Planning for the weather is a good way to make your trip to Jeongseon relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 20°C, while the coldest months are January and December, with an average of -2°C. The rainiest months in Jeongseon are August, July, September and June, with each month seeing an average of 211 mm of rainfall.