On Saturday the 13th, the daytime high will climb to 32 degrees, bringing heat. Daytime temperatures in most regions nationwide are expected to be around 30 degrees. Daytime temperatures will range from 26 to 32 degrees, higher than average.
The ultraviolet index will be at a "very high" level across all areas from 12 p.m. to 3 p.m., except parts of South Gyeongsang and South Jeolla.
While the entire country experiences hot weather, showers are expected in the Jeolla region. From afternoon to evening, the Jeolla region is forecast to see showers accompanied by gusty winds and thunder and lightning.
Expected rainfall from the showers is 5–30 mm in Gwangju–South Jeolla and North Jeolla.
Showers may sharply reduce visibility and make roads slippery, so pay attention to traffic safety and accident prevention.
As of 5 a.m. that day, temperatures were 17.1 degrees in Seoul, 17.9 in Incheon, 14.5 in Suwon, 13.4 in Chuncheon, 22.7 in Gangneung, 18.0 in Cheongju, 14.9 in Daejeon, 15.6 in Jeonju, 17.9 in Gwangju, 20.2 in Jeju, 17.2 in Daegu, 20.3 in Busan, 17.5 in Ulsan, and 18.1 in Changwon.
Waves will run 0.5–1.0 meters in the coastal waters off the East and South Seas and 0.5–0.5 meters off the West Sea. In the inner offshore waters (the offshore area within about 200 km from the coastline), wave heights are expected to be 0.5–1.0 meters in the East, West, and South Seas.