Weather will likely play an important role when you plan your trip to Kasu-ri, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 22°C, while the coldest months are January and February, with an average of 2°C. The rainiest months in Kasu-ri are July, August, September and June, with each month seeing an average of 239 mm of rainfall.