If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Wonyul-ri: The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are January and February, with an average of 3°C. The rainiest months in Wonyul-ri are July, August, September and June, with each month seeing an average of 220 mm of rainfall.