Weather is probably a major factor when you plan your trip to Imjang-gol, and keep 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 temp of 73°F, while the coldest months are January and February with an average of 35°F. The rainiest months in Imjang-gol are July, August, September, and June, with each month seeing an average of 8 inches of rainfall.