Planning for the weather is an important factor for making your trip to Sangun-ri a success, especially when you're splurging. The hottest months are usually August and July with an average temp of 70°F, while the coldest months are January and February with an average of 34°F. The rainiest months in Sangun-ri are August, July, September, and June, with each month seeing an average of 8 inches of rainfall.