Weather will likely play an important role when you plan your trip to Haengjeong-dong, 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 72°F, while the coldest months are January and February with an average of 36°F. The rainiest months in Haengjeong-dong are July, August, September, and June, with each month seeing an average of 9 inches of rainfall.