Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
Cheonan Weather in December
Cheonan in December averages 6°C (43°F) during the day and -4°C (25°F) at night. This is part of the winter season. Some snow/rainfall is to be expected.
Rainfall in Cheonan in December
On average, there are about 9 days with snow/rain during this month, averaging 28 mm (1.1 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Cheonan in December
Daytime temperatures in Cheonan reach 6°C (43°F) in December, dropping to -4°C (25°F) at night. December is a notable month of the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At -4°C (25°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating.
Sunshine in Cheonan in December
The city usually sees around 159 hours of sunlight, indicating a moderately sunny period.Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May and October typically offer the best weather for Cheonan.
Cheonan Temperature in December
Min Temperature
-4°C (25°F)
Max Temperature
6°C (43°F)
Chance of Rain
31%
Precipitation
28 mm (1.1 in)
Rainy days
9 days
Humidity
72%
Sunshine
159 hours
Percentage Sunshine
53%
Cheonan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Cheonan - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cheonan typically drop from around 7°C (45°F) at the start of December to approximately 3°C (37°F) by the end. Nights are very cold, with lows typically ranging from -8°C (18°F) to -2°C (28°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 records for Cheonan in December
Browse day-by-day weather records for Cheonan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cheonan historical weather extremes in December
According to our 49 years of weather records for Cheonan, the following extremes were recorded between 1976 and 2025.
- Cheonan recorded its highest December temperature of 19°C (66°F) on December 9, 2023.
- Nighttime temperatures dropped to -20°C (-4°F) on December 27, 1980, marking the coldest December night on record.
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Cheonan in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Pack a light rain jacket or compact umbrella for occasional showers. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Cheonan in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming5/10 -
Cycling4/10 -
Walking4/10 -
Camping2/10 -
Outdoor sports4/10
Cheonan 3-Day Forecast
More climate data for Cheonan
Temperature Rainfall Sunshine Humidity
See the full Cheonan climate overview or explore weather in South Korea.
Popular in December
Where to go in December - average daytime high across popular destinations.
Jeju
12°C (54°F) Seogwipo
12°C (54°F) Busan
11°C (52°F) Gyeongju9°C (48°F) Jeonju8°C (46°F) Suwon6°C (43°F) Incheon6°C (43°F) Seoul5°C (41°F) Bucket list
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