Planning for the weather is a good way to make your trip to Sehwa-ri relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July with an average temp of 76°F, while the coldest months are January and February with an average of 47°F. The rainiest months in Sehwa-ri are September, July, August, and June, with each month seeing an average of 11 inches of rainfall.