If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Iksan: The hottest months are usually August and July with an average temp of 74°F, while the coldest months are January and February with an average of 37°F. The rainiest months in Iksan are July, August, September, and June, with each month seeing an average of 9 inches of rainfall.