Last updated: April 14, 2025
South Korea experiences a diverse climate characterized by sharp seasonal contrasts. In winter, temperatures can plummet to a frigid minimum of -26°C (-14°F) in Gangwon-do, while summer brings scorching highs of up to 40°C (105°F) in Chungcheongnam-do. Monthly precipitation varies dramatically; January sees a meager 17 mm (0.7 in) in Incheon, contrasted by September's deluge of 296 mm (11.6 in) in Jeju-do. Humidity levels also fluctuate, with a minimum average of 64% in March in Gangwon-do and a staggering maximum of 98% in July in Jeju-do, showcasing the country's varied atmospheric conditions throughout the year.
South Korea's climate is remarkably diverse, shaped by its geography and varying temperatures. The southern coastal city of Busan enjoys a humid subtropical climate (Cfa), ideal for lush greenery and beach lovers. In contrast, the central provinces like Chungcheongnam-do and Daejeon experience a mix of humid continental and subtropical climates (Dfa, Cfa, Dwa), creating distinct seasons. The inland city of Daegu is characterized by a humid subtropical climate with distinct wet summers (Cwa). Northern regions such as Gangwon-do showcase a variety of climates, including continental and oceanic (Dfa, Dfb), while Jeju-do remains a tropical haven with its humid subtropical climate (Cfa). Each region, from Seoul to Gwangju, boasts its unique climate identity, making South Korea an intriguing destination for climate enthusiasts and travelers alike.
| Climate Zone | Description |
|---|---|
| Cfa | Humid subtropical climate with hot summers and mild winters. |
| Cwa | Monsoon-influenced humid subtropical climate with dry winters and hot summers. |
| Dfa | Humid continental climate with hot summers and cold winters. |
| Dfb | Humid continental climate with warm summers and cold winters. |
| Dwa | Monsoon-influenced humid continental climate with dry winters and hot summers. |
| Dwb | Monsoon-influenced humid continental climate with dry winters and warm summers. |
South Korea experiences a dramatic range of temperatures throughout the year, reflecting its diverse climate zone. In winter, January and February see chilling lows, with temperatures plummeting to as low as -26°C (-14°F) in Gangwon-do, while reaching mild highs of 19°C (66°F) in Jeju-do by January's end. As spring unfolds in March and April, temperatures gradually rise; the warmth peaks in April, achieving remarkable highs of 31°C (89°F) in Gyeongsangbuk-do. Moving into summer, June marks the onset of heat, soaring to as much as 37°C (98°F) in the same region, with July and August often hitting sweltering 40°C (105°F) peaks in Chungcheongnam-do. As autumn arrives, temperatures dip again, with early September still enjoying warmer days at 32°C (90°F), but by November, chills return with lows of -11°C (12°F), particularly in Gangwon-do. Finally, December brings winter back with freezing lows of -25°C (-13°F) yet juxtaposed against the milder climate of Jeju-do, where highs reach 20°C (68°F). This seasonal rhythm creates a vibrant tapestry of weather experiences across the nation.
South Korea's precipitation patterns reveal a striking contrast between the drier winter months and the wet summer season. With a minimum of just 17 mm (0.7 in) of rainfall recorded in January in Incheon, the early part of the year remains relatively arid. In stark contrast, September sees a dramatic spike in precipitation, particularly in Jeju-do, where rainfall can reach up to 296 mm (11.6 in). This seasonal variability is further reflected in the frequency of rainy days, with the coastal province of Gangwon-do experiencing up to 17 days of rain in August, compared to a mere 2 days in November in Daegu. These trends underscore the dynamic weather patterns that characterize the region, highlighting a distinct shift from dry spells to intense rainfall as the year progresses.
In South Korea, humidity levels exhibit notable seasonal variation, with a marked increase during the summer months. For instance, March brings a relative low, with humidity dipping to a minimum of 64% in Gangwon-do. However, as the year progresses into July, the atmosphere becomes significantly more saturated, reaching a peak of 98% on the famed island of Jeju-do. This trend underscores the intense summer climate, as the humidity can create a tropical feeling, especially in coastal regions, while the drier spring months offer a refreshing contrast.
