With the rainy season effectively ending on Tuesday, the 28th, most regions nationwide are expected to come under the influence of sweltering heat.
According to the Korea Meteorological Administration on the 27th, as daytime highs surge to as much as 36 degrees on the 28th, an extreme heat wave will hit parts of South Jeolla and the Yeongnam region, where the heat index will top 38 degrees. Brief showers of up to around 40 millimeters are expected in the capital area and other central regions.
Morning lows nationwide will range from 22 to 26 degrees, and daytime highs will be between 31 and 36 degrees. These figures are above the seasonal average, with daytime temperatures in the southern regions standing out as notably higher than normal.
Forecast morning temperatures in major cities by region are 25 to 26 degrees for Seoul, Chuncheon, Daejeon, Daegu, and Jeonju, and 27 degrees for Jeju. At midday, temperatures will reach 33 degrees in Seoul; 34 degrees in Daejeon, Jeonju, and Gwangju; and up to 35 degrees in Daegu.
Overnight heat will not dissipate sufficiently, and tropical-night conditions that disrupt sleep will be observed in many places. Authorities asked the public to manage personal health by adjusting indoor temperatures appropriately and drinking water frequently.
Meanwhile, sudden showers will pass mainly across the central region and inland North Gyeongsang. Expected rainfall amounts are 5 to 40 millimeters in Seoul, Incheon, and Gyeonggi; 5 to 40 millimeters in inland and mountainous Gangwon; and 5 to 20 millimeters along the Gangwon East Coast. The Chungcheong region and Daegu–North Gyeongsang will also see 5 to 40 millimeters, while Ulleungdo and Dokdo will record 5 to 20 millimeters.
These showers are expected to be noisy, accompanied by strong winds, thunder, and lightning. Rainfall totals will vary greatly by area, and conditions may briefly cool while the rain pours. However, once the rain stops, humidity in the air will climb, making the sticky heat even more intense, the Korea Meteorological Administration noted.