If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Hamdeok: The hottest months are usually August and July with an average temp of 75°F, while the coldest months are January and February with an average of 46°F. The rainiest months in Hamdeok are July, September, August, and June, with each month seeing an average of 11 inches of rainfall.