In South Korea, the trends in UV Index (UVI) reveal a significant peak during the summer months. Notably, Incheon experiences an average daily maximum UVI of 11 in August, while Jeju-do records an even higher average of 12 in July. This suggests that the UV exposure is particularly intense during July and August, highlighting the need for sun safety measures during these months. As summer progresses, the increasing UVI levels call for heightened awareness among residents and tourists alike, reminding them to protect themselves from harmful UV radiation while enjoying the beautiful outdoor environments.
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Sunshine duration varies significantly across South Korea, showcasing the diverse climatic conditions of its regions. In January, the charming island of Jeju-do receives around 161 hours of sunlight, which is slightly less than the bustling capital, Seoul, boasting 199 hours. As spring transitions into summer, the sun's embrace strengthens, particularly in Daegu, where May records an impressive 298 hours of sunshine. This upward trend continues into June, especially in Incheon, which basks in a remarkable 320 hours of sunlight. Such variations not only enhance the beauty of each locale but also reflect the increasingly warm and vibrant summers that South Korea experiences.
In South Korea, the likelihood of sunny weather exhibits notable seasonal variation, reflecting distinct regional climates. For instance, Gwangju experiences only an 18% chance of sunny days in July, a time typically marked by summer monsoons, which may dampen outdoor plans. In stark contrast, Ulsan boasts a much higher 77% likelihood of sunshine in December, suggesting a more favorable winter climate for those seeking outdoor activities. This contrast highlights how South Korea's diverse meteorological patterns can impact seasonal enjoyment, making it essential for both locals and travelers to consider regional weather trends when planning their activities.
In South Korea's Gangwon-do, the contrast in daylight hours between December and June highlights the region's seasonal variability. With just 9 hours of daylight in December, the winter months feel shorter and darker, creating a cozy atmosphere that encourages indoor activities. In stark contrast, June beams with about 14 hours of sunlight, inviting outdoor adventures and vibrant celebrations. This significant shift not only affects daily routines but also reflects the natural rhythm of life in Gangwon-do, where residents and visitors alike can savor the long, sun-soaked days of summer after enduring the chill of winter.
Busan experiences a vibrant range of temperatures throughout the year, with winters dipping as low as -11°C (13°F) in January, while the summer months can reach a sizzling 36°C (98°F). This coastal city also encounters significant rainfall, especially during the late spring and summer, peaking in July with an average of 258 mm (10.2 in). Additionally, humidity levels soar in the hotter months, often exceeding 90%, contributing to a lush environment. For those looking to explore all that this dynamic city has to offer, understanding the climate is essential—discover more about it in Busan climate.
Chungcheongnam-do, South Korea, experiences a diverse climate that showcases distinct seasonal shifts. Winters can be quite chilly, with temperatures dipping as low as -21°C (-6°F) in January, while summers bring the heat, soaring to a sizzling 40°C (105°F) in August. Precipitation is abundant during the warmer months, especially in July and August when heavy rains can accumulate over 230 mm (9 inches). The humidity levels are notably high in the summer, peaking around 91%, creating a steamy atmosphere. To explore more about the region’s unique climate, visit Chungcheongnam-do climate.
Daegu, South Korea experiences a diverse climate, with chilly winters where January temperatures can dip to -13°C (8°F), gradually warming up to sweltering summers that peak at 37°C (99°F) in July and August. Precipitation is abundant, especially during the summer months, with July receiving the heaviest rainfalls at 245 mm (9.6 in), contributing to its high humidity levels that soar to 95%. The transitional months of spring and autumn are particularly pleasant, offering mild temperatures and a tapestry of colors. For more insights on weather patterns throughout the year, check out Daegu climate.
Daejeon, South Korea, experiences a climate marked by distinct seasonal transitions, from frigid winters to sweltering summers. January's temperatures can plunge to a frigid -20°C (-4°F), while July and August bring sizzling highs of 39°C (103°F), accompanied by high humidity that often reaches 91%. Rainfall varies throughout the year, peaking in summer with a staggering 224 mm (8.8 in) in August, making these months both sticky and dynamic. As the year progresses, the city showcases a beautiful tapestry of weather, with crisp autumn days and a spring bloom that invites outdoor exploration. For a detailed look at the weather patterns throughout the year, check out Daejeon climate.
