How cold is Seoul in winter?

January has an average low of -5.5°C in the KMA 1991–2020 normals. Cold spells can take mornings below -10°C; wind makes exposed streets feel colder.

When does Korea issue a cold-wave advisory?

From October to April, an advisory can follow forecasts of lows at or below -12°C for at least 2 days; the warning threshold is -15°C. Sudden temperature drops can also trigger alerts.

Are warming shelters open all night?

Ordinary shelters follow the hours of their host facility. Seoul designated 61 emergency shelters for 24-hour operation during cold-wave alerts in winter 2025–26; check the current map.

Where can I buy heat packs?

Daiso, convenience stores and station shops sell them. Daiso examples span ₩1,000–5,000 per pack, depending on type and quantity. Never put a pack directly against skin or use one while asleep.

Seoul Winter Survival: Layers, Heat Packs and Shelters

The short answer

Seoul’s January average low is -5.5°C. Pack for mornings below -10°C during a cold spell.
Wear a thermal base layer, removable middle layer and insulated coat. Daiso heat-pack examples cost ₩1,000–5,000 per pack; pack sizes differ.
Ordinary warming shelters have individual hours. Emergency shelters are a separate service activated during cold-wave alerts.
Daylight and admission cutoffs matter: Gyeongbokgung stops winter entry at 16:00.

Seoul winter is dry and windy. The useful local habit is to plan warm stops between outdoor visits: dress in layers, keep gloves handy and leave the exposed river walk for another day when an alert is in force.

How cold does Seoul actually get?

January is the coldest month. A monthly average hides sharp cold spells: a mild winter overall can still contain several very cold mornings.

-5.5°C

January average low, KMA 1991–2020 normals

-13.2°C

Lowest Seoul temperature in winter 2025–26, 2026-01-22

Mornings at or below -10°C in winter 2025–26; SeoulWindow count of KMA daily observations

Seoul winter climate normals, KMA 1991–2020

Month	Mean	Mean high	Mean low	Precipitation
December	0.2°C	4.2°C	-3.4°C	22.6mm
January	-1.9°C	2.1°C	-5.5°C	16.8mm
February	0.7°C	5.1°C	-3.2°C	28.2mm

SeoulWindow calculation: December–February daily lows at or below -10°C, Seoul station 108

Winter	Days	Lowest temperature
2022–23	10	-17.3°C (2023-01-25)
2023–24	10	-14.7°C (2023-12-22)
2024–25	7	-12.2°C (2025-01-10)
2025–26	11	-13.2°C (2026-01-22)

What does “feels like” mean?

KMA’s winter wind-chill calculation uses air temperature and wind. At -10°C with wind of 5.6m/s, the calculated temperature is about -18°C. This is a calculated sensation index, not a change in the thermometer reading.
A seasonal outlook cannot predict the weather on your travel dates. Check the short-range forecast and alerts before heading out.

When are cold-wave advisories and warnings issued?

The alert uses air temperature, not the winter wind-chill number. KMA’s current criteria apply from October to April. Either condition in the table can trigger an alert.

KMA cold-wave temperature criteria, rechecked 2026-10-16

Alert	Sudden drop	Sustained cold
Advisory	Morning low falls at least 10°C from the previous day, to 3°C or lower, and is at least 3°C below normal	Morning lows of -12°C or lower expected for at least 2 days
Warning	Morning low falls at least 15°C from the previous day, to 3°C or lower, and is at least 3°C below normal	Morning lows of -15°C or lower expected for at least 2 days

An alert can therefore occur in autumn even above freezing. Seoul’s emergency shelters and ordinary daytime shelters have different operating rules; do not assume every shelter stays open overnight.

What should you wear in Seoul in winter?

Build warmth in layers you can remove. Heated trains and cafés can feel hot in a thick sweater. A thermal base layer, light middle layer and long padded coat make indoor stops easier.

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Long padded coat

A long insulated coat covers more of your legs.

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Thermal layers

HEATTECH, TOPTEN On Air and SPAO Warmtech are familiar options; check current stock.

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Fleece-lined trousers

Useful when ordinary jeans leave your legs cold.

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Covered neck and ears

A scarf, ear-covering hat and gloves make exposed walks more comfortable.

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Heat packs

Use over clothing, following the label. More heat is not always safer.

Budget bands and buying checks; official-store examples, not guaranteed prices

Item	Price guide	What to check
HEATTECH tops	₩16,900–34,900	Regular, Extra Warm and Ultra Warm examples; promotions and sizes vary
Thermal leggings and tights	₩16,900–34,900	Choose a removable layer; the brand listing includes several warmth levels
Socks	Check the current product page	Fit inside your shoes without making them tight
Touchscreen gloves	₩1,000–5,000	Daiso examples recorded 2026-10-08; check seasonal stock
Neck warmers	₩1,000–3,000	Daiso examples recorded 2026-10-08
Ear warmers	₩1,000–3,000	Daiso examples recorded 2026-10-08

Practical tip

Open or remove your coat indoors before you start sweating. Damp clothes feel colder outside.
Keep gloves on when checking maps; touch-compatible fingers help. Cover your ears and neck, and wear shoes with tread.
TOPTEN and SPAO prices could not be rechecked reliably. Compare their official shops before buying.

Where can you buy heat packs, and how do you use them?

Daiso and convenience stores are easy places to look. Compare the number of packs as well as the shelf price; a multi-pack price is not a price per heat pack.

