Korea Travel

Korea Weather Guide: Seasons, Temperatures, Regional Differences and What To Wear

Korea has four clear seasons, but the weather can surprise first-time visitors. Spring mornings can still feel cold, summer is humid and rainy, autumn can shift quickly after sunset, and winter is dry, windy and much colder in northern inland areas. This guide explains Korea's seasonal weather, average temperatures, regional differences and what to pack for each season.

Four seasonal scenes in Korea showing spring, summer, autumn and winter — Korea is known for four distinct seasons. Photo: Korea.net / Korean Culture and Information Service, CC BY-SA 2.0 via Wikimedia Commons.

Quick Answer for First-Time Visitors

Best walking weather: spring from April to May and autumn from late September to November.
Hottest period: July and August, with high humidity and many days around or above 30°C / 86°F.
Rainiest period: summer, especially the rainy season from late June to late July in many years.
Coldest period: January, especially in Seoul, northern Gyeonggi-do, inland Gangwon-do and mountain areas.
Mildest winter areas: Busan, the southern coast and Jeju are usually milder than Seoul, but coastal wind can still feel sharp.
Most useful packing rule: bring layers in spring and autumn, breathable clothes and rain gear in summer, and serious winter outerwear from December to February.

This article uses climate normals and official travel guidance checked on August 21, 2026. Climate averages describe typical weather, not the forecast for your exact travel dates, so always check the Korea Meteorological Administration forecast shortly before departure.

What Korea's Weather Is Like Overall

Korea sits in the mid-latitudes and has a temperate climate with four distinct seasons. In simple travel terms, spring and autumn are usually the most comfortable seasons for walking, summer is hot and humid, and winter is cold and dry. The difference between summer and winter is large, especially in Seoul and inland regions.

According to Korea Meteorological Administration climate normals, Korea's annual average temperature varies widely by place, from about 7°C / 45°F in Daegwallyeong, a highland area in Gangwon-do, to about 15°C / 59°F in Busan on the southern coast. August is normally the hottest month, while January is normally the coldest.

Rain is also very seasonal. The national annual precipitation normal is about 1,306 mm, and summer alone accounts for more than half of the yearly total. That is why a Korea trip in July can feel completely different from a trip in October, even if the itinerary is the same.

Korea Weather by Season

Season	Months	Typical feel	What to prepare
Spring	March-May	Mild but changeable; March can still be cold in the morning and evening.	Layers, light jacket, comfortable walking shoes, sunglasses and a mask for dusty days.
Summer	June-August	Hot, humid and rainy; air conditioning indoors can feel strong.	Breathable clothes, compact umbrella, rain shell, sunscreen, hat and quick-dry socks.
Autumn	September-November	Clearer, cooler and great for walking; evenings become chilly by October and November.	Long sleeves, cardigan or jacket, light coat for late autumn, walking shoes.
Winter	December-February	Cold, dry and windy; below-freezing mornings are common in Seoul.	Padded coat, thermal layers, scarf, gloves, warm socks, winter shoes and lip balm.

Spring in Korea: March to May

Spring is one of the easiest seasons for a first Korea trip, but it changes quickly. March may still feel like the end of winter, especially in Seoul after sunset. By April, days are usually milder, flowers bloom across parks and palace areas, and outdoor sightseeing becomes comfortable. May can already feel warm during the day.

In Seoul, Korea Tourism Organization's city temperature table shows average highs rising from about 11°C / 52°F in March to about 24°C / 75°F in May. Average lows move from about 2°C / 36°F in March to about 14°C / 57°F in May. That range explains why visitors often need both a jacket and lighter clothes in the same suitcase.

Spring can also bring dry air and dusty days. If you have allergies, sensitive skin or asthma, check the air quality forecast and carry a mask. For most travelers, the best spring outfit is a T-shirt or thin knit under a jacket, with shoes comfortable enough for palace grounds, markets and subway stairs.

Summer in Korea: June to August

Korean summer is not only hot; it is humid. This matters because 30°C / 86°F in Seoul can feel heavier than the number suggests when you are walking through subway stations, markets and outdoor attractions. July and August are the most demanding months for visitors who are not used to humid weather.

In Seoul, average highs are around 28°C / 82°F in June and around 30°C / 86°F in August. Busan and Jeju are also humid, but the coast can feel different from inland cities because of sea breeze, wind and sudden rain.

The rainy season, called jangma in Korean, usually affects travel from late June into late July, although exact dates vary each year. Korea Meteorological Administration climate normals show that the rainy season tends to start first in Jeju, then in southern regions, then in central regions. Summer rainfall is a major part of Korea's yearly precipitation, so a foldable umbrella or light rain shell is not optional if you visit in this period.

