Heatwave alerts have been issued for most parts of the country, with the mercury jumping to more than 33 degrees Celsius.
For more details, let's turn to our Michelle Park at the weather center, Michelle?
Today was Daeseo here in Korea, traditionally known as the hottest day of the year.
And it surely lived up to its meaning, as temperatures soared across the nation, triggering heatwave advisories in most parts of the country, while some eastern regions were issued heatwave warnings.
On Wednesday, overcast skies will dominate over the peninsula, with sporadic showers until 9 PM.
Meanwhile, Beijing is going to be unbearably hot at 37 degrees Celsius.
The nation is expecting to experience tropical nights as most places including Seoul will wake up to 25 degrees Celsius tomorrow morning.
High temperatures will grip the nation by the afternoon,
with Seoul topping at 30 degrees Celsius, while Gwangju and Daegu hit 33, and Gyeongju higher at 34 degrees.
From Thursday, another round of monsoon rain will drench the country, which should relieve some of the heat in the air at least until Saturday.
And this shows to be the last bit of monsoon rain of the season.
I'll leave you with the weather conditions around the world.