A cold snap will hit the country on Thursday when students across the country take the college entrance exam.
Temperatures will be normal on Tuesday and Wednesday. But on Thursday the mercury is expected to drop around six degrees, the Korea Meteorological Administration said Monday.
Test-takers will have to brave morning lows of -5 degrees Celsius in Chuncheon, -3 in Seoul, -2 in Daejeon, 2 in Gwangju and Pohang and 3 in Busan.
Daytime highs will rise to five to seven degrees in central and southern parts. Snow or rain is expected in most parts in the afternoon.
The KMA advised test-takers to wear layered clothes to accommodate changes in temperature.