You'll likely spend much of your trip indoors, but if you want to see more of the area, taking a look at local weather data can help you. The hottest months are usually July and August with an average temp of 68°F, while the coldest months are January and December with an average of 21°F. The rainiest months in Dandong are August, July, June, and May, with each month seeing an average of 8 inches of rainfall.