Visiting local bars in Ruili is more fun when you know what the weather holds. These temperatures and rainfall averages can help you decide the best time for bar hopping. The hottest months are usually April and May with an average temp of 72°F, while the coldest months are January and December with an average of 60°F. The rainiest months in Ruili are July, August, June, and September, with each month seeing an average of 19 inches of rainfall.