Weather is probably a major factor when you plan your trip to Sinbuk-myeon, 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 December with an average of 31°F. The rainiest months in Sinbuk-myeon are July, August, June, and September, with each month seeing an average of 9 inches of rainfall.