It's hot during the day and chilly in the morning and night,... and we're seeing a gap of about 10 degrees between the highs and lows.
For more details, let's turn to our Michelle Park at the weather center, Michelle?
The air is quite different when the sun goes down.
During the day, the temperature rises rapidly with the autumn sunshine, but it cools down very quickly soon after sunset.
So make sure to have an extra layer to wear to stay warm.
As the heat continues to linger, the leaves will start to change color a little later than usual.
The first autumn leaves of the season can be seen on Seoraksan mountain this weekend,... and the changes in the foliage will gradually be seen in regions further south.
The best time to see the autumn leaves will be in about two weeks when around 80 percent of the leaves have changed color.
The nation will begin Thursday under cloudy skies,... and the morning will be slightly warmer in Seoul, Gwangju and Daegu which starts the day at 17 degrees Celsius, Busan at 20 while Jeju begins at 21 degrees.
Jeju will start to see rain in the afternoon with a daily high of 26 degrees,... while Seoul seems to be on the hotter side, rising to 28 degrees.
I'll leave you with the weather conditions around the world.