In Perú you will SEE THE 4 season of THE year in one Day subject to you WHERE you would to GO. If you come to northern of Perú especificly to Trujillo, Chiclayo and Piura our whether IS GRATE.. Its very sunny and warm. So WE dont have raining season.. ALL year IS pretty and wonderfull to stay couples weeks. However it does not happen in highland or Amazon.