Gangwon-do, South Korea, experiences a dramatic climate that showcases the beauty of four distinct seasons. Winters can be frigid, with temperatures plummeting as low as -26°C (-14°F) in January, while summers warm up to a sizzling 37°C (99°F) in August. This region is characterized by substantial precipitation, particularly during the summer months, which see rainfall amounts peaking at around 239 mm (9.4 in) in August. With humidity levels soaring to 90% in July and August, visitors can expect a lush and vibrant landscape during these warm months. For more details on what to expect throughout the year, explore the comprehensive Gangwon-do climate.
Gwangju, South Korea experiences a diverse climate that shifts dramatically throughout the year. Winters are chilly, with January temperatures dipping as low as -22°C (-8°F) and an average around 1°C (33°F), while summers bring heat and humidity, peaking in July with average temps reaching 26°C (78°F) and a staggering 95% humidity. Rainfall peaks during the summer months, especially in July when it can be as high as 238 mm (9.4 in). Spring and autumn offer mild and pleasant weather, making it an ideal time to explore the city’s attractions. For more detailed information, check out the Gwangju climate.
Gyeonggi-do experiences a diverse climate marked by distinct seasonal changes. Winters can be frigid, with January temperatures dipping as low as -22°C (-7°F), while summers bring warmth and humidity, peaking in August at an average of 26°C (79°F). Precipitation varies throughout the year, with July and August witnessing the heaviest rainfall, making them the wettest months. The region's high humidity in summer can reach up to 91%, adding a tropical feel to the hot weather. For a deeper dive into the intricate details of the weather patterns, explore the Gyeonggi-do climate.
Gyeongsangbuk-do experiences a dynamic climate that shifts dramatically throughout the year. Winters can be quite harsh, with January temperatures plummeting to a chilling -19°C (-1°F), while summers are characterized by warmth and humidity, peaking in July and August with highs around 38°C (100°F). Rainfall is concentrated in the summer months, with July receiving the most precipitation at 239 mm (9.4 in), contributing to a humid environment. The spring and fall transitions offer milder temperatures and less rain, making them particularly pleasant times to visit. For detailed insights on the region’s climate, explore Gyeongsangbuk-do climate.
Gyeongsangnam-do experiences a diverse climate, characterized by cold winters and hot, humid summers. January kicks off the year with temperatures plunging to a chilly -20°C (-4°F), gradually warming up to 2°C (36°F), while July and August boast sultry highs reaching 37°C (99°F) and 38°C (100°F), respectively. This region sees the majority of its rainfall during the summer months, with July delivering a hefty 269 mm (10.6 in) of precipitation. Coupled with high humidity levels peaking at 95% in July, the air can feel particularly muggy during this time. For a deeper dive into the seasonal shifts, check out the Gyeongsangnam-do climate.
Incheon, South Korea, experiences a diverse climate, characterized by cold winters and warm, humid summers. January brings crisp temperatures with lows plunging to -17°C (2°F), while July and August can see highs soar to 36°C (98°F), accompanied by high humidity levels around 91%. The rainy season peaks during the summer, particularly in July, which receives over 200 mm (8.2 in) of rain, making it crucial for visitors to prepare for wet weather. As the seasons transition, colorful autumn foliage and milder temperatures in October add to the charm of this coastal city. To explore more about Incheon's weather patterns, visit Incheon climate.
The climate in Jeju-do, South Korea, offers a diverse range of temperatures and weather patterns throughout the year. Winters are mild but can dip as low as -3°C (27°F) in January, while summers are warm and humid, with highs reaching 32°C (91°F) in July and August. The island experiences its heaviest rainfall during the summer months, with August seeing nearly 226 mm (8.9 in) of precipitation. Humidity is a constant companion, peaking in the summer and contributing to the lush landscapes that characterize Jeju's beauty. For more detailed information, visit the Jeju-do climate.
