In its forecast issued at 04:40 on August 29, the Korea Meteorological Administration said rain or showers could occur nationwide through August 31. In particular, 50–100 mm of rain is expected across Chungcheong from August 30–31, with more than 150 mm possible in parts of southern Chungcheong.

North Jeolla is also expected to receive 50–100 mm, with more than 150 mm in some areas. Gwangju and South Jeolla may receive 30–80 mm, with more than 100 mm in some locations. Parts of Chungcheong and Jeolla could see rainfall of 20–30 mm per hour, while some areas may receive more than 50 mm per hour.

The key issue is not simply the possibility of rain nationwide, but the likelihood that rainfall will be concentrated in Chungcheong and Jeolla on August 30–31, along with the intensity of hourly rainfall.

How long will the rain continue?

According to the KMA forecast, rain will fall nationwide on August 30 and is expected to mostly stop by the night of August 31. If you have travel plans or outdoor activities from the weekend through August 31, check for changes in the forecast for your specific area.

Figures in search terms differ from the official forecast

Recent search terms included phrases such as “up to 80 mm in Gangwon on Sunday” and “up to 200 mm in Chungnam,” but these differ from the official KMA forecast currently available. Gangwon’s expected rainfall range for August 30–31 is listed as 20–60 mm, while more than 150 mm is considered possible in southern Chungcheong. The figures in those search terms should not be presented as if they were confirmed KMA forecasts.

Current weather advisories and what to check

As of the 10:00 announcement on August 29, the KMA indicated that there were no active weather advisories. However, forecasts and advisories can change depending on the announcement time, so check the latest information on 날씨누리 and the weather radar again just before publication.

Source: Korea Meteorological Administration 날씨누리 short-term forecast, weather analysis, and current weather advisories (checked at 09:25 UTC on August 29, 2026) — https://www.weather.go.kr/w/wnuri-fct2021/weather/warning.do