On Friday the 17th, it will be mostly cloudy nationwide and the early heat will ease.
According to the Korea Meteorological Administration on the 16th, from the morning to the night of the 17th, rain is expected mainly in the Chungcheong region, the southern provinces, and Jeju. Morning lows will be 7–14 degrees, and daytime highs will be 16–20 degrees, with the early-summer heat expected to break.
The capital area and Gangwon Province will be on the edge of a high-pressure system over the East Sea, so precipitation will be relatively limited.
The forecast rainfall over the two days through the 18th is 30–100 mm in Jeju Island (except the north) (over 150 mm in some mountainous areas, over 120 mm in mid-mountain areas), 20–60 mm in northern Jeju, Gwangju and South Jeolla, and western South Gyeongsang, 10–40 mm in Busan, Ulsan, and central and eastern South Gyeongsang, 5–30 mm in North Jeolla, 5–20 mm in Daegu and southern North Gyeongsang, around 5 mm in central and northern North Gyeongsang, Ulleung Island and Dokdo, and less than 5 mm in the Chungcheong region.
Waves will run 0.5–2.0 meters off the East and South seas and 0.5–1.5 meters off the West Sea. In the inner offshore waters (far seas within about 200 km of the coastline), wave heights are forecast at 0.5–2.5 meters in the East and West seas and 1.0–3.5 meters in the South Sea.
Fine dust concentrations are expected to be "good" to "moderate" nationwide.