Sporadic showers were forecast for the most parts of the nation in the afternoon and evening on Monday. Some regions will see thunderstorms and hail, the Korea Meteorological Administration forecast.
Meanwhile, the summer monsoon is expected to start in mid-July, coming in later than in over 20 years, the weather agency said.
Back in 1992, the rainy season began on July 2, while between 1981 and 2010, the monsoon started on June 24-25 on average and lasted 32 days.
A powerful anticyclone hovering over Lake Baikal in Siberia is preventing the North Pacific anticyclone toward the Korean Peninsula, a weatherman said.