December is the first full winter month in Seoul. The first ten days are cold but manageable, and from mid-month a padded coat and warm accessories are normal.
The sections below cover the practical questions: how cold it gets, how often snow is recorded, whether a white Christmas is realistic, and what to wear from a palace courtyard to a Namsan viewpoint. Official climate normals stay separate from events that change every year.
Quick answer
| Question | Answer |
|---|---|
| Is Seoul cold in December? | Yes. Average daily range -3.4 to 4.2 °C for the month (KMA 1991 to 2020 normals) |
| Early vs late | The first ten days average about 1.8 °C; the middle and last ten days average about -0.2 °C and -0.8 °C |
| Snow | Recorded on about 6 days in an average December; snow on the ground on a given date is not guaranteed |
| White Christmas | Possible in some years, never a promise, and not predictable from normals |
| Rain and melted snow | About 23 mm over roughly 8 days with precipitation in an average December |
| What to wear | Thermal or warm base layers, a padded or down coat for most people, hat, gloves, scarf, and shoes with grip |
| Christmas | Seasonal lights and decorations are typical; check the official schedule closer to your trip |
| Is it a good month? | Yes for palaces, markets, indoor culture, and night views; harder if you dislike cold |
If you are traveling around the end of November, the two months overlap. Late November is already close to winter, and the milder autumn side of the boundary is covered in Seoul in November.
December weather at a glance
These are the Korea Meteorological Administration's (KMA) 30-year climate normals (1991 to 2020) for its Seoul station, taken from the KMA Open Data Portal and rounded. They describe a typical December, not the forecast for your dates, and they do not describe mountain ridges.
| Measure, December | Seoul station normal |
|---|---|
| Average daily high | 4.2 °C |
| Average daily mean | 0.2 °C |
| Average daily low | -3.4 °C |
| Precipitation for the month | 22.6 mm |
| Days with precipitation (0.1 mm or more) | 7.8 |
| Days with snow | 6.4 |
| Days when the high stays below 0 °C | 6.3 |
| Days when the low falls below 0 °C | 23.4 |
| Days with a low below -10 °C | 2.6 |
| Days with a low of -12 °C or below | 0.7 |
| Average wind speed | 2.3 m/s |
| Sunshine for the month | 162.9 hours |
A normal is an average across many years, so a single December can be warmer, colder, snowier, or drier. The average low sits below freezing on most nights, and on about 6 days the temperature stays below freezing all day.
The precipitation figure counts rain and melted snow together, so it is not a measure of snow depth. Check the KMA forecast a few days before you fly, and again the evening before each outing.
Early versus late December
The month cools most between its first and second ten days. KMA publishes normals for each ten-day period, which is the most defensible way to compare early and late December without inventing averages.
| KMA ten-day period | Days | Mean | Average high | Average low | Precipitation |
|---|---|---|---|---|---|
| First ten days | 1 to 10 | 1.8 °C | 5.8 °C | -1.9 °C | 9.6 mm |
| Middle ten days | 11 to 20 | -0.2 °C | 3.7 °C | -3.8 °C | 5.6 mm |
| Last ten days | 21 to 31 | -0.8 °C | 3.2 °C | -4.4 °C | 7.4 mm |
The mean drops about 2 °C from the first to the middle ten days, and then only about 0.6 °C more by the end of the month. Mid and late December feel much alike on average, and both are colder than the start.
| Early December | Late December | |
|---|---|---|
| Feel | Cold, but many days are comfortable in a good coat | Steadily cold, with sharper mornings and nights |
| Snow and ice | Possible, less to plan around | Possible; icy stone and paths are likelier |
| Mood | Quieter, with the holiday season still ahead | Holiday season and year-end activity |
| Packing | Warm layers and a coat | Padded coat, thermal layer, hat, gloves, scarf |
Lean early if you want the mildest days. Lean late if the holiday atmosphere matters more than comfort. Either way, plan a warm stop for every outdoor block.
Day versus night
The average daily high is 4.2 °C and the average low is -3.4 °C, so a typical day spans about 8 °C. A sunny afternoon can feel tolerable while the same street feels much colder after dark.
The gap is why layers beat one heavy garment. Wear a base layer you can keep on all day and add the coat, hat, and gloves for the evening. This guide gives no hourly temperatures because the normals do not measure them.
Does it snow in Seoul in December?
Sometimes. In an average December the KMA station records snow on about 6 days, roughly one day in five. That does not mean six days of snow cover, because a snow day can be a brief dusting or flurry that melts within hours.
