Seoul in december: average Weather, Temperature and Climate
Weather in Seoul in december 2026
The weather in Seoul in december comes from statistical datas on the last years. You can view the weather statistics for all the month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 102.9cm
Weather at 6am
31°F
Clear/Sunny
53% of time
22%
12%
9%
Weather at 12pm
36°F
Clear/Sunny
51% of time
21%
13%
10%
Weather at 6pm
34°F
Clear/Sunny
53% of time
21%
14%
10%
Weather at 3am
32°F
52%
19%
16%
10%
Evolution of daily average temperature and precipitation in Seoul in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Seoul in december.
The climate of Seoul in december is very bad
In december in Seoul, the climate is quite dry (with 1.5in of precipitation over 2 days). It should be noted an improvement from the previous month since in november it receives an average of 3.1in of rainfall over 4 days.
The climate is quite cold there the month of december. Do not forget to cover yourself! The high seasonal norm is 38°F. The seasonal minimum is 31°F. Thus, the mean temperature average on this month of december in Seoul is 34°F. Note that these seasonal averages are in contrast with those observed in Seoul in the month of december with a maximum record of 59°F in 2010 and a minimum record of 9°F in 2009. You can expect to have about 20 days with temperatures below 32°F, or 65% of the month.
Day length in Seoul in december is 09:35. The sun rises at 07:40 and sunset is at 17:15.
Seasonal average climate and temperature of Seoul in december
Check below seasonal norms These datas are generated from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 34°F | ||||
| Highest temperature | 38°F | ||||
| Lowest temperature | 31°F | ||||
| Highest record temperature | 59°F (2010) | ||||
| Lowest record temperature | 9°F (2009) | ||||
| Number of days at +65°F | 0 day(s) (0%) | ||||
| Number of days at -32°F | 20 day(s) (65%) | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 25°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 1.5in | ||||
| Number of days with rainfall | 2 day(s) (6%) | ||||
| Record daily rainfall | 1.5in (2016) | ||||
| Snowfall | 102.9cm | ||||
| Other climate data | |||||
| Humidity | 67% | ||||
| Visibility | 9.38km | ||||
| Cloud cover | 34% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 8 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:40 | ||||
| Time of sunset | 17:15 | ||||
| Length of day | 09:35 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Seoul in december 2025:
43°F to 50°F
34°F to 38°F
20°F to 27°F
20°F to 36°F
27°F to 34°F
31°F to 38°F
38°F to 52°F
34°F to 43°F
32°F to 45°F
36°F to 43°F
40°F to 45°F
31°F to 41°F
36°F to 40°F
31°F to 36°F
31°F to 40°F
38°F to 45°F
38°F to 45°F
34°F to 43°F
36°F to 43°F
43°F to 45°F
29°F to 34°F
29°F to 36°F
32°F to 40°F
32°F to 38°F
27°F to 31°F
14°F to 22°F
22°F to 32°F
31°F to 36°F
36°F to 43°F
31°F to 34°F
20°F to 25°F
Map: other cities in South Korea in december
Cities near Seoul:
| Goyang-si in december | very bad weather |
| Namyangju in december | very bad weather |
| Incheon in december | very bad weather |
| Ansan-si in december | very bad weather |
| Yangju in december | very bad weather |
| Hwaseong-si in december | very bad weather |
| Yangp'yong in december | very bad weather |
| Osan in december | very bad weather |
| Icheon-si in december | very bad weather |
| Namiseom (Nami Island) in december | very bad weather |
| Anseong in december | very bad weather |
| Chuncheon in december | very bad weather |
Click over cities on the map for information about the weather in december.
Seoul
perfect weather
good
tolerable
bad
very bad
Weather data for Seoul in december:
Weather data for Seoul for december are derived from an average of the weather forecast since 2009 in Seoul. There is a margin of error and these forecasts are to be considered as general information only. The weather in Seoul can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Seoul.