On Thursday, the 19th, the weather will become cloudy nationwide, and the monsoon will begin in the central region.
From the morning, there will be rain in Jeju Island, in the afternoon in Chungnam and Jeolla provinces, in western Gyeongnam, and from night in the capital region, inland Gangwon, and Chungbuk.
The expected rainfall from now until the 20th is 20 to 60 mm in Seoul, Incheon, Gyeonggi, the five west seas, inland and mountainous regions of Gangwon, Daejeon, Sejong, Chungnam, and Chungbuk (with some areas in northern Gyeonggi, the five west seas, and northern inland Gangwon exceeding 80 mm), 5 to 20 mm on the eastern coast of Gangwon, in Gwangju, Jeonnam, and Daegu, and North Gyeongsang (excluding northern inland and northeastern mountainous regions), 10 to 40 mm in Jeonbuk, and 5 to 40 mm in Gyeongnam and northern inland and northeastern mountainous regions of Gyeongsang, as well as 5 to 30 mm in Jeju Island.
The morning low temperatures are forecasted to be between 18 and 24 degrees, while the daytime high temperatures are expected to range from 25 to 34 degrees.
Inland areas will see daytime temperatures rise around 30 degrees, and many places will experience a maximum perceived temperature exceeding 31 degrees.
The level of fine dust is expected to be in the "good" to "moderate" range nationwide.
Until the morning, there will be dense fog with visibility under 200 meters along the west coast of Chungnam, the coast of Jeolla, and the coast of Gyeongnam. Some areas may experience drizzle. In other regions, visibility will be below 1 km due to fog.
On the west sea, thunderstorms with gusts of wind are expected.
The sea waves are expected to be 0.5 to 1.0 meters in the East China Sea and South China Sea, and 0.5 to 1.5 meters in the West Sea.
The wave heights in the offshore waters (about 200 km from the coastline) are forecasted to be 0.5 to 1.5 meters in the East Sea, 0.5 to 2.5 meters in the West Sea, and 0.5 to 2.0 meters in the South Sea.