For clothing, choose breathable shirts, loose trousers, shorts where appropriate, quick-dry socks and shoes that can handle wet pavement. Many indoor spaces use strong air conditioning, so a thin overshirt or cardigan can be useful even in July.

Autumn in Korea: September to November

Autumn is the season many travelers imagine when they picture Korea: clearer skies, comfortable walking weather, palace gardens, mountain trails and red-yellow foliage. September can still feel like late summer, but October is often the sweet spot for sightseeing.

Seoul's average high is still about 26°C / 79°F in September, but by November it drops to about 12°C / 54°F. Nights cool even faster, so it is easy to leave your hotel in warm daytime weather and return in a chilly evening. This is the season for flexible layers.

Pack long sleeves, a light jacket and comfortable shoes. If you plan to hike in national parks or visit mountain areas, add a warmer layer than you think you need. Mountain weather can turn cold earlier than Seoul or Busan, especially after sunset.

Winter in Korea: December to February

Winter in Korea can be beautiful, especially around snowy mountains, ski resorts, winter festivals and hot spring trips, but it is not a light-jacket season. Seoul winters are cold and dry, and wind can make the temperature feel lower than the forecast.

In Seoul, average lows are below freezing in December, January and February. January is normally the coldest month. Busan and Jeju are milder than Seoul, but they are not tropical winter escapes. Coastal wind, rain and indoor-outdoor temperature changes can still make travelers uncomfortable without warm layers.

Wear a padded coat or heavy wool coat, thermal innerwear if you will be outside for long periods, gloves, scarf, warm socks and shoes with grip. Korea's winter air is dry, so lip balm and moisturizer are practical items, not vanity items.

Regional Temperature Differences in Korea

Korea is not huge, but regional climate differences matter. Latitude, altitude, coastline, mountains and city layout all change how the weather feels. A Seoul-only packing list may not work perfectly for Jeju, Busan, Daegu or Gangwon-do.

Region	Weather personality	Traveler note
Seoul and nearby Gyeonggi-do	Large seasonal contrast: hot, humid summers and cold winters. Seoul's normal annual average temperature is about 12.8°C / 55°F.	Pack for the exact month. Seoul in January and Seoul in August feel like different destinations.
Busan and the southern coast	Milder winters than Seoul, humid summers and frequent coastal wind. Busan's normal annual average temperature is about 15.0°C / 59°F.	A wind-resistant layer helps near beaches, bridges and seaside viewpoints.
Jeju Island	Warmer and more maritime, with strong wind and high rainfall in some areas. Jeju City averages about 16.2°C / 61°F annually, while Seogwipo averages about 16.9°C / 62°F.	Bring a wind shell even outside winter. Weather can change between coast, oreum hills and Hallasan routes.
Daegu and inland basin areas	Hotter-feeling summers because heat can build in basin geography. KMA describes Daegu summers as prone to heat waves and tropical nights.	Plan midday breaks in summer, drink water often and choose accommodation with strong air conditioning.
Gangwon-do and mountain areas	Cooler because of altitude, with colder winters and more snow risk in mountain routes.	For ski resorts, hiking or sunrise viewpoints, pack warmer than you would for Seoul.

Seoul, Busan and Gwangju: Monthly Temperature Snapshot

For many visitors, the easiest comparison is Seoul versus southern cities. Korea Tourism Organization lists average monthly highs and lows for Seoul, Busan and Gwangju. The pattern is clear: Seoul has colder winter mornings, while Busan stays milder near the southern coast.

City	January average high / low	August average high / low	What this means
Seoul	2.1°C / -5.5°C 36°F / 22°F	30.0°C / 22.9°C 86°F / 73°F	Cold winter mornings, hot and humid late summer.
Busan	8.2°C / -0.1°C 47°F / 32°F	29.5°C / 23.7°C 85°F / 75°F	Much milder winter than Seoul, but humid in summer.
Gwangju	5.7°C / -2.7°C 42°F / 27°F	30.9°C / 23.2°C 88°F / 74°F	Warmer than Seoul in winter, very warm in high summer.

Rainy Season, Typhoons and Weather Alerts

If you are visiting Korea in summer, pay attention to rain. Jangma is the main rainy season, but heavy rain can also happen outside the official rainy-season window. Streets, palace paths and hiking trails can become slippery, and some outdoor events may change schedules.

Typhoons are another summer-to-autumn concern. Korea Meteorological Administration's long-term climate information says several typhoons affect Korea directly or indirectly in an average year. This does not mean your trip will be hit by a typhoon, but it does mean August, September and early autumn travelers should watch official alerts.

Use official weather sources before long travel days, island trips, mountain hikes or beach plans. For Jeju, ferry routes, Hallasan hiking and coastal activities can be affected by wind even when a city forecast looks mild.