There are two separate questions. Snowfall occurring is fairly common in December, but snow lying on the ground, the kind that lines palace roofs and stays for photos, is less regular. It usually needs enough snow to fall and cold enough weather to keep it, and many Decembers offer a scattering of snow rather than a lasting layer.
Snow is possible but not guaranteed. A given December can have several snow days, or only a few small ones, and the normals cannot tell you which week. If you want the best odds of seeing a snowy landscape, the Korea winter travel guide covers the coldest months and other regions, and the Seoul winter itinerary plans winter days that do not depend on snow.
Will Seoul have a white Christmas?
Nobody can say in advance, so a white Christmas is never a promise. The normals give a monthly snow-day count, not the odds of snow on the ground on 25 December, so they cannot answer the question for a single date.
Some Christmases in Seoul are snowy and many are simply cold, dry, and clear. Treat snow as a bonus. Plan a Christmas trip around lights, food, palaces, and warm indoor time, and check the forecast a few days before the date.
Cold, wind, and dry weather
Cold is the main planning factor. With about 23 lows below freezing in an average December, and a few days that never rise above it, exposed time is what you need to manage.
The station's average wind speed is 2.3 m/s. That is a city average, so it does not tell you how windy Namsan, a river path, or a Bukhansan ridge will feel, and this guide gives no wind figures for them. Wind makes cold air feel colder, and open, elevated places feel it most.
December air is also dry, and heated rooms make it drier. Lip balm and a moisturizer are cheap additions to a pack, and a scarf over the face helps on a windy walk. Check the KMA forecast for cold or wind warnings before an outdoor day.
What to wear in Seoul in December
Dress in layers you can add and remove, because heated indoor spaces and freezing streets sit close together. A warm base layer, a mid-layer, and a windproof outer layer cover most days. This is practical guidance based on the climate data above, not a rule.
| Situation | What to wear |
|---|---|
| Early December, daytime | Sweater or fleece under a good coat; hat and light gloves for the morning |
| Late December, daytime | Thermal base layer, sweater, and a padded or down coat; hat, gloves, and scarf |
| Evenings and night | Add the scarf, hat, and gloves; it feels colder after dark and near open water or hills |
| Palaces | Warm layers, gloves, and shoes with grip; stone, gravel, and steps can be icy |
| Namsan walk | Windproof layer, warm gloves, and grippy shoes; the top is exposed |
| Bukhansan | Warm mid-layer, insulated outer layer, hat, gloves, spare layer, and traction gear if the notice calls for it |
| Hanbok day | Thermal base layers under the outfit and a coat you can carry; ask the shop what it offers |
Do you need a puffer or down coat? For most visitors in December, a padded or down coat is the practical choice, especially for late-month evenings and Namsan. In the first ten days, a wool coat over layers can be enough, and a very heavy parka can feel hot in heated cafes, stores, and subway cars.
The better test is whether you can add and remove layers. A moderate coat over a thermal layer and a warm sweater is more flexible than one heavy jacket you cannot take off.
Shoes and traction
Choose water-resistant shoes or boots with a grippy sole. Smooth-soled fashion shoes are a poor match for palace stone, wet snow, and icy steps. Warm socks matter more than a thicker shoe, and a spare pair is easy to carry.
Namsan and Bukhansan
Namsan is a short climb but an exposed one, so add a windproof layer and warm gloves for the top. The N Seoul Tower guide covers how to get there and what to expect on arrival.
Bukhansan is colder and windier than downtown, and daylight is short. Read the Bukhansan section below and the Bukhansan hiking guide before you go. For easier options, see Seoul mountain hikes by subway.
Hanbok in December
Wearing a hanbok near the palaces is possible in December, but it is a cold-weather outing. Hanbok is worn in layers, and the Seoul hanbok rental guide lists thermal base layers for winter and a coat you carry.
Outerwear policies differ by shop, so ask before you book instead of assuming a coat, gloves, or warm shoes are included. The same guide covers palace entry for hanbok wearers.
Packing checklist
- Thermal or warm base layers, long-sleeve tops, and a sweater or fleece
- A padded or down coat, or a warm coat you can layer under
- Hat, gloves, and a scarf or neck warmer
- Water-resistant shoes or boots with grip, plus warm socks
- A windproof outer layer for Namsan and river paths
- Lip balm and moisturizer, since heated rooms and winter air are dry
- Compact umbrella or hooded shell for wet snow
- Daypack for shedding layers indoors
- A power bank, because cold drains phone batteries faster
- Slip-on indoor shoes or clean socks for places where shoes come off, such as some restaurants and bathhouses
Christmas in Seoul
Seoul typically dresses up for Christmas, with lights and decorations in central areas and stores. Where, when, and how big changes from year to year.
