Last updated: October 15, 2026
The average December high in Seoul is about 39°F. The average low is about 26°F. On paper, that doesn’t look much worse than a New York winter. Then you step out of a subway exit near the Han River at 5:30 p.m., the sun is already gone, and a dry wind comes straight down the avenue. That’s when most of my friends from New York realize Seoul in December is its own kind of cold.
People ask me two things about a December trip: “How cold is it, really?” and “Is it worth going in winter?” My answer to the second one is yes, as long as you dress for the first one. December is when Seoul lights up its downtown for free, when street snacks you can’t get in summer come out, and when a slow pace makes the most sense, because the days are short and the warm places are where the city lives.
This guide covers the weather, what to wear in Seoul in December, what’s on, and how to plan days that don’t fight the cold.
Quick Answer: Seoul in December
- It’s cold and dry. Average highs run around 39°F and lows around 26°F, based on Korea Meteorological Administration normals. Late December is colder than early December.
- It rarely rains, and it snows only lightly. December averages less than an inch of precipitation. Snow falls on about six days, but it usually doesn’t stay on the ground in the city.
- The wind is the real issue. Seoul feels colder than the thermometer says, especially along the river, on bridges, and between tall buildings.
- The sun sets a little after 5 p.m. Plan outdoor sightseeing for the morning and early afternoon.
- Pack for layers: a long insulated coat, thermal base layers, a hat, gloves, and moisturizer. Pick up heat packs at any convenience store.
- The city is free and festive at night. In recent years, Seoul’s winter festival has run from mid-December into early January with lantern displays, a Christmas-style market, and a 1,000-won skating rink.
- Check your entry rules. If you land on or after January 1, 2027, the K-ETA rules change. Details are in my K-ETA guide for US citizens.
Seoul December Weather: The Real Numbers
Here’s what the long-term averages look like. The Seoul figures are the Korea Meteorological Administration’s 1991–2020 normals for central Seoul.
Two things stand out when you compare the columns. Seoul is several degrees colder than New York in December, and it’s much drier. New York’s cold tends to come with rain, slush, and gray skies. Seoul’s cold usually comes with blue skies and a wind that goes right through a thin coat. Bright, freezing days are normal.
Early vs. late December
December in Seoul gets colder as the month goes on, and the swing from week to week can be big. A cold wave from the northwest can drop overnight lows to around 10°F for a few days, and then a mild spell brings highs back into the 40s.
| Period | Typical high | Typical low | What it feels like |
|---|---|---|---|
| Early December | Low 40s°F | Upper 20s°F | Late fall in New York, but windier |
| Mid-December | High 30s°F | Mid-20s°F | Proper winter; gloves every day |
| Christmas to New Year’s Eve | Mid-30s°F | Low 20s°F | The coldest stretch of the trip |
These are rounded from historical daily records, so treat them as a guide, not a forecast. Check the forecast a few days before you fly.
Short days
The sun rises after 7:30 a.m. and sets a little after 5 p.m. through most of December. The winter solstice in Korea falls on December 22, 2026. That’s about the same daylight you get in New York, but it catches people off guard because everyone plans to “see the city” in the afternoon and finds it dark by the time they’re out of lunch.
Fine dust
Korea’s government runs a seasonal fine-dust management program every year from December through March, because that’s when air quality tends to get worse. December is usually not the worst month (spring is), but you’ll likely see a few hazy days. I’ll come back to this in the Reality Check section.
What to Wear in Seoul in December
If you remember one thing about what to wear in Seoul in December, make it this: dress for wind, not just temperature. A coat that’s fine for a still 35°F day in Manhattan can feel thin on a windy 35°F day in Seoul.
The coat
Look around any Seoul subway car in December and you’ll see the city’s winter uniform: the long padded coat that falls to the knee or below. Koreans call it a long padding. It’s not a fashion statement as much as a practical one. Covering your thighs makes a bigger difference than an extra sweater.
You don’t need to buy one. A warm, windproof parka that covers your hips will do. If your coat is short, plan on warmer pants.
Layers that come off easily
This is the part that surprises visitors. Korean buildings are heated, and often heated hard. Subway cars, cafes, department stores, and restaurants can feel warm enough to sweat in a winter coat. Many Korean restaurants also heat the floor itself, an old system called ondol, and some still have you sit on it.
So the goal isn’t to wear the thickest possible outfit. It’s to wear layers you can peel off in 30 seconds:
- Base layer: thin thermal top and leggings. You can buy them cheaply in Seoul if you forget.
- Middle layer: a sweater or fleece you don’t mind taking off and carrying.
- Outer layer: the windproof coat.
Shoes
- Warm, closed shoes with decent grip. Sidewalks and the steps at subway exits can ice over after a snow.
- Shoes that are easy to take off. Some restaurants with floor seating, guesthouses, and hanok stays ask you to remove your shoes. Laced boots get tiresome fast.
- Warm socks, and a spare pair if you’ll be walking all day.
Small things that matter more than you’d think
- Hat, gloves, and a scarf or neck warmer. Touchscreen gloves help, since you’ll be checking maps all day.
