Last updated: October 30, 2025
September in Jeonju, South Korea, is characterized by mild temperatures and high humidity, making it a pleasant yet occasionally rainy month. Daytime temperatures can soar to a maximum of 31°C (88°F), while evening temperatures drop to a cool average of 21°C (70°F) and can even reach a brisk minimum of 8°C (48°F). With an average precipitation of 201 mm (7.9 in) spread over 11 rainy days, the month offers plenty of opportunities for refreshing showers. Expect humidity levels around 80%, which can enhance the warmth and make for a vibrant, lush environment as summer transitions into autumn.
In September, Jeonju experiences a pleasant transition into autumn, marked by mild temperatures that invite locals and visitors alike to enjoy the outdoors. The minimum temperature hovers around 8°C (48°F), while daytime warmth rises to a comfortable average of 21°C (70°F), peaking at a maximum of 31°C (88°F). This month stands out for its balanced conditions, especially when compared to the sweltering heat of August. As the city sheds the remnants of summer, this moderate climate not only enhances the stunning fall foliage but also fosters a vibrant atmosphere perfect for exploring Jeonju's rich cultural heritage and culinary delights.
In September, Jeonju experiences a notable shift in precipitation patterns, with 201 mm (7.9 in) of rain falling over 11 days. Following the intensely wet months of July and August, which boasted heavy rainfall amounts of 261 mm (10.3 in) and 214 mm (8.4 in) respectively, September marks a slight decrease in both precipitation and the number of rainy days. This transitional month retains significant moisture, often characterized by lingering summer storms, but also signals the onset of autumn, setting the stage for much drier conditions as the season progresses. The overall trend indicates not only a gradual easing of summer's grip but also prepares the region for the cooler, less humid days ahead.
In September, Jeonju, South Korea, experiences a noticeable drop in humidity, settling at 80%. This marks a significant shift from the high levels seen in the sultry summer months of July and August, which hover near 95% and 93%, respectively. As the city transitions into autumn, the humidity decreases, yet remains elevated compared to earlier months such as March and February, where it dipped to 67% and 68%. This gradual decline hints at the approaching fall, providing a reprieve from the intense mugginess of summer while still retaining a hint of tropical warmth. Overall, September serves as a bridge, ushering in cooler weather while still embracing some of the lingering humidity of the season.
In September, Jeonju, South Korea, experiences a very high UV Index of 10, indicating that sun protection is essential for extended outdoor activities. This month marks a slight decrease from the extreme levels seen in July and August, where the UV Index peaked at 12, necessitating minimal sun exposure and intense precaution. With a burn time of only 15 minutes, sun safety should remain a priority, as residents and visitors enjoy the transitioning autumn weather. As the year progresses, the UV Index will further decline, but September still calls for vigilance when basking in those late-summer rays. For more details on the UV Index throughout the year, visit Jeonju UV Index.
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As summer softly wanes in Jeonju, September brings a delightful 246 hours of sunshine, marking a gentle transition from the sun-drenched days of summer. This month witnesses a notable decrease in daylight compared to the sunniest peak of May with 304 hours, yet it remains vibrant as it gracefully bridges the warm hues of late summer and the crispness of autumn. Following August's lush 286 hours, the sunlight in September offers a comfortable reprieve, hinting at the cooler months ahead while still encouraging leisurely strolls through the city’s charming streets. This trend of diminishing daylight continues into October, yet every sunny hour in September is a golden opportunity to savor the lingering warmth before the season shifts.
As September rolls in, Jeonju experiences a shift in weather patterns, with a 34% chance of sunny days. This comes right after the typically cloudier months of July and August, which see chances plummet to 21% and 28%, respectively. Although September's sunshine odds aren’t the highest of the year, they signal a promising transition toward clearer skies. The likelihood of sunny weather starts to rise again in October, reaching 51%, suggesting that while September may be somewhat overcast, it marks the beginning of an upswing in sun-filled days as autumn approaches.