What To Wear in Korea by Season

Spring Packing List

Light jacket or trench coat for April and May; warmer jacket for March.
Long-sleeve tops, thin knits and T-shirts for layering.
Comfortable walking shoes for palaces, neighborhoods and subway transfers.
Sunglasses, skin moisturizer and a mask for dry or dusty days.
Small umbrella if you are traveling for more than a few days.

Summer Packing List

Breathable shirts, light trousers, shorts and summer dresses where appropriate.
Compact umbrella or light rain jacket for sudden rain.
Sunscreen, hat and sunglasses for outdoor sightseeing.
Quick-dry socks and shoes that can handle wet pavement.
Thin cardigan or overshirt for strong indoor air conditioning.

Autumn Packing List

Long sleeves and light knitwear for September and October.
Cardigan, jacket or windbreaker for mornings and evenings.
Light coat for November, especially in Seoul or mountain areas.
Comfortable walking shoes for foliage routes and palace gardens.
Small daypack for layers as the temperature changes during the day.

Winter Packing List

Padded coat or heavy winter coat.
Thermal base layers if you will spend long hours outside.
Scarf, gloves, beanie or earmuffs.
Warm socks and shoes with grip for icy or snowy paths.
Moisturizer, lip balm and hand cream for dry air.

Before You Go: Weather Checks for Travelers

Before you go, check three things: the daily forecast, weather advisories and the temperature difference between day and night. Averages help you pack, but the forecast helps you decide what to wear tomorrow.

For city travel: check Seoul, Busan, Jeju or your exact destination, not only "Korea" as a country.
For mountains: check the mountain or national park area separately. Higher places can be much colder.
For Jeju: check wind as well as rain. Wind can affect flights, ferries and hiking comfort.
For summer: check heavy rain, heat wave and typhoon advisories.
For winter: check cold wave, snow and road conditions if you plan to drive or visit ski areas.

Best Season To Visit Korea

The best season depends on what you want to do. For first-time visitors who plan to walk a lot, spring and autumn are the easiest choices. April, May, October and early November are especially popular because the weather is usually comfortable and the scenery is strong.

Summer is better for beaches, water activities, festivals and travelers who do not mind humidity. Winter is best for skiing, snowy landscapes, hot springs, winter street food and quieter palace walks, as long as you are prepared for cold weather.

If you are sensitive to heat, avoid late July and August for heavy walking itineraries. If you are sensitive to cold, avoid January in Seoul and inland regions unless winter activities are the reason for your trip.

Common Weather Mistakes First-Timers Make

Assuming all of Korea feels like Seoul. Busan, Jeju, Daegu and Gangwon-do can feel very different.
Underpacking for winter. A fashion coat may not be enough for long outdoor sightseeing in January.
Ignoring humidity in summer. Breathable clothes matter more than stylish heavy fabrics.
Forgetting rain gear in July. Summer rain can be heavy, sudden and inconvenient for walking routes.
Not checking evening temperatures in spring and autumn. Daytime can be pleasant while night feels cold.
Planning mountain hikes from city weather only. Mountain routes need separate weather checks and warmer clothing.

FAQ

What is the coldest month in Korea?

January is normally the coldest month in Korea. Seoul often has below-freezing mornings, while Busan and Jeju are usually milder but still cool enough for winter clothing.

What is the hottest month in Korea?

August is normally the hottest month. July and August are also very humid, so travelers should plan lighter clothing, hydration breaks and indoor rest time.

When is Korea's rainy season?

The rainy season usually arrives from late June to late July, beginning earlier in Jeju and southern regions before central Korea. Exact dates change every year, so check the forecast before travel.

Does it snow in Korea?

Yes, Korea gets snow, especially in winter and especially in mountain areas. Seoul can also see snow, but snowfall amount varies by year. Gangwon-do and ski resort areas are more reliable for winter snow scenery.

Is Jeju warmer than Seoul?

Yes. Jeju is generally warmer and more maritime than Seoul, especially in winter. However, Jeju can be windy and rainy, so a windproof layer is useful even when temperatures look mild.

What should I wear in Korea in October?

October is usually one of the most comfortable months. Wear long sleeves, a light jacket or cardigan, and comfortable walking shoes. Add a warmer layer if you will be out late or visiting mountain areas.

Bottom Line

Korea's weather is one of the reasons the country feels different each time you visit. Spring is bright but changeable, summer is hot and rainy, autumn is clear and comfortable, and winter is cold and dry. Regional differences also matter: Seoul has stronger seasonal contrast, Busan and Jeju are milder in winter, Daegu can feel hotter in summer, and mountain areas need warmer planning.

For a first Korea trip, pack around your exact month and route. If your itinerary includes Seoul, Busan, Jeju and a mountain day, do not pack for just one weather pattern. A smart suitcase for Korea is flexible: layers for changing temperatures, rain gear for summer, wind protection for coasts and serious warmth for winter.

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