Visiting local bars in Ruili is more fun when you know what the weather holds. These temperatures and rainfall averages can help you determine the best time for bar-hopping. The hottest months are usually April and May, with an average temperature of 22°C, while the coldest months are January and December, with an average of 16°C. The rainiest months in Ruili are July, August, June and September, with each month seeing an average of 492 mm of rainfall.