January weather forecast
South Korea

January is the coldest month of the year in South Korea, marked by low temperatures and frequent snowfall, especially in the northern regions and mountainous areas. Average low temperatures in Seoul, the capital, hover around -6°C (21.2°F), though temperatures can plunge below -10°C (14°F) during cold snaps. In contrast, Busan, located on the southern coast, experiences milder conditions with average lows around -1°C (30.2°F) and highs near 7°C (44.6°F).

In terms of precipitation, January tends to be one of the driest months of the year, but the little precipitation that does fall often comes as snow. Coastal areas and islands such as Jeju receive less snowfall due to their proximity to the sea, which moderates their climate. However, the mountainous regions can experience significant snow accumulation, making them popular destinations for winter sports enthusiasts.

Compared to December, January temperatures are slightly lower, and snowfall is generally more substantial, particularly in northern regions and mountainous areas. In contrast, February typically sees a slight increase in temperature, though it remains firmly within the winter season. The cold weather in January marks a stark contrast to the warm and humid conditions prevalent in South Korea from late spring to early autumn.

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• Seoul - January »
  In Seoul the month of January is known for its lowest average temperatures, reaching a high of 1.5°C (34.7°F) and a low of -5.9°C (21.4°F). On the last day of January, in Seoul sunrise is at 07:37 and sunset at 17:53 KST.
• Busan - January »
  In Busan during January, the rain falls for 4.6 days and regularly aggregates up to 14mm (0.55") of precipitation. In Busan during January, the rain falls for 4.6 days and regularly aggregates up to 14mm (0.55") of precipitation.
• Incheon - January »
  The coldest time of the year in Incheon is January, with temperatures averaging a high of 1.7°C (35.1°F) and a low of -5.4°C (22.3°F). Incheon's January weather reaches an average high of 1.7°C (35.1°F) and an average low of -5.4°C (22.3°F), making it the coldest month.
• Daegu - January »
  In Daegu in January, it is raining for 5 days, with typically 18mm (0.71") of accumulated precipitation. January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Daegu, South Korea.
• Daejeon - January »
  In Daejeon, South Korea, during January, the rain falls for 5.5 days and regularly aggregates up to 17mm (0.67") of precipitation. In Daejeon in January, during 7.8 snowfall days, 28mm (1.1") of snow is typically accumulated.
• Gwangju - January »
  In Gwangju during January, the rain falls for 6 days and regularly aggregates up to 11mm (0.43") of precipitation. January, having an average high-temperature of 3.5°C (38.3°F) and an average low-temperature of -3.3°C (26.1°F), is the coldest month in Gwangju.
• Ulsan - January »
  In Ulsan, South Korea, in January, during 0.5 snowfall days, 5mm (0.2") of snow is typically accumulated. Ulsan experiences its average lowest temperatures in January, reaching a peak of 4.8°C (40.6°F) and a minimum of -1.3°C (29.7°F).
• Suwon - January »
  On the first day of January in Suwon sunrise is at 07:45 and sunset at 17:24. Suwon records the coldest temperatures in January, averaging a high of 2.1°C (35.8°F) and a low of -7.4°C (18.7°F).
• Goyang - January »
  On the last day of January, in Goyang sunrise is at 07:37 and sunset at 17:54 KST. On the first day of January in Goyang sunrise is at 07:47 and sunset at 17:24.
• Gumi - January »
  With average temperatures fluctuating between a high of 4.3°C (39.7°F) and a low of -6.2°C (20.8°F), January stands out as the coldest month in Gumi, South Korea. On the first day of January in Gumi, sunrise is at 07:37 and sunset at 17:22.