Taking into account the local weather in Santa Rosa de Cusubamba is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and August with an average temp of 55°F, while the coldest months are July and August with an average of 54°F. The rainiest months in Santa Rosa de Cusubamba are April, March, December, and November, with each month seeing an average of 13 inches of rainfall.