Seoul Weather in December
December in Seoul averages 5°C (41°F) during the day and -5°C (23°F) at night. Around 25 mm (1 in) of snow/rainfall is typical for this time of year.
Rainfall in Seoul in December
You can expect snow/rain on roughly 7 days based on historical data, averaging 25 mm (1 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Seoul in December
Temperatures in Seoul in December top out at 5°C (41°F) and drop to -5°C (23°F) overnight. Experience the winter season in December. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows of -5°C (23°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated.
Sunshine in Seoul in December
The city usually sees around 163 hours of sunlight, indicating a moderately sunny period.
Wind Speed in Seoul in December
December sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.If you prefer dry days with pleasant temperatures, May and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seoul's climate page.
Seoul Temperature in December
Min Temperature
-5°C (23°F)
Max Temperature
5°C (41°F)
Chance of Rain
24%
Precipitation
25 mm (1 in)
Rainy days
7 days
Humidity
58%
Windspeed
2 m/s (4 knots)
Sunshine
163 hours
Percentage Sunshine
49%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seoul typically drop from around 6°C (43°F) at the start of December to approximately 2°C (36°F) by the end. Nights are very cold, with lows typically ranging from -8°C (18°F) to -3°C (27°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Seoul in December
Browse day-by-day weather records for Seoul spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seoul historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Seoul.
- The hottest December day on record in Seoul reached 17°C (63°F) (December 4, 2002).
- On December 26, 1976, Seoul saw its coldest December day with temperatures maxing out at -10°C (14°F).
- The coldest night in December in Seoul was on December 27, 1976, with a minimum of -18°C (0°F).
Best Places in South Korea in December
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Seoul in December
Dress warmly and in layers for your trip to Seoul in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Light rain is possible, so consider bringing a small umbrella or rain jacket. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Seoul in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seoul's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Seoul climate overview or explore weather in South Korea.