As September arrives in Jeonju, South Korea, the daylight duration begins its gentle descent, offering about 12 hours of light each day. This transition marks a shift from the prolonged brightness of summer, where daylight peaks at 14 hours in June and July. While daylight in September is slightly reduced compared to the previous months, it still provides a pleasant balance between daylight and evening calm, especially as the lush greens of August give way to the warm hues of autumn. The trend of gradually shortening days continues into October, signaling the approach of winter, when daylight durations will be at their shortest. This rhythm of changing light shapes not only the landscape but also the lifestyle in Jeonju, welcoming the cozy embrace of fall.
As summer fades and autumn approaches, September in Jeonju carries a gentle breeze with an average wind speed of 2.4 m/s (5 mph), reflecting a subtle shift from the stillness of the hotter months. While July and August experience the calmest winds at just 1.9 m/s (4 mph), September's slight uptick hints at nature's transition toward cooler, crisper days. This refreshing increase continues into October, where winds maintain their pace, revealing a trend of stability as the temperatures drop. Overall, September’s mild winds herald the onset of fall, inviting residents and visitors alike to embrace the vibrant changes in this charming South Korean city.
Weather in Jeonju varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jeonju, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a mild 8°C (48°F) at night to a warm 31°C (88°F) during the day, with an average of 21°C (70°F). This month is also characterized by high humidity at 80% and substantial rainfall of 201 mm (7.9 in) over approximately 11 days. In contrast, January plunges into the depths of winter, with temperatures dipping as low as -19°C (-2°F) and averaging just -1°C (31°F). Precipitation is significantly lower, totaling only 29 mm (1.1 in) across about 5 days, and humidity drops to 71%. For a more detailed understanding of January weather, you can refer to Jeonju weather in January.
September and February present striking contrasts in weather patterns. September boasts warmer temperatures, with a minimum of 8°C (48°F) and a maximum reaching 31°C (88°F), while averaging around 21°C (70°F). This month is also marked by significant precipitation, totaling 201 mm (7.9 in) over 11 days, coupled with high humidity at 80%. In contrast, February experiences much colder conditions, with temperatures dropping to a minimum of -14°C (7°F) and averaging just 1°C (34°F), while peaking at 22°C (71°F) on rare occasions. Precipitation is far less frequent in February, at 39 mm (1.5 in) over only 5 days, and humidity levels are lower at 68%. For an in-depth look at February weather, you can visit Jeonju weather in February.
In September, the weather is notably warmer, with temperatures ranging from a chilly 8°C (48°F) at night to a hot 31°C (88°F) during the day, accompanied by high humidity levels at 80%. Rainfall is significant, averaging 201 mm (7.9 in) over 11 days, making it a wetter month. In contrast, March experiences cooler temperatures, ranging from a low of -5°C (24°F) to a mild high of 23°C (74°F), and less precipitation at 68 mm (2.7 in) over 8 days. The humidity is also lower at 67%, suggesting a brisk, refreshing feel as winter transitions to spring. For more detailed weather insights, you can visit Jeonju weather in March.
When comparing September and April weather, notable differences emerge in temperature and precipitation. In September, the minimum temperature is a mild 8°C (48°F), with average highs reaching a warm 21°C (70°F) and maximum temperatures soaring to 31°C (88°F). This month experiences substantial rainfall, totaling 201 mm (7.9 in) over approximately 11 days, accompanied by high humidity at 80%. In contrast, April starts off cooler, with minimum temperatures dipping to -2°C (29°F) and an average of 12°C (55°F), while the maximum can reach 28°C (83°F). Precipitation is significantly lower in April, totaling 63 mm (2.5 in) over about 7 days, with humidity slightly less at 78%. For more detailed information on weather conditions in April, you can refer to Jeonju weather in April.
When comparing September and May weather, September generally offers warmer temperatures, with minimums around 8°C and average highs reaching up to 31°C. In contrast, May starts with a cooler minimum temperature of 3°C and an average maximum of 30°C. Both months experience high humidity, with September at 80% and May slightly higher at 85%. However, September sees significantly more rainfall, accumulating around 201 mm over 11 days compared to May's 90 mm across 9 days. For more detailed insights into May weather specifically, you can visit Jeonju weather in May.