This guide does not list dates, locations, prices, or schedules for any 2026 event, because none were confirmed by an official source when it was last verified. Seasonal programs vary by year, so check the official schedule closer to your trip on the Seoul city and Visit Seoul pages.
A December evening walk downtown can be enough: lights show best after sunset, and the cold is the main cost. Bring your warm layers, plan a hot drink stop, and keep the evening loose, since crowds and lighting vary by the day.
For food, markets, and indoor stops after dark, see the Seoul at night guide. Christmas Eve and Christmas Day can be busy in popular areas, so book any restaurant you care about and keep a backup.
New Year's Eve
Seoul's city government has held a bell-ringing ceremony at Bosingak in Jongno at midnight on 31 December for many years. It can draw large crowds, and details, access, and program change each year. If you want to go, check the city's announcement for the current year rather than relying on an earlier year's plan.
Best things to do in Seoul in December
December favors palaces on clear winter days, warm indoor culture, markets, and night views. Pick by weather on the day, and keep a warm plan for each outdoor plan.
| Choice | Why it suits December | Read more |
|---|---|---|
| Gyeongbokgung | Large grounds that look clean and quiet on a clear day; dress for icy stone | Gyeongbokgung guide |
| Changdeokgung | The Huwon rear garden is a timed visit among bare trees and, after snow, white roofs | Changdeokgung guide |
| Deoksugung and Seoul Plaza | A palace in the city center next to the plaza where holiday lights have appeared in past years | Palace night viewing |
| Bukchon | Hanok lanes that can be quiet in winter, with strict residential rules | Bukchon guide |
| N Seoul Tower | Cold, clear evenings can give a sharp night view | N Seoul Tower guide |
| Indoor museum | A long, warm visit on the coldest day | National Museum of Korea |
| Bathhouse | A warm rest after a cold day, with etiquette to learn first | Jjimjilbang guide |
| Covered market | Food and warmth in one stop | Gwangjang Market guide |
The palace guides cover hours, closed days, and Huwon reservations, so this page does not repeat them. Palace hours change by season, and the palace night viewing guide covers evening programs, which run on a schedule that changes.
Palaces and cold days
Palace visits are shorter in the cold, and that is fine. Plan one or two palace hours with a warm stop next to it, and treat the outdoor time as the part of the day you shorten if the wind picks up.
N Seoul Tower and night views
Winter air can be clear, and the view from Namsan can carry on a cold evening. Haze or fine dust can flatten it, so check conditions the same day. The top is exposed, so dress for it.
Indoor options for cold days
A museum, a covered market, a bathhouse, or a long meal keeps a freezing day useful. The Seoul travel guide lists more indoor choices, and the Seoul winter itinerary builds full days around them.
Bukhansan in December
Bukhansan is a winter mountain in December, colder than downtown and often icy on granite. Daylight is short, and the park sets entry windows. According to the Korea National Park Service, published windows for many Bukhansan control points run roughly 04:00 to 16:00 from December to February, and the exact window depends on your trailhead.
Confirm the current window and any trail notices on the KNPS pages before you go. Bring traction gear if the notice or trail report mentions ice or snow, start early, and be ready to turn around. The Bukhansan hiking guide covers routes and safety, and it is the place to start if you have not hiked in Korea before.
Daylight and planning
Days are at their shortest around the winter solstice in late December, so the light for photos and outdoor time runs out early. There is no single sunset time for the month, because it changes from day to day.
The Korea Astronomy and Space Science Institute publishes sunrise and sunset times for Seoul, so look up your own dates and put outdoor plans in the middle of the day.
Air quality
Fine dust and haze can appear in winter and flatten a city view even on a dry day. Check the daily air-quality reading before a viewpoint or mountain outing, and keep a Plan B that does not depend on the view.
Heating and indoor temperature
Subways, cafes, stores, and many buildings are heated, and some feel warm compared with the street. Wear layers you can take off, and keep the coat over your arm rather than sweating in it.
If a place feels too hot, remove a layer before you go back outside, since going out damp in cold air feels worse. Keep your hat and gloves in your bag for quick access.
Is December a good time to visit Seoul?
Yes, for travelers who want winter atmosphere, palaces, markets, indoor culture, and night views, and who will pack for the cold. It is a weaker choice if you dislike freezing temperatures, need a reliable snow scene, or want to avoid holiday-season crowds.
