May weather forecast
South Korea

May is characterized by mild and pleasant weather in South Korea, making it a favored month for outdoor activities. In Seoul, the average low temperature increases to 12°C (53.6°F) while the average high reaches 22°C (71.6°F). The coastal city of Busan experiences a similar temperature range, with lows around 14°C (57.2°F) and highs averaging 22°C (71.6°F).

The amount of rainfall in May typically doubles from April, averaging 105mm (4.13"). However, the rainfall is usually spread across the month in the form of light to moderate showers, rather than concentrated downpours. This is the precursor to the rainy season, known as "jangma", which commences in late June.

Compared to April, May is warmer and slightly wetter, with the landscape growing lush from the increased rainfall. However, the temperatures and humidity are still comfortable, lacking the intensity of the summer heat and monsoon rains of the upcoming months. As the month progresses, late spring gives way to early summer, with temperatures and humidity levels steadily climbing, signaling the impending arrival of the hot summer season.

---

• Seoul - May »
  Throughout the year, in Seoul, there are 108.8 rainfall days, and 1451mm (57.13") of precipitation is accumulated. In Seoul, in May, during 9 rainfall days, 106mm (4.17") of precipitation is typically accumulated.
• Busan - May »
  In Busan during May, the rain falls for 7.8 days and regularly aggregates up to 37mm (1.46") of precipitation. A significant rise in sea temperature, to 16.8°C (62.2°F), supports activities such as fishing and boat rides along the Busan coastline.
• Incheon - May »
  In Incheon during May, the rain falls for 8.7 days and regularly aggregates up to 100mm (3.94") of precipitation. On the first day of May in Incheon sunrise is at 05:37 and sunset at 19:22.
• Daegu - May »
  In Daegu during the entire year, the rain falls for 112.8 days and collects up to 578mm (22.76") of precipitation. In Daegu, South Korea, in May, it is raining for 8.3 days, with typically 30mm (1.18") of accumulated precipitation.
• Daejeon - May »
  On the first day of May in Daejeon, South Korea, sunrise is at 05:36 and sunset at 19:18. Throughout the year, in Daejeon, there are 133.5 rainfall days, and 747mm (29.41") of precipitation is accumulated.
• Gwangju - May »
  In Gwangju snow does not fall in April through November. On the last day of the month, in Gwangju, sunrise is at 05:19 and sunset at 19:41 KST.
• Ulsan - May »
  In Ulsan during the entire year, the rain falls for 129.7 days and collects up to 902mm (35.51") of precipitation. The month with the most sunshine in Ulsan is May, with an average of 9.6h of sunshine.
• Suwon - May »
  On the first day of May in Suwon sunrise is at 05:36 and sunset at 19:21. In Suwon, in May, during 8.7 rainfall days, 98mm (3.86") of precipitation is typically accumulated.
• Goyang - May »
  Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. On the first day of May in Goyang, sunrise is at 05:36 and sunset at 19:22.
• Gumi - May »
  On the first day of May in Gumi sunrise is at 05:33 and sunset at 19:13. The month with the most sunshine in Gumi, South Korea, is May, with an average of 7.6h of sunshine.