Thursday will bring mostly clear skies across South Korea, but inland areas will see wide daily temperature swings, the Korea Meteorological Administration (KMA) said Wednesday.
A high-pressure system moving eastward from the Yellow Sea will keep skies largely clear nationwide on Thursday, the KMA said.
Morning lows are forecast at 2 to 9 degrees Celsius and afternoon highs at 14 to 21 degrees, near or slightly above seasonal averages. However, the gap between daytime and nighttime temperatures is expected to reach around 15 degrees in inland areas, making mornings and evenings feel chilly.
Forecast morning lows and afternoon highs for major cities are as follows:
△ Seoul: 6–18°C △ Incheon: 6–14°C △ Suwon: 5–17°C △ Chuncheon: 3–18°C △ Gangneung: 8–17°C △ Daejeon: 4–19°C △ Sejong: 4–18°C △ Gwangju: 7–19°C △ Daegu: 7–20°C △ Busan: 10–19°C.
Morning temperatures in southern Chungcheong inland areas and the Jeolla region are expected to drop by 5 to 10 degrees, while afternoon temperatures in the Gyeongsang region will climb to around 20 degrees. Frost may form from dawn to morning in northern Gyeonggi inland areas.
Fine dust levels will remain at "moderate" nationwide, but the Seoul metropolitan area and Chungcheong region will see levels rise to "unhealthy" in the afternoon, followed by the Honam region from nighttime. The deterioration is attributed to domestically generated fine dust lingering under stagnant atmospheric conditions, compounded by foreign particulate matter carried in by westerly winds from the afternoon.
Dense fog with visibility under 200 meters is expected in parts of Gangwon Province, inland Chungcheong, inland North Jeolla, and South Jeolla until the morning hours.