On Saturday the 4th, the country will be mostly cloudy, with heavy rain focused on Jeju Island and the southern part of South Jeolla.
According to the Korea Meteorological Administration on the 3rd, rain will fall over the Chungcheong region and the southern provinces until night, and there will be places with passing showers in the inland central areas such as Incheon, northern Gyeonggi, and North Chungcheong.
Until the morning, Jeju Island and the southern part of South Jeolla are expected to see heavy rain of 20–30 mm per hour, accompanied by gusts and thunder and lightning.
Expected precipitation is 5–10 mm in the Chungcheong region, 5–40 mm in the Jeolla region, 5–40 mm in the Gyeongsang region, and 30–80 mm on Jeju Island. For showers, 5–20 mm is expected in Incheon, northern Gyeonggi, and North Chungcheong, and 5–20 mm in Daegu and the southern inland of North Gyeongsang.
Morning lows will be 19–23 C, and afternoon highs will be 25–32 C, similar to or slightly higher than average.
Morning lows in major areas will be 23 C in Seoul, 22 C in Incheon, 22 C in Suwon, 20 C in Chuncheon, 22 C in Gangneung, 22 C in Cheongju, 21 C in Daejeon, 22 C in Jeonju, 22 C in Gwangju, 21 C in Daegu, 21 C in Busan, and 23 C in Jeju.
Afternoon highs will be 31 C in Seoul, 30 C in Incheon, 31 C in Suwon, 31 C in Chuncheon, 30 C in Gangneung, 32 C in Cheongju, 31 C in Daejeon, 30 C in Jeonju, 29 C in Gwangju, 30 C in Daegu, 27 C in Busan, and 28 C in Jeju.
Fine dust levels are expected to range from "good" to "moderate" nationwide.
Waves will run 0.5–1.5 meters off the east and south coasts and 0.5–1.0 meters off the west coast.
Wave heights on the inner offshore waters (the open sea within about 200 km of the coastline) are expected to be 0.5–1.5 meters in the East Sea, West Sea, and South Sea.