@SHIN MIN KYEONG: Thanks for adding the climate chart! That's very helpful information.
Can you include a link to the website page where you got the data? (It's okay if the website is only in Korean.) This is helpful so that in the future, someone can check whether there's newer data available. Look at how this is linked on Daejeon#Climate and Gwangju#Understand.
Format the link like
[http://website.co.kr/page Text to link], which will display like "Text to link".