You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually August and July with an average temp of 71°F, while the coldest months are January and December with an average of 29°F. The rainiest months in Chuncheon are July, August, June, and September, with each month seeing an average of 10 inches of rainfall.