- Heat packs. Convenience stores sell disposable hand warmers called hotpack. Koreans use them constantly.
- Lip balm and a rich moisturizer. The combination of dry air outside and strong heating inside is hard on skin. Korean drugstores are a good place to stock up.
- A mask for hazy days. Korean pharmacies and convenience stores sell KF94 masks, the Korean equivalent of an N95-type filter mask.
Seoul in December: What to Pack (Checklist)
- Long, windproof insulated coat
- Thermal base layers (top and bottom)
- Sweater or fleece that’s easy to carry
- Hat, gloves, scarf or neck warmer
- Warm shoes with grip that slip on and off easily
- Wool socks
- Lip balm, moisturizer, hand cream
- A few masks for fine-dust days
- Phone data sorted before you land, since cold drains batteries and you’ll lean on maps:
- A small portable battery
- Card and a little cash for street food:
- Travel insurance, since slips on ice and winter colds happen:
What’s On in Seoul in December
The biggest shift in recent years is how much the city itself puts on in winter, and most of it is free.
| Event | Where | Recent dates (2025 edition) | Cost |
|---|---|---|---|
| Seoul Winter Festa | Six downtown sites, from Gwanghwamun Square to Cheonggyecheon, Seoul Plaza, DDP, Bosingak, and Uicheon | Dec. 12, 2025 – Jan. 4, 2026 | Mostly free |
| Seoul Lantern Festival | Along Cheonggyecheon Stream | Dec. 12, 2025 – Jan. 18, 2026 (extended), 6–11 p.m. | Free |
| Gwanghwamun Market | Gwanghwamun Square | Dec. 12–31, 2025 | Free entry |
| Seoul Light DDP (media facade) | Dongdaemun Design Plaza | Dec. 18–31, 2025 | Free |
| Seoul Plaza Skating Rink | In front of Seoul City Hall | Dec. 19, 2025 – Feb. 8, 2026 | 1,000 won per session |
| New Year’s Eve bell ringing | Bosingak, Jongno | Dec. 31 | Free |
The 2026 dates hadn’t been announced when I wrote this. The pattern for the past few years has been a mid-December start, and I’ll update this table once Seoul publishes the schedule.
Seoul Winter Festa ties the downtown events together. The 2024 edition drew about 5.4 million visitors, according to the city, so expect crowds on weekend evenings.
The Seoul Lantern Festival is my favorite thing to recommend to first-timers in December. You walk along Cheonggyecheon, the stream that runs through downtown below street level, and the lantern displays sit right on the water. It’s free, it’s flat, and the stream sits a little lower than the street, so it’s somewhat sheltered from the wind. The 2025 festival was so busy that the city extended it two weeks and kept it open until 11 p.m. Weeknights are calmer than weekends.
The Seoul Plaza skating rink has charged 1,000 won (well under $1) per session since it first opened in 2004. You can rent skates there, and helmets and knee pads are lent for free. Holders of the Discover Seoul Pass, a tourist pass for foreign visitors, have been able to skate for free.
New Year’s Eve at Bosingak is Seoul’s version of the Times Square ball drop: the old bronze bell in Jongno is struck 33 times at midnight. Like Times Square, it means hours in the cold with a huge crowd. I’d watch it on TV from somewhere warm, unless being there is the point of your trip.
Christmas in Seoul is a couples’ holiday
If you’re coming for Christmas, adjust your expectations. December 25 is a national holiday in Korea, and in 2026 it falls on a Friday, so you get a long weekend. But Christmas here isn’t mainly a family holiday the way it is in the US. For many young Koreans, Christmas Eve is a date night, closer to Valentine’s Day.
In practice, that means nice restaurants book up on December 24 and 25, popular cafes and photo spots get crowded, and couples fill the light displays. Department stores in central Seoul decorate their facades, and people line up to photograph them. If you want a quiet Christmas dinner, reserve well ahead or plan a simple meal and a late walk.
Dongji: the longest night
On December 22, 2026, Korea marks dongji (동지), the winter solstice. The tradition is to eat patjuk, a warm red bean porridge, sometimes with small rice cake balls. Many traditional porridge shops and some rice-cake shops sell it around this date. It’s a small, quiet way to see an old Korean custom that has nothing to do with tourism.
How to Plan Slow Winter Days in Seoul
The best December days in Seoul follow the light and the heat. Go out while the sun is up, warm up indoors in the afternoon, and come back out after dark when the lights are on.
| Time of day | What works in December | Why |
|---|---|---|
| Morning (9 a.m. to noon) | Palaces, neighborhood walks, markets | Best light, fewer crowds, sun on your back |
| Afternoon (noon to 4 p.m.) | Museums, cafes, bookstores, a long lunch | Warmest part of the day, but best spent partly indoors |
| Late afternoon (4 to 6 p.m.) | A bathhouse, a rest at your hotel | It gets dark and cold fast after 5 p.m. |
| Evening (6 p.m. on) | Lantern festival, light displays, a warm dinner | The city is at its best lit up |
Palaces in the morning
Seoul’s palaces are open year-round, and a sunny winter morning, especially after a light snow, is one of the best times to see them. Check winter hours before you go:
- Gyeongbokgung: 9 a.m. to 5 p.m. from November through February, last entry at 4 p.m. Closed on Tuesdays.
