South Korea Weather: Cloudy Skies and Rain Expected Nationwide

Residents across South Korea can expect a damp start to their Wednesday, May 27, 2026, as the country braces for widespread rain. The Korea Meteorological Administration (KMA) forecasts cloudy conditions throughout the day, with precipitation expected to continue until evening in some northern inland areas of Gyeonggi Province and Gangwon Province.

While rain is anticipated nationwide, many areas will experience intermittent showers, with some regions, particularly the northern inland parts of Gyeonggi and Gangwon, seeing rain extend into the evening. Light rain, less than 0.1mm, is possible in other parts of the Seoul metropolitan area, Gangwon, and the western coast of Chungnam Province.

Expected rainfall amounts are generally modest, with most regions anticipating around 5 to 10mm. The southern coastal areas, including Busan, Ulsan, and Gyeongnam, along with Daegu and Gyeongbuk, might see slightly higher amounts between 5-10mm. Jeju Island is also expected to receive around 5mm of rain.

Temperatures will be relatively mild, with daytime highs ranging between 19 and 28 degrees Celsius. These temperatures are largely in line with the seasonal average, which typically sees morning lows between 12-16 degrees and afternoon highs between 22-27 degrees. Major cities like Seoul, Incheon, and Suwon are forecast to reach 27 degrees Celsius.

Air quality is anticipated to remain favorable. The combination of active atmospheric diffusion and the cleansing effect of rainfall is expected to keep fine dust levels at 'good' to 'moderate' levels across all regions.