Taking into account the local weather in Rionegro is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and September with an average temp of 63°F, while the coldest months are January and July with an average of 63°F. The rainiest months in Rionegro are April, May, October, and November, with each month seeing an average of 17 inches of rainfall.