Heat-pack types; Daiso examples recorded 2026-10-08, seasonal stock varies

Type	Example	Budget	Label information	Use
Shake-activated	Large pocket warmer	₩1,000–5,000 per retail pack	Some labels state up to 70°C and 16 hours	Coat pocket
Pocket packs	Small multi-pack	₩1,000–5,000 per retail pack	Check the actual label	Pocket
Adhesive	Small multi-pack	₩1,000–5,000 per retail pack	Wear over clothing	Back or waist over a layer
Adhesive bulk pack	15-pack example	₩1,000–5,000 per retail pack	One listing states 60°C and 12 hours	Compare pack quantities
Foot warmer	Toe or insole type	₩1,000–5,000 per retail pack	Use only as directed	Over socks, if the label permits
Rechargeable	Battery hand warmer	Check the retailer	Lithium battery inside	Check airline battery rules before flying

Avoid low-temperature burns

Never apply a heat pack directly to skin, sleep with one, or combine it with a heated floor or electric blanket.
Check your skin regularly and remove the pack if it feels uncomfortable. Stop using it if redness or pain develops; seek medical help for a suspected burn.
Convenience-store prices and current bathhouse entry fees were not verified. Check the shop or facility instead of budgeting from a fixed price.

Where can you warm up outdoors?

Look for heated bus-stop seats, windbreaks and designated warming shelters. The figures below describe winter 2025–26. They are not a promise of the same provision in 2026–27.

Seoul winter 2025–26 facilities; city announcement dated 2025-12-12

Facility	Number	How it works
Heated seats	4,624	Warm bus-stop seating
Windbreak tents	409	Sheltered waiting spaces
Windbreak screens	332	Barriers against the wind
Cold-weather shelters	1,504	Count as of 2025-12-10; each facility has its own hours
Climate companion shelters	452	192 bank branches, 34 convenience stores and 226 KT shops
Emergency shelters	61	24-hour operation during cold-wave alerts under the 2025–26 plan

Find an open shelter

Use Seoul Safety Nuri and distinguish cold-weather shelters from emergency shelters. Check today’s hours before travelling to one.
The Ministry of the Interior and Safety expanded shelter partnerships in 2026 to banks, railway operators and retailers. This does not make every branch a shelter or require every site to open all night.
No 2026–27 Seoul winter plan was found as of 2026-10-16. The previous plan began in mid-November; recheck the city’s November announcements. Local shelter names and heated-seat settings can vary.

Underground shopping passages block the wind, while a jjimjilbang offers a longer indoor break. A closed station or shopping arcade is not an overnight refuge. For a room that feels too hot, see the ondol controls guide.

What cold-weather health and safety signs matter?

Take confusion, slurred speech, severe shivering and numb or unusually pale skin seriously. Move to warmth and call 119 for an emergency; do not leave an affected person alone.

Cold illness is not limited to older people

KDCA reported 364 cold-related emergency cases and 14 suspected deaths in winter 2025–26. Its surveillance covered 512 emergency departments; 79.7% of cases were hypothermia and 75.0% occurred outdoors.
Avoid the combination of alcohol, late-night walking and freezing weather. If clothes are wet, change into dry layers and use blankets while seeking help. Follow medical advice for frostbite rather than rubbing the skin.

After snow, take short steps on shaded slopes and station stairs, keep your hands out of your pockets and choose shoes with grip. Lip balm and moisturiser help with dry indoor air. Keep your phone in an inside pocket: Apple warns that very cold conditions can temporarily shorten battery life or shut the device down.

How should you plan a winter sightseeing day?

Put outdoor visits in the daylight hours and check last admission. Early December sunset is around 17:13–17:14; a palace can stop admitting visitors well before closing.

Seoul sunrise and sunset, KASI calculations for winter 2026–27

Date	Sunrise	Sunset	Note
2026-12-01	07:28	17:14	Earliest sunset is 17:13 around December 6–7
2026-12-22	07:43	17:18	Winter solstice
2027-01-01	07:47	17:24	Latest sunrise is 07:47 around December 31–January 12
2027-01-31	07:37	17:54
2027-02-15	07:22	18:11	Sunset is after 18:00 from February 6
2027-02-28	07:06	18:24

Royal Palaces and Tombs Center winter opening hours; holiday exceptions may apply

Site	Opening hours	Last admission	Regular closure
Gyeongbokgung	09:00–17:00 (November–February)	16:00	Tuesday
Changdeokgung	09:00–17:30 (November–January)	16:30	Monday
Jongmyo	09:00–17:30 (November–January, general visiting days)	16:30	Tuesday
Deoksugung	09:00–21:00	20:00	Monday
Changgyeonggung	09:00–21:00	20:00	Monday

📍 Open in Naver Map — Gyeongbokgung

📍 Open in Naver Map — Changdeokgung

📍 Open in Naver Map — Jongmyo

📍 Open in Naver Map — Deoksugung

📍 Open in Naver Map — Changgyeonggung

Check both weather and air quality before leaving. The last winter fine-dust management period ran from December to March; the 2026–27 detailed announcement was not found, so do not treat last season’s measures as the new plan.

What could a day below -10°C look like?

Start slowly, choose one outdoor stop and keep a warm alternative ready. The route below is an example, not a safe exposure-time prescription.

A flexible cold-day itinerary

Time	Plan	Reason
Before 10:00	Indoor breakfast and a later start	Avoid a long wait in the early cold
10:00–12:00	Museum or gallery	Start indoors
12:00–15:00	One palace or market	Use daylight; Gyeongbokgung last entry is 16:00
15:00–17:00	Snack and café break	Warm up before sunset
17:00–19:00	Indoor mall or exhibition	Reduce exposed walking
After 19:00	Brief Deoksugung or Changgyeonggung visit, or a bathhouse	Palace last admission is 20:00; shorten the outdoor option if needed

Packing checklist

Thermal tops and bottoms, an insulated coat, gloves, scarf and an ear-covering hat.
Grippy shoes, warm socks, lip balm, moisturiser and a power bank.
Arrange warm stops and change the plan when the forecast or your condition calls for it.

Sources