Early December is milder. Late December has the holiday mood and the coldest days, and it suits travelers who dress for it.
Common mistakes
- Packing for the daytime high and ignoring nights that average below freezing
- Expecting snow or a white Christmas as a promise
- Wearing smooth-soled shoes on icy palace stone
- Wearing one heavy coat with no layers underneath for indoor heat
- Planning long outdoor blocks with no warm stop
- Assuming the city weather applies to Namsan or a Bukhansan ridge
- Starting a Bukhansan hike late without checking entry windows and sunset
- Assuming a 2026 Christmas program or its dates from an older year
- Ignoring the shop's outerwear policy before a hanbok day
Frequently asked questions
Is Seoul cold in December?
Yes. The KMA normals give an average daily range of -3.4 to 4.2 °C for the month, with lows below freezing on most nights.
What is the average temperature in Seoul in December?
The KMA 1991 to 2020 normal for the Seoul station is a mean of 0.2 °C, with an average high of 4.2 °C and an average low of -3.4 °C. These are averages, not a forecast.
Is early or late December colder in Seoul?
Late. The first ten days average a mean of 1.8 °C, the middle ten days -0.2 °C, and the last ten days -0.8 °C. Most of the drop happens between early and mid December.
Does it snow in Seoul in December?
It can. The KMA normals show about 6 snow days in an average December, but a snow day can be a light flurry, and a given year may have more or fewer.
Will Seoul have a white Christmas?
It cannot be promised or predicted from normals. Some years bring snow near Christmas and many do not, so plan around lights and warm indoor time and treat snow as a bonus.
How much does it snow in Seoul in December?
The normals count snow days, not depth. Snow days do not equal snow cover, so check the forecast close to your dates.
What should I wear in Seoul in December?
Thermal or warm base layers, a sweater, a padded or down coat for most people, a hat, gloves, a scarf, and shoes with grip. See the what to wear section for a breakdown.
Do I need a down jacket in Seoul in December?
Most visitors are more comfortable in one, especially for late December evenings and Namsan. In early December, a wool coat over layers can be enough, and very heavy parkas can feel hot indoors.
Is Seoul windy in December?
The station's average wind speed is 2.3 m/s. Exposed places such as Namsan and mountain ridges can feel colder and windier than downtown, and the station number does not measure them.
What are the best things to do in Seoul in December?
Palaces on clear days, night views from Namsan, markets, museums, and warm indoor stops. Pick by weather on the day, and keep a plan for a cold or snowy day.
Are there Christmas lights and markets in Seoul in December?
Seoul typically has seasonal lights and decorations, but this guide does not list dates or locations for 2026 because none were confirmed. Check the official schedule closer to your trip.
Is Bukhansan open for hiking in December?
The park allows hiking, but with winter entry windows, short daylight, and ice. Check the KNPS notices for your trailhead before you go.
Is Seoul good for a Christmas trip?
Yes if you want lights, food, and city walks in the cold, and less so if you expect a snow scene. Book restaurants ahead for Christmas Eve and Christmas Day.
Can I wear hanbok in Seoul in December?
Yes, with thermal layers underneath and a coat you can carry. Ask the rental shop what outerwear it offers instead of assuming.
Is December a good time to visit Seoul?
Yes for winter city travel, with the caveat that it is cold and snow is not guaranteed. Early December is milder, and late December has the holiday mood and the coldest days.
Check before you go
- KMA forecast and any cold-wave, snow, or wind warnings near your dates
- Seoul city and Visit Seoul pages for this year's Christmas and year-end programs
- Palace, Namsan, and Bukhansan notices for hours, closures, and entry rules
- Sunrise and sunset times for each of your days
- The daily air-quality reading before a viewpoint or mountain day
Sources
- Korea Meteorological AdministrationOfficial weather service
- Korea Meteorological Administration Open Data Portal: 1991 to 2020 climate normals (Busan and Seoul stations)Official weather service
- Korea National Park Service — Bukhansan National ParkOfficial government site
- Korea National Park Service: mountain entry time designationOfficial government site
- Royal Palaces and Tombs Center, visiting hours (official)Official government site
- Seoul Metropolitan Government (english.seoul.go.kr)Official government site
- Visit Seoul, Seoul Tourism Organization (official)Official tourism site
- Visit KoreaOfficial tourism site
- Korea Astronomy and Space Science Institute: sunrise and sunset timesOfficial government site
Information is compiled from official sources. Details such as prices, hours, and schedules can change. Confirm time-sensitive facts before you travel.
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