Weather is only one factor, but it can really affect your travel plans, especially if you're planning an extended stay in Jeongseon. The hottest months are usually August and July with an average temp of 68°F, while the coldest months are January and December with an average of 28°F. The rainiest months in Jeongseon are August, July, September, and June, with each month seeing an average of 8 inches of rainfall.