Weather in Seoul in January 2025
- January is usually the coldest month of the year in Seoul;
Average weather
Average temperature in Seoul in January
The temperature in January is +2°C on average, with a range between a maximum of +13°C during the day and a minimum of -17°C at night.
The average maximum temperature goes up 13% by the end of the month, compared with the beginning of the month, from +4°C to +8°C.
Is Seoul warm or cold in January?
Seoul is typically cool in January.
Maximum temperatures go down compared to the previous month from +4°C to +2°C. The minimum temperature also goes down from -5°C to -8°C.
Pack a sweater and a jacket as there will be cooler temperatures.
January is the coldest month in Seoul, here is the comparison with other months:
Climate in Seoul in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +4°C | +2°C | +5°C | ||||
| Min. temperature | ||||||
| -18°C | -23°C | -19°C | ||||
| Max. temperature | ||||||
| +17°C | +15°C | +19°C | ||||
| Rainfall | ||||||
| 15 mm | 10 mm | 16 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 65% | 63% | 61% | ||||
| Air pressure | ||||||
| 1024 HPa | 1024 HPa | 1022 HPa | ||||
| Sunny days | ||||||
| 13 | 14 | 13 | ||||
| Cloudy days | ||||||
| 10 | 10 | 9 | ||||
| Rainy days | ||||||
| 4 | 2 | 2 | ||||
| Snowy days | ||||||
| 4 | 5 | 3 | ||||
January weather is still as good as in December. It’s getting colder in January. From +4°C in the day, the average maximum temperature lowers to +2°C. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 15 mm to 10 mm. It feels drier, as humidity decreases from 65% to 63%. The average wind speed doesn’t change much during January, staying around 2 m/s. The good news is there are likely to be more sunny days in January, from 13 to 14.
February brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Seoul is gradually increasing during January, going from 3 m/s to 3 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Seoul.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Seoul?
Climate Change over Years
The climate in Seoul in January has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+15°C) and the highest in 2021 (+18°C). The driest year was 2001 with only 618 mm of rainfall, and the wettest year was 2020 with 1720 mm.
FAQ
Is January a good time to visit Seoul?
Can you sunbathe in Seoul in January?
Is Seoul rainy in January?
Is it sunny in Seoul in January?
Other cities in South Korea
Monthly weather in Seoul
Source of the data
For this page, we’ve looked at the typical weather in Seoul, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.