Seoul/North has a wide temperature difference between summer and winter and much precipitation in comparison with that of the Continent. Also, it has distinct monsoon wind, a rainy period from the East-Asian Monsoon locally called "Changma", typhoon, and while often heavy snowfalls in winter. It belongs to a relatively wet region due to much more precipitation than that of the world average.
This website uses the Wikivoyage API to get and display all the information you see. This is the MediaWiki API, which is a general API for accessing data from Wikimedia projects. You can find information about it here: MediaWiki API.