When comparing the weather in September and June, both months experience relatively mild temperatures, with September showing a minimum of 8°C and an average of 21°C, while June sees slightly higher temperatures with a minimum of 10°C and an average of 22°C. The maximum temperatures in June reach up to 33°C, making it the warmer month compared to September's peak of 31°C. Additionally, September is characterized by higher precipitation levels at 201 mm over 11 days, compared to June's 131 mm over 10 days. Humidity also plays a role, with September being slightly lower at 80% compared to June's 87%. For more details about the weather conditions in June, you can refer to Jeonju weather in June.
In comparing the weather between September and July, it's evident that July is generally warmer and more humid. July boasts minimum temperatures around 17°C (62°F) and maximums reaching up to 35°C (95°F), with an average of 25°C (77°F). In contrast, September experiences a wider temperature range, with minimums dropping to 8°C (48°F) and maximums peaking at 31°C (88°F), averaging 21°C (70°F). Additionally, July sees more precipitation, totaling 261 mm (10.3 in) over 17 days, compared to September's 201 mm (7.9 in) over 11 days. The humidity levels also differ significantly, with July's humidity at 95% versus September's 80%. For more detailed insights, you can check out Jeonju weather in July.
In comparing the weather of September to August, September experiences a notable drop in temperatures, with minimums reaching 8°C (48°F), while August's minimums are significantly higher at 14°C (58°F). The average temperature in September is 21°C (70°F), compared to August's warmer average of 26°C (79°F). Despite these cooler temperatures, September sees a similar amount of precipitation, with 201 mm (7.9 in) over 11 days, compared to August's 214 mm (8.4 in) over 17 days. Humidity levels are also lower in September at 80%, contrasting with the higher 93% in August, making September feel more comfortable overall. For a more detailed look at August weather, you can visit Jeonju weather in August.
In September, temperatures are quite warm, with a minimum of 8°C (48°F) and an average of 21°C (70°F), reaching a maximum of 31°C (88°F). This month also sees significant rainfall, accumulating 201 mm (7.9 in) over 11 days, and maintaining high humidity levels at 80%. In contrast, October experiences a notable drop in temperature, with a minimum of 0°C (32°F) and an average of 14°C (58°F), while still reaching a maximum of 30°C (86°F). Precipitation decreases substantially to 67 mm (2.6 in) over just 5 days, and humidity slightly lessens to 78%. For more detailed insights, check out Jeonju weather in October.
September and November showcase contrasting weather patterns. In September, temperatures range significantly from a minimum of 8°C (48°F) to a maximum of 31°C (88°F), with an average temperature of 21°C (70°F). This month brings substantial rainfall, with 201 mm (7.9 in) falling over 11 days, accompanied by high humidity at 80%. In contrast, November experiences a much cooler climate, with temperatures dipping to a minimum of -4°C (26°F) and an average of 8°C (46°F), while peaking at 21°C (70°F). Precipitation dramatically decreases to 42 mm (1.6 in) over just 6 days, and humidity slightly lowers to 76%. For a closer look at what to expect, check out Jeonju weather in November.
In September, the weather is notably warmer with average temperatures around 21°C (70°F), peaking at 31°C (88°F), while nights can drop to a milder 8°C (48°F). This month is also characterized by high humidity at 80% and frequent rainfall, experiencing about 201 mm (7.9 in) of precipitation over 11 days. In stark contrast, December brings a chill with average temperatures plummeting to around 1°C (34°F), reaching lows of -13°C (8°F) at night and highs barely touching 17°C (63°F). Precipitation is significantly less in December, totaling only 31 mm (1.2 in) over just 5 days, and humidity drops to 73%. For a more detailed look at December weather in Jeonju, you can check Jeonju weather in December.
As summer gives way to fall, September in Jeonju presents a delightful shift in weather, characterized by comfortable temperatures and a vibrant atmosphere. While it can still feel warm during the day, the evenings bring a refreshing coolness that invites locals and visitors alike to enjoy outdoor activities. Unlike the sweltering summer months, September also experiences notable rainfall, with increased precipitation and humidity levels that contribute to the lush greenery of the region. This month stands as a beautiful transition, marked by both warm and cooler days, making it a unique time to explore Jeonju. Discover more about the city's weather trends throughout the year at Jeonju Climate.