Nestled in the heart of South Korea, Jeollabuk-do experiences a diverse climate marked by distinct seasons. Winters can be biting, with January temperatures plunging to a chilling -21°C (-6°F), while summers ignite with sweltering highs reaching up to 39°C (103°F) in August. This region also sees significant rainfall, particularly in July and August, where precipitation can exceed 255 mm (10.0 in), enhancing the lush landscapes. With humidity peaking at an impressive 95% during the summer months, visitors should be prepared for a tropical feel amid the vibrant scenery. For more details, check out the full breakdown of the Jeollabuk-do climate.
Jeollanam-do, South Korea, experiences a dynamic climate throughout the year, marked by distinct seasonal shifts. Winters can be particularly cold, with temperatures plunging as low as -22°C (-8°F) in January, while summers heat up with maxima reaching 37°C (99°F) in both July and August. The region sees its heaviest rainfall from June to September, culminating in a humid atmosphere, especially during the peak summer months when humidity levels soar to nearly 95%. Transition periods in spring and autumn offer milder temperatures, providing a refreshing contrast to the extremes of winter and summer. For a deeper dive into the climatic nuances of this beautiful region, visit Jeollanam-do climate.
North Chungcheong, South Korea, experiences a diverse climate that showcases the beauty of each season. Winters can be quite frigid, with temperatures dipping as low as -21°C (-5°F) in January, while summers peak around a scorching 39°C (103°F) in August. Rainfall is abundant, especially during the summer months, with July and August receiving over 200 mm of precipitation, contributing to high humidity levels that can reach 91%. The transition seasons of spring and autumn offer a comfortable respite, where temperatures are mild and landscapes burst into vibrant colors. For more details on this region's unique weather patterns, visit North Chungcheong climate.
Sejong-si, South Korea, experiences distinct seasonal variations that shape its climate throughout the year. Winters can be frigid, with January lows plunging to -18°C (0°F), while summers bring sweltering heat and humidity, peaking in July and August at averages around 26-27°C (79-81°F). The region receives most of its precipitation in summer, particularly during July and August, which can see up to 235 mm (9.2 in) of rain. As the seasons shift, visitors can enjoy vibrant springs and mild autumns, making it a year-round destination. For more detailed information, check out the Sejong-si climate.
Seoul experiences a continental climate that showcases a dramatic range of temperatures throughout the year. Winters can be quite cold, with January temperatures dipping as low as -18°C (1°F), while summers can reach scorching highs of 38°C (101°F) in August. Rainfall is abundant during the summer months, particularly in July and August, where it can exceed 250 mm (9.8 in), contributing to high humidity levels that hover around 91%. As the seasons shift, visitors can witness the stunning beauty of cherry blossoms in spring and vibrant foliage in the fall. For more detailed information, explore the Seoul climate.
Ulsan, South Korea, experiences a diverse climate that transitions dramatically throughout the year. Winter months, particularly January and February, chill the air with temperatures dipping as low as -12°C (11°F) and notable humidity above 60%, while spring brings a refreshing warmth and blossoms to life with averages rising to 14°C (57°F) in April. As summer rolls in, expect the heat to soar, with July and August peaking at 36°C (98°F) accompanied by high humidity levels that create a sultry atmosphere. Autumn showcases milder temperatures, with October averaging 17°C (63°F) and a drop in precipitation, making it a picturesque time to explore. For more insights on the seasonal shifts and patterns, visit the detailed Ulsan climate.
South Korea's climate exhibits striking contrasts, marked by frigid winters and sweltering summers that paint a vivid picture of its diverse weather patterns. January can bring chilling temperatures as low as -26°C in Gangwon-do, while August offers a stark shift, soaring to 40°C in Chungcheongnam-do. Precipitation varies dramatically throughout the year, with January in Incheon receiving a mere 17 mm, compared to the deluge of 296 mm seen in September on Jeju-do. Additionally, humidity levels fluctuate significantly, peaking at a suffocating 98% in July on Jeju-do and dipping to a more manageable 64% in March in Gangwon-do. These details highlight the dynamic nature of South Korea's climate, influencing not only daily life but also the country's rich cultural tapestry.