Intense Heat and Tropical Nights Continue... Occasional Rain in Seoul Metropolitan Area and Gangwon Province

On Friday, July 4, most regions across the country are expected to continue experiencing intense heat.

As the rainy season continues along with nationwide heatwaves, humid and hot weather persists. On July 1, 2025, an air conditioner outdoor unit is installed on a building near Namdaemun Market in Jung-gu, Seoul. Photo by Yoon Dongju

Morning low temperatures are forecast to range from 21 to 28 degrees Celsius, while daytime highs are expected to reach between 30 and 36 degrees Celsius. With heatwave advisories in effect nationwide, the maximum perceived temperature in most areas will rise above 33 degrees Celsius (around 35 degrees Celsius in parts of Gyeonggi Province, the east coast of Gangwon Province, the Chungcheong region, southern regions, and eastern Jeju Island), resulting in very hot conditions. Many regions will continue to experience tropical nights for the time being. The Seoul metropolitan area and Gangwon Province are expected to be mostly cloudy, while other regions will remain mostly clear.

In the Seoul metropolitan area and the inland and mountainous areas of Gangwon Province, there may be places where less than 0.1 mm of raindrops fall between early morning and morning, and occasional rain is also expected from morning to evening. Expected precipitation is 5 to 20 mm in Incheon, northern Gyeonggi Province, the five West Sea islands, and inland and mountainous areas of Gangwon Province, and around 5 mm in Seoul and southern Gyeonggi Province. In areas where rain falls, there may be gusty winds accompanied by thunder and lightning. Fine dust concentrations are expected to remain at 'good' to 'moderate' levels nationwide due to smooth atmospheric dispersion.

Until the morning, there may be areas with fog reducing visibility to less than 1 km, mainly along the west and south coasts and in inland regions. Sea fog is also expected in the West and South Seas, and in island regions, dense fog with visibility below 200 meters may occur along with light drizzle. In the central part of the West Sea, there may be places where gusty winds are accompanied by thunder and lightning.

Wave heights are expected to be 0.5 to 1.5 meters in the coastal waters of the East and West Seas, and 0.5 to 1.0 meters in the coastal waters of the South Sea. In the offshore areas closer to the open sea (up to about 200 km from the coastline), wave heights are forecast to be 0.5 to 1.5 meters in the East Sea, 0.5 to 2.0 meters in the West Sea, and 0.5 to 1.0 meters in the South Sea.