Rainy Myeong-dong street (Seoul=Yonhap News) Reporter Ryu Young-shik - Citizens and foreign tourists walk with umbrellas on a street in Myeong-dong, Seoul, where a shower is falling on the 10th. 2026.7.10 ondol@yna.co.kr

Friday the 17th, Constitution Day, will be cloudy nationwide with monsoon rain continuing in regions south of Chungcheong.

Expected precipitation is 20–60mm for Daejeon, Sejong, South Chungcheong, and the southern part of North Chungcheong, and 30–80mm for North Jeolla, Gwangju, and South Jeolla.

Rainfall of 30–80mm is expected for Busan, Ulsan, and South Gyeongsang; 20–60mm for Daegu and North Gyeongsang; and 5–30mm for Jeju Island.

This monsoon rain is expected to spread across the entire country, including the Seoul metropolitan area, starting from the weekend on the 18th.

Morning lows are forecast between 21–25°C, and daytime highs between 27–33°C.

Sea waves are expected to reach 0.5–1.5m in the coastal waters off the East and South Seas, and 0.5–1.0m off the West Sea. Wave heights in the inner offshore waters (approximately within 200km of the coastline) are expected to be 0.5–2.0m for the East and South Seas and 0.5–1.5m for the West Sea.

The following is the weather forecast by region for the 17th.

[Morning, Afternoon] (Low~High Temperature) <Morning, Afternoon Precipitation Probability>

▲ Seoul: [Cloudy, Cloudy] (23–32) <30, 30>

▲ Incheon: [Cloudy, Cloudy] (23–31) <30, 30>

▲ Suwon: [Cloudy, Cloudy] (23–31) <30, 30>

▲ Chuncheon: [Cloudy, Mostly Cloudy] (23–31) <30, 20>

▲ Gangneung: [Cloudy, Cloudy] (23–29) <30, 30>

▲ Cheongju: [Cloudy, Cloudy] (24–31) <30, 30>

▲ Daejeon: [Cloudy with occasional rain, Cloudy with occasional rain] (23–30) <60, 60>

▲ Sejong: [Cloudy, Cloudy] (23–30) <30, 30>

▲ Jeonju: [Cloudy with rain, Cloudy with intermittent rain] (24–30) <80, 70>

▲ Gwangju: [Cloudy with rain, Cloudy with rain] (25–30) <80, 80>

▲ Daegu: [Cloudy with intermittent rain, Cloudy with intermittent rain] (24–33) <60, 90>

▲ Busan: [Cloudy with intermittent rain, Cloudy with rain] (24–29) <70, 80>

▲ Ulsan: [Cloudy with intermittent rain, Cloudy with rain] (24–30) <70, 80>

▲ Changwon: [Cloudy with occasional rain, Cloudy with rain] (25–30) <60, 80>

▲ Jeju: [Cloudy with rain, Cloudy with rain] (26–31) <60, 60>

※ This article was produced using artificial intelligence (AI) technology. The final article was completed by a reporter based on an AI-generated draft and meteorological data from the Korea Meteorological Administration, and underwent a desk editing process.

The raw meteorological forecast data from the Korea Meteorological Administration can also be verified on their website (https://www.weather.go.kr). [Yonhap News]