Yeosu weather in July.
In comparing the weather from August to September, we see a noticeable shift in temperatures and humidity levels. August typically experiences warmer days with average temperatures around 27°C (81°F) and a maximum of 32°C (90°F), while September cools down slightly, with averages around 23°C (74°F) and maximums reaching 28°C (83°F). Precipitation increases in September, totaling 259 mm (10.2 in) over 12 days, compared to August's 173 mm (6.8 in) over 13 days. Additionally, humidity remains quite high in both months, though August is slightly more humid at 93% compared to September's 80%. For a closer look at August weather, visit Yeosu weather in August.
September weather in Yeosu features warm temperatures, with a minimum of 17°C (63°F) and an average high of 28°C (83°F). The month is also characterized by significant rainfall, totaling 259 mm (10.2 in) over 12 days, contributing to a high humidity level of 80%. In contrast, October sees a noticeable drop in temperatures, with a minimum of 8°C (46°F) and an average temperature of 18°C (65°F). Precipitation decreases significantly to 113 mm (4.5 in) over just 5 days, and humidity levels decrease slightly to 77%. For more details on October weather, you can check Yeosu weather in October.
September and November present a striking contrast in weather conditions. September typically enjoys warmer temperatures, with daily averages around 23°C (74°F) and maximums reaching 28°C (83°F), complemented by high humidity levels of 80%. However, it also experiences significant rainfall, with 259 mm (10.2 in) over 12 days. In contrast, November cools down considerably, with averages dropping to 13°C (55°F) and maximums peaking at 20°C (68°F). This month is much drier, with only 26 mm (1.0 in) of precipitation over just 3 days, alongside a slight drop in humidity to 75%. For more details, check out the full overview of Yeosu weather in November.
September and December present stark contrasts in weather. September boasts a warm climate with temperatures ranging from a mild 17°C (63°F) at night to a maximum of 28°C (83°F) during the day, accompanied by high humidity levels of 80%. It also experiences significant rainfall, with an average of 259 mm (10.2 in) over 12 days. In contrast, December sees a dramatic drop in temperatures, with lows plunging to -6°C (22°F) and highs only reaching up to 15°C (60°F). The month is much drier, with precipitation totaling just 23 mm (0.9 in) over 3 days and a lower humidity of 73%. For more details on December weather, you can visit Yeosu weather in December.
As summer transitions to autumn, September in Yeosu experiences a delightful shift in weather characterized by warmer temperatures averaging around 23°C (74°F), yet remains blessed with notably high humidity levels of 80%. While you can still enjoy pleasant days with maximum highs of 28°C (83°F), it's also the onset of the rainy season, with 259 mm (10.2 in) of precipitation over several days, marking a stark contrast to the drier months preceding it. This blend of warmth and moisture creates an inviting atmosphere that draws visitors to experience the lush beauty of Yeosu. For more detailed insights into what to expect throughout the year, check out Yeosu Climate.