On Tuesday the 23rd, daytime highs in some central regions, including Seoul and Incheon, will rise to around 30 C. Jeju Island will see rain accompanied by strong winds, and there will be places with raindrops along the east coast and in the mountains of Gangwon.
According to the Korea Meteorological Administration on the 22nd, morning lows on the 23rd will be 15–20 C and daytime highs will be 22–30 C, similar to or a little lower than average.
Morning temperatures in major areas will be 19 C in Seoul, 20 C in Incheon, 19 C in Suwon, 16 C in Chuncheon, 17 C in Gangneung, 18 C in Daejeon, 19 C in Cheongju, 19 C in Gwangju Metropolitan City, 18 C in Jeonju, 19 C in Busan, 18 C in Ulsan, 17 C in Daegu, and 20 C in Jeju.
Daytime highs are forecast to be 29 C in Seoul, 29 C in Incheon, 28 C in Suwon, 27 C in Chuncheon, 23 C in Gangneung, 26 C in Daejeon, 27 C in Cheongju, 27 C in Gwangju Metropolitan City, 28 C in Jeonju, 24 C in Busan, 23 C in Ulsan, 24 C in Daegu, and 23 C in Jeju.
Rain will fall mainly on Jeju Island. The Korea Meteorological Administration said, "There will be places on Jeju Island where it rains through tomorrow night," and noted, "Some areas may see a lull in the rain from afternoon to night." From the 22nd to the 23rd, Jeju Island is expected to receive 20–80 mm of precipitation, so extra caution is needed as heavy rain is anticipated.
On Jeju Island, strong winds with instantaneous speeds of 70 km/h or more (90 km/h or more in the mountains) are expected from early morning on the 23rd, and a high wind advisory may be issued.
Waves will run 0.5–2.5 m off the east coast, 0.5–1.5 m off the west coast, and 0.5–2.0 m off the south coast.
Wave heights on the inner remote seas (the distant sea within about 200 km of the coastline) are expected to be 1.0–2.5 m in the East Sea and South Sea and 0.5–2.5 m in the West Sea.
Fine dust concentrations will be at a "good" level across all regions due to smooth atmospheric diffusion.