- Changdeokgung: 9 a.m. to 5:30 p.m. from November through January, last entry at 4:30 p.m. Closed on Mondays.
Go early. By 3 p.m. in December, the light is already low and the wind picks up.
Warm afternoons indoors
This is where slow travel in Seoul in December gets easy. The city has more places to sit somewhere warm than almost anywhere I know.
- Cafes. A two-hour cafe stop is normal in Seoul, and nobody will rush you. If you’re working or reading, my Seoul Cafe Etiquette guide covers the kiosks, Wi-Fi, and unwritten rules.
- Museums. The National Museum of Korea in Yongsan is large, warm, and has free admission to its permanent galleries. You can spend a whole cold afternoon there.
- A Korean bathhouse. A jjimjilbang is a public bathhouse with hot pools, heated rooms, and space to lie down. In winter, it’s how many Koreans spend a lazy Saturday. Read up on the etiquette before you go, since the baths are gender-separated and nude.
Neighborhood walks, timed right
The quieter old neighborhoods near the palaces, like Seochon to the west of Gyeongbokgung, are good for a slow winter walk. Bukchon Hanok Village is still home to residents, and parts of it now limit tourist visits to daytime hours to protect the people who live there, so plan Bukchon for midday. I’ll cover these neighborhoods in more depth in a separate guide.
Winter street food
Some of Seoul’s best snacks only really show up when it’s cold. Look for:
- Bungeoppang: fish-shaped pastries filled with sweet red bean, sold from small street stalls.
- Hotteok: a pan-fried pancake with melted brown sugar and nuts inside. Let it cool for a minute; the filling is very hot.
- Eomuk: fish cake on skewers in a hot broth. At many stalls, you can sip the broth while you eat.
- Roasted sweet potatoes and chestnuts from carts on busy corners.
Many of these stalls are cash only, so keep some small bills on you.
Traditional markets like Gwangjang Market are also good on a cold evening, since you sit at a counter and eat something hot while the cook works in front of you.
Reality Check: The Downsides of Seoul in December
December is a good time to visit, but it isn’t for everyone. Here’s what to expect.
- The cold limits your day. Realistically, you’ll spend two or three hours less outdoors than you would in spring or fall. If your dream trip is long hikes and picnics by the Han River, come in October or May instead.
- The wind on the river is serious. Han River parks and bridges are beautiful at sunset, and miserable in a December wind. Keep those visits short.
- Fine dust happens. Air quality varies from day to day. On hazy days, wear a mask outside and save indoor plans for those days. A Korean weather app or the air-quality section of Naver will show the daily level. Korea Travel Apps for Foreigners: The Best Apps for Your South Korea Trip in 2026
- Holidays bring crowds and higher prices. The week between Christmas and New Year’s is busy, especially downtown and in Myeongdong. Hotel rates tend to rise around both holidays, so book early: [AFFILIATE: hotel booking for Seoul]
- Festival dates change every year. The city announces the winter festival schedule only a few weeks ahead. Don’t plan an entire trip around one event until the dates are official.
- Late-December trips run into the K-ETA deadline. Korea’s temporary K-ETA exemption for Americans ends on December 31, 2026, Korea time. If you fly out of New York on December 31, you’ll land on January 1. Check the details in my [K-ETA guide].
- Overheated indoors, frozen outdoors. The constant switch between the two is tiring, and it’s when people catch colds. Hydrate, moisturize, and take the layers off when you go inside.
FAQ
Is December a good time to visit Seoul?
Yes, if you’re fine with cold weather and short days. You get clear skies, little rain, free winter light festivals, and winter street food. If you want long days outdoors, spring or fall is easier.
How cold is Seoul in December?
The average high is about 39°F (4°C) and the average low is about 26°F (-3°C). Late December is colder, and cold snaps can push overnight lows down to around 10°F. The wind makes it feel colder than the number.
What should I wear in Seoul in December?
A long, windproof insulated coat, thermal base layers, a sweater you can take off indoors, a hat, gloves, and warm shoes that slip on and off easily. Buildings are well heated, so dress in layers rather than one heavy outfit.
Does it snow in Seoul in December?
Sometimes. December averages about six days with snow, but it’s usually light and melts quickly in the city. A white Christmas is possible but not something to count on.
What is there to do in Seoul at Christmas?
Seoul usually runs its winter festival from mid-December, with the lantern festival along Cheonggyecheon, a Christmas-style market at Gwanghwamun Square, light displays, and the Seoul Plaza skating rink. Christmas is a public holiday and a popular date night, so reserve restaurants ahead.
The Bottom Line
Seoul in December rewards people who go a little slower. Dress for the wind, go out in the morning, spend the afternoon somewhere warm, and come back out after dark when the city lights up its stream and squares for free. It’s colder than New York, but drier and brighter, and the warm places in between are some of the best parts of the trip. Pack the long coat, keep some cash for a fish-shaped pastry, and check your arrival date if you’re flying in around New Year’s.